From f432bdd2fbdbf598280fcf9c569a761e28b04ca6 Mon Sep 17 00:00:00 2001
From: Sami Spets <savasp@utu.fi>
Date: Wed, 18 Sep 2019 11:22:10 +0300
Subject: [PATCH] merge master

---
 .gitignore                                    |     1 +
 .gitlab-ci.yml                                |     2 +-
 CMakeLists.txt                                |    34 +-
 applications/calibration-multi/src/main.cpp   |     8 +-
 .../calibration-multi/src/multicalibrate.cpp  |     7 +
 applications/groupview/src/main.cpp           |     4 +-
 .../include/ftl/matrix_conversion.hpp         |     2 +-
 .../reconstruct/include/ftl/registration.hpp  |   184 -
 applications/reconstruct/src/integrators.cu   |     2 +-
 applications/reconstruct/src/main.cpp         |     4 +
 applications/reconstruct/src/mls.cu           |     2 +-
 applications/reconstruct/src/registration.cpp |   507 +-
 components/codecs/CMakeLists.txt              |    26 +
 components/codecs/README.md                   |     0
 .../codecs/include/ftl/codecs/bitrates.hpp    |   118 +
 .../codecs/include/ftl/codecs/decoder.hpp     |    46 +
 .../codecs/include/ftl/codecs/encoder.hpp     |    98 +
 .../include/ftl/codecs/nvpipe_decoder.hpp     |    31 +
 .../include/ftl/codecs/nvpipe_encoder.hpp     |    42 +
 .../include/ftl/codecs/opencv_decoder.hpp     |    22 +
 .../include/ftl/codecs/opencv_encoder.hpp     |    48 +
 .../codecs/include/ftl/codecs/packet.hpp      |    44 +
 components/codecs/src/bitrates.cpp            |    53 +
 components/codecs/src/decoder.cpp             |    25 +
 components/codecs/src/encoder.cpp             |    77 +
 components/codecs/src/generate.cpp            |    45 +
 components/codecs/src/nvpipe_decoder.cpp      |    79 +
 components/codecs/src/nvpipe_encoder.cpp      |   125 +
 components/codecs/src/opencv_decoder.cpp      |    65 +
 components/codecs/src/opencv_encoder.cpp      |   116 +
 components/codecs/test/CMakeLists.txt         |    32 +
 components/codecs/test/catch.hpp              | 14362 ++++++++++++++++
 components/codecs/test/nvpipe_codec_unit.cpp  |   121 +
 components/codecs/test/opencv_codec_unit.cpp  |    96 +
 components/codecs/test/tests.cpp              |     3 +
 components/common/cpp/include/ftl/config.h.in |     2 +
 components/common/cpp/include/ftl/threads.hpp |     4 +-
 components/common/cpp/src/timer.cpp           |     2 +-
 components/net/cpp/src/dispatcher.cpp         |     8 +-
 components/net/cpp/src/peer.cpp               |    11 +-
 components/net/cpp/src/universe.cpp           |    31 +-
 components/rgbd-sources/CMakeLists.txt        |     3 +-
 .../include/ftl/rgbd/detail/netframe.hpp      |     1 +
 .../include/ftl/rgbd/detail/source.hpp        |    21 +-
 .../rgbd-sources/include/ftl/rgbd/frame.hpp   |   137 +
 .../rgbd-sources/include/ftl/rgbd/group.hpp   |    12 +-
 .../rgbd-sources/include/ftl/rgbd/source.hpp  |     1 +
 .../include/ftl/rgbd/streamer.hpp             |    40 +-
 components/rgbd-sources/src/abr.cpp           |    10 +-
 .../src/algorithms/fixstars_sgm.cpp           |    87 +-
 .../src/algorithms/fixstars_sgm.hpp           |    12 +-
 components/rgbd-sources/src/disparity.cpp     |    28 +-
 components/rgbd-sources/src/disparity.hpp     |    35 +-
 components/rgbd-sources/src/frame.cpp         |    68 +
 components/rgbd-sources/src/group.cpp         |    50 +-
 components/rgbd-sources/src/net.cpp           |   132 +-
 components/rgbd-sources/src/net.hpp           |    25 +-
 components/rgbd-sources/src/offilter.cpp      |     7 +-
 components/rgbd-sources/src/stereovideo.cpp   |    95 +-
 components/rgbd-sources/src/stereovideo.hpp   |    16 +-
 components/rgbd-sources/src/streamer.cpp      |   425 +-
 config/config_nick.jsonc                      |    12 +-
 web-service/client/.gitignore                 |    18 +
 web-service/client/package-lock.json          | 13159 ++++++++++++++
 web-service/client/package.json               |    29 +
 web-service/client/public/index.html          |    31 +
 web-service/client/services/login.js          |     9 +
 web-service/client/src/App.css                |    41 +
 web-service/client/src/App.js                 |    51 +
 web-service/client/src/Streams.js             |     7 +
 web-service/client/src/index.js               |     8 +
 web-service/server/package-lock.json          |   511 +
 web-service/server/package.json               |     7 +-
 web-service/server/src/index.js               |   111 +-
 web-service/server/src/passport/passport.js   |    15 +
 web-service/server/src/peer.js                |    57 +-
 76 files changed, 30727 insertions(+), 1033 deletions(-)
 create mode 100644 components/codecs/CMakeLists.txt
 create mode 100644 components/codecs/README.md
 create mode 100644 components/codecs/include/ftl/codecs/bitrates.hpp
 create mode 100644 components/codecs/include/ftl/codecs/decoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/encoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/nvpipe_decoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/nvpipe_encoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/opencv_decoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/opencv_encoder.hpp
 create mode 100644 components/codecs/include/ftl/codecs/packet.hpp
 create mode 100644 components/codecs/src/bitrates.cpp
 create mode 100644 components/codecs/src/decoder.cpp
 create mode 100644 components/codecs/src/encoder.cpp
 create mode 100644 components/codecs/src/generate.cpp
 create mode 100644 components/codecs/src/nvpipe_decoder.cpp
 create mode 100644 components/codecs/src/nvpipe_encoder.cpp
 create mode 100644 components/codecs/src/opencv_decoder.cpp
 create mode 100644 components/codecs/src/opencv_encoder.cpp
 create mode 100644 components/codecs/test/CMakeLists.txt
 create mode 100644 components/codecs/test/catch.hpp
 create mode 100644 components/codecs/test/nvpipe_codec_unit.cpp
 create mode 100644 components/codecs/test/opencv_codec_unit.cpp
 create mode 100644 components/codecs/test/tests.cpp
 create mode 100644 components/rgbd-sources/include/ftl/rgbd/frame.hpp
 create mode 100644 components/rgbd-sources/src/frame.cpp
 create mode 100644 web-service/client/.gitignore
 create mode 100644 web-service/client/package-lock.json
 create mode 100644 web-service/client/package.json
 create mode 100644 web-service/client/public/index.html
 create mode 100644 web-service/client/services/login.js
 create mode 100644 web-service/client/src/App.css
 create mode 100644 web-service/client/src/App.js
 create mode 100644 web-service/client/src/Streams.js
 create mode 100644 web-service/client/src/index.js
 create mode 100644 web-service/server/package-lock.json
 create mode 100644 web-service/server/src/passport/passport.js

diff --git a/.gitignore b/.gitignore
index 8450d6e9c..1e2b94708 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ lab-designs/viewer
 .vscode
 doc/
 web-service/npm-debug.log
+web-service/server/src/passport/keys.js
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 914e55497..28e09eeb3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,7 +32,7 @@ linux:
 windows:
   stage: all
   variables:
-    CMAKE_ARGS: '-DWITH_PCL=FALSE -DCMAKE_GENERATOR_PLATFORM=x64 -DEigen3_DIR="C:/Program Files (x86)/Eigen3/share/eigen3/cmake" -DOpenCV_DIR="D:/Build/opencv-4.1.1" -DCUDA_TOOLKIT_ROOT_DIR="C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.1"'
+    CMAKE_ARGS: '-DWITH_OPTFLOW=TRUE -DWITH_PCL=FALSE -DCMAKE_GENERATOR_PLATFORM=x64 -DNVPIPE_DIR="D:/Build/NvPipe" -DEigen3_DIR="C:/Program Files (x86)/Eigen3/share/eigen3/cmake" -DOpenCV_DIR="D:/Build/opencv-4.1.1" -DCUDA_TOOLKIT_ROOT_DIR="C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.1"'
     DEPLOY_DIR: 'D:/Shared/AutoDeploy'
   tags:
     - win
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 47991799f..95530e23a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,8 @@ include(CTest)
 enable_testing()
 
 option(WITH_PCL "Use PCL if available" OFF)
+option(WITH_NVPIPE "Use NvPipe for compression if available" ON)
+option(WITH_OPTFLOW "Use NVIDIA Optical Flow if available" OFF)
 option(WITH_FIXSTARS "Use Fixstars libSGM if available" ON)
 option(BUILD_VISION "Enable the vision component" ON)
 option(BUILD_RECONSTRUCT "Enable the reconstruction component" ON)
@@ -28,6 +30,11 @@ find_package( URIParser REQUIRED )
 find_package( MsgPack REQUIRED )
 find_package( Eigen3 REQUIRED )
 
+if (WITH_OPTFLOW)
+	# TODO check that cudaoptflow.hpp exists (OpenCV built with correct contrib modules)
+	set(HAVE_OPTFLOW true)
+endif()
+
 find_package( LibArchive )
 if (LibArchive_FOUND)
 	set(HAVE_LIBARCHIVE true)
@@ -87,6 +94,28 @@ if (NANOGUI_LIBRARY)
     message(STATUS "Found NanoGUI: ${NANOGUI_LIBRARY}")
 endif()
 
+find_library( NVPIPE_LIBRARY NAMES NvPipe libNvPipe PATHS ${NVPIPE_DIR} PATH_SUFFIXES lib)
+if (NVPIPE_LIBRARY)
+	set(HAVE_NVPIPE TRUE)
+	add_library(nvpipe UNKNOWN IMPORTED)
+	#set_property(TARGET nanogui PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${NANOGUI_EXTRA_INCS})
+	set_property(TARGET nvpipe PROPERTY IMPORTED_LOCATION ${NVPIPE_LIBRARY})
+	message(STATUS "Found NvPipe: ${NVPIPE_LIBRARY}")
+	
+	if(WIN32)
+		# Find include
+		find_path(NVPIPE_INCLUDE_DIRS
+		    NAMES NvPipe.h
+		    PATHS "C:/Program Files/NvPipe" "C:/Program Files (x86)/NvPipe" ${NVPIPE_DIR}
+		    PATH_SUFFIXES include
+		)
+		set_property(TARGET nvpipe PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${NVPIPE_INCLUDE_DIRS})
+	endif()
+else()
+	set(NVPIPE_LIBRARY "")
+	add_library(nvpipe INTERFACE)
+endif()
+
 find_program( NODE_NPM NAMES npm )
 if (NODE_NPM)
 	message(STATUS "Found NPM: ${NODE_NPM}")
@@ -172,6 +201,7 @@ SET(CMAKE_USE_RELATIVE_PATHS ON)
 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 
 add_subdirectory(components/common/cpp)
+add_subdirectory(components/codecs)
 add_subdirectory(components/net)
 add_subdirectory(components/rgbd-sources)
 add_subdirectory(components/control/cpp)
@@ -193,10 +223,10 @@ if (BUILD_CALIBRATION)
 endif()
 
 if (HAVE_PCL)
-	add_subdirectory(applications/registration)
+	#add_subdirectory(applications/registration)
 endif()
 
-if (BUILD_RECONSTRUCT AND HAVE_PCL)
+if (BUILD_RECONSTRUCT)
 	add_subdirectory(applications/reconstruct)
 endif()
 
diff --git a/applications/calibration-multi/src/main.cpp b/applications/calibration-multi/src/main.cpp
index 0901be79c..f9c258d76 100644
--- a/applications/calibration-multi/src/main.cpp
+++ b/applications/calibration-multi/src/main.cpp
@@ -204,8 +204,9 @@ void calibrate(	MultiCameraCalibrationNew &calib, vector<string> &uri_cameras,
 	if (params.reference_camera < 0) {
 		reference_camera = calib.getOptimalReferenceCamera();
 		reference_camera -= (reference_camera & 1);
+		LOG(INFO) << "optimal camera (automatic): " << reference_camera;
 	}
-	LOG(INFO) << "optimal camera: " << reference_camera;
+	LOG(INFO) << "reference camera: " << reference_camera;
 
 	if (params.optimize_intrinsic) calib.setFixIntrinsic(0);
 
@@ -536,11 +537,13 @@ int main(int argc, char **argv) {
 	const int min_visible = root->value<int>("min_visible", 3);
 	// minimum for how many times pattern is seen per camera
 	const int n_views = root->value<int>("n_views", 500);
+	// reference camera, -1 for automatic
+	const int ref_camera = root->value<int>("reference_camera", -1);
 	// registration file path
 	const string registration_file = root->value<string>("registration_file", FTL_LOCAL_CONFIG_ROOT "/registration.json");
 	// location where extrinsic calibration files saved
 	const string output_directory = root->value<string>("output_directory", "./");
-
+	
 	CalibrationParams params;
 	params.save_extrinsic = save_extrinsic;
 	params.save_intrinsic = save_intrinsic;
@@ -560,6 +563,7 @@ int main(int argc, char **argv) {
 				<< "\n     calibration_data_file: " << calibration_data_file
 				<< "\n               min_visible: " << min_visible
 				<< "\n                   n_views: " << n_views
+				<< "\n          reference_camera: " << ref_camera << (ref_camera != -1 ? "" : " (automatic)")
 				<< "\n         registration_file: " << registration_file
 				<< "\n          output_directory: " << output_directory
 				<< "\n";
diff --git a/applications/calibration-multi/src/multicalibrate.cpp b/applications/calibration-multi/src/multicalibrate.cpp
index 074e778ed..2292d178d 100644
--- a/applications/calibration-multi/src/multicalibrate.cpp
+++ b/applications/calibration-multi/src/multicalibrate.cpp
@@ -393,6 +393,13 @@ double MultiCameraCalibrationNew::calibratePair(size_t camera_from, size_t camer
 	vector<uchar> inliers;
 	Mat F, E;
 	F = cv::findFundamentalMat(points1, points2, fm_method_, fm_ransac_threshold_, fm_confidence_, inliers);
+
+	if (F.empty())
+	{
+		LOG(ERROR) << "Fundamental matrix estimation failed. Possibly degenerate configuration?";
+		return INFINITY;
+	}
+
 	E = K2.t() * F * K1;
 
 	// Only include inliers
diff --git a/applications/groupview/src/main.cpp b/applications/groupview/src/main.cpp
index 03a6dad32..3a821a013 100644
--- a/applications/groupview/src/main.cpp
+++ b/applications/groupview/src/main.cpp
@@ -307,8 +307,8 @@ int main(int argc, char **argv) {
 		LOG(INFO) << "Video mode";
 		modeVideo(root);
 	} else {
-		modeVideo(root);
-		//modeFrame(root);
+		//modeVideo(root);
+		modeFrame(root);
 	}
 
 	ftl::running = false;
diff --git a/applications/reconstruct/include/ftl/matrix_conversion.hpp b/applications/reconstruct/include/ftl/matrix_conversion.hpp
index ac0bff14d..2888e928e 100644
--- a/applications/reconstruct/include/ftl/matrix_conversion.hpp
+++ b/applications/reconstruct/include/ftl/matrix_conversion.hpp
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include <eigen3/Eigen/Eigen>
+#include <Eigen/Eigen>
 // #include "d3dx9math.h"
 #include <ftl/cuda_matrix_util.hpp>
 
diff --git a/applications/reconstruct/include/ftl/registration.hpp b/applications/reconstruct/include/ftl/registration.hpp
index 20f8eac6a..1af4de8a5 100644
--- a/applications/reconstruct/include/ftl/registration.hpp
+++ b/applications/reconstruct/include/ftl/registration.hpp
@@ -6,10 +6,6 @@
 #include <ftl/rgbd.hpp>
 #include <opencv2/opencv.hpp>
 
-#ifdef HAVE_PCL
-
-#include <pcl/common/common_headers.h>
-#include <pcl/point_cloud.h>
 
 namespace ftl {
 namespace registration {
@@ -20,187 +16,7 @@ void from_json(nlohmann::json &json, std::map<std::string, Eigen::Matrix4d> &tra
 bool loadTransformations(const std::string &path, std::map<std::string, Eigen::Matrix4d> &data);
 bool saveTransformations(const std::string &path, std::map<std::string, Eigen::Matrix4d> &data);
 
-/** @brief	Find transformation matrix for transforming clouds_source to clouds_target.
- *			Assumes that corresponding points in clouds_source[i] and clouds_target[i] have same indices.
- */
-Eigen::Matrix4f findTransformation(	std::vector<pcl::PointCloud<pcl::PointXYZ>::Ptr> clouds_source,
-									std::vector<pcl::PointCloud<pcl::PointXYZ>::Ptr> clouds_target);
-
-
-/** @brief Convert chessboard corners found with OpenCV's findChessboardCorners to PCL point cloud. */
-pcl::PointCloud<pcl::PointXYZ>::Ptr cornersToPointCloud(const std::vector<cv::Point2f> &corners, const cv::Mat &disp, const ftl::rgbd::Camera &p);
-
-/** @brief 	Find chessboard corners from image and store them in PCL PointCloud.
- * 	@note	Corners will be drawn in rgb.
- */
-bool findChessboardCorners(cv::Mat &rgb, const cv::Mat &depth, const ftl::rgbd::Camera &p, const cv::Size pattern_size, pcl::PointCloud<pcl::PointXYZ>::Ptr &out, float error_threshold);
-
-/**
- * @brief	Abstract class for registration
- * 
- * Registration procedure 
- * 
- * @todo	Support for multiple features (possibly necessary for other algorithms).
- */
-class Registration : public ftl::Configurable {
-public:
-	explicit Registration(nlohmann::json &config);
-	void addSource(ftl::rgbd::Source* source);
-	size_t getSourcesCount() { return sources_.size(); }
-
-	/**
-	 * @brief	Run registration loop. 
-	 * 
-	 * Loop terminates when processData() returns false.
-	 */
-	virtual void run();
-
-	/**
-	 * @brief	Find registration transformations. run() must be called before
-	 * 			findTransformations(). Transformations are in same order as
-	 * 			sources were added with addSource().
-	 * 
-	 * Transformations are calculated to targetsource if configured. If
-	 * targetsource is not configured or is not found in inputs, which target
-	 * coordinate system is used depends on sub-classes' implementation.
-	 * 
-	 * @param	Output parameter for transformations.
-	 * @return	True if transformations found, otherwise false.
-	 */
-	virtual bool findTransformations(std::vector<Eigen::Matrix4f> &data)=0;
-	
-	/**
-	 * @brief	Overload of findTransformations(). Map keys are source URIs.
-	 */
-	virtual bool findTransformations(std::map<std::string, Eigen::Matrix4f> &data);
-
-protected:
-	ftl::rgbd::Source* getSource(size_t idx);
-
-	bool isTargetSourceSet();
-	bool isTargetSourceFound();
-	bool isTargetSource(ftl::rgbd::Source* source); 
-	bool isTargetSource(size_t idx); 
-	
-	/**
-	 * @brief	Get index for target source. If target source not defined
-	 * 			returns 0. If target source is not found, returns 0.
-	 */
-	size_t getTargetSourceIdx();
-	
-	/**
-	 * @brief	Resets visibility matrix.
-	 */
-	void resetVisibility();
-
-	/**
-	 * @brief	Check if there is enough data to cover all the cameras;
-	 * 			that is visibility is a connected graph. Implemented with BFS.
-	 * 			Implementations of processData() in sub-classes may use this
-	 * 			method (but it is not required).
-	 * 
-	 * @todo	Add support for checking visibility for each different features
-	 * 			found in all images. Also see findFeatures().
-	 */
-	bool connectedVisibility();
-
-	/**
-	 * @brief	Check if there are enough data for all the sources to calculate
-	 * 			transformations. Method may also implement additional processing
-	 * 			for the data. Called once after iteration round. run() stops
-	 * 			when processData() returns false.
-	 */
-	virtual bool processData()=0;
-
-	/**
-	 * @brief	Find features in source, return 
-	 * 
-	 * Called iteratively n times for every input (n * inputs.size()). Exact
-	 * details depend on implementation of processData(). Implementations may
-	 * choose not to set/use visibility information.
-	 * 
-	 * @param	Input source
-	 * @param	Unique index for source provided by run(). Same source will
-	 * 			always have same idx. Implementations may choose to ignore it.
-	 * @return	True/false if feature was found. Used to build adjacency matrix.
-	 */
-	virtual bool findFeatures(ftl::rgbd::Source* source, size_t idx)=0;
-
-	std::vector<std::vector<bool>> visibility_; /*< Adjacency matrix for sources (feature visibility). */
-
-private:
-	std::optional<std::string> target_source_; /*< Reference coordinate system for transformations. */
-	std::vector<ftl::rgbd::Source*> sources_;
-};
-
-/**
- * @brief	Registration using chessboard calibration pattern
- * 
- * Parameters from configuration:
- * 
- * 		patternsize: required
- * 			Chessboard pattern size, inner corners.
- * 
- * 		maxerror: default +inf
- * 			Maximum allowed error value for pattern detection. MSE error between
- * 			estimated plane and points captured from input.
- * 
- * 		delay:	default 500
- * 			Milliseconds between captured images.
- * 
- * 		chain: default false
- * 			Enabling allows camera chaining. In chain mode, pattern is not
- * 			required to be visible in every source. In default (chain: false)
- * 			mode, pattern visibility is required for every source.
- * 
- * 		iter: default 10
- * 			Number of iterations for capturing calibration samples. In
- * 			non-chaining mode, each iteration consists of images where patterns
- * 			were detected on every input. In chaining mode each iteration only
- * 			requires camera visibility to be connected.
- */
-class ChessboardRegistration : public Registration {
-public:
-	explicit ChessboardRegistration(nlohmann::json &config);
-	/** 
-	 * @brief	Creates new ChessboardRegistration or ChessboardRegistrationChain
-	 * 			object depending on chain option in config. User of the method
-	 * 			needs to free the memory.
-	 */
-	static ChessboardRegistration* create(nlohmann::json &config);
-
-	void run() override;
-	bool findTransformations(std::vector<Eigen::Matrix4f> &data) override;
-
-protected:
-	bool findFeatures(ftl::rgbd::Source* source, size_t idx) override;
-	bool processData() override;
-	cv::Size pattern_size_;
-	std::vector<std::vector<std::optional<pcl::PointCloud<pcl::PointXYZ>::Ptr>>> data_;
-	std::vector<Eigen::Matrix4f> T_;
-	float error_threshold_;
-	uint delay_;
-	uint iter_;
-	uint iter_remaining_;
-};
-
-/**
- * @brief Chain registration. Finds visibility and then runs registration.
- */
-class ChessboardRegistrationChain : public ChessboardRegistration {
-public:
-	explicit ChessboardRegistrationChain(nlohmann::json &config);
-	
-	bool findTransformations(std::vector<Eigen::Matrix4f> &data) override;
-
-protected:
-	bool processData() override;
-	std::vector<Eigen::Matrix4f> T_;
-	std::vector<std::vector<std::pair<size_t, size_t>>> edges_;
-};
-
 }
 }
 
-#endif  // HAVE_PCL
 #endif  // _FTL_RECONSTRUCT_REGISTRATION_HPP_
\ No newline at end of file
diff --git a/applications/reconstruct/src/integrators.cu b/applications/reconstruct/src/integrators.cu
index 326c3dd9a..d23fada99 100644
--- a/applications/reconstruct/src/integrators.cu
+++ b/applications/reconstruct/src/integrators.cu
@@ -39,7 +39,7 @@ __device__ float colourDistance(const uchar4 &c1, const uchar3 &c2) {
 __device__ bool colordiff(const uchar4 &pa, const uchar3 &pb, float epsilon) {
 	float x_2 = pb.x * pb.x + pb.y * pb.y + pb.z * pb.z;
 	float v_2 = pa.x * pa.x + pa.y * pa.y + pa.z * pa.z;
-	float xv_2 = pow(pb.x * pa.x + pb.y * pa.y + pb.z * pa.z, 2);
+	float xv_2 = powf(float(pb.x * pa.x + pb.y * pa.y + pb.z * pa.z), 2.0f);
 	float p_2 = xv_2 / v_2;
 	return sqrt(x_2 - p_2) < epsilon;
 }
diff --git a/applications/reconstruct/src/main.cpp b/applications/reconstruct/src/main.cpp
index 97ff62de6..01745d2dd 100644
--- a/applications/reconstruct/src/main.cpp
+++ b/applications/reconstruct/src/main.cpp
@@ -114,7 +114,10 @@ static void run(ftl::Configurable *root) {
 
 	bool busy = false;
 
+	group.setName("ReconGroup");
 	group.sync([scene,splat,virt,&busy,&slave](ftl::rgbd::FrameSet &fs) -> bool {
+		cudaSetDevice(scene->getCUDADevice());
+		
 		if (busy) {
 			LOG(INFO) << "Group frameset dropped: " << fs.timestamp;
 			return true;
@@ -129,6 +132,7 @@ static void run(ftl::Configurable *root) {
 		int64_t ts = fs.timestamp;
 
 		ftl::pool.push([scene,splat,virt,&busy,ts,&slave](int id) {
+			cudaSetDevice(scene->getCUDADevice());
 			// TODO: Release frameset here...
 			cudaSafeCall(cudaStreamSynchronize(scene->getIntegrationStream()));
 
diff --git a/applications/reconstruct/src/mls.cu b/applications/reconstruct/src/mls.cu
index 71201a017..4de8a07db 100644
--- a/applications/reconstruct/src/mls.cu
+++ b/applications/reconstruct/src/mls.cu
@@ -27,7 +27,7 @@ extern __constant__ HashParams c_hashParams;
  __device__ float colordiffFloat(const uchar4 &pa, const uchar4 &pb) {
 	const float x_2 = pb.x * pb.x + pb.y * pb.y + pb.z * pb.z;
 	const float v_2 = pa.x * pa.x + pa.y * pa.y + pa.z * pa.z;
-	const float xv_2 = pow(pb.x * pa.x + pb.y * pa.y + pb.z * pa.z, 2);
+	const float xv_2 = powf(float(pb.x * pa.x + pb.y * pa.y + pb.z * pa.z), 2.0f);
 	const float p_2 = xv_2 / v_2;
 	return sqrt(x_2 - p_2);
 }
diff --git a/applications/reconstruct/src/registration.cpp b/applications/reconstruct/src/registration.cpp
index 5b828242e..dab523544 100644
--- a/applications/reconstruct/src/registration.cpp
+++ b/applications/reconstruct/src/registration.cpp
@@ -1,26 +1,8 @@
 #include <ftl/registration.hpp>
-
-#ifdef HAVE_PCL
-
+#include <fstream>
 #define LOGURU_WITH_STREAMS 1
 #include <loguru.hpp>
-#include <pcl/common/transforms.h>
-
-#include <pcl/registration/transformation_estimation_svd.h>
-#include <pcl/registration/transformation_estimation_svd_scale.h>
-
-#include <pcl/segmentation/sac_segmentation.h>
-#include <pcl/sample_consensus/method_types.h>
-#include <pcl/sample_consensus/model_types.h>
-#include <pcl/filters/project_inliers.h>
-#include <pcl/ModelCoefficients.h>
-
-#include <pcl/io/pcd_io.h>
 
-#include <pcl/registration/transformation_validation.h>
-#include <pcl/registration/transformation_validation_euclidean.h>
-#include <pcl/common/geometry.h>
-//#include <pcl/registration/icp_nl.h>
 
 namespace ftl {
 namespace registration {
@@ -34,10 +16,6 @@ using std::pair;
 using std::map;
 using std::optional;
 
-using pcl::PointCloud;
-using pcl::PointXYZ;
-using pcl::PointXYZRGB;
-
 using cv::Mat;
 using Eigen::Matrix4f;
 using Eigen::Matrix4d;
@@ -86,489 +64,6 @@ bool saveTransformations(const string &path, map<string, Matrix4d> &data) {
 	return true;
 }
 
-// todo template: fitPlane<typename T>(PointCloud<T> cloud_in, PointCloud<T> cloud_out)
-//
-// Fit calibration pattern into plane using RANSAC + project points
-//
-pcl::ModelCoefficients::Ptr fitPlane(PointCloud<PointXYZ>::Ptr cloud_in, float distance_threshold=5.0) {
-	// TODO: include pattern in model (find best alignment of found points and return transformed reference?)
-	
-	pcl::ModelCoefficients::Ptr coefficients(new pcl::ModelCoefficients);
-	pcl::PointIndices::Ptr inliers(new pcl::PointIndices);
-	
-	// Estimate plane with RANSAC
-	pcl::SACSegmentation<PointXYZ> seg;
-	
-	seg.setOptimizeCoefficients(true);
-	seg.setModelType(pcl::SACMODEL_PLANE);
-	seg.setMethodType(pcl::SAC_RANSAC);
-	seg.setDistanceThreshold(distance_threshold);
-	seg.setInputCloud(cloud_in);
-	seg.segment(*inliers, *coefficients);
-	
-	return coefficients;
-}
-
-float fitPlaneError(PointCloud<PointXYZ>::Ptr cloud_in, float distance_threshold=5.0) {
-	auto coefficients = fitPlane(cloud_in, distance_threshold);
-	PointCloud<PointXYZ> cloud_proj;
-	
-	// Project points into plane
-	pcl::ProjectInliers<PointXYZ> proj;
-	proj.setModelType(pcl::SACMODEL_PLANE);
-	proj.setInputCloud(cloud_in);
-	proj.setModelCoefficients(coefficients);
-	proj.filter(cloud_proj); 
-	
-	CHECK(cloud_in->size() == cloud_proj.size());
-	
-	// todo: which error score is suitable? (using MSE)
-	float score = 0.0;
-	for(size_t i = 0; i < cloud_proj.size(); i++) {
-		float d = pcl::geometry::distance(cloud_in->points[i], cloud_proj.points[i]);
-		score += d * d;
-	}
-	
-	return (score / cloud_proj.size()) * 10000000.0f;
-}
-
-//template<typename T = PointXYZ> typename
-PointCloud<PointXYZ>::Ptr cornersToPointCloud(const vector<cv::Point2f> &corners, const Mat &depth, const Camera &p) {
-	
-	int corners_len = corners.size();
-	vector<cv::Vec3f> points(corners_len);
-
-	const double CX = p.cx;
-	const double CY = p.cy;
-	const double FX = p.fx;
-	const double FY = p.fy;
-	
-	// Output point cloud
-	PointCloud<PointXYZ>::Ptr cloud(new PointCloud<PointXYZ>);
-	cloud->width = corners_len;
-	cloud->height = 1;
-	
-	// Follows cv::reprojectImageTo3D(..)
-	// https://github.com/opencv/opencv/blob/371bba8f54560b374fbcd47e7e02f015ac4969ad/modules/calib3d/src/calibration.cpp#L2998
-	// documentation suggests using cv::perspectiveTransform(...) with sparse set of points
-	
-	for (int i = 0; i < corners_len; i++) {
-		double x = corners[i].x;
-		double y = corners[i].y;
-		double d = depth.at<float>((int) y, (int) x); // * 1000.0f; // todo: better estimation
-		
-		//cv::Vec4d homg_pt = Q_ * cv::Vec4d(x, y, d, 1.0);
-		//cv::Vec3d p = cv::Vec3d(homg_pt.val) / homg_pt[3];
-
-		PointXYZ point;
-		point.x = (((double)x + CX) / FX) * d; // / 1000.0f;
-		point.y = (((double)y + CY) / FY) * d; // / 1000.0f;
-		point.z = d;
-		
-		cloud->push_back(point);
-	}
-	
-	return cloud;
-}
-
-bool findChessboardCorners(Mat &rgb, const Mat &depth, const Camera &p, const cv::Size pattern_size, PointCloud<PointXYZ>::Ptr &out, float error_threshold) {
-	vector<cv::Point2f> corners(pattern_size.width * pattern_size.height);
-
-#if CV_VERSION_MAJOR >= 4
-	bool retval = cv::findChessboardCornersSB(rgb, pattern_size, corners);
-#else
-	bool retval = cv::findChessboardCorners(rgb, pattern_size, corners);
-#endif
-
-	cv::drawChessboardCorners(rgb, pattern_size, Mat(corners), retval);
-	if (!retval) { return false; }
-	
-	auto corners_cloud = cornersToPointCloud(corners, depth, p);
-	// simple check that the values make some sense
-	float error = fitPlaneError(corners_cloud, error_threshold); // should use different parameter?
-	LOG(INFO) << "MSE against estimated plane: " << error;
-	
-	if (error > error_threshold) {
-		LOG(WARNING) << "too high error score for calibration pattern, threshold " << error_threshold;
-		return false;
-	}
-	
-	if (out) { *out += *corners_cloud; } // if cloud is valid, add the points
-	else { out = corners_cloud; }
-	return true;
-}
-
-Eigen::Matrix4f findTransformation(vector<PointCloud<PointXYZ>::Ptr> clouds_source, vector<PointCloud<PointXYZ>::Ptr> clouds_target) {
-	size_t n_clouds = clouds_source.size();
-	
-	Eigen::Matrix4f T, T_tmp, T_new;
-	T.setIdentity();
-	
-	if ((clouds_source.size() != clouds_target.size()) || (n_clouds == 0)) {
-		LOG(ERROR) << "Input vectors have invalid sizes: clouds_source " << clouds_source.size()
-					<< ", clouds_target " << clouds_target.size() << ", transformation can not be estimated";
-		
-		return T; // identity
-	}
-	
-	// corresponding points have same indices (!!!)
-	int n_points = clouds_source[0]->width * clouds_source[0]->height;
-	vector<int> idx(n_points);
-	for (int i = 0; i < n_points; i++) { idx[i] = i; }
-	
-	pcl::registration::TransformationValidationEuclidean<PointXYZ, PointXYZ> validate;
-	pcl::registration::TransformationEstimationSVD<PointXYZ,PointXYZ> svd;
-	
-	double score_prev = std::numeric_limits<float>::max();
-	
-	for (size_t i = 0; i < n_clouds; ++i) {
-		PointCloud<PointXYZ> source;
-		PointCloud<PointXYZ> target = *clouds_target[i];
-		
-		pcl::transformPointCloud(*clouds_source[i], source, T);
-		svd.estimateRigidTransformation(source, idx, target, idx, T_new);
-		
-		// calculate new transformation
-		T_tmp = T_new * T;
-		
-		// score new transformation
-		double score = 0.0;
-		for (size_t j = 0; j < n_clouds; ++j) {
-			score += validate.validateTransformation(clouds_source[j], clouds_target[j], T_tmp); // CHECK Is use of T here a mistake??
-		}
-		score /= n_clouds;
-		
-		// if score doesn't improve, do not use as T, otherwise update T and score
-		if (score < score_prev) {
-			T = T_tmp;
-			score_prev = score;
-		}
-		
-		LOG(INFO) << "Validation score: " << score;
-	}
-	
-	return T;
-}
-
-Registration::Registration(nlohmann::json &config) :
-	ftl::Configurable(config) {
-	target_source_ = get<string>("targetsource");
-	if (!target_source_) {
-		LOG(WARNING) << "targetsource not set";
-	}
-}
-
-Source* Registration::getSource(size_t idx) {
-	return sources_[idx];
-}
-
-bool Registration::isTargetSourceSet() {
-	return (bool) target_source_;
-}
-
-bool Registration::isTargetSourceFound() {
-	for (Source* source : sources_ ) {
-		if (isTargetSource(source)) return true;
-	}
-	return false;
-}
-
-bool Registration::isTargetSource(Source *source) {
-	if (target_source_) { return source->getID() == *target_source_; }
-	return false;
-}
-
-bool Registration::isTargetSource(size_t idx) {
-	if (idx >= sources_.size()) return false; // assert
-	return isTargetSource(sources_[idx]);
-}
-
-size_t Registration::getTargetSourceIdx() {
-	if (!target_source_) return 0;
-	for (size_t idx = 0; idx < sources_.size(); ++idx) {
-		if (isTargetSource(sources_[idx])) return idx;
-	}
-
-	return 0;
-}
-
-void Registration::addSource(Source *source) {
-	// TODO: check that source is not already included
-	sources_.push_back(source);
-}
-
-/**
- * @param	adjacency matrix
- * @param	index of starting vertex
- * @param	(out) edges connecting each level
- * @returns	true if graph connected (all vertices visited), otherwise false
- * 
- * Breadth First Search
- */
-bool isConnected(vector<vector<bool>> matrix, size_t start_idx, vector<vector<pair<size_t, size_t>>> &edges) {
-vector<bool> visited(matrix.size(), false);
-	DCHECK(start_idx < matrix.size());
-
-	edges.clear();
-	vector<size_t> level { start_idx };
-
-	visited[start_idx] = true;
-	size_t visited_count = 1;
-	
-	while(level.size() != 0) {
-		vector<size_t> level_prev = level;
-		level = {};
-
-		vector<pair<size_t, size_t>> new_edges;
-
-		for (size_t current : level_prev) {
-		for (size_t i = 0; i < matrix.size(); ++i) {
-			if (matrix[current][i] && !visited[i]) {
-				visited[i] = true;
-				visited_count += 1;
-				level.push_back(i);
-				// could also save each level's vertices
-
-				new_edges.push_back(pair(current, i));
-			}
-		}}
-		if (new_edges.size() > 0) edges.push_back(new_edges);
-	}
-
-	return visited_count == matrix.size();
-}
-
-bool isConnected(vector<vector<bool>> matrix, size_t start_idx = 0) {
-	vector<vector<pair<size_t, size_t>>> edges;
-	return isConnected(matrix, start_idx, edges);
-}
-
-/**
- * @param	Adjacency matrix
- * @returns	Vector containing degree of each vertex
-*/
-vector<uint> verticleDegrees(vector<vector<bool>> matrix) {
-	vector<uint> res(matrix.size(), 0);
-	for (size_t i = 0; i < matrix.size(); ++i) {
-	for (size_t j = 0; j < matrix.size(); ++j) {
-		if (matrix[i][j]) res[i] = res[i] + 1;
-	}}
-	return res;
-}
-
-bool Registration::connectedVisibility() {
-	return isConnected(visibility_, getTargetSourceIdx());
-}
-
-void Registration::resetVisibility() {
-	visibility_ = vector(sources_.size(), vector<bool>(sources_.size(), false));
-}
-
-void Registration::run() {
-	resetVisibility();
-
-	do {
-		vector<bool> visible(sources_.size(), false);
-
-		for (size_t i = 0; i < sources_.size(); ++i) {
-			bool retval = findFeatures(sources_[i], i);
-			visible[i] = retval;
-		}
-
-		for (size_t i = 0; i < visible.size(); ++i) {
-		for (size_t j = 0; j < visible.size(); ++j) {
-			bool val = visible[i] && visible[j];
-			visibility_[i][j] = visibility_[i][j] || val;
-			visibility_[j][i] = visibility_[j][i] || val;
-		}}
-	}
-	while(processData());
-}
-
-bool Registration::findTransformations(map<string, Matrix4f> &data) {
-	vector<Matrix4f> T;
-	data.clear();
-
-	if (!findTransformations(T)) return false;
-	for (size_t i = 0; i < sources_.size(); ++i) {
-		data[sources_[i]->getURI()] = T[i];
-	}
-	return true;
-}
-
-ChessboardRegistration* ChessboardRegistration::create(nlohmann::json &config) {
-	if (config.value<bool>("chain", false)) {
-		return new ChessboardRegistrationChain(config);
-	}
-	else {
-		return new ChessboardRegistration(config);
-	}
-}
-
-ChessboardRegistration::ChessboardRegistration(nlohmann::json &config) :
-	Registration(config) {
-	
-	auto patternsize = get<vector<int>>("patternsize");
-	if (!patternsize) { LOG(FATAL) << "Registration run enabled but pattern size not set"; }
-	pattern_size_ = cv::Size((*patternsize)[0], (*patternsize)[1]);
-	
-	auto maxerror = get<float>("maxerror");
-	if (!maxerror) { LOG(WARNING) << "maxerror not set"; }
-	auto delay = get<int>("delay");
-	if (!delay) { LOG(INFO) << "delay not set in configuration"; }
-	auto iter = get<int>("iterations");
-	if (!iter) { LOG(INFO) << "iterations not set in configuration"; }
-	auto chain = get<bool>("chain");
-	if (!chain) { LOG(INFO) << "input chaining disabled"; }
-	else { LOG(INFO) << "Input chaining enabled"; }
-
-	error_threshold_ = maxerror ? *maxerror : std::numeric_limits<float>::infinity();
-	iter_ = iter ? *iter : 10;
-	delay_ = delay ? *delay : 50;
-}
-
-void ChessboardRegistration::run() {
-	if (!isTargetSourceFound()) {
-		LOG(WARNING) << "targetsource not found in sources";
-	}
-
-	if (data_.size() != getSourcesCount()) {
-		data_ = vector<vector<optional<PointCloud<PointXYZ>::Ptr>>>(getSourcesCount());
-	}
-	iter_remaining_ = iter_;
-
-	// TODO: Move GUI elsewhere. Also applies to processData() and findFeatures()
-	for (size_t i = 0; i < getSourcesCount(); ++i) { 
-		cv::namedWindow("Registration: " + getSource(i)->getID(),
-						cv::WINDOW_KEEPRATIO|cv::WINDOW_NORMAL);
-	}
-
-	Registration::run();
-
-	for (size_t i = 0; i < getSourcesCount(); ++i) { 
-		cv::destroyWindow("Registration: " + getSource(i)->getID());
-	}
-}
-
-bool ChessboardRegistration::findFeatures(Source *source, size_t idx) {
-	optional<PointCloud<PointXYZ>::Ptr> result;
-	PointCloud<PointXYZ>::Ptr cloud(new PointCloud<PointXYZ>);
-
-	Mat rgb, depth;
-	source->grab();
-	source->getFrames(rgb, depth);
-
-	bool retval = findChessboardCorners(rgb, depth, source->parameters(), pattern_size_, cloud, error_threshold_);
-	if (retval) {
-		result.emplace(cloud);
-	}
-	data_[idx].push_back(result);
-	
-	cv::imshow("Registration: " + source->getID(), rgb);
-
-	return retval;
-}
-
-bool ChessboardRegistration::processData() {
-	bool retval = connectedVisibility();
-	resetVisibility();
-
-	if (retval) {
-		iter_remaining_--;
-	}
-	else{
-		LOG(INFO) << "Pattern not visible in all inputs";
-		for (auto &sample : data_) { sample.pop_back(); }
-	}
-
-	//std::this_thread::sleep_for(std::chrono::milliseconds(delay_));
-	cv::waitKey(delay_); // OpenCV GUI doesn't show otherwise
-
-	return iter_remaining_ > 0;
-}
-
-bool ChessboardRegistration::findTransformations(vector<Matrix4f> &data) {
-	data.clear();
-	vector<bool> status(getSourcesCount(), false);
-	size_t idx_target = getTargetSourceIdx();
-
-	for (size_t idx = 0; idx < getSourcesCount(); ++idx) {
-		Matrix4f T;
-		if (idx == idx_target) {
-			T.setIdentity(); 
-		}
-		else {
-			vector<PointCloud<PointXYZ>::Ptr> d;
-			vector<PointCloud<PointXYZ>::Ptr> d_target;
-			d.reserve(iter_);
-			d_target.reserve(iter_);
-			
-			for (size_t i = 0; i < iter_; ++i) {
-				auto val = data_[idx][i];
-				auto val_target = data_[idx_target][i];
-				if (val && val_target) {
-					d.push_back(*val);
-					d_target.push_back(*val_target);
-				}
-			}
-			T = findTransformation(d, d_target); 
-		}
-		data.push_back(T);
-	}
-	return true;
-}
-
-ChessboardRegistrationChain::ChessboardRegistrationChain(nlohmann::json &config) :
-							ChessboardRegistration(config) {
-		error_threshold_ = std::numeric_limits<float>::infinity();
-}
-
-bool ChessboardRegistrationChain::processData() {
-	for (auto &sample : data_ ) { sample.clear(); }
-	bool retval = isConnected(visibility_, getTargetSourceIdx(), edges_);
-	
-	if (retval) {
-		LOG(INFO) << "Chain complete, depth: " << edges_.size();
-		return false;
-	}
-	else{
-		LOG(5) << "Chain not complete ";
-	}
-
-	return true;
-}
-
-bool ChessboardRegistrationChain::findTransformations(vector<Matrix4f> &data) {
-	// TODO	Change to group registration: register all sources which have visibility
-	//		to the target source in chain.
-
-	LOG(INFO) << "Running pairwise registration";
-	data = vector<Matrix4f>(getSourcesCount(), Matrix4f::Identity());
-
-	for (vector<pair<size_t, size_t>> level : edges_) {
-		for (pair<size_t, size_t> edge : level) {
-			LOG(INFO) 	<< "Registering source "
-						<< getSource(edge.second)->getID() << " to source"
-						<< getSource(edge.first)->getID();
-			
-			nlohmann::json conf(getConfig());
-			conf["targetsource"] = getSource(edge.first)->getID();
-			conf["chain"] = false;
-
-			vector<Matrix4f> result;
-			ChessboardRegistration reg(conf);
-			reg.addSource(getSource(edge.first));
-			reg.addSource(getSource(edge.second));
-			reg.run();
-			if (!reg.findTransformations(result)) { return false; }
-			data[edge.second] = data[edge.first] * result[1];
-		}
-	}
-	
-	return true;
-}
 
 } // namespace registration
 } // namespace ftl
-
-#endif // HAVE_PCL
\ No newline at end of file
diff --git a/components/codecs/CMakeLists.txt b/components/codecs/CMakeLists.txt
new file mode 100644
index 000000000..f951f94a6
--- /dev/null
+++ b/components/codecs/CMakeLists.txt
@@ -0,0 +1,26 @@
+set(CODECSRC
+	src/bitrates.cpp
+	src/encoder.cpp
+	src/decoder.cpp
+	src/opencv_encoder.cpp
+	src/opencv_decoder.cpp
+	src/generate.cpp
+)
+
+if (HAVE_NVPIPE)
+	list(APPEND CODECSRC src/nvpipe_encoder.cpp)
+	list(APPEND CODECSRC src/nvpipe_decoder.cpp)
+endif()
+
+add_library(ftlcodecs ${CODECSRC})
+
+target_include_directories(ftlcodecs PUBLIC
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+	$<INSTALL_INTERFACE:include>
+	PRIVATE src)
+
+#target_include_directories(cv-node PUBLIC ${PROJECT_SOURCE_DIR}/include)
+target_link_libraries(ftlcodecs ftlcommon ${OpenCV_LIBS} ${CUDA_LIBRARIES} Eigen3::Eigen nvpipe)
+
+add_subdirectory(test)
+
diff --git a/components/codecs/README.md b/components/codecs/README.md
new file mode 100644
index 000000000..e69de29bb
diff --git a/components/codecs/include/ftl/codecs/bitrates.hpp b/components/codecs/include/ftl/codecs/bitrates.hpp
new file mode 100644
index 000000000..19572daa5
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/bitrates.hpp
@@ -0,0 +1,118 @@
+#ifndef _FTL_CODECS_BITRATES_HPP_
+#define _FTL_CODECS_BITRATES_HPP_
+
+#include <cstdint>
+#include <msgpack.hpp>
+
+namespace ftl {
+namespace codecs {
+
+/**
+ * Compression format used.
+ */
+enum struct codec_t : uint8_t {
+	JPG = 0,
+	PNG,
+    H264,
+    HEVC  // H265
+};
+
+/**
+ * Resolution of encoding.
+ */
+enum struct definition_t : uint8_t {
+	UHD8k = 0,
+	UHD4k = 1,
+	HD1080 = 2,
+	HD720 = 3,
+	SD576 = 4,
+	SD480 = 5,
+	LD360 = 6,
+	Any = 7
+};
+
+/**
+ * Get width in pixels of definition.
+ */
+int getWidth(definition_t);
+
+/**
+ * Get height in pixels of definition.
+ */
+int getHeight(definition_t);
+
+/**
+ * General indication of desired quality. Exact bitrate numbers depends also
+ * upon chosen definition and codec.
+ */
+enum struct bitrate_t {
+	High,
+	Standard,
+	Low
+};
+
+/**
+ * Pre-specified definition and quality levels for encoding where kPreset0 is
+ * the best quality and kPreset9 is the worst. The use of presets is useful for
+ * adaptive bitrate scenarios where the numbers are increased or decreased.
+ */
+typedef uint8_t preset_t;
+static const preset_t kPreset0 = 0;
+static const preset_t kPreset1 = 1;
+static const preset_t kPreset2 = 2;
+static const preset_t kPreset3 = 3;
+static const preset_t kPreset4 = 4;
+static const preset_t kPreset5 = 5;
+static const preset_t kPreset6 = 6;
+static const preset_t kPreset7 = 7;
+static const preset_t kPreset8 = 8;
+static const preset_t kPreset9 = 9;
+static const preset_t kPresetBest = 0;
+static const preset_t kPresetWorst = 9;
+static const preset_t kPresetLQThreshold = 4;
+
+/**
+ * Represents the details of each preset codec configuration.
+ */
+struct CodecPreset {
+	definition_t colour_res;
+	definition_t depth_res;
+	bitrate_t colour_qual;
+	bitrate_t depth_qual;
+};
+
+/**
+ * Get preset details structure from preset number.
+ */
+const CodecPreset &getPreset(preset_t);
+
+/**
+ * Get preset based upon a requested definition. If multiple presets match then
+ * the highest quality one is returned.
+ */
+const CodecPreset &getPreset(definition_t, definition_t);
+
+/**
+ * Get preset based upon a requested definition for colour channel.
+ * If multiple presets match then the highest quality one is returned.
+ */
+const CodecPreset &getPreset(definition_t);
+
+/**
+ * Get the preset id nearest to requested definition for colour and depth.
+ */
+preset_t findPreset(definition_t, definition_t);
+
+/**
+ * Get the preset id nearest to requested colour definition. If multiple presets
+ * match then return highest quality.
+ */
+preset_t findPreset(definition_t);
+
+}
+}
+
+MSGPACK_ADD_ENUM(ftl::codecs::codec_t);
+MSGPACK_ADD_ENUM(ftl::codecs::definition_t);
+
+#endif  // _FTL_CODECS_BITRATES_HPP_
diff --git a/components/codecs/include/ftl/codecs/decoder.hpp b/components/codecs/include/ftl/codecs/decoder.hpp
new file mode 100644
index 000000000..e6883680f
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/decoder.hpp
@@ -0,0 +1,46 @@
+#ifndef _FTL_CODECS_DECODER_HPP_
+#define _FTL_CODECS_DECODER_HPP_
+
+#include <opencv2/opencv.hpp>
+#include <opencv2/core/cuda.hpp>
+
+#include <ftl/codecs/packet.hpp>
+
+
+namespace ftl {
+namespace codecs {
+
+class Decoder;
+
+/**
+ * Allocate a decoder that can handle the received packet.
+ */
+Decoder *allocateDecoder(const ftl::codecs::Packet &);
+
+/**
+ * Release a decoder to be reused by some other stream.
+ */
+void free(Decoder *&e);
+
+/**
+ * An abstract interface for a frame decoder. An implementation of this class
+ * will take codec packets and reconstruct an image or partial image into a
+ * specified OpenCV Mat. It is not the job of the decoder to check when a frame
+ * is completed, the user of the decoder should check the packet block number
+ * and total to ensure all packets are received for a given frame. The decoder
+ * is threadsafe.
+ */
+class Decoder {
+	public:
+	Decoder() {};
+	virtual ~Decoder() {};
+
+	virtual bool decode(const ftl::codecs::Packet &pkt, cv::Mat &out)=0;
+
+	virtual bool accepts(const ftl::codecs::Packet &)=0;
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_DECODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/encoder.hpp b/components/codecs/include/ftl/codecs/encoder.hpp
new file mode 100644
index 000000000..4adeb4b0d
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/encoder.hpp
@@ -0,0 +1,98 @@
+#ifndef _FTL_CODECS_ENCODER_HPP_
+#define _FTL_CODECS_ENCODER_HPP_
+
+#include <opencv2/opencv.hpp>
+#include <opencv2/core/cuda.hpp>
+
+#include <ftl/codecs/bitrates.hpp>
+#include <ftl/codecs/packet.hpp>
+
+namespace ftl {
+namespace codecs {
+
+static const unsigned int kVideoBufferSize = 10*1024*1024;
+
+class Encoder;
+
+enum class device_t {
+	Any = 0,
+	Hardware,
+	Software,
+	NVIDIA,
+	x265,
+	OpenCV
+};
+
+/**
+ * Allocate a high quality encoder. This is a hardware encoding device if
+ * available, or otherwise a CPU encoder. There are a restricted number of
+ * high quality encoders due to system resources. A nullptr is returned if no
+ * encoders are available, however, it will return a low quality encoder if no
+ * high quality encoders are available.
+ */
+Encoder *allocateEncoder(
+		ftl::codecs::definition_t maxdef=ftl::codecs::definition_t::HD1080,
+		ftl::codecs::device_t dev=ftl::codecs::device_t::Any);
+
+/**
+ * Release an encoder to be reused by some other stream.
+ */
+void free(Encoder *&e);
+
+/**
+ * Abstract encoder interface to be implemented. Anything implementing this will
+ * convert an OpenCV Mat or GpuMat into a compressed byte array of some form.
+ */
+class Encoder {
+    public:
+    friend Encoder *allocateEncoder(ftl::codecs::definition_t,
+			ftl::codecs::device_t);
+    friend void free(Encoder *&);
+
+    public:
+    Encoder(ftl::codecs::definition_t maxdef,
+			ftl::codecs::definition_t mindef,
+			ftl::codecs::device_t dev);
+    virtual ~Encoder();
+
+	/**
+	 * Wrapper encode to allow use of presets.
+	 */
+	virtual bool encode(const cv::Mat &in, ftl::codecs::preset_t preset,
+			const std::function<void(const ftl::codecs::Packet&)> &cb);
+
+	/**
+	 * Encode a frame at specified preset and call a callback function for each
+	 * block as it is encoded. The callback may be called only once with the
+	 * entire frame or it may be called many times from many threads with
+	 * partial blocks of a frame. Each packet should be sent over the network
+	 * to all listening clients.
+	 * 
+	 * @param in An OpenCV image of the frame to compress
+	 * @param preset Codec preset for resolution and quality
+	 * @param iframe Full frame if true, else might be a delta frame
+	 * @param cb Callback containing compressed data
+	 * @return True if succeeded with encoding.
+	 */
+    virtual bool encode(
+			const cv::Mat &in,
+			ftl::codecs::definition_t definition,
+			ftl::codecs::bitrate_t bitrate,
+			const std::function<void(const ftl::codecs::Packet&)> &cb)=0;
+
+	// TODO: Eventually, use GPU memory directly since some encoders can support this
+    //virtual bool encode(const cv::cuda::GpuMat &in, std::vector<uint8_t> &out, bitrate_t bix, bool)=0;
+
+	virtual void reset() {}
+
+    protected:
+    bool available;
+	const ftl::codecs::definition_t max_definition;
+	const ftl::codecs::definition_t min_definition;
+	const ftl::codecs::device_t device;
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_ENCODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/nvpipe_decoder.hpp b/components/codecs/include/ftl/codecs/nvpipe_decoder.hpp
new file mode 100644
index 000000000..c13b26ec0
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/nvpipe_decoder.hpp
@@ -0,0 +1,31 @@
+#ifndef _FTL_CODECS_NVPIPE_DECODER_HPP_
+#define _FTL_CODECS_NVPIPE_DECODER_HPP_
+
+#include <ftl/codecs/decoder.hpp>
+#include <ftl/threads.hpp>
+
+#include <NvPipe.h>
+
+namespace ftl {
+namespace codecs {
+
+class NvPipeDecoder : public ftl::codecs::Decoder {
+	public:
+	NvPipeDecoder();
+	~NvPipeDecoder();
+
+	bool decode(const ftl::codecs::Packet &pkt, cv::Mat &out);
+
+	bool accepts(const ftl::codecs::Packet &pkt);
+
+	private:
+	NvPipe *nv_decoder_;
+	bool is_float_channel_;
+	ftl::codecs::definition_t last_definition_;
+	MUTEX mutex_;
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_NVPIPE_DECODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/nvpipe_encoder.hpp b/components/codecs/include/ftl/codecs/nvpipe_encoder.hpp
new file mode 100644
index 000000000..3f8de66cf
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/nvpipe_encoder.hpp
@@ -0,0 +1,42 @@
+#ifndef _FTL_CODECS_NVPIPE_ENCODER_HPP_
+#define _FTL_CODECS_NVPIPE_ENCODER_HPP_
+
+#include <ftl/codecs/encoder.hpp>
+#include <NvPipe.h>
+
+namespace ftl {
+namespace codecs {
+
+class NvPipeEncoder : public ftl::codecs::Encoder {
+    public:
+    NvPipeEncoder(ftl::codecs::definition_t maxdef,
+			ftl::codecs::definition_t mindef);
+    ~NvPipeEncoder();
+
+	bool encode(const cv::Mat &in, ftl::codecs::preset_t preset,
+			const std::function<void(const ftl::codecs::Packet&)> &cb) {
+		return Encoder::encode(in, preset, cb);
+	}
+
+    bool encode(const cv::Mat &in, ftl::codecs::definition_t definition, ftl::codecs::bitrate_t bitrate,
+			const std::function<void(const ftl::codecs::Packet&)>&) override;
+
+    //bool encode(const cv::cuda::GpuMat &in, std::vector<uint8_t> &out, bitrate_t bix, bool);
+
+	void reset();
+
+    private:
+    NvPipe *nvenc_;
+    definition_t current_definition_;
+    bool is_float_channel_;
+	bool was_reset_;
+
+    bool _encoderMatch(const cv::Mat &in, definition_t def);
+    bool _createEncoder(const cv::Mat &in, definition_t def, bitrate_t rate);
+	ftl::codecs::definition_t _verifiedDefinition(ftl::codecs::definition_t def, const cv::Mat &in);
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_NVPIPE_ENCODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/opencv_decoder.hpp b/components/codecs/include/ftl/codecs/opencv_decoder.hpp
new file mode 100644
index 000000000..c4ef5ab05
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/opencv_decoder.hpp
@@ -0,0 +1,22 @@
+#ifndef _FTL_CODECS_OPENCV_DECODER_HPP_
+#define _FTL_CODECS_OPENCV_DECODER_HPP_
+
+#include <ftl/codecs/decoder.hpp>
+
+namespace ftl {
+namespace codecs {
+
+class OpenCVDecoder : public ftl::codecs::Decoder {
+	public:
+	OpenCVDecoder();
+	~OpenCVDecoder();
+
+	bool decode(const ftl::codecs::Packet &pkt, cv::Mat &out);
+
+	bool accepts(const ftl::codecs::Packet &pkt);
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_OPENCV_DECODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/opencv_encoder.hpp b/components/codecs/include/ftl/codecs/opencv_encoder.hpp
new file mode 100644
index 000000000..a34f8811d
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/opencv_encoder.hpp
@@ -0,0 +1,48 @@
+#ifndef _FTL_CODECS_OPENCV_ENCODER_HPP_
+#define _FTL_CODECS_OPENCV_ENCODER_HPP_
+
+#include <ftl/codecs/encoder.hpp>
+#include <ftl/threads.hpp>
+#include <condition_variable>
+
+namespace ftl {
+namespace codecs {
+
+/**
+ * Use OpenCV imencode to encode frames as images. This codec divides each
+ * image into blocks and uses a thread per block to compress each one. It is
+ * a simplistic codec that can function at high resolution but is best used for
+ * low definition encoding due to the poor compressed data size.
+ */
+class OpenCVEncoder : public ftl::codecs::Encoder {
+    public:
+    OpenCVEncoder(ftl::codecs::definition_t maxdef,
+			ftl::codecs::definition_t mindef);
+    ~OpenCVEncoder();
+
+	bool encode(const cv::Mat &in, ftl::codecs::preset_t preset,
+			const std::function<void(const ftl::codecs::Packet&)> &cb) {
+		return Encoder::encode(in, preset, cb);
+	}
+
+    bool encode(const cv::Mat &in, ftl::codecs::definition_t definition, ftl::codecs::bitrate_t bitrate,
+			const std::function<void(const ftl::codecs::Packet&)>&) override;
+
+    //bool encode(const cv::cuda::GpuMat &in, std::vector<uint8_t> &out, bitrate_t bix, bool);
+
+	private:
+	int chunk_count_;
+	int chunk_dim_;
+	ftl::codecs::preset_t current_preset_;
+	ftl::codecs::definition_t current_definition_;
+	std::atomic<int> jobs_;
+	std::mutex job_mtx_;
+	std::condition_variable job_cv_;
+
+	bool _encodeBlock(const cv::Mat &in, ftl::codecs::Packet &pkt, ftl::codecs::bitrate_t);
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_OPENCV_ENCODER_HPP_
diff --git a/components/codecs/include/ftl/codecs/packet.hpp b/components/codecs/include/ftl/codecs/packet.hpp
new file mode 100644
index 000000000..98e46a601
--- /dev/null
+++ b/components/codecs/include/ftl/codecs/packet.hpp
@@ -0,0 +1,44 @@
+#ifndef _FTL_CODECS_PACKET_HPP_
+#define _FTL_CODECS_PACKET_HPP_
+
+#include <cstdint>
+#include <vector>
+#include <ftl/codecs/bitrates.hpp>
+
+#include <msgpack.hpp>
+
+namespace ftl {
+namespace codecs {
+
+/**
+ * A single network packet for the compressed video stream. It includes the raw
+ * data along with any block metadata required to reconstruct. The underlying
+ * codec may use its own blocks and packets, in which case this is essentially
+ * an empty wrapper around that. It is used in the encoding callback.
+ */
+struct Packet {
+	ftl::codecs::codec_t codec;
+	ftl::codecs::definition_t definition;
+	uint8_t block_total;	// Packets expected per frame
+	uint8_t block_number; 	// This packets number within a frame
+	std::vector<uint8_t> data;
+
+	MSGPACK_DEFINE(codec, definition, block_total, block_number, data);
+};
+
+/**
+ * Add timestamp and channel information to a raw encoded frame packet. This
+ * allows the packet to be located within a larger stream and should be sent
+ * or included before a frame packet structure.
+ */
+struct StreamPacket {
+	int64_t timestamp;
+	uint8_t channel;  // first bit = channel, second bit indicates second channel being sent
+
+	MSGPACK_DEFINE(timestamp, channel);
+};
+
+}
+}
+
+#endif  // _FTL_CODECS_PACKET_HPP_
diff --git a/components/codecs/src/bitrates.cpp b/components/codecs/src/bitrates.cpp
new file mode 100644
index 000000000..519c86712
--- /dev/null
+++ b/components/codecs/src/bitrates.cpp
@@ -0,0 +1,53 @@
+
+#include <ftl/codecs/bitrates.hpp>
+#include <cmath>
+
+using ftl::codecs::CodecPreset;
+using ftl::codecs::bitrate_t;
+using ftl::codecs::preset_t;
+using ftl::codecs::definition_t;
+using ftl::codecs::codec_t;
+
+static const CodecPreset presets[] = {
+	definition_t::HD1080, definition_t::HD1080, bitrate_t::High, bitrate_t::High,
+	definition_t::HD1080, definition_t::HD720, bitrate_t::Standard, bitrate_t::Standard,
+	definition_t::HD720, definition_t::HD720, bitrate_t::High, bitrate_t::High,
+	definition_t::HD720, definition_t::SD576, bitrate_t::Standard, bitrate_t::Standard,
+	definition_t::SD576, definition_t::SD576, bitrate_t::High, bitrate_t::High,
+	definition_t::SD576, definition_t::SD480, bitrate_t::Standard, bitrate_t::Standard,
+	definition_t::SD480, definition_t::SD480, bitrate_t::High, bitrate_t::High,
+	definition_t::SD480, definition_t::LD360, bitrate_t::Standard, bitrate_t::Standard,
+	definition_t::LD360, definition_t::LD360, bitrate_t::Standard, bitrate_t::Standard,
+	definition_t::LD360, definition_t::LD360, bitrate_t::Low, bitrate_t::Low
+};
+
+static const float kAspectRatio = 1.777778f;
+
+struct Resolution {
+	int width;
+	int height;
+};
+
+static const Resolution resolutions[] = {
+	7680, 4320,		// UHD8k
+	3840, 2160,		// UHD4k
+	1920, 1080,		// HD1080
+	1280, 720,		// HD720
+	1024, 576,		// SD576
+	854, 480,		// SD480
+	640, 360		// LD360
+};
+
+int ftl::codecs::getWidth(definition_t d) {
+	return resolutions[static_cast<int>(d)].width;
+}
+
+int ftl::codecs::getHeight(definition_t d) {
+	return resolutions[static_cast<int>(d)].height;
+}
+
+const CodecPreset &ftl::codecs::getPreset(preset_t p) {
+    if (p > kPresetWorst) return presets[kPresetWorst];
+    if (p < kPresetBest) return presets[kPresetBest];
+    return presets[p];
+};
diff --git a/components/codecs/src/decoder.cpp b/components/codecs/src/decoder.cpp
new file mode 100644
index 000000000..4cd5437d0
--- /dev/null
+++ b/components/codecs/src/decoder.cpp
@@ -0,0 +1,25 @@
+#include <ftl/codecs/decoder.hpp>
+
+#include <ftl/codecs/opencv_decoder.hpp>
+#include <ftl/codecs/nvpipe_decoder.hpp>
+
+using ftl::codecs::Decoder;
+using ftl::codecs::codec_t;
+
+Decoder *ftl::codecs::allocateDecoder(const ftl::codecs::Packet &pkt) {
+	switch(pkt.codec) {
+	case codec_t::JPG		:
+	case codec_t::PNG		: return new ftl::codecs::OpenCVDecoder;
+	case codec_t::HEVC		: return new ftl::codecs::NvPipeDecoder;
+	}
+
+	return nullptr;
+}
+
+/**
+ * Release a decoder to be reused by some other stream.
+ */
+void ftl::codecs::free(Decoder *&e) {
+	delete e;
+	e = nullptr;
+}
diff --git a/components/codecs/src/encoder.cpp b/components/codecs/src/encoder.cpp
new file mode 100644
index 000000000..3ebe40cf9
--- /dev/null
+++ b/components/codecs/src/encoder.cpp
@@ -0,0 +1,77 @@
+#include <ftl/codecs/encoder.hpp>
+#include <ftl/threads.hpp>
+
+#include <list>
+
+#include <ftl/config.h>
+#include <loguru.hpp>
+
+using ftl::codecs::Encoder;
+using ftl::codecs::bitrate_t;
+using ftl::codecs::definition_t;
+using ftl::codecs::preset_t;
+using ftl::codecs::device_t;
+using ftl::codecs::kPresetBest;
+using ftl::codecs::kPresetWorst;
+using ftl::codecs::kPresetLQThreshold;
+
+namespace ftl {
+namespace codecs {
+namespace internal {
+
+std::list<Encoder*> encoders;
+
+bool has_been_init = false;
+
+void init_encoders();
+
+}
+}
+}
+
+using namespace ftl::codecs::internal;
+
+static MUTEX mutex;
+
+Encoder *ftl::codecs::allocateEncoder(ftl::codecs::definition_t maxdef,
+		ftl::codecs::device_t dev) {
+    UNIQUE_LOCK(mutex, lk);
+	if (!has_been_init) init_encoders();
+
+	for (auto i=encoders.begin(); i!=encoders.end(); ++i) {
+		auto *e = *i;
+		if (!e->available) continue;
+		if (dev != device_t::Any && dev != e->device) continue;
+		if (maxdef != definition_t::Any && (maxdef < e->max_definition || maxdef > e->min_definition)) continue;
+		
+		e->available = false;
+		return e;
+	}
+
+	LOG(ERROR) << "No encoder found";
+	return nullptr;
+}
+
+void ftl::codecs::free(Encoder *&enc) {
+    UNIQUE_LOCK(mutex, lk);
+    enc->reset();
+	enc->available = true;
+    enc = nullptr;
+}
+
+Encoder::Encoder(definition_t maxdef, definition_t mindef, device_t dev) :
+		available(true), max_definition(maxdef), min_definition(mindef), device(dev) {
+
+}
+
+Encoder::~Encoder() {
+
+}
+
+bool Encoder::encode(const cv::Mat &in, preset_t preset,
+			const std::function<void(const ftl::codecs::Packet&)> &cb) {
+	const auto &settings = ftl::codecs::getPreset(preset);
+	const definition_t definition = (in.type() == CV_32F) ? settings.depth_res : settings.colour_res;
+	const bitrate_t bitrate = (in.type() == CV_32F) ? settings.depth_qual : settings.colour_qual;
+	return encode(in, definition, bitrate, cb);
+}
diff --git a/components/codecs/src/generate.cpp b/components/codecs/src/generate.cpp
new file mode 100644
index 000000000..b6b3c3be9
--- /dev/null
+++ b/components/codecs/src/generate.cpp
@@ -0,0 +1,45 @@
+#include <ftl/codecs/encoder.hpp>
+#include <ftl/codecs/opencv_encoder.hpp>
+#include <ftl/configurable.hpp>
+
+#include <ftl/config.h>
+#include <loguru.hpp>
+
+#ifdef HAVE_NVPIPE
+#include <ftl/codecs/nvpipe_encoder.hpp>
+#endif
+
+namespace ftl {
+namespace codecs {
+namespace internal {
+
+extern std::list<Encoder*> encoders;
+extern bool has_been_init;
+
+void fin_encoders() {
+    LOG(INFO) << "Destroying encoders...";
+    for (auto *s : encoders) delete s;
+}
+
+void init_encoders() {
+    #ifdef HAVE_NVPIPE
+    LOG(INFO) << "Adding NvPipe Encoders";
+    encoders.push_back(new ftl::codecs::NvPipeEncoder(definition_t::UHD4k, definition_t::HD720));
+    encoders.push_back(new ftl::codecs::NvPipeEncoder(definition_t::UHD4k, definition_t::HD720));
+    #endif
+
+    encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::HD1080, definition_t::HD720));
+    encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::HD1080, definition_t::HD720));
+    encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::SD576, definition_t::LD360));
+    encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::SD576, definition_t::LD360));
+	encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::SD576, definition_t::LD360));
+    encoders.push_back(new ftl::codecs::OpenCVEncoder(definition_t::SD576, definition_t::LD360));
+
+    has_been_init = true;
+
+    atexit(fin_encoders);
+}
+
+}
+}
+}
\ No newline at end of file
diff --git a/components/codecs/src/nvpipe_decoder.cpp b/components/codecs/src/nvpipe_decoder.cpp
new file mode 100644
index 000000000..cbeced55e
--- /dev/null
+++ b/components/codecs/src/nvpipe_decoder.cpp
@@ -0,0 +1,79 @@
+#include <ftl/codecs/nvpipe_decoder.hpp>
+
+#include <loguru.hpp>
+
+#include <cuda_runtime.h>
+
+using ftl::codecs::NvPipeDecoder;
+
+NvPipeDecoder::NvPipeDecoder() {
+	nv_decoder_ = nullptr;
+}
+
+NvPipeDecoder::~NvPipeDecoder() {
+	if (nv_decoder_ != nullptr) {
+		NvPipe_Destroy(nv_decoder_);
+	}
+}
+
+bool NvPipeDecoder::decode(const ftl::codecs::Packet &pkt, cv::Mat &out) {
+	cudaSetDevice(0);
+	UNIQUE_LOCK(mutex_,lk);
+	if (pkt.codec != codec_t::HEVC) return false;
+
+	bool is_float_frame = out.type() == CV_32F;
+
+	// Is the previous decoder still valid for current resolution and type?
+	if (nv_decoder_ != nullptr && (last_definition_ != pkt.definition || is_float_channel_ != is_float_frame)) {
+		NvPipe_Destroy(nv_decoder_);
+		nv_decoder_ = nullptr;
+	}
+
+	is_float_channel_ = is_float_frame;
+	last_definition_ = pkt.definition;
+
+	// Build a decoder instance of the correct kind
+	if (nv_decoder_ == nullptr) {
+		nv_decoder_ = NvPipe_CreateDecoder(
+				(is_float_frame) ? NVPIPE_UINT16 : NVPIPE_RGBA32,
+				NVPIPE_HEVC,
+				ftl::codecs::getWidth(pkt.definition),
+				ftl::codecs::getHeight(pkt.definition));
+		if (!nv_decoder_) {
+			//LOG(INFO) << "Bitrate=" << (int)bitrate << " width=" << ABRController::getColourWidth(bitrate);
+			LOG(FATAL) << "Could not create decoder: " << NvPipe_GetError(NULL);
+		} else {
+			LOG(INFO) << "Decoder created";
+		}
+	}
+
+	// TODO: (Nick) Move to member variable to prevent re-creation
+	cv::Mat tmp(cv::Size(ftl::codecs::getWidth(pkt.definition),ftl::codecs::getHeight(pkt.definition)), (is_float_frame) ? CV_16U : CV_8UC4);
+
+	int rc = NvPipe_Decode(nv_decoder_, pkt.data.data(), pkt.data.size(), tmp.data, tmp.cols, tmp.rows);
+	if (rc == 0) LOG(ERROR) << "NvPipe decode error: " << NvPipe_GetError(nv_decoder_);
+
+	if (is_float_frame) {
+		// Is the received frame the same size as requested output?
+		if (out.rows == ftl::codecs::getHeight(pkt.definition)) {
+			tmp.convertTo(out, CV_32FC1, 1.0f/1000.0f);
+		} else {
+			tmp.convertTo(tmp, CV_32FC1, 1.0f/1000.0f);
+			cv::resize(tmp, out, out.size());
+		}
+	} else {
+		// Is the received frame the same size as requested output?
+		if (out.rows == ftl::codecs::getHeight(pkt.definition)) {
+			cv::cvtColor(tmp, out, cv::COLOR_BGRA2BGR);
+		} else {
+			cv::cvtColor(tmp, tmp, cv::COLOR_BGRA2BGR);
+			cv::resize(tmp, out, out.size());
+		}
+	}
+
+	return rc > 0;
+}
+
+bool NvPipeDecoder::accepts(const ftl::codecs::Packet &pkt) {
+	return pkt.codec == codec_t::HEVC;
+}
diff --git a/components/codecs/src/nvpipe_encoder.cpp b/components/codecs/src/nvpipe_encoder.cpp
new file mode 100644
index 000000000..1060f0f2a
--- /dev/null
+++ b/components/codecs/src/nvpipe_encoder.cpp
@@ -0,0 +1,125 @@
+#include <ftl/codecs/nvpipe_encoder.hpp>
+#include <loguru.hpp>
+#include <ftl/timer.hpp>
+#include <ftl/codecs/bitrates.hpp>
+#include <cuda_runtime.h>
+
+using ftl::codecs::NvPipeEncoder;
+using ftl::codecs::bitrate_t;
+using ftl::codecs::codec_t;
+using ftl::codecs::definition_t;
+using ftl::codecs::preset_t;
+using ftl::codecs::CodecPreset;
+using ftl::codecs::Packet;
+
+NvPipeEncoder::NvPipeEncoder(definition_t maxdef,
+			definition_t mindef) : Encoder(maxdef, mindef, ftl::codecs::device_t::Hardware) {
+    nvenc_ = nullptr;
+    current_definition_ = definition_t::HD1080;
+    is_float_channel_ = false;
+	was_reset_ = false;
+}
+
+NvPipeEncoder::~NvPipeEncoder() {
+    if (nvenc_) NvPipe_Destroy(nvenc_);
+}
+
+void NvPipeEncoder::reset() {
+	was_reset_ = true;
+}
+
+/* Check preset resolution is not better than actual resolution. */
+definition_t NvPipeEncoder::_verifiedDefinition(definition_t def, const cv::Mat &in) {
+	bool is_float = in.type() == CV_32F;
+
+	int height = ftl::codecs::getHeight(def);
+
+	// FIXME: Make sure this can't go forever
+	while (height > in.rows) {
+		def = static_cast<definition_t>(int(def)+1);
+		height = ftl::codecs::getHeight(def);
+	}
+
+	return def;
+}
+
+bool NvPipeEncoder::encode(const cv::Mat &in, definition_t odefinition, bitrate_t bitrate, const std::function<void(const ftl::codecs::Packet&)> &cb) {
+    cudaSetDevice(0);
+	auto definition = _verifiedDefinition(odefinition, in);
+
+	//LOG(INFO) << "Definition: " << ftl::codecs::getWidth(definition) << "x" << ftl::codecs::getHeight(definition);
+
+    if (!_createEncoder(in, definition, bitrate)) return false;
+
+    //LOG(INFO) << "NvPipe Encode: " << int(definition) << " " << in.cols;
+
+    cv::Mat tmp;
+    if (in.type() == CV_32F) {
+		in.convertTo(tmp, CV_16UC1, 1000);
+    } else if (in.type() == CV_8UC3) {
+        cv::cvtColor(in, tmp, cv::COLOR_BGR2BGRA);
+	} else {
+		tmp = in;
+	}
+
+	Packet pkt;
+	pkt.codec = codec_t::HEVC;
+	pkt.definition = definition;
+	pkt.block_total = 1;
+	pkt.block_number = 0;
+
+    pkt.data.resize(ftl::codecs::kVideoBufferSize);
+    uint64_t cs = NvPipe_Encode(
+        nvenc_,
+        tmp.data,
+        tmp.step,
+        pkt.data.data(),
+        ftl::codecs::kVideoBufferSize,
+        in.cols,
+        in.rows,
+        was_reset_		// Force IFrame!
+    );
+    pkt.data.resize(cs);
+	was_reset_ = false;
+
+    if (cs == 0) {
+        LOG(ERROR) << "Could not encode video frame: " << NvPipe_GetError(nvenc_);
+        return false;
+    } else {
+		cb(pkt);
+        return true;
+    }
+}
+
+bool NvPipeEncoder::_encoderMatch(const cv::Mat &in, definition_t def) {
+    return ((in.type() == CV_32F && is_float_channel_) ||
+        (in.type() == CV_8UC3 && !is_float_channel_)) && current_definition_ == def;
+}
+
+bool NvPipeEncoder::_createEncoder(const cv::Mat &in, definition_t def, bitrate_t rate) {
+    if (_encoderMatch(in, def) && nvenc_) return true;
+
+    if (in.type() == CV_32F) is_float_channel_ = true;
+    else is_float_channel_ = false;
+    current_definition_ = def;
+
+    if (nvenc_) NvPipe_Destroy(nvenc_);
+    const int fps = 1000/ftl::timer::getInterval();
+    nvenc_ = NvPipe_CreateEncoder(
+        (is_float_channel_) ? NVPIPE_UINT16 : NVPIPE_RGBA32,
+        NVPIPE_HEVC,
+        (is_float_channel_) ? NVPIPE_LOSSLESS : NVPIPE_LOSSY,
+        16*1000*1000,
+        fps,				// FPS
+        ftl::codecs::getWidth(def),	// Output Width
+        ftl::codecs::getHeight(def)	// Output Height
+    );
+
+    if (!nvenc_) {
+        LOG(ERROR) << "Could not create video encoder: " << NvPipe_GetError(NULL);
+        return false;
+    } else {
+        LOG(INFO) << "NvPipe encoder created";
+        return true;
+    }
+}
diff --git a/components/codecs/src/opencv_decoder.cpp b/components/codecs/src/opencv_decoder.cpp
new file mode 100644
index 000000000..3bbd82fa2
--- /dev/null
+++ b/components/codecs/src/opencv_decoder.cpp
@@ -0,0 +1,65 @@
+#include <ftl/codecs/opencv_decoder.hpp>
+
+#include <loguru.hpp>
+
+using ftl::codecs::OpenCVDecoder;
+using ftl::codecs::codec_t;
+
+OpenCVDecoder::OpenCVDecoder() {
+
+}
+
+OpenCVDecoder::~OpenCVDecoder() {
+
+}
+
+bool OpenCVDecoder::accepts(const ftl::codecs::Packet &pkt) {
+	return (pkt.codec == codec_t::JPG || pkt.codec == codec_t::PNG);
+}
+
+bool OpenCVDecoder::decode(const ftl::codecs::Packet &pkt, cv::Mat &out) {
+	cv::Mat tmp;
+
+	int chunk_dim = std::sqrt(pkt.block_total);
+	int chunk_width = out.cols / chunk_dim;
+	int chunk_height = out.rows / chunk_dim;
+
+	// Build chunk head
+	int cx = (pkt.block_number % chunk_dim) * chunk_width;
+	int cy = (pkt.block_number / chunk_dim) * chunk_height;
+	cv::Rect roi(cx,cy,chunk_width,chunk_height);
+	cv::Mat chunkHead = out(roi);
+
+	// Decode in temporary buffers to prevent long locks
+	cv::imdecode(pkt.data, cv::IMREAD_UNCHANGED, &tmp);
+
+	// Apply colour correction to chunk
+	//ftl::rgbd::colourCorrection(tmp_rgb, gamma_, temperature_);
+
+
+	// TODO:(Nick) Decode directly into double buffer if no scaling
+	// Can either check JPG/PNG headers or just use pkt definition.
+
+	// Original size so just copy
+	if (tmp.cols == chunkHead.cols) {
+		if (!tmp.empty() && tmp.type() == CV_16U && chunkHead.type() == CV_32F) {
+			tmp.convertTo(chunkHead, CV_32FC1, 1.0f/1000.0f); //(16.0f*10.0f));
+		} else if (!tmp.empty() && tmp.type() == CV_8UC3 && chunkHead.type() == CV_8UC3) {
+			tmp.copyTo(chunkHead);
+		} else {
+			// Silent ignore?
+		}
+	// Downsized so needs a scale up
+	} else {
+		if (!tmp.empty() && tmp.type() == CV_16U && chunkHead.type() == CV_32F) {
+			tmp.convertTo(tmp, CV_32FC1, 1.0f/1000.0f); //(16.0f*10.0f));
+			cv::resize(tmp, chunkHead, chunkHead.size(), 0, 0, cv::INTER_NEAREST);
+		} else if (!tmp.empty() && tmp.type() == CV_8UC3 && chunkHead.type() == CV_8UC3) {
+			cv::resize(tmp, chunkHead, chunkHead.size());
+		} else {
+			// Silent ignore?
+		}
+	}
+
+	return true;
+}
diff --git a/components/codecs/src/opencv_encoder.cpp b/components/codecs/src/opencv_encoder.cpp
new file mode 100644
index 000000000..5dafabf29
--- /dev/null
+++ b/components/codecs/src/opencv_encoder.cpp
@@ -0,0 +1,116 @@
+#include <ftl/codecs/opencv_encoder.hpp>
+
+#include <loguru.hpp>
+#include <vector>
+
+using ftl::codecs::definition_t;
+using ftl::codecs::codec_t;
+using ftl::codecs::bitrate_t;
+using ftl::codecs::OpenCVEncoder;
+using ftl::codecs::preset_t;
+using ftl::codecs::CodecPreset;
+using std::vector;
+
+OpenCVEncoder::OpenCVEncoder(ftl::codecs::definition_t maxdef,
+			ftl::codecs::definition_t mindef) : Encoder(maxdef, mindef, ftl::codecs::device_t::Software) {
+	jobs_ = 0;
+}
+
+OpenCVEncoder::~OpenCVEncoder() {
+    
+}
+
+bool OpenCVEncoder::encode(const cv::Mat &in, definition_t definition, bitrate_t bitrate, const std::function<void(const ftl::codecs::Packet&)> &cb) {
+	cv::Mat tmp;
+	bool is_colour = in.type() != CV_32F;
+	current_definition_ = definition;
+
+	// Scale down image to match requested definition...
+	if (ftl::codecs::getHeight(current_definition_) < in.rows) {
+		cv::resize(in, tmp, cv::Size(ftl::codecs::getWidth(current_definition_), ftl::codecs::getHeight(current_definition_)), 0, 0, (is_colour) ? 1 : cv::INTER_NEAREST);
+	} else {
+		tmp = in;
+	}
+
+	// Represent float at 16bit int
+    if (!is_colour) {
+		tmp.convertTo(tmp, CV_16UC1, 1000);
+	}
+
+	// TODO: Choose these base upon resolution
+	chunk_count_ = 16;
+	chunk_dim_ = 4;
+	jobs_ = chunk_count_;
+
+	for (int i=0; i<chunk_count_; ++i) {
+		// Add chunk job to thread pool
+		ftl::pool.push([this,i,&tmp,cb,is_colour,bitrate](int id) {
+			ftl::codecs::Packet pkt;
+			pkt.block_number = i;
+			pkt.block_total = chunk_count_;
+			pkt.definition = current_definition_;
+			pkt.codec = (is_colour) ? codec_t::JPG : codec_t::PNG;
+
+			try {
+				_encodeBlock(tmp, pkt, bitrate);
+			} catch(...) {
+				LOG(ERROR) << "OpenCV encode block exception: " << i;
+			}
+
+			try {
+				cb(pkt);
+			} catch(...) {
+				LOG(ERROR) << "OpenCV encoder callback exception";
+			}
+
+			std::unique_lock<std::mutex> lk(job_mtx_);
+			--jobs_;
+			if (jobs_ == 0) job_cv_.notify_one();
+		});
+	}
+
+	std::unique_lock<std::mutex> lk(job_mtx_);
+	job_cv_.wait_for(lk, std::chrono::seconds(20), [this]{ return jobs_ == 0; });
+	if (jobs_ != 0) {
+		LOG(FATAL) << "Deadlock detected (" << jobs_ << ")";
+	}
+
+	return true;
+}
+
+bool OpenCVEncoder::_encodeBlock(const cv::Mat &in, ftl::codecs::Packet &pkt, bitrate_t bitrate) {
+	int chunk_width = in.cols / chunk_dim_;
+	int chunk_height = in.rows / chunk_dim_;
+
+	// Build chunk heads
+	int cx = (pkt.block_number % chunk_dim_) * chunk_width;
+	int cy = (pkt.block_number / chunk_dim_) * chunk_height;
+	cv::Rect roi(cx,cy,chunk_width,chunk_height);
+	cv::Mat chunkHead = in(roi);
+
+	if (pkt.codec == codec_t::PNG) {
+		vector<int> params = {cv::IMWRITE_PNG_COMPRESSION, 1};
+		if (!cv::imencode(".png", chunkHead, pkt.data, params)) {
+			LOG(ERROR) << "PNG Encoding error";
+			return false;
+		}
+		return true;
+	} else if (pkt.codec == codec_t::JPG) {
+		int q = 95;
+
+		switch (bitrate) {
+		case bitrate_t::High		: q = 95; break;
+		case bitrate_t::Standard	: q = 75; break;
+		case bitrate_t::Low			: q = 50; break;
+		}
+
+		vector<int> params = {cv::IMWRITE_JPEG_QUALITY, q};
+		cv::imencode(".jpg", chunkHead, pkt.data, params);
+		return true;
+	} else {
+		LOG(ERROR) << "Bad channel configuration: imagetype=" << in.type(); 
+	}
+
+	return false;
+}
+
diff --git a/components/codecs/test/CMakeLists.txt b/components/codecs/test/CMakeLists.txt
new file mode 100644
index 000000000..534336fed
--- /dev/null
+++ b/components/codecs/test/CMakeLists.txt
@@ -0,0 +1,32 @@
+### OpenCV Codec Unit ################################################################
+add_executable(opencv_codec_unit
+	./tests.cpp
+	../src/bitrates.cpp
+	../src/encoder.cpp
+	../src/opencv_encoder.cpp
+	../src/opencv_decoder.cpp
+	./opencv_codec_unit.cpp
+)
+target_include_directories(opencv_codec_unit PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/../include")
+target_link_libraries(opencv_codec_unit
+	Threads::Threads ${OS_LIBS} ${OpenCV_LIBS} ftlcommon)
+
+
+add_test(OpenCVCodecUnitTest opencv_codec_unit)
+
+
+### NvPipe Codec Unit ################################################################
+add_executable(nvpipe_codec_unit
+	./tests.cpp
+	../src/bitrates.cpp
+	../src/encoder.cpp
+	../src/nvpipe_encoder.cpp
+	../src/nvpipe_decoder.cpp
+	./nvpipe_codec_unit.cpp
+)
+target_include_directories(nvpipe_codec_unit PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/../include")
+target_link_libraries(nvpipe_codec_unit
+	Threads::Threads ${OS_LIBS} ${OpenCV_LIBS} ${CUDA_LIBRARIES} ftlcommon nvpipe)
+
+
+add_test(NvPipeCodecUnitTest nvpipe_codec_unit)
diff --git a/components/codecs/test/catch.hpp b/components/codecs/test/catch.hpp
new file mode 100644
index 000000000..b1b2411d2
--- /dev/null
+++ b/components/codecs/test/catch.hpp
@@ -0,0 +1,14362 @@
+/*
+ *  Catch v2.5.0
+ *  Generated: 2018-11-26 20:46:12.165372
+ *  ----------------------------------------------------------
+ *  This file has been merged from multiple headers. Please don't edit it directly
+ *  Copyright (c) 2018 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+#ifndef TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
+#define TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
+// start catch.hpp
+
+
+#define CATCH_VERSION_MAJOR 2
+#define CATCH_VERSION_MINOR 5
+#define CATCH_VERSION_PATCH 0
+
+#ifdef __clang__
+#    pragma clang system_header
+#elif defined __GNUC__
+#    pragma GCC system_header
+#endif
+
+// start catch_suppress_warnings.h
+
+#ifdef __clang__
+#   ifdef __ICC // icpc defines the __clang__ macro
+#       pragma warning(push)
+#       pragma warning(disable: 161 1682)
+#   else // __ICC
+#       pragma clang diagnostic push
+#       pragma clang diagnostic ignored "-Wpadded"
+#       pragma clang diagnostic ignored "-Wswitch-enum"
+#       pragma clang diagnostic ignored "-Wcovered-switch-default"
+#    endif
+#elif defined __GNUC__
+     // GCC likes to warn on REQUIREs, and we cannot suppress them
+     // locally because g++'s support for _Pragma is lacking in older,
+     // still supported, versions
+#    pragma GCC diagnostic ignored "-Wparentheses"
+#    pragma GCC diagnostic push
+#    pragma GCC diagnostic ignored "-Wunused-variable"
+#    pragma GCC diagnostic ignored "-Wpadded"
+#endif
+// end catch_suppress_warnings.h
+#if defined(CATCH_CONFIG_MAIN) || defined(CATCH_CONFIG_RUNNER)
+#  define CATCH_IMPL
+#  define CATCH_CONFIG_ALL_PARTS
+#endif
+
+// In the impl file, we want to have access to all parts of the headers
+// Can also be used to sanely support PCHs
+#if defined(CATCH_CONFIG_ALL_PARTS)
+#  define CATCH_CONFIG_EXTERNAL_INTERFACES
+#  if defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#    undef CATCH_CONFIG_DISABLE_MATCHERS
+#  endif
+#  if !defined(CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER)
+#    define CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
+#  endif
+#endif
+
+#if !defined(CATCH_CONFIG_IMPL_ONLY)
+// start catch_platform.h
+
+#ifdef __APPLE__
+# include <TargetConditionals.h>
+# if TARGET_OS_OSX == 1
+#  define CATCH_PLATFORM_MAC
+# elif TARGET_OS_IPHONE == 1
+#  define CATCH_PLATFORM_IPHONE
+# endif
+
+#elif defined(linux) || defined(__linux) || defined(__linux__)
+#  define CATCH_PLATFORM_LINUX
+
+#elif defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || defined(_MSC_VER) || defined(__MINGW32__)
+#  define CATCH_PLATFORM_WINDOWS
+#endif
+
+// end catch_platform.h
+
+#ifdef CATCH_IMPL
+#  ifndef CLARA_CONFIG_MAIN
+#    define CLARA_CONFIG_MAIN_NOT_DEFINED
+#    define CLARA_CONFIG_MAIN
+#  endif
+#endif
+
+// start catch_user_interfaces.h
+
+namespace Catch {
+    unsigned int rngSeed();
+}
+
+// end catch_user_interfaces.h
+// start catch_tag_alias_autoregistrar.h
+
+// start catch_common.h
+
+// start catch_compiler_capabilities.h
+
+// Detect a number of compiler features - by compiler
+// The following features are defined:
+//
+// CATCH_CONFIG_COUNTER : is the __COUNTER__ macro supported?
+// CATCH_CONFIG_WINDOWS_SEH : is Windows SEH supported?
+// CATCH_CONFIG_POSIX_SIGNALS : are POSIX signals supported?
+// CATCH_CONFIG_DISABLE_EXCEPTIONS : Are exceptions enabled?
+// ****************
+// Note to maintainers: if new toggles are added please document them
+// in configuration.md, too
+// ****************
+
+// In general each macro has a _NO_<feature name> form
+// (e.g. CATCH_CONFIG_NO_POSIX_SIGNALS) which disables the feature.
+// Many features, at point of detection, define an _INTERNAL_ macro, so they
+// can be combined, en-mass, with the _NO_ forms later.
+
+#ifdef __cplusplus
+
+#  if (__cplusplus >= 201402L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L)
+#    define CATCH_CPP14_OR_GREATER
+#  endif
+
+#  if (__cplusplus >= 201703L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
+#    define CATCH_CPP17_OR_GREATER
+#  endif
+
+#endif
+
+#if defined(CATCH_CPP17_OR_GREATER)
+#  define CATCH_INTERNAL_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS
+#endif
+
+#ifdef __clang__
+
+#       define CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+            _Pragma( "clang diagnostic push" ) \
+            _Pragma( "clang diagnostic ignored \"-Wexit-time-destructors\"" ) \
+            _Pragma( "clang diagnostic ignored \"-Wglobal-constructors\"")
+#       define CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS \
+            _Pragma( "clang diagnostic pop" )
+
+#       define CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS \
+            _Pragma( "clang diagnostic push" ) \
+            _Pragma( "clang diagnostic ignored \"-Wparentheses\"" )
+#       define CATCH_INTERNAL_UNSUPPRESS_PARENTHESES_WARNINGS \
+            _Pragma( "clang diagnostic pop" )
+
+#       define CATCH_INTERNAL_SUPPRESS_UNUSED_WARNINGS \
+            _Pragma( "clang diagnostic push" ) \
+            _Pragma( "clang diagnostic ignored \"-Wunused-variable\"" )
+#       define CATCH_INTERNAL_UNSUPPRESS_UNUSED_WARNINGS \
+            _Pragma( "clang diagnostic pop" )
+
+#endif // __clang__
+
+////////////////////////////////////////////////////////////////////////////////
+// Assume that non-Windows platforms support posix signals by default
+#if !defined(CATCH_PLATFORM_WINDOWS)
+    #define CATCH_INTERNAL_CONFIG_POSIX_SIGNALS
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// We know some environments not to support full POSIX signals
+#if defined(__CYGWIN__) || defined(__QNX__) || defined(__EMSCRIPTEN__) || defined(__DJGPP__)
+    #define CATCH_INTERNAL_CONFIG_NO_POSIX_SIGNALS
+#endif
+
+#ifdef __OS400__
+#       define CATCH_INTERNAL_CONFIG_NO_POSIX_SIGNALS
+#       define CATCH_CONFIG_COLOUR_NONE
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// Android somehow still does not support std::to_string
+#if defined(__ANDROID__)
+#    define CATCH_INTERNAL_CONFIG_NO_CPP11_TO_STRING
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// Not all Windows environments support SEH properly
+#if defined(__MINGW32__)
+#    define CATCH_INTERNAL_CONFIG_NO_WINDOWS_SEH
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// PS4
+#if defined(__ORBIS__)
+#    define CATCH_INTERNAL_CONFIG_NO_NEW_CAPTURE
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// Cygwin
+#ifdef __CYGWIN__
+
+// Required for some versions of Cygwin to declare gettimeofday
+// see: http://stackoverflow.com/questions/36901803/gettimeofday-not-declared-in-this-scope-cygwin
+#   define _BSD_SOURCE
+// some versions of cygwin (most) do not support std::to_string. Use the libstd check.
+// https://gcc.gnu.org/onlinedocs/gcc-4.8.2/libstdc++/api/a01053_source.html line 2812-2813
+# if !((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) \
+	       && !defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF))
+
+#	define CATCH_INTERNAL_CONFIG_NO_CPP11_TO_STRING
+
+# endif
+#endif // __CYGWIN__
+
+////////////////////////////////////////////////////////////////////////////////
+// Visual C++
+#ifdef _MSC_VER
+
+#  if _MSC_VER >= 1900 // Visual Studio 2015 or newer
+#    define CATCH_INTERNAL_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS
+#  endif
+
+// Universal Windows platform does not support SEH
+// Or console colours (or console at all...)
+#  if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)
+#    define CATCH_CONFIG_COLOUR_NONE
+#  else
+#    define CATCH_INTERNAL_CONFIG_WINDOWS_SEH
+#  endif
+
+// MSVC traditional preprocessor needs some workaround for __VA_ARGS__
+// _MSVC_TRADITIONAL == 0 means new conformant preprocessor
+// _MSVC_TRADITIONAL == 1 means old traditional non-conformant preprocessor
+#  if !defined(_MSVC_TRADITIONAL) || (defined(_MSVC_TRADITIONAL) && _MSVC_TRADITIONAL)
+#    define CATCH_INTERNAL_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#  endif
+
+#endif // _MSC_VER
+
+////////////////////////////////////////////////////////////////////////////////
+// Check if we are compiled with -fno-exceptions or equivalent
+#if defined(__EXCEPTIONS) || defined(__cpp_exceptions) || defined(_CPPUNWIND)
+#  define CATCH_INTERNAL_CONFIG_EXCEPTIONS_ENABLED
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// DJGPP
+#ifdef __DJGPP__
+#  define CATCH_INTERNAL_CONFIG_NO_WCHAR
+#endif // __DJGPP__
+
+////////////////////////////////////////////////////////////////////////////////
+// Embarcadero C++Build
+#if defined(__BORLANDC__)
+    #define CATCH_INTERNAL_CONFIG_POLYFILL_ISNAN
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Use of __COUNTER__ is suppressed during code analysis in
+// CLion/AppCode 2017.2.x and former, because __COUNTER__ is not properly
+// handled by it.
+// Otherwise all supported compilers support COUNTER macro,
+// but user still might want to turn it off
+#if ( !defined(__JETBRAINS_IDE__) || __JETBRAINS_IDE__ >= 20170300L )
+    #define CATCH_INTERNAL_CONFIG_COUNTER
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// Check if string_view is available and usable
+// The check is split apart to work around v140 (VS2015) preprocessor issue...
+#if defined(__has_include)
+#if __has_include(<string_view>) && defined(CATCH_CPP17_OR_GREATER)
+#    define CATCH_INTERNAL_CONFIG_CPP17_STRING_VIEW
+#endif
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+// Check if variant is available and usable
+#if defined(__has_include)
+#  if __has_include(<variant>) && defined(CATCH_CPP17_OR_GREATER)
+#    if defined(__clang__) && (__clang_major__ < 8)
+       // work around clang bug with libstdc++ https://bugs.llvm.org/show_bug.cgi?id=31852
+       // fix should be in clang 8, workaround in libstdc++ 8.2
+#      include <ciso646>
+#      if defined(__GLIBCXX__) && defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE < 9)
+#        define CATCH_CONFIG_NO_CPP17_VARIANT
+#     else
+#        define CATCH_INTERNAL_CONFIG_CPP17_VARIANT
+#      endif // defined(__GLIBCXX__) && defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE < 9)
+#    endif // defined(__clang__) && (__clang_major__ < 8)
+#  endif // __has_include(<variant>) && defined(CATCH_CPP17_OR_GREATER)
+#endif // __has_include
+
+#if defined(CATCH_INTERNAL_CONFIG_COUNTER) && !defined(CATCH_CONFIG_NO_COUNTER) && !defined(CATCH_CONFIG_COUNTER)
+#   define CATCH_CONFIG_COUNTER
+#endif
+#if defined(CATCH_INTERNAL_CONFIG_WINDOWS_SEH) && !defined(CATCH_CONFIG_NO_WINDOWS_SEH) && !defined(CATCH_CONFIG_WINDOWS_SEH) && !defined(CATCH_INTERNAL_CONFIG_NO_WINDOWS_SEH)
+#   define CATCH_CONFIG_WINDOWS_SEH
+#endif
+// This is set by default, because we assume that unix compilers are posix-signal-compatible by default.
+#if defined(CATCH_INTERNAL_CONFIG_POSIX_SIGNALS) && !defined(CATCH_INTERNAL_CONFIG_NO_POSIX_SIGNALS) && !defined(CATCH_CONFIG_NO_POSIX_SIGNALS) && !defined(CATCH_CONFIG_POSIX_SIGNALS)
+#   define CATCH_CONFIG_POSIX_SIGNALS
+#endif
+// This is set by default, because we assume that compilers with no wchar_t support are just rare exceptions.
+#if !defined(CATCH_INTERNAL_CONFIG_NO_WCHAR) && !defined(CATCH_CONFIG_NO_WCHAR) && !defined(CATCH_CONFIG_WCHAR)
+#   define CATCH_CONFIG_WCHAR
+#endif
+
+#if !defined(CATCH_INTERNAL_CONFIG_NO_CPP11_TO_STRING) && !defined(CATCH_CONFIG_NO_CPP11_TO_STRING) && !defined(CATCH_CONFIG_CPP11_TO_STRING)
+#    define CATCH_CONFIG_CPP11_TO_STRING
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS) && !defined(CATCH_CONFIG_NO_CPP17_UNCAUGHT_EXCEPTIONS) && !defined(CATCH_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS)
+#  define CATCH_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_CPP17_STRING_VIEW) && !defined(CATCH_CONFIG_NO_CPP17_STRING_VIEW) && !defined(CATCH_CONFIG_CPP17_STRING_VIEW)
+#  define CATCH_CONFIG_CPP17_STRING_VIEW
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_CPP17_VARIANT) && !defined(CATCH_CONFIG_NO_CPP17_VARIANT) && !defined(CATCH_CONFIG_CPP17_VARIANT)
+#  define CATCH_CONFIG_CPP17_VARIANT
+#endif
+
+#if defined(CATCH_CONFIG_EXPERIMENTAL_REDIRECT)
+#  define CATCH_INTERNAL_CONFIG_NEW_CAPTURE
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_NEW_CAPTURE) && !defined(CATCH_INTERNAL_CONFIG_NO_NEW_CAPTURE) && !defined(CATCH_CONFIG_NO_NEW_CAPTURE) && !defined(CATCH_CONFIG_NEW_CAPTURE)
+#  define CATCH_CONFIG_NEW_CAPTURE
+#endif
+
+#if !defined(CATCH_INTERNAL_CONFIG_EXCEPTIONS_ENABLED) && !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+#  define CATCH_CONFIG_DISABLE_EXCEPTIONS
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_POLYFILL_ISNAN) && !defined(CATCH_CONFIG_NO_POLYFILL_ISNAN) && !defined(CATCH_CONFIG_POLYFILL_ISNAN)
+#  define CATCH_CONFIG_POLYFILL_ISNAN
+#endif
+
+#if !defined(CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS)
+#   define CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS
+#   define CATCH_INTERNAL_UNSUPPRESS_PARENTHESES_WARNINGS
+#endif
+#if !defined(CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS)
+#   define CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS
+#   define CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS
+#endif
+#if !defined(CATCH_INTERNAL_SUPPRESS_UNUSED_WARNINGS)
+#   define CATCH_INTERNAL_SUPPRESS_UNUSED_WARNINGS
+#   define CATCH_INTERNAL_UNSUPPRESS_UNUSED_WARNINGS
+#endif
+
+#if defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+#define CATCH_TRY if ((true))
+#define CATCH_CATCH_ALL if ((false))
+#define CATCH_CATCH_ANON(type) if ((false))
+#else
+#define CATCH_TRY try
+#define CATCH_CATCH_ALL catch (...)
+#define CATCH_CATCH_ANON(type) catch (type)
+#endif
+
+#if defined(CATCH_INTERNAL_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR) && !defined(CATCH_CONFIG_NO_TRADITIONAL_MSVC_PREPROCESSOR) && !defined(CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR)
+#define CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#endif
+
+// end catch_compiler_capabilities.h
+#define INTERNAL_CATCH_UNIQUE_NAME_LINE2( name, line ) name##line
+#define INTERNAL_CATCH_UNIQUE_NAME_LINE( name, line ) INTERNAL_CATCH_UNIQUE_NAME_LINE2( name, line )
+#ifdef CATCH_CONFIG_COUNTER
+#  define INTERNAL_CATCH_UNIQUE_NAME( name ) INTERNAL_CATCH_UNIQUE_NAME_LINE( name, __COUNTER__ )
+#else
+#  define INTERNAL_CATCH_UNIQUE_NAME( name ) INTERNAL_CATCH_UNIQUE_NAME_LINE( name, __LINE__ )
+#endif
+
+#include <iosfwd>
+#include <string>
+#include <cstdint>
+
+// We need a dummy global operator<< so we can bring it into Catch namespace later
+struct Catch_global_namespace_dummy {};
+std::ostream& operator<<(std::ostream&, Catch_global_namespace_dummy);
+
+namespace Catch {
+
+    struct CaseSensitive { enum Choice {
+        Yes,
+        No
+    }; };
+
+    class NonCopyable {
+        NonCopyable( NonCopyable const& )              = delete;
+        NonCopyable( NonCopyable && )                  = delete;
+        NonCopyable& operator = ( NonCopyable const& ) = delete;
+        NonCopyable& operator = ( NonCopyable && )     = delete;
+
+    protected:
+        NonCopyable();
+        virtual ~NonCopyable();
+    };
+
+    struct SourceLineInfo {
+
+        SourceLineInfo() = delete;
+        SourceLineInfo( char const* _file, std::size_t _line ) noexcept
+        :   file( _file ),
+            line( _line )
+        {}
+
+        SourceLineInfo( SourceLineInfo const& other )        = default;
+        SourceLineInfo( SourceLineInfo && )                  = default;
+        SourceLineInfo& operator = ( SourceLineInfo const& ) = default;
+        SourceLineInfo& operator = ( SourceLineInfo && )     = default;
+
+        bool empty() const noexcept;
+        bool operator == ( SourceLineInfo const& other ) const noexcept;
+        bool operator < ( SourceLineInfo const& other ) const noexcept;
+
+        char const* file;
+        std::size_t line;
+    };
+
+    std::ostream& operator << ( std::ostream& os, SourceLineInfo const& info );
+
+    // Bring in operator<< from global namespace into Catch namespace
+    // This is necessary because the overload of operator<< above makes
+    // lookup stop at namespace Catch
+    using ::operator<<;
+
+    // Use this in variadic streaming macros to allow
+    //    >> +StreamEndStop
+    // as well as
+    //    >> stuff +StreamEndStop
+    struct StreamEndStop {
+        std::string operator+() const;
+    };
+    template<typename T>
+    T const& operator + ( T const& value, StreamEndStop ) {
+        return value;
+    }
+}
+
+#define CATCH_INTERNAL_LINEINFO \
+    ::Catch::SourceLineInfo( __FILE__, static_cast<std::size_t>( __LINE__ ) )
+
+// end catch_common.h
+namespace Catch {
+
+    struct RegistrarForTagAliases {
+        RegistrarForTagAliases( char const* alias, char const* tag, SourceLineInfo const& lineInfo );
+    };
+
+} // end namespace Catch
+
+#define CATCH_REGISTER_TAG_ALIAS( alias, spec ) \
+    CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+    namespace{ Catch::RegistrarForTagAliases INTERNAL_CATCH_UNIQUE_NAME( AutoRegisterTagAlias )( alias, spec, CATCH_INTERNAL_LINEINFO ); } \
+    CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS
+
+// end catch_tag_alias_autoregistrar.h
+// start catch_test_registry.h
+
+// start catch_interfaces_testcase.h
+
+#include <vector>
+#include <memory>
+
+namespace Catch {
+
+    class TestSpec;
+
+    struct ITestInvoker {
+        virtual void invoke () const = 0;
+        virtual ~ITestInvoker();
+    };
+
+    using ITestCasePtr = std::shared_ptr<ITestInvoker>;
+
+    class TestCase;
+    struct IConfig;
+
+    struct ITestCaseRegistry {
+        virtual ~ITestCaseRegistry();
+        virtual std::vector<TestCase> const& getAllTests() const = 0;
+        virtual std::vector<TestCase> const& getAllTestsSorted( IConfig const& config ) const = 0;
+    };
+
+    bool matchTest( TestCase const& testCase, TestSpec const& testSpec, IConfig const& config );
+    std::vector<TestCase> filterTests( std::vector<TestCase> const& testCases, TestSpec const& testSpec, IConfig const& config );
+    std::vector<TestCase> const& getAllTestCasesSorted( IConfig const& config );
+
+}
+
+// end catch_interfaces_testcase.h
+// start catch_stringref.h
+
+#include <cstddef>
+#include <string>
+#include <iosfwd>
+
+namespace Catch {
+
+    class StringData;
+
+    /// A non-owning string class (similar to the forthcoming std::string_view)
+    /// Note that, because a StringRef may be a substring of another string,
+    /// it may not be null terminated. c_str() must return a null terminated
+    /// string, however, and so the StringRef will internally take ownership
+    /// (taking a copy), if necessary. In theory this ownership is not externally
+    /// visible - but it does mean (substring) StringRefs should not be shared between
+    /// threads.
+    class StringRef {
+    public:
+        using size_type = std::size_t;
+
+    private:
+        friend struct StringRefTestAccess;
+
+        char const* m_start;
+        size_type m_size;
+
+        char* m_data = nullptr;
+
+        void takeOwnership();
+
+        static constexpr char const* const s_empty = "";
+
+    public: // construction/ assignment
+        StringRef() noexcept
+        :   StringRef( s_empty, 0 )
+        {}
+
+        StringRef( StringRef const& other ) noexcept
+        :   m_start( other.m_start ),
+            m_size( other.m_size )
+        {}
+
+        StringRef( StringRef&& other ) noexcept
+        :   m_start( other.m_start ),
+            m_size( other.m_size ),
+            m_data( other.m_data )
+        {
+            other.m_data = nullptr;
+        }
+
+        StringRef( char const* rawChars ) noexcept;
+
+        StringRef( char const* rawChars, size_type size ) noexcept
+        :   m_start( rawChars ),
+            m_size( size )
+        {}
+
+        StringRef( std::string const& stdString ) noexcept
+        :   m_start( stdString.c_str() ),
+            m_size( stdString.size() )
+        {}
+
+        ~StringRef() noexcept {
+            delete[] m_data;
+        }
+
+        auto operator = ( StringRef const &other ) noexcept -> StringRef& {
+            delete[] m_data;
+            m_data = nullptr;
+            m_start = other.m_start;
+            m_size = other.m_size;
+            return *this;
+        }
+
+        operator std::string() const;
+
+        void swap( StringRef& other ) noexcept;
+
+    public: // operators
+        auto operator == ( StringRef const& other ) const noexcept -> bool;
+        auto operator != ( StringRef const& other ) const noexcept -> bool;
+
+        auto operator[] ( size_type index ) const noexcept -> char;
+
+    public: // named queries
+        auto empty() const noexcept -> bool {
+            return m_size == 0;
+        }
+        auto size() const noexcept -> size_type {
+            return m_size;
+        }
+
+        auto numberOfCharacters() const noexcept -> size_type;
+        auto c_str() const -> char const*;
+
+    public: // substrings and searches
+        auto substr( size_type start, size_type size ) const noexcept -> StringRef;
+
+        // Returns the current start pointer.
+        // Note that the pointer can change when if the StringRef is a substring
+        auto currentData() const noexcept -> char const*;
+
+    private: // ownership queries - may not be consistent between calls
+        auto isOwned() const noexcept -> bool;
+        auto isSubstring() const noexcept -> bool;
+    };
+
+    auto operator + ( StringRef const& lhs, StringRef const& rhs ) -> std::string;
+    auto operator + ( StringRef const& lhs, char const* rhs ) -> std::string;
+    auto operator + ( char const* lhs, StringRef const& rhs ) -> std::string;
+
+    auto operator += ( std::string& lhs, StringRef const& sr ) -> std::string&;
+    auto operator << ( std::ostream& os, StringRef const& sr ) -> std::ostream&;
+
+    inline auto operator "" _sr( char const* rawChars, std::size_t size ) noexcept -> StringRef {
+        return StringRef( rawChars, size );
+    }
+
+} // namespace Catch
+
+inline auto operator "" _catch_sr( char const* rawChars, std::size_t size ) noexcept -> Catch::StringRef {
+    return Catch::StringRef( rawChars, size );
+}
+
+// end catch_stringref.h
+// start catch_type_traits.hpp
+
+
+namespace Catch{
+
+#ifdef CATCH_CPP17_OR_GREATER
+	template <typename...>
+	inline constexpr auto is_unique = std::true_type{};
+
+	template <typename T, typename... Rest>
+	inline constexpr auto is_unique<T, Rest...> = std::bool_constant<
+		(!std::is_same_v<T, Rest> && ...) && is_unique<Rest...>
+	>{};
+#else
+
+template <typename...>
+struct is_unique : std::true_type{};
+
+template <typename T0, typename T1, typename... Rest>
+struct is_unique<T0, T1, Rest...> : std::integral_constant
+<bool,
+     !std::is_same<T0, T1>::value
+     && is_unique<T0, Rest...>::value
+     && is_unique<T1, Rest...>::value
+>{};
+
+#endif
+}
+
+// end catch_type_traits.hpp
+// start catch_preprocessor.hpp
+
+
+#define CATCH_RECURSION_LEVEL0(...) __VA_ARGS__
+#define CATCH_RECURSION_LEVEL1(...) CATCH_RECURSION_LEVEL0(CATCH_RECURSION_LEVEL0(CATCH_RECURSION_LEVEL0(__VA_ARGS__)))
+#define CATCH_RECURSION_LEVEL2(...) CATCH_RECURSION_LEVEL1(CATCH_RECURSION_LEVEL1(CATCH_RECURSION_LEVEL1(__VA_ARGS__)))
+#define CATCH_RECURSION_LEVEL3(...) CATCH_RECURSION_LEVEL2(CATCH_RECURSION_LEVEL2(CATCH_RECURSION_LEVEL2(__VA_ARGS__)))
+#define CATCH_RECURSION_LEVEL4(...) CATCH_RECURSION_LEVEL3(CATCH_RECURSION_LEVEL3(CATCH_RECURSION_LEVEL3(__VA_ARGS__)))
+#define CATCH_RECURSION_LEVEL5(...) CATCH_RECURSION_LEVEL4(CATCH_RECURSION_LEVEL4(CATCH_RECURSION_LEVEL4(__VA_ARGS__)))
+
+#ifdef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define INTERNAL_CATCH_EXPAND_VARGS(...) __VA_ARGS__
+// MSVC needs more evaluations
+#define CATCH_RECURSION_LEVEL6(...) CATCH_RECURSION_LEVEL5(CATCH_RECURSION_LEVEL5(CATCH_RECURSION_LEVEL5(__VA_ARGS__)))
+#define CATCH_RECURSE(...)  CATCH_RECURSION_LEVEL6(CATCH_RECURSION_LEVEL6(__VA_ARGS__))
+#else
+#define CATCH_RECURSE(...)  CATCH_RECURSION_LEVEL5(__VA_ARGS__)
+#endif
+
+#define CATCH_REC_END(...)
+#define CATCH_REC_OUT
+
+#define CATCH_EMPTY()
+#define CATCH_DEFER(id) id CATCH_EMPTY()
+
+#define CATCH_REC_GET_END2() 0, CATCH_REC_END
+#define CATCH_REC_GET_END1(...) CATCH_REC_GET_END2
+#define CATCH_REC_GET_END(...) CATCH_REC_GET_END1
+#define CATCH_REC_NEXT0(test, next, ...) next CATCH_REC_OUT
+#define CATCH_REC_NEXT1(test, next) CATCH_DEFER ( CATCH_REC_NEXT0 ) ( test, next, 0)
+#define CATCH_REC_NEXT(test, next)  CATCH_REC_NEXT1(CATCH_REC_GET_END test, next)
+
+#define CATCH_REC_LIST0(f, x, peek, ...) , f(x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST1) ) ( f, peek, __VA_ARGS__ )
+#define CATCH_REC_LIST1(f, x, peek, ...) , f(x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST0) ) ( f, peek, __VA_ARGS__ )
+#define CATCH_REC_LIST2(f, x, peek, ...)   f(x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST1) ) ( f, peek, __VA_ARGS__ )
+
+#define CATCH_REC_LIST0_UD(f, userdata, x, peek, ...) , f(userdata, x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST1_UD) ) ( f, userdata, peek, __VA_ARGS__ )
+#define CATCH_REC_LIST1_UD(f, userdata, x, peek, ...) , f(userdata, x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST0_UD) ) ( f, userdata, peek, __VA_ARGS__ )
+#define CATCH_REC_LIST2_UD(f, userdata, x, peek, ...)   f(userdata, x) CATCH_DEFER ( CATCH_REC_NEXT(peek, CATCH_REC_LIST1_UD) ) ( f, userdata, peek, __VA_ARGS__ )
+
+// Applies the function macro `f` to each of the remaining parameters, inserts commas between the results,
+// and passes userdata as the first parameter to each invocation,
+// e.g. CATCH_REC_LIST_UD(f, x, a, b, c) evaluates to f(x, a), f(x, b), f(x, c)
+#define CATCH_REC_LIST_UD(f, userdata, ...) CATCH_RECURSE(CATCH_REC_LIST2_UD(f, userdata, __VA_ARGS__, ()()(), ()()(), ()()(), 0))
+
+#define CATCH_REC_LIST(f, ...) CATCH_RECURSE(CATCH_REC_LIST2(f, __VA_ARGS__, ()()(), ()()(), ()()(), 0))
+
+#define INTERNAL_CATCH_EXPAND1(param) INTERNAL_CATCH_EXPAND2(param)
+#define INTERNAL_CATCH_EXPAND2(...) INTERNAL_CATCH_NO## __VA_ARGS__
+#define INTERNAL_CATCH_DEF(...) INTERNAL_CATCH_DEF __VA_ARGS__
+#define INTERNAL_CATCH_NOINTERNAL_CATCH_DEF
+
+#define INTERNAL_CATCH_REMOVE_PARENS(...) INTERNAL_CATCH_EXPAND1(INTERNAL_CATCH_DEF __VA_ARGS__)
+
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME2(Name, ...) INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME3(Name, __VA_ARGS__)
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME3(Name,...) Name " - " #__VA_ARGS__
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME(Name,...) INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME2(Name, INTERNAL_CATCH_REMOVE_PARENS(__VA_ARGS__))
+#else
+// MSVC is adding extra space and needs more calls to properly remove ()
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME3(Name,...) Name " -" #__VA_ARGS__
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME1(Name, ...) INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME2(Name, __VA_ARGS__)
+#define INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME(Name, ...) INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME1(Name, INTERNAL_CATCH_EXPAND_VARGS(INTERNAL_CATCH_REMOVE_PARENS(__VA_ARGS__)))
+#endif
+
+// end catch_preprocessor.hpp
+namespace Catch {
+
+template<typename C>
+class TestInvokerAsMethod : public ITestInvoker {
+    void (C::*m_testAsMethod)();
+public:
+    TestInvokerAsMethod( void (C::*testAsMethod)() ) noexcept : m_testAsMethod( testAsMethod ) {}
+
+    void invoke() const override {
+        C obj;
+        (obj.*m_testAsMethod)();
+    }
+};
+
+auto makeTestInvoker( void(*testAsFunction)() ) noexcept -> ITestInvoker*;
+
+template<typename C>
+auto makeTestInvoker( void (C::*testAsMethod)() ) noexcept -> ITestInvoker* {
+    return new(std::nothrow) TestInvokerAsMethod<C>( testAsMethod );
+}
+
+struct NameAndTags {
+    NameAndTags( StringRef const& name_ = StringRef(), StringRef const& tags_ = StringRef() ) noexcept;
+    StringRef name;
+    StringRef tags;
+};
+
+struct AutoReg : NonCopyable {
+    AutoReg( ITestInvoker* invoker, SourceLineInfo const& lineInfo, StringRef const& classOrMethod, NameAndTags const& nameAndTags ) noexcept;
+    ~AutoReg();
+};
+
+} // end namespace Catch
+
+#if defined(CATCH_CONFIG_DISABLE)
+    #define INTERNAL_CATCH_TESTCASE_NO_REGISTRATION( TestName, ... ) \
+        static void TestName()
+    #define INTERNAL_CATCH_TESTCASE_METHOD_NO_REGISTRATION( TestName, ClassName, ... ) \
+        namespace{                        \
+            struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName) { \
+                void test();              \
+            };                            \
+        }                                 \
+        void TestName::test()
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_NO_REGISTRATION( TestName, ... )  \
+        template<typename TestType>                                             \
+        static void TestName()
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_NO_REGISTRATION( TestName, ClassName, ... )    \
+        namespace{                                                                                  \
+            template<typename TestType>                                                             \
+            struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName <TestType>) {     \
+                void test();                                                                        \
+            };                                                                                      \
+        }                                                                                           \
+        template<typename TestType>                                                                 \
+        void TestName::test()
+#endif
+
+    ///////////////////////////////////////////////////////////////////////////////
+    #define INTERNAL_CATCH_TESTCASE2( TestName, ... ) \
+        static void TestName(); \
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        namespace{ Catch::AutoReg INTERNAL_CATCH_UNIQUE_NAME( autoRegistrar )( Catch::makeTestInvoker( &TestName ), CATCH_INTERNAL_LINEINFO, Catch::StringRef(), Catch::NameAndTags{ __VA_ARGS__ } ); } /* NOLINT */ \
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS \
+        static void TestName()
+    #define INTERNAL_CATCH_TESTCASE( ... ) \
+        INTERNAL_CATCH_TESTCASE2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ), __VA_ARGS__ )
+
+    ///////////////////////////////////////////////////////////////////////////////
+    #define INTERNAL_CATCH_METHOD_AS_TEST_CASE( QualifiedMethod, ... ) \
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        namespace{ Catch::AutoReg INTERNAL_CATCH_UNIQUE_NAME( autoRegistrar )( Catch::makeTestInvoker( &QualifiedMethod ), CATCH_INTERNAL_LINEINFO, "&" #QualifiedMethod, Catch::NameAndTags{ __VA_ARGS__ } ); } /* NOLINT */ \
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS
+
+    ///////////////////////////////////////////////////////////////////////////////
+    #define INTERNAL_CATCH_TEST_CASE_METHOD2( TestName, ClassName, ... )\
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        namespace{ \
+            struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName) { \
+                void test(); \
+            }; \
+            Catch::AutoReg INTERNAL_CATCH_UNIQUE_NAME( autoRegistrar ) ( Catch::makeTestInvoker( &TestName::test ), CATCH_INTERNAL_LINEINFO, #ClassName, Catch::NameAndTags{ __VA_ARGS__ } ); /* NOLINT */ \
+        } \
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS \
+        void TestName::test()
+    #define INTERNAL_CATCH_TEST_CASE_METHOD( ClassName, ... ) \
+        INTERNAL_CATCH_TEST_CASE_METHOD2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ), ClassName, __VA_ARGS__ )
+
+    ///////////////////////////////////////////////////////////////////////////////
+    #define INTERNAL_CATCH_REGISTER_TESTCASE( Function, ... ) \
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        Catch::AutoReg INTERNAL_CATCH_UNIQUE_NAME( autoRegistrar )( Catch::makeTestInvoker( Function ), CATCH_INTERNAL_LINEINFO, Catch::StringRef(), Catch::NameAndTags{ __VA_ARGS__ } ); /* NOLINT */ \
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS
+
+    ///////////////////////////////////////////////////////////////////////////////
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_2(TestName, TestFunc, Name, Tags, ... )\
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        template<typename TestType> \
+        static void TestFunc();\
+        namespace {\
+            template<typename...Types> \
+            struct TestName{\
+                template<typename...Ts> \
+                TestName(Ts...names){\
+                    CATCH_INTERNAL_CHECK_UNIQUE_TYPES(CATCH_REC_LIST(INTERNAL_CATCH_REMOVE_PARENS, __VA_ARGS__)) \
+                    using expander = int[];\
+                    (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestFunc<Types> ), CATCH_INTERNAL_LINEINFO, Catch::StringRef(), Catch::NameAndTags{ names, Tags } ), 0)... };/* NOLINT */ \
+                }\
+            };\
+            INTERNAL_CATCH_TEMPLATE_REGISTRY_INITIATE(TestName, Name, __VA_ARGS__) \
+        }\
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS \
+        template<typename TestType> \
+        static void TestFunc()
+
+#if defined(CATCH_CPP17_OR_GREATER)
+#define CATCH_INTERNAL_CHECK_UNIQUE_TYPES(...) static_assert(Catch::is_unique<__VA_ARGS__>,"Duplicate type detected in declaration of template test case");
+#else
+#define CATCH_INTERNAL_CHECK_UNIQUE_TYPES(...) static_assert(Catch::is_unique<__VA_ARGS__>::value,"Duplicate type detected in declaration of template test case");
+#endif
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE(Name, Tags, ...) \
+        INTERNAL_CATCH_TEMPLATE_TEST_CASE_2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____F_U_N_C____ ), Name, Tags, __VA_ARGS__ )
+#else
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE(Name, Tags, ...) \
+        INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____F_U_N_C____ ), Name, Tags, __VA_ARGS__ ) )
+#endif
+
+    #define INTERNAL_CATCH_TEMPLATE_REGISTRY_INITIATE(TestName, Name, ...)\
+        static int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
+            TestName<CATCH_REC_LIST(INTERNAL_CATCH_REMOVE_PARENS, __VA_ARGS__)>(CATCH_REC_LIST_UD(INTERNAL_CATCH_TEMPLATE_UNIQUE_NAME,Name, __VA_ARGS__));\
+            return 0;\
+        }();
+
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_2( TestNameClass, TestName, ClassName, Name, Tags, ... ) \
+        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+        namespace{ \
+            template<typename TestType> \
+            struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName <TestType>) { \
+                void test();\
+            };\
+            template<typename...Types> \
+            struct TestNameClass{\
+                template<typename...Ts> \
+                TestNameClass(Ts...names){\
+                    CATCH_INTERNAL_CHECK_UNIQUE_TYPES(CATCH_REC_LIST(INTERNAL_CATCH_REMOVE_PARENS, __VA_ARGS__)) \
+                    using expander = int[];\
+                    (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestName<Types>::test ), CATCH_INTERNAL_LINEINFO, #ClassName, Catch::NameAndTags{ names, Tags } ), 0)... };/* NOLINT */ \
+                }\
+            };\
+            INTERNAL_CATCH_TEMPLATE_REGISTRY_INITIATE(TestNameClass, Name, __VA_ARGS__)\
+        }\
+        CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS\
+        template<typename TestType> \
+        void TestName<TestType>::test()
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( ClassName, Name, Tags,... ) \
+        INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____C_L_A_S_S____ ), INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) , ClassName, Name, Tags, __VA_ARGS__ )
+#else
+    #define INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( ClassName, Name, Tags,... ) \
+        INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_2( INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____C_L_A_S_S____ ), INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) , ClassName, Name, Tags, __VA_ARGS__ ) )
+#endif
+
+// end catch_test_registry.h
+// start catch_capture.hpp
+
+// start catch_assertionhandler.h
+
+// start catch_assertioninfo.h
+
+// start catch_result_type.h
+
+namespace Catch {
+
+    // ResultWas::OfType enum
+    struct ResultWas { enum OfType {
+        Unknown = -1,
+        Ok = 0,
+        Info = 1,
+        Warning = 2,
+
+        FailureBit = 0x10,
+
+        ExpressionFailed = FailureBit | 1,
+        ExplicitFailure = FailureBit | 2,
+
+        Exception = 0x100 | FailureBit,
+
+        ThrewException = Exception | 1,
+        DidntThrowException = Exception | 2,
+
+        FatalErrorCondition = 0x200 | FailureBit
+
+    }; };
+
+    bool isOk( ResultWas::OfType resultType );
+    bool isJustInfo( int flags );
+
+    // ResultDisposition::Flags enum
+    struct ResultDisposition { enum Flags {
+        Normal = 0x01,
+
+        ContinueOnFailure = 0x02,   // Failures fail test, but execution continues
+        FalseTest = 0x04,           // Prefix expression with !
+        SuppressFail = 0x08         // Failures are reported but do not fail the test
+    }; };
+
+    ResultDisposition::Flags operator | ( ResultDisposition::Flags lhs, ResultDisposition::Flags rhs );
+
+    bool shouldContinueOnFailure( int flags );
+    inline bool isFalseTest( int flags ) { return ( flags & ResultDisposition::FalseTest ) != 0; }
+    bool shouldSuppressFailure( int flags );
+
+} // end namespace Catch
+
+// end catch_result_type.h
+namespace Catch {
+
+    struct AssertionInfo
+    {
+        StringRef macroName;
+        SourceLineInfo lineInfo;
+        StringRef capturedExpression;
+        ResultDisposition::Flags resultDisposition;
+
+        // We want to delete this constructor but a compiler bug in 4.8 means
+        // the struct is then treated as non-aggregate
+        //AssertionInfo() = delete;
+    };
+
+} // end namespace Catch
+
+// end catch_assertioninfo.h
+// start catch_decomposer.h
+
+// start catch_tostring.h
+
+#include <vector>
+#include <cstddef>
+#include <type_traits>
+#include <string>
+// start catch_stream.h
+
+#include <iosfwd>
+#include <cstddef>
+#include <ostream>
+
+namespace Catch {
+
+    std::ostream& cout();
+    std::ostream& cerr();
+    std::ostream& clog();
+
+    class StringRef;
+
+    struct IStream {
+        virtual ~IStream();
+        virtual std::ostream& stream() const = 0;
+    };
+
+    auto makeStream( StringRef const &filename ) -> IStream const*;
+
+    class ReusableStringStream {
+        std::size_t m_index;
+        std::ostream* m_oss;
+    public:
+        ReusableStringStream();
+        ~ReusableStringStream();
+
+        auto str() const -> std::string;
+
+        template<typename T>
+        auto operator << ( T const& value ) -> ReusableStringStream& {
+            *m_oss << value;
+            return *this;
+        }
+        auto get() -> std::ostream& { return *m_oss; }
+    };
+}
+
+// end catch_stream.h
+
+#ifdef CATCH_CONFIG_CPP17_STRING_VIEW
+#include <string_view>
+#endif
+
+#ifdef __OBJC__
+// start catch_objc_arc.hpp
+
+#import <Foundation/Foundation.h>
+
+#ifdef __has_feature
+#define CATCH_ARC_ENABLED __has_feature(objc_arc)
+#else
+#define CATCH_ARC_ENABLED 0
+#endif
+
+void arcSafeRelease( NSObject* obj );
+id performOptionalSelector( id obj, SEL sel );
+
+#if !CATCH_ARC_ENABLED
+inline void arcSafeRelease( NSObject* obj ) {
+    [obj release];
+}
+inline id performOptionalSelector( id obj, SEL sel ) {
+    if( [obj respondsToSelector: sel] )
+        return [obj performSelector: sel];
+    return nil;
+}
+#define CATCH_UNSAFE_UNRETAINED
+#define CATCH_ARC_STRONG
+#else
+inline void arcSafeRelease( NSObject* ){}
+inline id performOptionalSelector( id obj, SEL sel ) {
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+#endif
+    if( [obj respondsToSelector: sel] )
+        return [obj performSelector: sel];
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+    return nil;
+}
+#define CATCH_UNSAFE_UNRETAINED __unsafe_unretained
+#define CATCH_ARC_STRONG __strong
+#endif
+
+// end catch_objc_arc.hpp
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4180) // We attempt to stream a function (address) by const&, which MSVC complains about but is harmless
+#endif
+
+namespace Catch {
+    namespace Detail {
+
+        extern const std::string unprintableString;
+
+        std::string rawMemoryToString( const void *object, std::size_t size );
+
+        template<typename T>
+        std::string rawMemoryToString( const T& object ) {
+          return rawMemoryToString( &object, sizeof(object) );
+        }
+
+        template<typename T>
+        class IsStreamInsertable {
+            template<typename SS, typename TT>
+            static auto test(int)
+                -> decltype(std::declval<SS&>() << std::declval<TT>(), std::true_type());
+
+            template<typename, typename>
+            static auto test(...)->std::false_type;
+
+        public:
+            static const bool value = decltype(test<std::ostream, const T&>(0))::value;
+        };
+
+        template<typename E>
+        std::string convertUnknownEnumToString( E e );
+
+        template<typename T>
+        typename std::enable_if<
+            !std::is_enum<T>::value && !std::is_base_of<std::exception, T>::value,
+        std::string>::type convertUnstreamable( T const& ) {
+            return Detail::unprintableString;
+        }
+        template<typename T>
+        typename std::enable_if<
+            !std::is_enum<T>::value && std::is_base_of<std::exception, T>::value,
+         std::string>::type convertUnstreamable(T const& ex) {
+            return ex.what();
+        }
+
+        template<typename T>
+        typename std::enable_if<
+            std::is_enum<T>::value
+        , std::string>::type convertUnstreamable( T const& value ) {
+            return convertUnknownEnumToString( value );
+        }
+
+#if defined(_MANAGED)
+        //! Convert a CLR string to a utf8 std::string
+        template<typename T>
+        std::string clrReferenceToString( T^ ref ) {
+            if (ref == nullptr)
+                return std::string("null");
+            auto bytes = System::Text::Encoding::UTF8->GetBytes(ref->ToString());
+            cli::pin_ptr<System::Byte> p = &bytes[0];
+            return std::string(reinterpret_cast<char const *>(p), bytes->Length);
+        }
+#endif
+
+    } // namespace Detail
+
+    // If we decide for C++14, change these to enable_if_ts
+    template <typename T, typename = void>
+    struct StringMaker {
+        template <typename Fake = T>
+        static
+        typename std::enable_if<::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
+            convert(const Fake& value) {
+                ReusableStringStream rss;
+                // NB: call using the function-like syntax to avoid ambiguity with
+                // user-defined templated operator<< under clang.
+                rss.operator<<(value);
+                return rss.str();
+        }
+
+        template <typename Fake = T>
+        static
+        typename std::enable_if<!::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
+            convert( const Fake& value ) {
+#if !defined(CATCH_CONFIG_FALLBACK_STRINGIFIER)
+            return Detail::convertUnstreamable(value);
+#else
+            return CATCH_CONFIG_FALLBACK_STRINGIFIER(value);
+#endif
+        }
+    };
+
+    namespace Detail {
+
+        // This function dispatches all stringification requests inside of Catch.
+        // Should be preferably called fully qualified, like ::Catch::Detail::stringify
+        template <typename T>
+        std::string stringify(const T& e) {
+            return ::Catch::StringMaker<typename std::remove_cv<typename std::remove_reference<T>::type>::type>::convert(e);
+        }
+
+        template<typename E>
+        std::string convertUnknownEnumToString( E e ) {
+            return ::Catch::Detail::stringify(static_cast<typename std::underlying_type<E>::type>(e));
+        }
+
+#if defined(_MANAGED)
+        template <typename T>
+        std::string stringify( T^ e ) {
+            return ::Catch::StringMaker<T^>::convert(e);
+        }
+#endif
+
+    } // namespace Detail
+
+    // Some predefined specializations
+
+    template<>
+    struct StringMaker<std::string> {
+        static std::string convert(const std::string& str);
+    };
+
+#ifdef CATCH_CONFIG_CPP17_STRING_VIEW
+    template<>
+    struct StringMaker<std::string_view> {
+        static std::string convert(std::string_view str);
+    };
+#endif
+
+    template<>
+    struct StringMaker<char const *> {
+        static std::string convert(char const * str);
+    };
+    template<>
+    struct StringMaker<char *> {
+        static std::string convert(char * str);
+    };
+
+#ifdef CATCH_CONFIG_WCHAR
+    template<>
+    struct StringMaker<std::wstring> {
+        static std::string convert(const std::wstring& wstr);
+    };
+
+# ifdef CATCH_CONFIG_CPP17_STRING_VIEW
+    template<>
+    struct StringMaker<std::wstring_view> {
+        static std::string convert(std::wstring_view str);
+    };
+# endif
+
+    template<>
+    struct StringMaker<wchar_t const *> {
+        static std::string convert(wchar_t const * str);
+    };
+    template<>
+    struct StringMaker<wchar_t *> {
+        static std::string convert(wchar_t * str);
+    };
+#endif
+
+    // TBD: Should we use `strnlen` to ensure that we don't go out of the buffer,
+    //      while keeping string semantics?
+    template<int SZ>
+    struct StringMaker<char[SZ]> {
+        static std::string convert(char const* str) {
+            return ::Catch::Detail::stringify(std::string{ str });
+        }
+    };
+    template<int SZ>
+    struct StringMaker<signed char[SZ]> {
+        static std::string convert(signed char const* str) {
+            return ::Catch::Detail::stringify(std::string{ reinterpret_cast<char const *>(str) });
+        }
+    };
+    template<int SZ>
+    struct StringMaker<unsigned char[SZ]> {
+        static std::string convert(unsigned char const* str) {
+            return ::Catch::Detail::stringify(std::string{ reinterpret_cast<char const *>(str) });
+        }
+    };
+
+    template<>
+    struct StringMaker<int> {
+        static std::string convert(int value);
+    };
+    template<>
+    struct StringMaker<long> {
+        static std::string convert(long value);
+    };
+    template<>
+    struct StringMaker<long long> {
+        static std::string convert(long long value);
+    };
+    template<>
+    struct StringMaker<unsigned int> {
+        static std::string convert(unsigned int value);
+    };
+    template<>
+    struct StringMaker<unsigned long> {
+        static std::string convert(unsigned long value);
+    };
+    template<>
+    struct StringMaker<unsigned long long> {
+        static std::string convert(unsigned long long value);
+    };
+
+    template<>
+    struct StringMaker<bool> {
+        static std::string convert(bool b);
+    };
+
+    template<>
+    struct StringMaker<char> {
+        static std::string convert(char c);
+    };
+    template<>
+    struct StringMaker<signed char> {
+        static std::string convert(signed char c);
+    };
+    template<>
+    struct StringMaker<unsigned char> {
+        static std::string convert(unsigned char c);
+    };
+
+    template<>
+    struct StringMaker<std::nullptr_t> {
+        static std::string convert(std::nullptr_t);
+    };
+
+    template<>
+    struct StringMaker<float> {
+        static std::string convert(float value);
+    };
+    template<>
+    struct StringMaker<double> {
+        static std::string convert(double value);
+    };
+
+    template <typename T>
+    struct StringMaker<T*> {
+        template <typename U>
+        static std::string convert(U* p) {
+            if (p) {
+                return ::Catch::Detail::rawMemoryToString(p);
+            } else {
+                return "nullptr";
+            }
+        }
+    };
+
+    template <typename R, typename C>
+    struct StringMaker<R C::*> {
+        static std::string convert(R C::* p) {
+            if (p) {
+                return ::Catch::Detail::rawMemoryToString(p);
+            } else {
+                return "nullptr";
+            }
+        }
+    };
+
+#if defined(_MANAGED)
+    template <typename T>
+    struct StringMaker<T^> {
+        static std::string convert( T^ ref ) {
+            return ::Catch::Detail::clrReferenceToString(ref);
+        }
+    };
+#endif
+
+    namespace Detail {
+        template<typename InputIterator>
+        std::string rangeToString(InputIterator first, InputIterator last) {
+            ReusableStringStream rss;
+            rss << "{ ";
+            if (first != last) {
+                rss << ::Catch::Detail::stringify(*first);
+                for (++first; first != last; ++first)
+                    rss << ", " << ::Catch::Detail::stringify(*first);
+            }
+            rss << " }";
+            return rss.str();
+        }
+    }
+
+#ifdef __OBJC__
+    template<>
+    struct StringMaker<NSString*> {
+        static std::string convert(NSString * nsstring) {
+            if (!nsstring)
+                return "nil";
+            return std::string("@") + [nsstring UTF8String];
+        }
+    };
+    template<>
+    struct StringMaker<NSObject*> {
+        static std::string convert(NSObject* nsObject) {
+            return ::Catch::Detail::stringify([nsObject description]);
+        }
+
+    };
+    namespace Detail {
+        inline std::string stringify( NSString* nsstring ) {
+            return StringMaker<NSString*>::convert( nsstring );
+        }
+
+    } // namespace Detail
+#endif // __OBJC__
+
+} // namespace Catch
+
+//////////////////////////////////////////////////////
+// Separate std-lib types stringification, so it can be selectively enabled
+// This means that we do not bring in
+
+#if defined(CATCH_CONFIG_ENABLE_ALL_STRINGMAKERS)
+#  define CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER
+#  define CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER
+#  define CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
+#  define CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
+#endif
+
+// Separate std::pair specialization
+#if defined(CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER)
+#include <utility>
+namespace Catch {
+    template<typename T1, typename T2>
+    struct StringMaker<std::pair<T1, T2> > {
+        static std::string convert(const std::pair<T1, T2>& pair) {
+            ReusableStringStream rss;
+            rss << "{ "
+                << ::Catch::Detail::stringify(pair.first)
+                << ", "
+                << ::Catch::Detail::stringify(pair.second)
+                << " }";
+            return rss.str();
+        }
+    };
+}
+#endif // CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER
+
+// Separate std::tuple specialization
+#if defined(CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER)
+#include <tuple>
+namespace Catch {
+    namespace Detail {
+        template<
+            typename Tuple,
+            std::size_t N = 0,
+            bool = (N < std::tuple_size<Tuple>::value)
+            >
+            struct TupleElementPrinter {
+            static void print(const Tuple& tuple, std::ostream& os) {
+                os << (N ? ", " : " ")
+                    << ::Catch::Detail::stringify(std::get<N>(tuple));
+                TupleElementPrinter<Tuple, N + 1>::print(tuple, os);
+            }
+        };
+
+        template<
+            typename Tuple,
+            std::size_t N
+        >
+            struct TupleElementPrinter<Tuple, N, false> {
+            static void print(const Tuple&, std::ostream&) {}
+        };
+
+    }
+
+    template<typename ...Types>
+    struct StringMaker<std::tuple<Types...>> {
+        static std::string convert(const std::tuple<Types...>& tuple) {
+            ReusableStringStream rss;
+            rss << '{';
+            Detail::TupleElementPrinter<std::tuple<Types...>>::print(tuple, rss.get());
+            rss << " }";
+            return rss.str();
+        }
+    };
+}
+#endif // CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER
+
+#if defined(CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER) && defined(CATCH_CONFIG_CPP17_VARIANT)
+#include <variant>
+namespace Catch {
+    template<>
+    struct StringMaker<std::monostate> {
+        static std::string convert(const std::monostate&) {
+            return "{ }";
+        }
+    };
+
+    template<typename... Elements>
+    struct StringMaker<std::variant<Elements...>> {
+        static std::string convert(const std::variant<Elements...>& variant) {
+            if (variant.valueless_by_exception()) {
+                return "{valueless variant}";
+            } else {
+                return std::visit(
+                    [](const auto& value) {
+                        return ::Catch::Detail::stringify(value);
+                    },
+                    variant
+                );
+            }
+        }
+    };
+}
+#endif // CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
+
+namespace Catch {
+    struct not_this_one {}; // Tag type for detecting which begin/ end are being selected
+
+    // Import begin/ end from std here so they are considered alongside the fallback (...) overloads in this namespace
+    using std::begin;
+    using std::end;
+
+    not_this_one begin( ... );
+    not_this_one end( ... );
+
+    template <typename T>
+    struct is_range {
+        static const bool value =
+            !std::is_same<decltype(begin(std::declval<T>())), not_this_one>::value &&
+            !std::is_same<decltype(end(std::declval<T>())), not_this_one>::value;
+    };
+
+#if defined(_MANAGED) // Managed types are never ranges
+    template <typename T>
+    struct is_range<T^> {
+        static const bool value = false;
+    };
+#endif
+
+    template<typename Range>
+    std::string rangeToString( Range const& range ) {
+        return ::Catch::Detail::rangeToString( begin( range ), end( range ) );
+    }
+
+    // Handle vector<bool> specially
+    template<typename Allocator>
+    std::string rangeToString( std::vector<bool, Allocator> const& v ) {
+        ReusableStringStream rss;
+        rss << "{ ";
+        bool first = true;
+        for( bool b : v ) {
+            if( first )
+                first = false;
+            else
+                rss << ", ";
+            rss << ::Catch::Detail::stringify( b );
+        }
+        rss << " }";
+        return rss.str();
+    }
+
+    template<typename R>
+    struct StringMaker<R, typename std::enable_if<is_range<R>::value && !::Catch::Detail::IsStreamInsertable<R>::value>::type> {
+        static std::string convert( R const& range ) {
+            return rangeToString( range );
+        }
+    };
+
+    template <typename T, int SZ>
+    struct StringMaker<T[SZ]> {
+        static std::string convert(T const(&arr)[SZ]) {
+            return rangeToString(arr);
+        }
+    };
+
+} // namespace Catch
+
+// Separate std::chrono::duration specialization
+#if defined(CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER)
+#include <ctime>
+#include <ratio>
+#include <chrono>
+
+namespace Catch {
+
+template <class Ratio>
+struct ratio_string {
+    static std::string symbol();
+};
+
+template <class Ratio>
+std::string ratio_string<Ratio>::symbol() {
+    Catch::ReusableStringStream rss;
+    rss << '[' << Ratio::num << '/'
+        << Ratio::den << ']';
+    return rss.str();
+}
+template <>
+struct ratio_string<std::atto> {
+    static std::string symbol();
+};
+template <>
+struct ratio_string<std::femto> {
+    static std::string symbol();
+};
+template <>
+struct ratio_string<std::pico> {
+    static std::string symbol();
+};
+template <>
+struct ratio_string<std::nano> {
+    static std::string symbol();
+};
+template <>
+struct ratio_string<std::micro> {
+    static std::string symbol();
+};
+template <>
+struct ratio_string<std::milli> {
+    static std::string symbol();
+};
+
+    ////////////
+    // std::chrono::duration specializations
+    template<typename Value, typename Ratio>
+    struct StringMaker<std::chrono::duration<Value, Ratio>> {
+        static std::string convert(std::chrono::duration<Value, Ratio> const& duration) {
+            ReusableStringStream rss;
+            rss << duration.count() << ' ' << ratio_string<Ratio>::symbol() << 's';
+            return rss.str();
+        }
+    };
+    template<typename Value>
+    struct StringMaker<std::chrono::duration<Value, std::ratio<1>>> {
+        static std::string convert(std::chrono::duration<Value, std::ratio<1>> const& duration) {
+            ReusableStringStream rss;
+            rss << duration.count() << " s";
+            return rss.str();
+        }
+    };
+    template<typename Value>
+    struct StringMaker<std::chrono::duration<Value, std::ratio<60>>> {
+        static std::string convert(std::chrono::duration<Value, std::ratio<60>> const& duration) {
+            ReusableStringStream rss;
+            rss << duration.count() << " m";
+            return rss.str();
+        }
+    };
+    template<typename Value>
+    struct StringMaker<std::chrono::duration<Value, std::ratio<3600>>> {
+        static std::string convert(std::chrono::duration<Value, std::ratio<3600>> const& duration) {
+            ReusableStringStream rss;
+            rss << duration.count() << " h";
+            return rss.str();
+        }
+    };
+
+    ////////////
+    // std::chrono::time_point specialization
+    // Generic time_point cannot be specialized, only std::chrono::time_point<system_clock>
+    template<typename Clock, typename Duration>
+    struct StringMaker<std::chrono::time_point<Clock, Duration>> {
+        static std::string convert(std::chrono::time_point<Clock, Duration> const& time_point) {
+            return ::Catch::Detail::stringify(time_point.time_since_epoch()) + " since epoch";
+        }
+    };
+    // std::chrono::time_point<system_clock> specialization
+    template<typename Duration>
+    struct StringMaker<std::chrono::time_point<std::chrono::system_clock, Duration>> {
+        static std::string convert(std::chrono::time_point<std::chrono::system_clock, Duration> const& time_point) {
+            auto converted = std::chrono::system_clock::to_time_t(time_point);
+
+#ifdef _MSC_VER
+            std::tm timeInfo = {};
+            gmtime_s(&timeInfo, &converted);
+#else
+            std::tm* timeInfo = std::gmtime(&converted);
+#endif
+
+            auto const timeStampSize = sizeof("2017-01-16T17:06:45Z");
+            char timeStamp[timeStampSize];
+            const char * const fmt = "%Y-%m-%dT%H:%M:%SZ";
+
+#ifdef _MSC_VER
+            std::strftime(timeStamp, timeStampSize, fmt, &timeInfo);
+#else
+            std::strftime(timeStamp, timeStampSize, fmt, timeInfo);
+#endif
+            return std::string(timeStamp);
+        }
+    };
+}
+#endif // CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+// end catch_tostring.h
+#include <iosfwd>
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4389) // '==' : signed/unsigned mismatch
+#pragma warning(disable:4018) // more "signed/unsigned mismatch"
+#pragma warning(disable:4312) // Converting int to T* using reinterpret_cast (issue on x64 platform)
+#pragma warning(disable:4180) // qualifier applied to function type has no meaning
+#endif
+
+namespace Catch {
+
+    struct ITransientExpression {
+        auto isBinaryExpression() const -> bool { return m_isBinaryExpression; }
+        auto getResult() const -> bool { return m_result; }
+        virtual void streamReconstructedExpression( std::ostream &os ) const = 0;
+
+        ITransientExpression( bool isBinaryExpression, bool result )
+        :   m_isBinaryExpression( isBinaryExpression ),
+            m_result( result )
+        {}
+
+        // We don't actually need a virtual destructor, but many static analysers
+        // complain if it's not here :-(
+        virtual ~ITransientExpression();
+
+        bool m_isBinaryExpression;
+        bool m_result;
+
+    };
+
+    void formatReconstructedExpression( std::ostream &os, std::string const& lhs, StringRef op, std::string const& rhs );
+
+    template<typename LhsT, typename RhsT>
+    class BinaryExpr  : public ITransientExpression {
+        LhsT m_lhs;
+        StringRef m_op;
+        RhsT m_rhs;
+
+        void streamReconstructedExpression( std::ostream &os ) const override {
+            formatReconstructedExpression
+                    ( os, Catch::Detail::stringify( m_lhs ), m_op, Catch::Detail::stringify( m_rhs ) );
+        }
+
+    public:
+        BinaryExpr( bool comparisonResult, LhsT lhs, StringRef op, RhsT rhs )
+        :   ITransientExpression{ true, comparisonResult },
+            m_lhs( lhs ),
+            m_op( op ),
+            m_rhs( rhs )
+        {}
+    };
+
+    template<typename LhsT>
+    class UnaryExpr : public ITransientExpression {
+        LhsT m_lhs;
+
+        void streamReconstructedExpression( std::ostream &os ) const override {
+            os << Catch::Detail::stringify( m_lhs );
+        }
+
+    public:
+        explicit UnaryExpr( LhsT lhs )
+        :   ITransientExpression{ false, lhs ? true : false },
+            m_lhs( lhs )
+        {}
+    };
+
+    // Specialised comparison functions to handle equality comparisons between ints and pointers (NULL deduces as an int)
+    template<typename LhsT, typename RhsT>
+    auto compareEqual( LhsT const& lhs, RhsT const& rhs ) -> bool { return static_cast<bool>(lhs == rhs); }
+    template<typename T>
+    auto compareEqual( T* const& lhs, int rhs ) -> bool { return lhs == reinterpret_cast<void const*>( rhs ); }
+    template<typename T>
+    auto compareEqual( T* const& lhs, long rhs ) -> bool { return lhs == reinterpret_cast<void const*>( rhs ); }
+    template<typename T>
+    auto compareEqual( int lhs, T* const& rhs ) -> bool { return reinterpret_cast<void const*>( lhs ) == rhs; }
+    template<typename T>
+    auto compareEqual( long lhs, T* const& rhs ) -> bool { return reinterpret_cast<void const*>( lhs ) == rhs; }
+
+    template<typename LhsT, typename RhsT>
+    auto compareNotEqual( LhsT const& lhs, RhsT&& rhs ) -> bool { return static_cast<bool>(lhs != rhs); }
+    template<typename T>
+    auto compareNotEqual( T* const& lhs, int rhs ) -> bool { return lhs != reinterpret_cast<void const*>( rhs ); }
+    template<typename T>
+    auto compareNotEqual( T* const& lhs, long rhs ) -> bool { return lhs != reinterpret_cast<void const*>( rhs ); }
+    template<typename T>
+    auto compareNotEqual( int lhs, T* const& rhs ) -> bool { return reinterpret_cast<void const*>( lhs ) != rhs; }
+    template<typename T>
+    auto compareNotEqual( long lhs, T* const& rhs ) -> bool { return reinterpret_cast<void const*>( lhs ) != rhs; }
+
+    template<typename LhsT>
+    class ExprLhs {
+        LhsT m_lhs;
+    public:
+        explicit ExprLhs( LhsT lhs ) : m_lhs( lhs ) {}
+
+        template<typename RhsT>
+        auto operator == ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { compareEqual( m_lhs, rhs ), m_lhs, "==", rhs };
+        }
+        auto operator == ( bool rhs ) -> BinaryExpr<LhsT, bool> const {
+            return { m_lhs == rhs, m_lhs, "==", rhs };
+        }
+
+        template<typename RhsT>
+        auto operator != ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { compareNotEqual( m_lhs, rhs ), m_lhs, "!=", rhs };
+        }
+        auto operator != ( bool rhs ) -> BinaryExpr<LhsT, bool> const {
+            return { m_lhs != rhs, m_lhs, "!=", rhs };
+        }
+
+        template<typename RhsT>
+        auto operator > ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { static_cast<bool>(m_lhs > rhs), m_lhs, ">", rhs };
+        }
+        template<typename RhsT>
+        auto operator < ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { static_cast<bool>(m_lhs < rhs), m_lhs, "<", rhs };
+        }
+        template<typename RhsT>
+        auto operator >= ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { static_cast<bool>(m_lhs >= rhs), m_lhs, ">=", rhs };
+        }
+        template<typename RhsT>
+        auto operator <= ( RhsT const& rhs ) -> BinaryExpr<LhsT, RhsT const&> const {
+            return { static_cast<bool>(m_lhs <= rhs), m_lhs, "<=", rhs };
+        }
+
+        auto makeUnaryExpr() const -> UnaryExpr<LhsT> {
+            return UnaryExpr<LhsT>{ m_lhs };
+        }
+    };
+
+    void handleExpression( ITransientExpression const& expr );
+
+    template<typename T>
+    void handleExpression( ExprLhs<T> const& expr ) {
+        handleExpression( expr.makeUnaryExpr() );
+    }
+
+    struct Decomposer {
+        template<typename T>
+        auto operator <= ( T const& lhs ) -> ExprLhs<T const&> {
+            return ExprLhs<T const&>{ lhs };
+        }
+
+        auto operator <=( bool value ) -> ExprLhs<bool> {
+            return ExprLhs<bool>{ value };
+        }
+    };
+
+} // end namespace Catch
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+// end catch_decomposer.h
+// start catch_interfaces_capture.h
+
+#include <string>
+
+namespace Catch {
+
+    class AssertionResult;
+    struct AssertionInfo;
+    struct SectionInfo;
+    struct SectionEndInfo;
+    struct MessageInfo;
+    struct Counts;
+    struct BenchmarkInfo;
+    struct BenchmarkStats;
+    struct AssertionReaction;
+    struct SourceLineInfo;
+
+    struct ITransientExpression;
+    struct IGeneratorTracker;
+
+    struct IResultCapture {
+
+        virtual ~IResultCapture();
+
+        virtual bool sectionStarted(    SectionInfo const& sectionInfo,
+                                        Counts& assertions ) = 0;
+        virtual void sectionEnded( SectionEndInfo const& endInfo ) = 0;
+        virtual void sectionEndedEarly( SectionEndInfo const& endInfo ) = 0;
+
+        virtual auto acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker& = 0;
+
+        virtual void benchmarkStarting( BenchmarkInfo const& info ) = 0;
+        virtual void benchmarkEnded( BenchmarkStats const& stats ) = 0;
+
+        virtual void pushScopedMessage( MessageInfo const& message ) = 0;
+        virtual void popScopedMessage( MessageInfo const& message ) = 0;
+
+        virtual void handleFatalErrorCondition( StringRef message ) = 0;
+
+        virtual void handleExpr
+                (   AssertionInfo const& info,
+                    ITransientExpression const& expr,
+                    AssertionReaction& reaction ) = 0;
+        virtual void handleMessage
+                (   AssertionInfo const& info,
+                    ResultWas::OfType resultType,
+                    StringRef const& message,
+                    AssertionReaction& reaction ) = 0;
+        virtual void handleUnexpectedExceptionNotThrown
+                (   AssertionInfo const& info,
+                    AssertionReaction& reaction ) = 0;
+        virtual void handleUnexpectedInflightException
+                (   AssertionInfo const& info,
+                    std::string const& message,
+                    AssertionReaction& reaction ) = 0;
+        virtual void handleIncomplete
+                (   AssertionInfo const& info ) = 0;
+        virtual void handleNonExpr
+                (   AssertionInfo const &info,
+                    ResultWas::OfType resultType,
+                    AssertionReaction &reaction ) = 0;
+
+        virtual bool lastAssertionPassed() = 0;
+        virtual void assertionPassed() = 0;
+
+        // Deprecated, do not use:
+        virtual std::string getCurrentTestName() const = 0;
+        virtual const AssertionResult* getLastResult() const = 0;
+        virtual void exceptionEarlyReported() = 0;
+    };
+
+    IResultCapture& getResultCapture();
+}
+
+// end catch_interfaces_capture.h
+namespace Catch {
+
+    struct TestFailureException{};
+    struct AssertionResultData;
+    struct IResultCapture;
+    class RunContext;
+
+    class LazyExpression {
+        friend class AssertionHandler;
+        friend struct AssertionStats;
+        friend class RunContext;
+
+        ITransientExpression const* m_transientExpression = nullptr;
+        bool m_isNegated;
+    public:
+        LazyExpression( bool isNegated );
+        LazyExpression( LazyExpression const& other );
+        LazyExpression& operator = ( LazyExpression const& ) = delete;
+
+        explicit operator bool() const;
+
+        friend auto operator << ( std::ostream& os, LazyExpression const& lazyExpr ) -> std::ostream&;
+    };
+
+    struct AssertionReaction {
+        bool shouldDebugBreak = false;
+        bool shouldThrow = false;
+    };
+
+    class AssertionHandler {
+        AssertionInfo m_assertionInfo;
+        AssertionReaction m_reaction;
+        bool m_completed = false;
+        IResultCapture& m_resultCapture;
+
+    public:
+        AssertionHandler
+            (   StringRef const& macroName,
+                SourceLineInfo const& lineInfo,
+                StringRef capturedExpression,
+                ResultDisposition::Flags resultDisposition );
+        ~AssertionHandler() {
+            if ( !m_completed ) {
+                m_resultCapture.handleIncomplete( m_assertionInfo );
+            }
+        }
+
+        template<typename T>
+        void handleExpr( ExprLhs<T> const& expr ) {
+            handleExpr( expr.makeUnaryExpr() );
+        }
+        void handleExpr( ITransientExpression const& expr );
+
+        void handleMessage(ResultWas::OfType resultType, StringRef const& message);
+
+        void handleExceptionThrownAsExpected();
+        void handleUnexpectedExceptionNotThrown();
+        void handleExceptionNotThrownAsExpected();
+        void handleThrowingCallSkipped();
+        void handleUnexpectedInflightException();
+
+        void complete();
+        void setCompleted();
+
+        // query
+        auto allowThrows() const -> bool;
+    };
+
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef const& matcherString );
+
+} // namespace Catch
+
+// end catch_assertionhandler.h
+// start catch_message.h
+
+#include <string>
+#include <vector>
+
+namespace Catch {
+
+    struct MessageInfo {
+        MessageInfo(    StringRef const& _macroName,
+                        SourceLineInfo const& _lineInfo,
+                        ResultWas::OfType _type );
+
+        StringRef macroName;
+        std::string message;
+        SourceLineInfo lineInfo;
+        ResultWas::OfType type;
+        unsigned int sequence;
+
+        bool operator == ( MessageInfo const& other ) const;
+        bool operator < ( MessageInfo const& other ) const;
+    private:
+        static unsigned int globalCount;
+    };
+
+    struct MessageStream {
+
+        template<typename T>
+        MessageStream& operator << ( T const& value ) {
+            m_stream << value;
+            return *this;
+        }
+
+        ReusableStringStream m_stream;
+    };
+
+    struct MessageBuilder : MessageStream {
+        MessageBuilder( StringRef const& macroName,
+                        SourceLineInfo const& lineInfo,
+                        ResultWas::OfType type );
+
+        template<typename T>
+        MessageBuilder& operator << ( T const& value ) {
+            m_stream << value;
+            return *this;
+        }
+
+        MessageInfo m_info;
+    };
+
+    class ScopedMessage {
+    public:
+        explicit ScopedMessage( MessageBuilder const& builder );
+        ~ScopedMessage();
+
+        MessageInfo m_info;
+    };
+
+    class Capturer {
+        std::vector<MessageInfo> m_messages;
+        IResultCapture& m_resultCapture = getResultCapture();
+        size_t m_captured = 0;
+    public:
+        Capturer( StringRef macroName, SourceLineInfo const& lineInfo, ResultWas::OfType resultType, StringRef names );
+        ~Capturer();
+
+        void captureValue( size_t index, std::string const& value );
+
+        template<typename T>
+        void captureValues( size_t index, T const& value ) {
+            captureValue( index, Catch::Detail::stringify( value ) );
+        }
+
+        template<typename T, typename... Ts>
+        void captureValues( size_t index, T const& value, Ts const&... values ) {
+            captureValue( index, Catch::Detail::stringify(value) );
+            captureValues( index+1, values... );
+        }
+    };
+
+} // end namespace Catch
+
+// end catch_message.h
+#if !defined(CATCH_CONFIG_DISABLE)
+
+#if !defined(CATCH_CONFIG_DISABLE_STRINGIFICATION)
+  #define CATCH_INTERNAL_STRINGIFY(...) #__VA_ARGS__
+#else
+  #define CATCH_INTERNAL_STRINGIFY(...) "Disabled by CATCH_CONFIG_DISABLE_STRINGIFICATION"
+#endif
+
+#if defined(CATCH_CONFIG_FAST_COMPILE) || defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+
+///////////////////////////////////////////////////////////////////////////////
+// Another way to speed-up compilation is to omit local try-catch for REQUIRE*
+// macros.
+#define INTERNAL_CATCH_TRY
+#define INTERNAL_CATCH_CATCH( capturer )
+
+#else // CATCH_CONFIG_FAST_COMPILE
+
+#define INTERNAL_CATCH_TRY try
+#define INTERNAL_CATCH_CATCH( handler ) catch(...) { handler.handleUnexpectedInflightException(); }
+
+#endif
+
+#define INTERNAL_CATCH_REACT( handler ) handler.complete();
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_TEST( macroName, resultDisposition, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(__VA_ARGS__), resultDisposition ); \
+        INTERNAL_CATCH_TRY { \
+            CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS \
+            catchAssertionHandler.handleExpr( Catch::Decomposer() <= __VA_ARGS__ ); \
+            CATCH_INTERNAL_UNSUPPRESS_PARENTHESES_WARNINGS \
+        } INTERNAL_CATCH_CATCH( catchAssertionHandler ) \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( (void)0, false && static_cast<bool>( !!(__VA_ARGS__) ) ) // the expression here is never evaluated at runtime but it forces the compiler to give it a look
+    // The double negation silences MSVC's C4800 warning, the static_cast forces short-circuit evaluation if the type has overloaded &&.
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_IF( macroName, resultDisposition, ... ) \
+    INTERNAL_CATCH_TEST( macroName, resultDisposition, __VA_ARGS__ ); \
+    if( Catch::getResultCapture().lastAssertionPassed() )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_ELSE( macroName, resultDisposition, ... ) \
+    INTERNAL_CATCH_TEST( macroName, resultDisposition, __VA_ARGS__ ); \
+    if( !Catch::getResultCapture().lastAssertionPassed() )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_NO_THROW( macroName, resultDisposition, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(__VA_ARGS__), resultDisposition ); \
+        try { \
+            static_cast<void>(__VA_ARGS__); \
+            catchAssertionHandler.handleExceptionNotThrownAsExpected(); \
+        } \
+        catch( ... ) { \
+            catchAssertionHandler.handleUnexpectedInflightException(); \
+        } \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_THROWS( macroName, resultDisposition, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(__VA_ARGS__), resultDisposition); \
+        if( catchAssertionHandler.allowThrows() ) \
+            try { \
+                static_cast<void>(__VA_ARGS__); \
+                catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
+            } \
+            catch( ... ) { \
+                catchAssertionHandler.handleExceptionThrownAsExpected(); \
+            } \
+        else \
+            catchAssertionHandler.handleThrowingCallSkipped(); \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_THROWS_AS( macroName, exceptionType, resultDisposition, expr ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr) ", " CATCH_INTERNAL_STRINGIFY(exceptionType), resultDisposition ); \
+        if( catchAssertionHandler.allowThrows() ) \
+            try { \
+                static_cast<void>(expr); \
+                catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
+            } \
+            catch( exceptionType const& ) { \
+                catchAssertionHandler.handleExceptionThrownAsExpected(); \
+            } \
+            catch( ... ) { \
+                catchAssertionHandler.handleUnexpectedInflightException(); \
+            } \
+        else \
+            catchAssertionHandler.handleThrowingCallSkipped(); \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_MSG( macroName, messageType, resultDisposition, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, Catch::StringRef(), resultDisposition ); \
+        catchAssertionHandler.handleMessage( messageType, ( Catch::MessageStream() << __VA_ARGS__ + ::Catch::StreamEndStop() ).m_stream.str() ); \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_CAPTURE( varName, macroName, ... ) \
+    auto varName = Catch::Capturer( macroName, CATCH_INTERNAL_LINEINFO, Catch::ResultWas::Info, #__VA_ARGS__ ); \
+    varName.captureValues( 0, __VA_ARGS__ )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_INFO( macroName, log ) \
+    Catch::ScopedMessage INTERNAL_CATCH_UNIQUE_NAME( scopedMessage )( Catch::MessageBuilder( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, Catch::ResultWas::Info ) << log );
+
+///////////////////////////////////////////////////////////////////////////////
+// Although this is matcher-based, it can be used with just a string
+#define INTERNAL_CATCH_THROWS_STR_MATCHES( macroName, resultDisposition, matcher, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(__VA_ARGS__) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
+        if( catchAssertionHandler.allowThrows() ) \
+            try { \
+                static_cast<void>(__VA_ARGS__); \
+                catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
+            } \
+            catch( ... ) { \
+                Catch::handleExceptionMatchExpr( catchAssertionHandler, matcher, #matcher##_catch_sr ); \
+            } \
+        else \
+            catchAssertionHandler.handleThrowingCallSkipped(); \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+#endif // CATCH_CONFIG_DISABLE
+
+// end catch_capture.hpp
+// start catch_section.h
+
+// start catch_section_info.h
+
+// start catch_totals.h
+
+#include <cstddef>
+
+namespace Catch {
+
+    struct Counts {
+        Counts operator - ( Counts const& other ) const;
+        Counts& operator += ( Counts const& other );
+
+        std::size_t total() const;
+        bool allPassed() const;
+        bool allOk() const;
+
+        std::size_t passed = 0;
+        std::size_t failed = 0;
+        std::size_t failedButOk = 0;
+    };
+
+    struct Totals {
+
+        Totals operator - ( Totals const& other ) const;
+        Totals& operator += ( Totals const& other );
+
+        Totals delta( Totals const& prevTotals ) const;
+
+        int error = 0;
+        Counts assertions;
+        Counts testCases;
+    };
+}
+
+// end catch_totals.h
+#include <string>
+
+namespace Catch {
+
+    struct SectionInfo {
+        SectionInfo
+            (   SourceLineInfo const& _lineInfo,
+                std::string const& _name );
+
+        // Deprecated
+        SectionInfo
+            (   SourceLineInfo const& _lineInfo,
+                std::string const& _name,
+                std::string const& ) : SectionInfo( _lineInfo, _name ) {}
+
+        std::string name;
+        std::string description; // !Deprecated: this will always be empty
+        SourceLineInfo lineInfo;
+    };
+
+    struct SectionEndInfo {
+        SectionInfo sectionInfo;
+        Counts prevAssertions;
+        double durationInSeconds;
+    };
+
+} // end namespace Catch
+
+// end catch_section_info.h
+// start catch_timer.h
+
+#include <cstdint>
+
+namespace Catch {
+
+    auto getCurrentNanosecondsSinceEpoch() -> uint64_t;
+    auto getEstimatedClockResolution() -> uint64_t;
+
+    class Timer {
+        uint64_t m_nanoseconds = 0;
+    public:
+        void start();
+        auto getElapsedNanoseconds() const -> uint64_t;
+        auto getElapsedMicroseconds() const -> uint64_t;
+        auto getElapsedMilliseconds() const -> unsigned int;
+        auto getElapsedSeconds() const -> double;
+    };
+
+} // namespace Catch
+
+// end catch_timer.h
+#include <string>
+
+namespace Catch {
+
+    class Section : NonCopyable {
+    public:
+        Section( SectionInfo const& info );
+        ~Section();
+
+        // This indicates whether the section should be executed or not
+        explicit operator bool() const;
+
+    private:
+        SectionInfo m_info;
+
+        std::string m_name;
+        Counts m_assertions;
+        bool m_sectionIncluded;
+        Timer m_timer;
+    };
+
+} // end namespace Catch
+
+#define INTERNAL_CATCH_SECTION( ... ) \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_WARNINGS \
+    if( Catch::Section const& INTERNAL_CATCH_UNIQUE_NAME( catch_internal_Section ) = Catch::SectionInfo( CATCH_INTERNAL_LINEINFO, __VA_ARGS__ ) ) \
+    CATCH_INTERNAL_UNSUPPRESS_UNUSED_WARNINGS
+
+#define INTERNAL_CATCH_DYNAMIC_SECTION( ... ) \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_WARNINGS \
+    if( Catch::Section const& INTERNAL_CATCH_UNIQUE_NAME( catch_internal_Section ) = Catch::SectionInfo( CATCH_INTERNAL_LINEINFO, (Catch::ReusableStringStream() << __VA_ARGS__).str() ) ) \
+    CATCH_INTERNAL_UNSUPPRESS_UNUSED_WARNINGS
+
+// end catch_section.h
+// start catch_benchmark.h
+
+#include <cstdint>
+#include <string>
+
+namespace Catch {
+
+    class BenchmarkLooper {
+
+        std::string m_name;
+        std::size_t m_count = 0;
+        std::size_t m_iterationsToRun = 1;
+        uint64_t m_resolution;
+        Timer m_timer;
+
+        static auto getResolution() -> uint64_t;
+    public:
+        // Keep most of this inline as it's on the code path that is being timed
+        BenchmarkLooper( StringRef name )
+        :   m_name( name ),
+            m_resolution( getResolution() )
+        {
+            reportStart();
+            m_timer.start();
+        }
+
+        explicit operator bool() {
+            if( m_count < m_iterationsToRun )
+                return true;
+            return needsMoreIterations();
+        }
+
+        void increment() {
+            ++m_count;
+        }
+
+        void reportStart();
+        auto needsMoreIterations() -> bool;
+    };
+
+} // end namespace Catch
+
+#define BENCHMARK( name ) \
+    for( Catch::BenchmarkLooper looper( name ); looper; looper.increment() )
+
+// end catch_benchmark.h
+// start catch_interfaces_exception.h
+
+// start catch_interfaces_registry_hub.h
+
+#include <string>
+#include <memory>
+
+namespace Catch {
+
+    class TestCase;
+    struct ITestCaseRegistry;
+    struct IExceptionTranslatorRegistry;
+    struct IExceptionTranslator;
+    struct IReporterRegistry;
+    struct IReporterFactory;
+    struct ITagAliasRegistry;
+    class StartupExceptionRegistry;
+
+    using IReporterFactoryPtr = std::shared_ptr<IReporterFactory>;
+
+    struct IRegistryHub {
+        virtual ~IRegistryHub();
+
+        virtual IReporterRegistry const& getReporterRegistry() const = 0;
+        virtual ITestCaseRegistry const& getTestCaseRegistry() const = 0;
+        virtual ITagAliasRegistry const& getTagAliasRegistry() const = 0;
+
+        virtual IExceptionTranslatorRegistry const& getExceptionTranslatorRegistry() const = 0;
+
+        virtual StartupExceptionRegistry const& getStartupExceptionRegistry() const = 0;
+    };
+
+    struct IMutableRegistryHub {
+        virtual ~IMutableRegistryHub();
+        virtual void registerReporter( std::string const& name, IReporterFactoryPtr const& factory ) = 0;
+        virtual void registerListener( IReporterFactoryPtr const& factory ) = 0;
+        virtual void registerTest( TestCase const& testInfo ) = 0;
+        virtual void registerTranslator( const IExceptionTranslator* translator ) = 0;
+        virtual void registerTagAlias( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo ) = 0;
+        virtual void registerStartupException() noexcept = 0;
+    };
+
+    IRegistryHub const& getRegistryHub();
+    IMutableRegistryHub& getMutableRegistryHub();
+    void cleanUp();
+    std::string translateActiveException();
+
+}
+
+// end catch_interfaces_registry_hub.h
+#if defined(CATCH_CONFIG_DISABLE)
+    #define INTERNAL_CATCH_TRANSLATE_EXCEPTION_NO_REG( translatorName, signature) \
+        static std::string translatorName( signature )
+#endif
+
+#include <exception>
+#include <string>
+#include <vector>
+
+namespace Catch {
+    using exceptionTranslateFunction = std::string(*)();
+
+    struct IExceptionTranslator;
+    using ExceptionTranslators = std::vector<std::unique_ptr<IExceptionTranslator const>>;
+
+    struct IExceptionTranslator {
+        virtual ~IExceptionTranslator();
+        virtual std::string translate( ExceptionTranslators::const_iterator it, ExceptionTranslators::const_iterator itEnd ) const = 0;
+    };
+
+    struct IExceptionTranslatorRegistry {
+        virtual ~IExceptionTranslatorRegistry();
+
+        virtual std::string translateActiveException() const = 0;
+    };
+
+    class ExceptionTranslatorRegistrar {
+        template<typename T>
+        class ExceptionTranslator : public IExceptionTranslator {
+        public:
+
+            ExceptionTranslator( std::string(*translateFunction)( T& ) )
+            : m_translateFunction( translateFunction )
+            {}
+
+            std::string translate( ExceptionTranslators::const_iterator it, ExceptionTranslators::const_iterator itEnd ) const override {
+                try {
+                    if( it == itEnd )
+                        std::rethrow_exception(std::current_exception());
+                    else
+                        return (*it)->translate( it+1, itEnd );
+                }
+                catch( T& ex ) {
+                    return m_translateFunction( ex );
+                }
+            }
+
+        protected:
+            std::string(*m_translateFunction)( T& );
+        };
+
+    public:
+        template<typename T>
+        ExceptionTranslatorRegistrar( std::string(*translateFunction)( T& ) ) {
+            getMutableRegistryHub().registerTranslator
+                ( new ExceptionTranslator<T>( translateFunction ) );
+        }
+    };
+}
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_TRANSLATE_EXCEPTION2( translatorName, signature ) \
+    static std::string translatorName( signature ); \
+    CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+    namespace{ Catch::ExceptionTranslatorRegistrar INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionRegistrar )( &translatorName ); } \
+    CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS \
+    static std::string translatorName( signature )
+
+#define INTERNAL_CATCH_TRANSLATE_EXCEPTION( signature ) INTERNAL_CATCH_TRANSLATE_EXCEPTION2( INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionTranslator ), signature )
+
+// end catch_interfaces_exception.h
+// start catch_approx.h
+
+#include <type_traits>
+
+namespace Catch {
+namespace Detail {
+
+    class Approx {
+    private:
+        bool equalityComparisonImpl(double other) const;
+        // Validates the new margin (margin >= 0)
+        // out-of-line to avoid including stdexcept in the header
+        void setMargin(double margin);
+        // Validates the new epsilon (0 < epsilon < 1)
+        // out-of-line to avoid including stdexcept in the header
+        void setEpsilon(double epsilon);
+
+    public:
+        explicit Approx ( double value );
+
+        static Approx custom();
+
+        Approx operator-() const;
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        Approx operator()( T const& value ) {
+            Approx approx( static_cast<double>(value) );
+            approx.m_epsilon = m_epsilon;
+            approx.m_margin = m_margin;
+            approx.m_scale = m_scale;
+            return approx;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        explicit Approx( T const& value ): Approx(static_cast<double>(value))
+        {}
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator == ( const T& lhs, Approx const& rhs ) {
+            auto lhs_v = static_cast<double>(lhs);
+            return rhs.equalityComparisonImpl(lhs_v);
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator == ( Approx const& lhs, const T& rhs ) {
+            return operator==( rhs, lhs );
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator != ( T const& lhs, Approx const& rhs ) {
+            return !operator==( lhs, rhs );
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator != ( Approx const& lhs, T const& rhs ) {
+            return !operator==( rhs, lhs );
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator <= ( T const& lhs, Approx const& rhs ) {
+            return static_cast<double>(lhs) < rhs.m_value || lhs == rhs;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator <= ( Approx const& lhs, T const& rhs ) {
+            return lhs.m_value < static_cast<double>(rhs) || lhs == rhs;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator >= ( T const& lhs, Approx const& rhs ) {
+            return static_cast<double>(lhs) > rhs.m_value || lhs == rhs;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        friend bool operator >= ( Approx const& lhs, T const& rhs ) {
+            return lhs.m_value > static_cast<double>(rhs) || lhs == rhs;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        Approx& epsilon( T const& newEpsilon ) {
+            double epsilonAsDouble = static_cast<double>(newEpsilon);
+            setEpsilon(epsilonAsDouble);
+            return *this;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        Approx& margin( T const& newMargin ) {
+            double marginAsDouble = static_cast<double>(newMargin);
+            setMargin(marginAsDouble);
+            return *this;
+        }
+
+        template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
+        Approx& scale( T const& newScale ) {
+            m_scale = static_cast<double>(newScale);
+            return *this;
+        }
+
+        std::string toString() const;
+
+    private:
+        double m_epsilon;
+        double m_margin;
+        double m_scale;
+        double m_value;
+    };
+} // end namespace Detail
+
+namespace literals {
+    Detail::Approx operator "" _a(long double val);
+    Detail::Approx operator "" _a(unsigned long long val);
+} // end namespace literals
+
+template<>
+struct StringMaker<Catch::Detail::Approx> {
+    static std::string convert(Catch::Detail::Approx const& value);
+};
+
+} // end namespace Catch
+
+// end catch_approx.h
+// start catch_string_manip.h
+
+#include <string>
+#include <iosfwd>
+
+namespace Catch {
+
+    bool startsWith( std::string const& s, std::string const& prefix );
+    bool startsWith( std::string const& s, char prefix );
+    bool endsWith( std::string const& s, std::string const& suffix );
+    bool endsWith( std::string const& s, char suffix );
+    bool contains( std::string const& s, std::string const& infix );
+    void toLowerInPlace( std::string& s );
+    std::string toLower( std::string const& s );
+    std::string trim( std::string const& str );
+    bool replaceInPlace( std::string& str, std::string const& replaceThis, std::string const& withThis );
+
+    struct pluralise {
+        pluralise( std::size_t count, std::string const& label );
+
+        friend std::ostream& operator << ( std::ostream& os, pluralise const& pluraliser );
+
+        std::size_t m_count;
+        std::string m_label;
+    };
+}
+
+// end catch_string_manip.h
+#ifndef CATCH_CONFIG_DISABLE_MATCHERS
+// start catch_capture_matchers.h
+
+// start catch_matchers.h
+
+#include <string>
+#include <vector>
+
+namespace Catch {
+namespace Matchers {
+    namespace Impl {
+
+        template<typename ArgT> struct MatchAllOf;
+        template<typename ArgT> struct MatchAnyOf;
+        template<typename ArgT> struct MatchNotOf;
+
+        class MatcherUntypedBase {
+        public:
+            MatcherUntypedBase() = default;
+            MatcherUntypedBase ( MatcherUntypedBase const& ) = default;
+            MatcherUntypedBase& operator = ( MatcherUntypedBase const& ) = delete;
+            std::string toString() const;
+
+        protected:
+            virtual ~MatcherUntypedBase();
+            virtual std::string describe() const = 0;
+            mutable std::string m_cachedToString;
+        };
+
+#ifdef __clang__
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wnon-virtual-dtor"
+#endif
+
+        template<typename ObjectT>
+        struct MatcherMethod {
+            virtual bool match( ObjectT const& arg ) const = 0;
+        };
+
+#ifdef __clang__
+#    pragma clang diagnostic pop
+#endif
+
+        template<typename T>
+        struct MatcherBase : MatcherUntypedBase, MatcherMethod<T> {
+
+            MatchAllOf<T> operator && ( MatcherBase const& other ) const;
+            MatchAnyOf<T> operator || ( MatcherBase const& other ) const;
+            MatchNotOf<T> operator ! () const;
+        };
+
+        template<typename ArgT>
+        struct MatchAllOf : MatcherBase<ArgT> {
+            bool match( ArgT const& arg ) const override {
+                for( auto matcher : m_matchers ) {
+                    if (!matcher->match(arg))
+                        return false;
+                }
+                return true;
+            }
+            std::string describe() const override {
+                std::string description;
+                description.reserve( 4 + m_matchers.size()*32 );
+                description += "( ";
+                bool first = true;
+                for( auto matcher : m_matchers ) {
+                    if( first )
+                        first = false;
+                    else
+                        description += " and ";
+                    description += matcher->toString();
+                }
+                description += " )";
+                return description;
+            }
+
+            MatchAllOf<ArgT>& operator && ( MatcherBase<ArgT> const& other ) {
+                m_matchers.push_back( &other );
+                return *this;
+            }
+
+            std::vector<MatcherBase<ArgT> const*> m_matchers;
+        };
+        template<typename ArgT>
+        struct MatchAnyOf : MatcherBase<ArgT> {
+
+            bool match( ArgT const& arg ) const override {
+                for( auto matcher : m_matchers ) {
+                    if (matcher->match(arg))
+                        return true;
+                }
+                return false;
+            }
+            std::string describe() const override {
+                std::string description;
+                description.reserve( 4 + m_matchers.size()*32 );
+                description += "( ";
+                bool first = true;
+                for( auto matcher : m_matchers ) {
+                    if( first )
+                        first = false;
+                    else
+                        description += " or ";
+                    description += matcher->toString();
+                }
+                description += " )";
+                return description;
+            }
+
+            MatchAnyOf<ArgT>& operator || ( MatcherBase<ArgT> const& other ) {
+                m_matchers.push_back( &other );
+                return *this;
+            }
+
+            std::vector<MatcherBase<ArgT> const*> m_matchers;
+        };
+
+        template<typename ArgT>
+        struct MatchNotOf : MatcherBase<ArgT> {
+
+            MatchNotOf( MatcherBase<ArgT> const& underlyingMatcher ) : m_underlyingMatcher( underlyingMatcher ) {}
+
+            bool match( ArgT const& arg ) const override {
+                return !m_underlyingMatcher.match( arg );
+            }
+
+            std::string describe() const override {
+                return "not " + m_underlyingMatcher.toString();
+            }
+            MatcherBase<ArgT> const& m_underlyingMatcher;
+        };
+
+        template<typename T>
+        MatchAllOf<T> MatcherBase<T>::operator && ( MatcherBase const& other ) const {
+            return MatchAllOf<T>() && *this && other;
+        }
+        template<typename T>
+        MatchAnyOf<T> MatcherBase<T>::operator || ( MatcherBase const& other ) const {
+            return MatchAnyOf<T>() || *this || other;
+        }
+        template<typename T>
+        MatchNotOf<T> MatcherBase<T>::operator ! () const {
+            return MatchNotOf<T>( *this );
+        }
+
+    } // namespace Impl
+
+} // namespace Matchers
+
+using namespace Matchers;
+using Matchers::Impl::MatcherBase;
+
+} // namespace Catch
+
+// end catch_matchers.h
+// start catch_matchers_floating.h
+
+#include <type_traits>
+#include <cmath>
+
+namespace Catch {
+namespace Matchers {
+
+    namespace Floating {
+
+        enum class FloatingPointKind : uint8_t;
+
+        struct WithinAbsMatcher : MatcherBase<double> {
+            WithinAbsMatcher(double target, double margin);
+            bool match(double const& matchee) const override;
+            std::string describe() const override;
+        private:
+            double m_target;
+            double m_margin;
+        };
+
+        struct WithinUlpsMatcher : MatcherBase<double> {
+            WithinUlpsMatcher(double target, int ulps, FloatingPointKind baseType);
+            bool match(double const& matchee) const override;
+            std::string describe() const override;
+        private:
+            double m_target;
+            int m_ulps;
+            FloatingPointKind m_type;
+        };
+
+    } // namespace Floating
+
+    // The following functions create the actual matcher objects.
+    // This allows the types to be inferred
+    Floating::WithinUlpsMatcher WithinULP(double target, int maxUlpDiff);
+    Floating::WithinUlpsMatcher WithinULP(float target, int maxUlpDiff);
+    Floating::WithinAbsMatcher WithinAbs(double target, double margin);
+
+} // namespace Matchers
+} // namespace Catch
+
+// end catch_matchers_floating.h
+// start catch_matchers_generic.hpp
+
+#include <functional>
+#include <string>
+
+namespace Catch {
+namespace Matchers {
+namespace Generic {
+
+namespace Detail {
+    std::string finalizeDescription(const std::string& desc);
+}
+
+template <typename T>
+class PredicateMatcher : public MatcherBase<T> {
+    std::function<bool(T const&)> m_predicate;
+    std::string m_description;
+public:
+
+    PredicateMatcher(std::function<bool(T const&)> const& elem, std::string const& descr)
+        :m_predicate(std::move(elem)),
+        m_description(Detail::finalizeDescription(descr))
+    {}
+
+    bool match( T const& item ) const override {
+        return m_predicate(item);
+    }
+
+    std::string describe() const override {
+        return m_description;
+    }
+};
+
+} // namespace Generic
+
+    // The following functions create the actual matcher objects.
+    // The user has to explicitly specify type to the function, because
+    // infering std::function<bool(T const&)> is hard (but possible) and
+    // requires a lot of TMP.
+    template<typename T>
+    Generic::PredicateMatcher<T> Predicate(std::function<bool(T const&)> const& predicate, std::string const& description = "") {
+        return Generic::PredicateMatcher<T>(predicate, description);
+    }
+
+} // namespace Matchers
+} // namespace Catch
+
+// end catch_matchers_generic.hpp
+// start catch_matchers_string.h
+
+#include <string>
+
+namespace Catch {
+namespace Matchers {
+
+    namespace StdString {
+
+        struct CasedString
+        {
+            CasedString( std::string const& str, CaseSensitive::Choice caseSensitivity );
+            std::string adjustString( std::string const& str ) const;
+            std::string caseSensitivitySuffix() const;
+
+            CaseSensitive::Choice m_caseSensitivity;
+            std::string m_str;
+        };
+
+        struct StringMatcherBase : MatcherBase<std::string> {
+            StringMatcherBase( std::string const& operation, CasedString const& comparator );
+            std::string describe() const override;
+
+            CasedString m_comparator;
+            std::string m_operation;
+        };
+
+        struct EqualsMatcher : StringMatcherBase {
+            EqualsMatcher( CasedString const& comparator );
+            bool match( std::string const& source ) const override;
+        };
+        struct ContainsMatcher : StringMatcherBase {
+            ContainsMatcher( CasedString const& comparator );
+            bool match( std::string const& source ) const override;
+        };
+        struct StartsWithMatcher : StringMatcherBase {
+            StartsWithMatcher( CasedString const& comparator );
+            bool match( std::string const& source ) const override;
+        };
+        struct EndsWithMatcher : StringMatcherBase {
+            EndsWithMatcher( CasedString const& comparator );
+            bool match( std::string const& source ) const override;
+        };
+
+        struct RegexMatcher : MatcherBase<std::string> {
+            RegexMatcher( std::string regex, CaseSensitive::Choice caseSensitivity );
+            bool match( std::string const& matchee ) const override;
+            std::string describe() const override;
+
+        private:
+            std::string m_regex;
+            CaseSensitive::Choice m_caseSensitivity;
+        };
+
+    } // namespace StdString
+
+    // The following functions create the actual matcher objects.
+    // This allows the types to be inferred
+
+    StdString::EqualsMatcher Equals( std::string const& str, CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes );
+    StdString::ContainsMatcher Contains( std::string const& str, CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes );
+    StdString::EndsWithMatcher EndsWith( std::string const& str, CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes );
+    StdString::StartsWithMatcher StartsWith( std::string const& str, CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes );
+    StdString::RegexMatcher Matches( std::string const& regex, CaseSensitive::Choice caseSensitivity = CaseSensitive::Yes );
+
+} // namespace Matchers
+} // namespace Catch
+
+// end catch_matchers_string.h
+// start catch_matchers_vector.h
+
+#include <algorithm>
+
+namespace Catch {
+namespace Matchers {
+
+    namespace Vector {
+        namespace Detail {
+            template <typename InputIterator, typename T>
+            size_t count(InputIterator first, InputIterator last, T const& item) {
+                size_t cnt = 0;
+                for (; first != last; ++first) {
+                    if (*first == item) {
+                        ++cnt;
+                    }
+                }
+                return cnt;
+            }
+            template <typename InputIterator, typename T>
+            bool contains(InputIterator first, InputIterator last, T const& item) {
+                for (; first != last; ++first) {
+                    if (*first == item) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+
+        template<typename T>
+        struct ContainsElementMatcher : MatcherBase<std::vector<T>> {
+
+            ContainsElementMatcher(T const &comparator) : m_comparator( comparator) {}
+
+            bool match(std::vector<T> const &v) const override {
+                for (auto const& el : v) {
+                    if (el == m_comparator) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+
+            std::string describe() const override {
+                return "Contains: " + ::Catch::Detail::stringify( m_comparator );
+            }
+
+            T const& m_comparator;
+        };
+
+        template<typename T>
+        struct ContainsMatcher : MatcherBase<std::vector<T>> {
+
+            ContainsMatcher(std::vector<T> const &comparator) : m_comparator( comparator ) {}
+
+            bool match(std::vector<T> const &v) const override {
+                // !TBD: see note in EqualsMatcher
+                if (m_comparator.size() > v.size())
+                    return false;
+                for (auto const& comparator : m_comparator) {
+                    auto present = false;
+                    for (const auto& el : v) {
+                        if (el == comparator) {
+                            present = true;
+                            break;
+                        }
+                    }
+                    if (!present) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            std::string describe() const override {
+                return "Contains: " + ::Catch::Detail::stringify( m_comparator );
+            }
+
+            std::vector<T> const& m_comparator;
+        };
+
+        template<typename T>
+        struct EqualsMatcher : MatcherBase<std::vector<T>> {
+
+            EqualsMatcher(std::vector<T> const &comparator) : m_comparator( comparator ) {}
+
+            bool match(std::vector<T> const &v) const override {
+                // !TBD: This currently works if all elements can be compared using !=
+                // - a more general approach would be via a compare template that defaults
+                // to using !=. but could be specialised for, e.g. std::vector<T> etc
+                // - then just call that directly
+                if (m_comparator.size() != v.size())
+                    return false;
+                for (std::size_t i = 0; i < v.size(); ++i)
+                    if (m_comparator[i] != v[i])
+                        return false;
+                return true;
+            }
+            std::string describe() const override {
+                return "Equals: " + ::Catch::Detail::stringify( m_comparator );
+            }
+            std::vector<T> const& m_comparator;
+        };
+
+        template<typename T>
+        struct UnorderedEqualsMatcher : MatcherBase<std::vector<T>> {
+            UnorderedEqualsMatcher(std::vector<T> const& target) : m_target(target) {}
+            bool match(std::vector<T> const& vec) const override {
+                // Note: This is a reimplementation of std::is_permutation,
+                //       because I don't want to include <algorithm> inside the common path
+                if (m_target.size() != vec.size()) {
+                    return false;
+                }
+                auto lfirst = m_target.begin(), llast = m_target.end();
+                auto rfirst = vec.begin(), rlast = vec.end();
+                // Cut common prefix to optimize checking of permuted parts
+                while (lfirst != llast && *lfirst == *rfirst) {
+                    ++lfirst; ++rfirst;
+                }
+                if (lfirst == llast) {
+                    return true;
+                }
+
+                for (auto mid = lfirst; mid != llast; ++mid) {
+                    // Skip already counted items
+                    if (Detail::contains(lfirst, mid, *mid)) {
+                        continue;
+                    }
+                    size_t num_vec = Detail::count(rfirst, rlast, *mid);
+                    if (num_vec == 0 || Detail::count(lfirst, llast, *mid) != num_vec) {
+                        return false;
+                    }
+                }
+
+                return true;
+            }
+
+            std::string describe() const override {
+                return "UnorderedEquals: " + ::Catch::Detail::stringify(m_target);
+            }
+        private:
+            std::vector<T> const& m_target;
+        };
+
+    } // namespace Vector
+
+    // The following functions create the actual matcher objects.
+    // This allows the types to be inferred
+
+    template<typename T>
+    Vector::ContainsMatcher<T> Contains( std::vector<T> const& comparator ) {
+        return Vector::ContainsMatcher<T>( comparator );
+    }
+
+    template<typename T>
+    Vector::ContainsElementMatcher<T> VectorContains( T const& comparator ) {
+        return Vector::ContainsElementMatcher<T>( comparator );
+    }
+
+    template<typename T>
+    Vector::EqualsMatcher<T> Equals( std::vector<T> const& comparator ) {
+        return Vector::EqualsMatcher<T>( comparator );
+    }
+
+    template<typename T>
+    Vector::UnorderedEqualsMatcher<T> UnorderedEquals(std::vector<T> const& target) {
+        return Vector::UnorderedEqualsMatcher<T>(target);
+    }
+
+} // namespace Matchers
+} // namespace Catch
+
+// end catch_matchers_vector.h
+namespace Catch {
+
+    template<typename ArgT, typename MatcherT>
+    class MatchExpr : public ITransientExpression {
+        ArgT const& m_arg;
+        MatcherT m_matcher;
+        StringRef m_matcherString;
+    public:
+        MatchExpr( ArgT const& arg, MatcherT const& matcher, StringRef const& matcherString )
+        :   ITransientExpression{ true, matcher.match( arg ) },
+            m_arg( arg ),
+            m_matcher( matcher ),
+            m_matcherString( matcherString )
+        {}
+
+        void streamReconstructedExpression( std::ostream &os ) const override {
+            auto matcherAsString = m_matcher.toString();
+            os << Catch::Detail::stringify( m_arg ) << ' ';
+            if( matcherAsString == Detail::unprintableString )
+                os << m_matcherString;
+            else
+                os << matcherAsString;
+        }
+    };
+
+    using StringMatcher = Matchers::Impl::MatcherBase<std::string>;
+
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef const& matcherString  );
+
+    template<typename ArgT, typename MatcherT>
+    auto makeMatchExpr( ArgT const& arg, MatcherT const& matcher, StringRef const& matcherString  ) -> MatchExpr<ArgT, MatcherT> {
+        return MatchExpr<ArgT, MatcherT>( arg, matcher, matcherString );
+    }
+
+} // namespace Catch
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CHECK_THAT( macroName, matcher, resultDisposition, arg ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(arg) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
+        INTERNAL_CATCH_TRY { \
+            catchAssertionHandler.handleExpr( Catch::makeMatchExpr( arg, matcher, #matcher##_catch_sr ) ); \
+        } INTERNAL_CATCH_CATCH( catchAssertionHandler ) \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+///////////////////////////////////////////////////////////////////////////////
+#define INTERNAL_CATCH_THROWS_MATCHES( macroName, exceptionType, resultDisposition, matcher, ... ) \
+    do { \
+        Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(__VA_ARGS__) ", " CATCH_INTERNAL_STRINGIFY(exceptionType) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
+        if( catchAssertionHandler.allowThrows() ) \
+            try { \
+                static_cast<void>(__VA_ARGS__ ); \
+                catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
+            } \
+            catch( exceptionType const& ex ) { \
+                catchAssertionHandler.handleExpr( Catch::makeMatchExpr( ex, matcher, #matcher##_catch_sr ) ); \
+            } \
+            catch( ... ) { \
+                catchAssertionHandler.handleUnexpectedInflightException(); \
+            } \
+        else \
+            catchAssertionHandler.handleThrowingCallSkipped(); \
+        INTERNAL_CATCH_REACT( catchAssertionHandler ) \
+    } while( false )
+
+// end catch_capture_matchers.h
+#endif
+// start catch_generators.hpp
+
+// start catch_interfaces_generatortracker.h
+
+
+#include <memory>
+
+namespace Catch {
+
+    namespace Generators {
+        class GeneratorBase {
+        protected:
+            size_t m_size = 0;
+
+        public:
+            GeneratorBase( size_t size ) : m_size( size ) {}
+            virtual ~GeneratorBase();
+            auto size() const -> size_t { return m_size; }
+        };
+        using GeneratorBasePtr = std::unique_ptr<GeneratorBase>;
+
+    } // namespace Generators
+
+    struct IGeneratorTracker {
+        virtual ~IGeneratorTracker();
+        virtual auto hasGenerator() const -> bool = 0;
+        virtual auto getGenerator() const -> Generators::GeneratorBasePtr const& = 0;
+        virtual void setGenerator( Generators::GeneratorBasePtr&& generator ) = 0;
+        virtual auto getIndex() const -> std::size_t = 0;
+    };
+
+} // namespace Catch
+
+// end catch_interfaces_generatortracker.h
+// start catch_enforce.h
+
+#include <stdexcept>
+
+namespace Catch {
+#if !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+    template <typename Ex>
+    [[noreturn]]
+    void throw_exception(Ex const& e) {
+        throw e;
+    }
+#else // ^^ Exceptions are enabled //  Exceptions are disabled vv
+    [[noreturn]]
+    void throw_exception(std::exception const& e);
+#endif
+} // namespace Catch;
+
+#define CATCH_PREPARE_EXCEPTION( type, msg ) \
+    type( ( Catch::ReusableStringStream() << msg ).str() )
+#define CATCH_INTERNAL_ERROR( msg ) \
+    Catch::throw_exception(CATCH_PREPARE_EXCEPTION( std::logic_error, CATCH_INTERNAL_LINEINFO << ": Internal Catch error: " << msg))
+#define CATCH_ERROR( msg ) \
+    Catch::throw_exception(CATCH_PREPARE_EXCEPTION( std::domain_error, msg ))
+#define CATCH_RUNTIME_ERROR( msg ) \
+    Catch::throw_exception(CATCH_PREPARE_EXCEPTION( std::runtime_error, msg ))
+#define CATCH_ENFORCE( condition, msg ) \
+    do{ if( !(condition) ) CATCH_ERROR( msg ); } while(false)
+
+// end catch_enforce.h
+#include <memory>
+#include <vector>
+#include <cassert>
+
+#include <utility>
+
+namespace Catch {
+namespace Generators {
+
+    // !TBD move this into its own location?
+    namespace pf{
+        template<typename T, typename... Args>
+        std::unique_ptr<T> make_unique( Args&&... args ) {
+            return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+        }
+    }
+
+    template<typename T>
+    struct IGenerator {
+        virtual ~IGenerator() {}
+        virtual auto get( size_t index ) const -> T = 0;
+    };
+
+    template<typename T>
+    class SingleValueGenerator : public IGenerator<T> {
+        T m_value;
+    public:
+        SingleValueGenerator( T const& value ) : m_value( value ) {}
+
+        auto get( size_t ) const -> T override {
+            return m_value;
+        }
+    };
+
+    template<typename T>
+    class FixedValuesGenerator : public IGenerator<T> {
+        std::vector<T> m_values;
+
+    public:
+        FixedValuesGenerator( std::initializer_list<T> values ) : m_values( values ) {}
+
+        auto get( size_t index ) const -> T override {
+            return m_values[index];
+        }
+    };
+
+    template<typename T>
+    class RangeGenerator : public IGenerator<T> {
+        T const m_first;
+        T const m_last;
+
+    public:
+        RangeGenerator( T const& first, T const& last ) : m_first( first ), m_last( last ) {
+            assert( m_last > m_first );
+        }
+
+        auto get( size_t index ) const -> T override {
+            // ToDo:: introduce a safe cast to catch potential overflows
+            return static_cast<T>(m_first+index);
+        }
+    };
+
+    template<typename T>
+    struct NullGenerator : IGenerator<T> {
+        auto get( size_t ) const -> T override {
+            CATCH_INTERNAL_ERROR("A Null Generator is always empty");
+        }
+    };
+
+    template<typename T>
+    class Generator {
+        std::unique_ptr<IGenerator<T>> m_generator;
+        size_t m_size;
+
+    public:
+        Generator( size_t size, std::unique_ptr<IGenerator<T>> generator )
+        :   m_generator( std::move( generator ) ),
+            m_size( size )
+        {}
+
+        auto size() const -> size_t { return m_size; }
+        auto operator[]( size_t index ) const -> T {
+            assert( index < m_size );
+            return m_generator->get( index );
+        }
+    };
+
+    std::vector<size_t> randomiseIndices( size_t selectionSize, size_t sourceSize );
+
+    template<typename T>
+    class GeneratorRandomiser : public IGenerator<T> {
+        Generator<T> m_baseGenerator;
+
+        std::vector<size_t> m_indices;
+    public:
+        GeneratorRandomiser( Generator<T>&& baseGenerator, size_t numberOfItems )
+        :   m_baseGenerator( std::move( baseGenerator ) ),
+            m_indices( randomiseIndices( numberOfItems, m_baseGenerator.size() ) )
+        {}
+
+        auto get( size_t index ) const -> T override {
+            return m_baseGenerator[m_indices[index]];
+        }
+    };
+
+    template<typename T>
+    struct RequiresASpecialisationFor;
+
+    template<typename T>
+    auto all() -> Generator<T> { return RequiresASpecialisationFor<T>(); }
+
+    template<>
+    auto all<int>() -> Generator<int>;
+
+    template<typename T>
+    auto range( T const& first, T const& last ) -> Generator<T> {
+        return Generator<T>( (last-first), pf::make_unique<RangeGenerator<T>>( first, last ) );
+    }
+
+    template<typename T>
+    auto random( T const& first, T const& last ) -> Generator<T> {
+        auto gen = range( first, last );
+        auto size = gen.size();
+
+        return Generator<T>( size, pf::make_unique<GeneratorRandomiser<T>>( std::move( gen ), size ) );
+    }
+    template<typename T>
+    auto random( size_t size ) -> Generator<T> {
+        return Generator<T>( size, pf::make_unique<GeneratorRandomiser<T>>( all<T>(), size ) );
+    }
+
+    template<typename T>
+    auto values( std::initializer_list<T> values ) -> Generator<T> {
+        return Generator<T>( values.size(), pf::make_unique<FixedValuesGenerator<T>>( values ) );
+    }
+    template<typename T>
+    auto value( T const& val ) -> Generator<T> {
+        return Generator<T>( 1, pf::make_unique<SingleValueGenerator<T>>( val ) );
+    }
+
+    template<typename T>
+    auto as() -> Generator<T> {
+        return Generator<T>( 0, pf::make_unique<NullGenerator<T>>() );
+    }
+
+    template<typename... Ts>
+    auto table( std::initializer_list<std::tuple<Ts...>>&& tuples ) -> Generator<std::tuple<Ts...>> {
+        return values<std::tuple<Ts...>>( std::forward<std::initializer_list<std::tuple<Ts...>>>( tuples ) );
+    }
+
+    template<typename T>
+    struct Generators : GeneratorBase {
+        std::vector<Generator<T>> m_generators;
+
+        using type = T;
+
+        Generators() : GeneratorBase( 0 ) {}
+
+        void populate( T&& val ) {
+            m_size += 1;
+            m_generators.emplace_back( value( std::move( val ) ) );
+        }
+        template<typename U>
+        void populate( U&& val ) {
+            populate( T( std::move( val ) ) );
+        }
+        void populate( Generator<T>&& generator ) {
+            m_size += generator.size();
+            m_generators.emplace_back( std::move( generator ) );
+        }
+
+        template<typename U, typename... Gs>
+        void populate( U&& valueOrGenerator, Gs... moreGenerators ) {
+            populate( std::forward<U>( valueOrGenerator ) );
+            populate( std::forward<Gs>( moreGenerators )... );
+        }
+
+        auto operator[]( size_t index ) const -> T {
+            size_t sizes = 0;
+            for( auto const& gen : m_generators ) {
+                auto localIndex = index-sizes;
+                sizes += gen.size();
+                if( index < sizes )
+                    return gen[localIndex];
+            }
+            CATCH_INTERNAL_ERROR("Index '" << index << "' is out of range (" << sizes << ')');
+        }
+    };
+
+    template<typename T, typename... Gs>
+    auto makeGenerators( Generator<T>&& generator, Gs... moreGenerators ) -> Generators<T> {
+        Generators<T> generators;
+        generators.m_generators.reserve( 1+sizeof...(Gs) );
+        generators.populate( std::move( generator ), std::forward<Gs>( moreGenerators )... );
+        return generators;
+    }
+    template<typename T>
+    auto makeGenerators( Generator<T>&& generator ) -> Generators<T> {
+        Generators<T> generators;
+        generators.populate( std::move( generator ) );
+        return generators;
+    }
+    template<typename T, typename... Gs>
+    auto makeGenerators( T&& val, Gs... moreGenerators ) -> Generators<T> {
+        return makeGenerators( value( std::forward<T>( val ) ), std::forward<Gs>( moreGenerators )... );
+    }
+    template<typename T, typename U, typename... Gs>
+    auto makeGenerators( U&& val, Gs... moreGenerators ) -> Generators<T> {
+        return makeGenerators( value( T( std::forward<U>( val ) ) ), std::forward<Gs>( moreGenerators )... );
+    }
+
+    auto acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker&;
+
+    template<typename L>
+    // Note: The type after -> is weird, because VS2015 cannot parse
+    //       the expression used in the typedef inside, when it is in
+    //       return type. Yeah, ¯\_(ツ)_/¯
+    auto generate( SourceLineInfo const& lineInfo, L const& generatorExpression ) -> decltype(std::declval<decltype(generatorExpression())>()[0]) {
+        using UnderlyingType = typename decltype(generatorExpression())::type;
+
+        IGeneratorTracker& tracker = acquireGeneratorTracker( lineInfo );
+        if( !tracker.hasGenerator() )
+            tracker.setGenerator( pf::make_unique<Generators<UnderlyingType>>( generatorExpression() ) );
+
+        auto const& generator = static_cast<Generators<UnderlyingType> const&>( *tracker.getGenerator() );
+        return generator[tracker.getIndex()];
+    }
+
+} // namespace Generators
+} // namespace Catch
+
+#define GENERATE( ... ) \
+    Catch::Generators::generate( CATCH_INTERNAL_LINEINFO, []{ using namespace Catch::Generators; return makeGenerators( __VA_ARGS__ ); } )
+
+// end catch_generators.hpp
+
+// These files are included here so the single_include script doesn't put them
+// in the conditionally compiled sections
+// start catch_test_case_info.h
+
+#include <string>
+#include <vector>
+#include <memory>
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+namespace Catch {
+
+    struct ITestInvoker;
+
+    struct TestCaseInfo {
+        enum SpecialProperties{
+            None = 0,
+            IsHidden = 1 << 1,
+            ShouldFail = 1 << 2,
+            MayFail = 1 << 3,
+            Throws = 1 << 4,
+            NonPortable = 1 << 5,
+            Benchmark = 1 << 6
+        };
+
+        TestCaseInfo(   std::string const& _name,
+                        std::string const& _className,
+                        std::string const& _description,
+                        std::vector<std::string> const& _tags,
+                        SourceLineInfo const& _lineInfo );
+
+        friend void setTags( TestCaseInfo& testCaseInfo, std::vector<std::string> tags );
+
+        bool isHidden() const;
+        bool throws() const;
+        bool okToFail() const;
+        bool expectedToFail() const;
+
+        std::string tagsAsString() const;
+
+        std::string name;
+        std::string className;
+        std::string description;
+        std::vector<std::string> tags;
+        std::vector<std::string> lcaseTags;
+        SourceLineInfo lineInfo;
+        SpecialProperties properties;
+    };
+
+    class TestCase : public TestCaseInfo {
+    public:
+
+        TestCase( ITestInvoker* testCase, TestCaseInfo&& info );
+
+        TestCase withName( std::string const& _newName ) const;
+
+        void invoke() const;
+
+        TestCaseInfo const& getTestCaseInfo() const;
+
+        bool operator == ( TestCase const& other ) const;
+        bool operator < ( TestCase const& other ) const;
+
+    private:
+        std::shared_ptr<ITestInvoker> test;
+    };
+
+    TestCase makeTestCase(  ITestInvoker* testCase,
+                            std::string const& className,
+                            NameAndTags const& nameAndTags,
+                            SourceLineInfo const& lineInfo );
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// end catch_test_case_info.h
+// start catch_interfaces_runner.h
+
+namespace Catch {
+
+    struct IRunner {
+        virtual ~IRunner();
+        virtual bool aborting() const = 0;
+    };
+}
+
+// end catch_interfaces_runner.h
+
+#ifdef __OBJC__
+// start catch_objc.hpp
+
+#import <objc/runtime.h>
+
+#include <string>
+
+// NB. Any general catch headers included here must be included
+// in catch.hpp first to make sure they are included by the single
+// header for non obj-usage
+
+///////////////////////////////////////////////////////////////////////////////
+// This protocol is really only here for (self) documenting purposes, since
+// all its methods are optional.
+@protocol OcFixture
+
+@optional
+
+-(void) setUp;
+-(void) tearDown;
+
+@end
+
+namespace Catch {
+
+    class OcMethod : public ITestInvoker {
+
+    public:
+        OcMethod( Class cls, SEL sel ) : m_cls( cls ), m_sel( sel ) {}
+
+        virtual void invoke() const {
+            id obj = [[m_cls alloc] init];
+
+            performOptionalSelector( obj, @selector(setUp)  );
+            performOptionalSelector( obj, m_sel );
+            performOptionalSelector( obj, @selector(tearDown)  );
+
+            arcSafeRelease( obj );
+        }
+    private:
+        virtual ~OcMethod() {}
+
+        Class m_cls;
+        SEL m_sel;
+    };
+
+    namespace Detail{
+
+        inline std::string getAnnotation(   Class cls,
+                                            std::string const& annotationName,
+                                            std::string const& testCaseName ) {
+            NSString* selStr = [[NSString alloc] initWithFormat:@"Catch_%s_%s", annotationName.c_str(), testCaseName.c_str()];
+            SEL sel = NSSelectorFromString( selStr );
+            arcSafeRelease( selStr );
+            id value = performOptionalSelector( cls, sel );
+            if( value )
+                return [(NSString*)value UTF8String];
+            return "";
+        }
+    }
+
+    inline std::size_t registerTestMethods() {
+        std::size_t noTestMethods = 0;
+        int noClasses = objc_getClassList( nullptr, 0 );
+
+        Class* classes = (CATCH_UNSAFE_UNRETAINED Class *)malloc( sizeof(Class) * noClasses);
+        objc_getClassList( classes, noClasses );
+
+        for( int c = 0; c < noClasses; c++ ) {
+            Class cls = classes[c];
+            {
+                u_int count;
+                Method* methods = class_copyMethodList( cls, &count );
+                for( u_int m = 0; m < count ; m++ ) {
+                    SEL selector = method_getName(methods[m]);
+                    std::string methodName = sel_getName(selector);
+                    if( startsWith( methodName, "Catch_TestCase_" ) ) {
+                        std::string testCaseName = methodName.substr( 15 );
+                        std::string name = Detail::getAnnotation( cls, "Name", testCaseName );
+                        std::string desc = Detail::getAnnotation( cls, "Description", testCaseName );
+                        const char* className = class_getName( cls );
+
+                        getMutableRegistryHub().registerTest( makeTestCase( new OcMethod( cls, selector ), className, NameAndTags( name.c_str(), desc.c_str() ), SourceLineInfo("",0) ) );
+                        noTestMethods++;
+                    }
+                }
+                free(methods);
+            }
+        }
+        return noTestMethods;
+    }
+
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+
+    namespace Matchers {
+        namespace Impl {
+        namespace NSStringMatchers {
+
+            struct StringHolder : MatcherBase<NSString*>{
+                StringHolder( NSString* substr ) : m_substr( [substr copy] ){}
+                StringHolder( StringHolder const& other ) : m_substr( [other.m_substr copy] ){}
+                StringHolder() {
+                    arcSafeRelease( m_substr );
+                }
+
+                bool match( NSString* arg ) const override {
+                    return false;
+                }
+
+                NSString* CATCH_ARC_STRONG m_substr;
+            };
+
+            struct Equals : StringHolder {
+                Equals( NSString* substr ) : StringHolder( substr ){}
+
+                bool match( NSString* str ) const override {
+                    return  (str != nil || m_substr == nil ) &&
+                            [str isEqualToString:m_substr];
+                }
+
+                std::string describe() const override {
+                    return "equals string: " + Catch::Detail::stringify( m_substr );
+                }
+            };
+
+            struct Contains : StringHolder {
+                Contains( NSString* substr ) : StringHolder( substr ){}
+
+                bool match( NSString* str ) const {
+                    return  (str != nil || m_substr == nil ) &&
+                            [str rangeOfString:m_substr].location != NSNotFound;
+                }
+
+                std::string describe() const override {
+                    return "contains string: " + Catch::Detail::stringify( m_substr );
+                }
+            };
+
+            struct StartsWith : StringHolder {
+                StartsWith( NSString* substr ) : StringHolder( substr ){}
+
+                bool match( NSString* str ) const override {
+                    return  (str != nil || m_substr == nil ) &&
+                            [str rangeOfString:m_substr].location == 0;
+                }
+
+                std::string describe() const override {
+                    return "starts with: " + Catch::Detail::stringify( m_substr );
+                }
+            };
+            struct EndsWith : StringHolder {
+                EndsWith( NSString* substr ) : StringHolder( substr ){}
+
+                bool match( NSString* str ) const override {
+                    return  (str != nil || m_substr == nil ) &&
+                            [str rangeOfString:m_substr].location == [str length] - [m_substr length];
+                }
+
+                std::string describe() const override {
+                    return "ends with: " + Catch::Detail::stringify( m_substr );
+                }
+            };
+
+        } // namespace NSStringMatchers
+        } // namespace Impl
+
+        inline Impl::NSStringMatchers::Equals
+            Equals( NSString* substr ){ return Impl::NSStringMatchers::Equals( substr ); }
+
+        inline Impl::NSStringMatchers::Contains
+            Contains( NSString* substr ){ return Impl::NSStringMatchers::Contains( substr ); }
+
+        inline Impl::NSStringMatchers::StartsWith
+            StartsWith( NSString* substr ){ return Impl::NSStringMatchers::StartsWith( substr ); }
+
+        inline Impl::NSStringMatchers::EndsWith
+            EndsWith( NSString* substr ){ return Impl::NSStringMatchers::EndsWith( substr ); }
+
+    } // namespace Matchers
+
+    using namespace Matchers;
+
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+
+} // namespace Catch
+
+///////////////////////////////////////////////////////////////////////////////
+#define OC_MAKE_UNIQUE_NAME( root, uniqueSuffix ) root##uniqueSuffix
+#define OC_TEST_CASE2( name, desc, uniqueSuffix ) \
++(NSString*) OC_MAKE_UNIQUE_NAME( Catch_Name_test_, uniqueSuffix ) \
+{ \
+return @ name; \
+} \
++(NSString*) OC_MAKE_UNIQUE_NAME( Catch_Description_test_, uniqueSuffix ) \
+{ \
+return @ desc; \
+} \
+-(void) OC_MAKE_UNIQUE_NAME( Catch_TestCase_test_, uniqueSuffix )
+
+#define OC_TEST_CASE( name, desc ) OC_TEST_CASE2( name, desc, __LINE__ )
+
+// end catch_objc.hpp
+#endif
+
+#ifdef CATCH_CONFIG_EXTERNAL_INTERFACES
+// start catch_external_interfaces.h
+
+// start catch_reporter_bases.hpp
+
+// start catch_interfaces_reporter.h
+
+// start catch_config.hpp
+
+// start catch_test_spec_parser.h
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+// start catch_test_spec.h
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+// start catch_wildcard_pattern.h
+
+namespace Catch
+{
+    class WildcardPattern {
+        enum WildcardPosition {
+            NoWildcard = 0,
+            WildcardAtStart = 1,
+            WildcardAtEnd = 2,
+            WildcardAtBothEnds = WildcardAtStart | WildcardAtEnd
+        };
+
+    public:
+
+        WildcardPattern( std::string const& pattern, CaseSensitive::Choice caseSensitivity );
+        virtual ~WildcardPattern() = default;
+        virtual bool matches( std::string const& str ) const;
+
+    private:
+        std::string adjustCase( std::string const& str ) const;
+        CaseSensitive::Choice m_caseSensitivity;
+        WildcardPosition m_wildcard = NoWildcard;
+        std::string m_pattern;
+    };
+}
+
+// end catch_wildcard_pattern.h
+#include <string>
+#include <vector>
+#include <memory>
+
+namespace Catch {
+
+    class TestSpec {
+        struct Pattern {
+            virtual ~Pattern();
+            virtual bool matches( TestCaseInfo const& testCase ) const = 0;
+        };
+        using PatternPtr = std::shared_ptr<Pattern>;
+
+        class NamePattern : public Pattern {
+        public:
+            NamePattern( std::string const& name );
+            virtual ~NamePattern();
+            virtual bool matches( TestCaseInfo const& testCase ) const override;
+        private:
+            WildcardPattern m_wildcardPattern;
+        };
+
+        class TagPattern : public Pattern {
+        public:
+            TagPattern( std::string const& tag );
+            virtual ~TagPattern();
+            virtual bool matches( TestCaseInfo const& testCase ) const override;
+        private:
+            std::string m_tag;
+        };
+
+        class ExcludedPattern : public Pattern {
+        public:
+            ExcludedPattern( PatternPtr const& underlyingPattern );
+            virtual ~ExcludedPattern();
+            virtual bool matches( TestCaseInfo const& testCase ) const override;
+        private:
+            PatternPtr m_underlyingPattern;
+        };
+
+        struct Filter {
+            std::vector<PatternPtr> m_patterns;
+
+            bool matches( TestCaseInfo const& testCase ) const;
+        };
+
+    public:
+        bool hasFilters() const;
+        bool matches( TestCaseInfo const& testCase ) const;
+
+    private:
+        std::vector<Filter> m_filters;
+
+        friend class TestSpecParser;
+    };
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// end catch_test_spec.h
+// start catch_interfaces_tag_alias_registry.h
+
+#include <string>
+
+namespace Catch {
+
+    struct TagAlias;
+
+    struct ITagAliasRegistry {
+        virtual ~ITagAliasRegistry();
+        // Nullptr if not present
+        virtual TagAlias const* find( std::string const& alias ) const = 0;
+        virtual std::string expandAliases( std::string const& unexpandedTestSpec ) const = 0;
+
+        static ITagAliasRegistry const& get();
+    };
+
+} // end namespace Catch
+
+// end catch_interfaces_tag_alias_registry.h
+namespace Catch {
+
+    class TestSpecParser {
+        enum Mode{ None, Name, QuotedName, Tag, EscapedName };
+        Mode m_mode = None;
+        bool m_exclusion = false;
+        std::size_t m_start = std::string::npos, m_pos = 0;
+        std::string m_arg;
+        std::vector<std::size_t> m_escapeChars;
+        TestSpec::Filter m_currentFilter;
+        TestSpec m_testSpec;
+        ITagAliasRegistry const* m_tagAliases = nullptr;
+
+    public:
+        TestSpecParser( ITagAliasRegistry const& tagAliases );
+
+        TestSpecParser& parse( std::string const& arg );
+        TestSpec testSpec();
+
+    private:
+        void visitChar( char c );
+        void startNewMode( Mode mode, std::size_t start );
+        void escape();
+        std::string subString() const;
+
+        template<typename T>
+        void addPattern() {
+            std::string token = subString();
+            for( std::size_t i = 0; i < m_escapeChars.size(); ++i )
+                token = token.substr( 0, m_escapeChars[i]-m_start-i ) + token.substr( m_escapeChars[i]-m_start-i+1 );
+            m_escapeChars.clear();
+            if( startsWith( token, "exclude:" ) ) {
+                m_exclusion = true;
+                token = token.substr( 8 );
+            }
+            if( !token.empty() ) {
+                TestSpec::PatternPtr pattern = std::make_shared<T>( token );
+                if( m_exclusion )
+                    pattern = std::make_shared<TestSpec::ExcludedPattern>( pattern );
+                m_currentFilter.m_patterns.push_back( pattern );
+            }
+            m_exclusion = false;
+            m_mode = None;
+        }
+
+        void addFilter();
+    };
+    TestSpec parseTestSpec( std::string const& arg );
+
+} // namespace Catch
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// end catch_test_spec_parser.h
+// start catch_interfaces_config.h
+
+#include <iosfwd>
+#include <string>
+#include <vector>
+#include <memory>
+
+namespace Catch {
+
+    enum class Verbosity {
+        Quiet = 0,
+        Normal,
+        High
+    };
+
+    struct WarnAbout { enum What {
+        Nothing = 0x00,
+        NoAssertions = 0x01,
+        NoTests = 0x02
+    }; };
+
+    struct ShowDurations { enum OrNot {
+        DefaultForReporter,
+        Always,
+        Never
+    }; };
+    struct RunTests { enum InWhatOrder {
+        InDeclarationOrder,
+        InLexicographicalOrder,
+        InRandomOrder
+    }; };
+    struct UseColour { enum YesOrNo {
+        Auto,
+        Yes,
+        No
+    }; };
+    struct WaitForKeypress { enum When {
+        Never,
+        BeforeStart = 1,
+        BeforeExit = 2,
+        BeforeStartAndExit = BeforeStart | BeforeExit
+    }; };
+
+    class TestSpec;
+
+    struct IConfig : NonCopyable {
+
+        virtual ~IConfig();
+
+        virtual bool allowThrows() const = 0;
+        virtual std::ostream& stream() const = 0;
+        virtual std::string name() const = 0;
+        virtual bool includeSuccessfulResults() const = 0;
+        virtual bool shouldDebugBreak() const = 0;
+        virtual bool warnAboutMissingAssertions() const = 0;
+        virtual bool warnAboutNoTests() const = 0;
+        virtual int abortAfter() const = 0;
+        virtual bool showInvisibles() const = 0;
+        virtual ShowDurations::OrNot showDurations() const = 0;
+        virtual TestSpec const& testSpec() const = 0;
+        virtual bool hasTestFilters() const = 0;
+        virtual RunTests::InWhatOrder runOrder() const = 0;
+        virtual unsigned int rngSeed() const = 0;
+        virtual int benchmarkResolutionMultiple() const = 0;
+        virtual UseColour::YesOrNo useColour() const = 0;
+        virtual std::vector<std::string> const& getSectionsToRun() const = 0;
+        virtual Verbosity verbosity() const = 0;
+    };
+
+    using IConfigPtr = std::shared_ptr<IConfig const>;
+}
+
+// end catch_interfaces_config.h
+// Libstdc++ doesn't like incomplete classes for unique_ptr
+
+#include <memory>
+#include <vector>
+#include <string>
+
+#ifndef CATCH_CONFIG_CONSOLE_WIDTH
+#define CATCH_CONFIG_CONSOLE_WIDTH 80
+#endif
+
+namespace Catch {
+
+    struct IStream;
+
+    struct ConfigData {
+        bool listTests = false;
+        bool listTags = false;
+        bool listReporters = false;
+        bool listTestNamesOnly = false;
+
+        bool showSuccessfulTests = false;
+        bool shouldDebugBreak = false;
+        bool noThrow = false;
+        bool showHelp = false;
+        bool showInvisibles = false;
+        bool filenamesAsTags = false;
+        bool libIdentify = false;
+
+        int abortAfter = -1;
+        unsigned int rngSeed = 0;
+        int benchmarkResolutionMultiple = 100;
+
+        Verbosity verbosity = Verbosity::Normal;
+        WarnAbout::What warnings = WarnAbout::Nothing;
+        ShowDurations::OrNot showDurations = ShowDurations::DefaultForReporter;
+        RunTests::InWhatOrder runOrder = RunTests::InDeclarationOrder;
+        UseColour::YesOrNo useColour = UseColour::Auto;
+        WaitForKeypress::When waitForKeypress = WaitForKeypress::Never;
+
+        std::string outputFilename;
+        std::string name;
+        std::string processName;
+#ifndef CATCH_CONFIG_DEFAULT_REPORTER
+#define CATCH_CONFIG_DEFAULT_REPORTER "console"
+#endif
+        std::string reporterName = CATCH_CONFIG_DEFAULT_REPORTER;
+#undef CATCH_CONFIG_DEFAULT_REPORTER
+
+        std::vector<std::string> testsOrTags;
+        std::vector<std::string> sectionsToRun;
+    };
+
+    class Config : public IConfig {
+    public:
+
+        Config() = default;
+        Config( ConfigData const& data );
+        virtual ~Config() = default;
+
+        std::string const& getFilename() const;
+
+        bool listTests() const;
+        bool listTestNamesOnly() const;
+        bool listTags() const;
+        bool listReporters() const;
+
+        std::string getProcessName() const;
+        std::string const& getReporterName() const;
+
+        std::vector<std::string> const& getTestsOrTags() const;
+        std::vector<std::string> const& getSectionsToRun() const override;
+
+        virtual TestSpec const& testSpec() const override;
+        bool hasTestFilters() const override;
+
+        bool showHelp() const;
+
+        // IConfig interface
+        bool allowThrows() const override;
+        std::ostream& stream() const override;
+        std::string name() const override;
+        bool includeSuccessfulResults() const override;
+        bool warnAboutMissingAssertions() const override;
+        bool warnAboutNoTests() const override;
+        ShowDurations::OrNot showDurations() const override;
+        RunTests::InWhatOrder runOrder() const override;
+        unsigned int rngSeed() const override;
+        int benchmarkResolutionMultiple() const override;
+        UseColour::YesOrNo useColour() const override;
+        bool shouldDebugBreak() const override;
+        int abortAfter() const override;
+        bool showInvisibles() const override;
+        Verbosity verbosity() const override;
+
+    private:
+
+        IStream const* openStream();
+        ConfigData m_data;
+
+        std::unique_ptr<IStream const> m_stream;
+        TestSpec m_testSpec;
+        bool m_hasTestFilters = false;
+    };
+
+} // end namespace Catch
+
+// end catch_config.hpp
+// start catch_assertionresult.h
+
+#include <string>
+
+namespace Catch {
+
+    struct AssertionResultData
+    {
+        AssertionResultData() = delete;
+
+        AssertionResultData( ResultWas::OfType _resultType, LazyExpression const& _lazyExpression );
+
+        std::string message;
+        mutable std::string reconstructedExpression;
+        LazyExpression lazyExpression;
+        ResultWas::OfType resultType;
+
+        std::string reconstructExpression() const;
+    };
+
+    class AssertionResult {
+    public:
+        AssertionResult() = delete;
+        AssertionResult( AssertionInfo const& info, AssertionResultData const& data );
+
+        bool isOk() const;
+        bool succeeded() const;
+        ResultWas::OfType getResultType() const;
+        bool hasExpression() const;
+        bool hasMessage() const;
+        std::string getExpression() const;
+        std::string getExpressionInMacro() const;
+        bool hasExpandedExpression() const;
+        std::string getExpandedExpression() const;
+        std::string getMessage() const;
+        SourceLineInfo getSourceInfo() const;
+        StringRef getTestMacroName() const;
+
+    //protected:
+        AssertionInfo m_info;
+        AssertionResultData m_resultData;
+    };
+
+} // end namespace Catch
+
+// end catch_assertionresult.h
+// start catch_option.hpp
+
+namespace Catch {
+
+    // An optional type
+    template<typename T>
+    class Option {
+    public:
+        Option() : nullableValue( nullptr ) {}
+        Option( T const& _value )
+        : nullableValue( new( storage ) T( _value ) )
+        {}
+        Option( Option const& _other )
+        : nullableValue( _other ? new( storage ) T( *_other ) : nullptr )
+        {}
+
+        ~Option() {
+            reset();
+        }
+
+        Option& operator= ( Option const& _other ) {
+            if( &_other != this ) {
+                reset();
+                if( _other )
+                    nullableValue = new( storage ) T( *_other );
+            }
+            return *this;
+        }
+        Option& operator = ( T const& _value ) {
+            reset();
+            nullableValue = new( storage ) T( _value );
+            return *this;
+        }
+
+        void reset() {
+            if( nullableValue )
+                nullableValue->~T();
+            nullableValue = nullptr;
+        }
+
+        T& operator*() { return *nullableValue; }
+        T const& operator*() const { return *nullableValue; }
+        T* operator->() { return nullableValue; }
+        const T* operator->() const { return nullableValue; }
+
+        T valueOr( T const& defaultValue ) const {
+            return nullableValue ? *nullableValue : defaultValue;
+        }
+
+        bool some() const { return nullableValue != nullptr; }
+        bool none() const { return nullableValue == nullptr; }
+
+        bool operator !() const { return nullableValue == nullptr; }
+        explicit operator bool() const {
+            return some();
+        }
+
+    private:
+        T *nullableValue;
+        alignas(alignof(T)) char storage[sizeof(T)];
+    };
+
+} // end namespace Catch
+
+// end catch_option.hpp
+#include <string>
+#include <iosfwd>
+#include <map>
+#include <set>
+#include <memory>
+
+namespace Catch {
+
+    struct ReporterConfig {
+        explicit ReporterConfig( IConfigPtr const& _fullConfig );
+
+        ReporterConfig( IConfigPtr const& _fullConfig, std::ostream& _stream );
+
+        std::ostream& stream() const;
+        IConfigPtr fullConfig() const;
+
+    private:
+        std::ostream* m_stream;
+        IConfigPtr m_fullConfig;
+    };
+
+    struct ReporterPreferences {
+        bool shouldRedirectStdOut = false;
+        bool shouldReportAllAssertions = false;
+    };
+
+    template<typename T>
+    struct LazyStat : Option<T> {
+        LazyStat& operator=( T const& _value ) {
+            Option<T>::operator=( _value );
+            used = false;
+            return *this;
+        }
+        void reset() {
+            Option<T>::reset();
+            used = false;
+        }
+        bool used = false;
+    };
+
+    struct TestRunInfo {
+        TestRunInfo( std::string const& _name );
+        std::string name;
+    };
+    struct GroupInfo {
+        GroupInfo(  std::string const& _name,
+                    std::size_t _groupIndex,
+                    std::size_t _groupsCount );
+
+        std::string name;
+        std::size_t groupIndex;
+        std::size_t groupsCounts;
+    };
+
+    struct AssertionStats {
+        AssertionStats( AssertionResult const& _assertionResult,
+                        std::vector<MessageInfo> const& _infoMessages,
+                        Totals const& _totals );
+
+        AssertionStats( AssertionStats const& )              = default;
+        AssertionStats( AssertionStats && )                  = default;
+        AssertionStats& operator = ( AssertionStats const& ) = default;
+        AssertionStats& operator = ( AssertionStats && )     = default;
+        virtual ~AssertionStats();
+
+        AssertionResult assertionResult;
+        std::vector<MessageInfo> infoMessages;
+        Totals totals;
+    };
+
+    struct SectionStats {
+        SectionStats(   SectionInfo const& _sectionInfo,
+                        Counts const& _assertions,
+                        double _durationInSeconds,
+                        bool _missingAssertions );
+        SectionStats( SectionStats const& )              = default;
+        SectionStats( SectionStats && )                  = default;
+        SectionStats& operator = ( SectionStats const& ) = default;
+        SectionStats& operator = ( SectionStats && )     = default;
+        virtual ~SectionStats();
+
+        SectionInfo sectionInfo;
+        Counts assertions;
+        double durationInSeconds;
+        bool missingAssertions;
+    };
+
+    struct TestCaseStats {
+        TestCaseStats(  TestCaseInfo const& _testInfo,
+                        Totals const& _totals,
+                        std::string const& _stdOut,
+                        std::string const& _stdErr,
+                        bool _aborting );
+
+        TestCaseStats( TestCaseStats const& )              = default;
+        TestCaseStats( TestCaseStats && )                  = default;
+        TestCaseStats& operator = ( TestCaseStats const& ) = default;
+        TestCaseStats& operator = ( TestCaseStats && )     = default;
+        virtual ~TestCaseStats();
+
+        TestCaseInfo testInfo;
+        Totals totals;
+        std::string stdOut;
+        std::string stdErr;
+        bool aborting;
+    };
+
+    struct TestGroupStats {
+        TestGroupStats( GroupInfo const& _groupInfo,
+                        Totals const& _totals,
+                        bool _aborting );
+        TestGroupStats( GroupInfo const& _groupInfo );
+
+        TestGroupStats( TestGroupStats const& )              = default;
+        TestGroupStats( TestGroupStats && )                  = default;
+        TestGroupStats& operator = ( TestGroupStats const& ) = default;
+        TestGroupStats& operator = ( TestGroupStats && )     = default;
+        virtual ~TestGroupStats();
+
+        GroupInfo groupInfo;
+        Totals totals;
+        bool aborting;
+    };
+
+    struct TestRunStats {
+        TestRunStats(   TestRunInfo const& _runInfo,
+                        Totals const& _totals,
+                        bool _aborting );
+
+        TestRunStats( TestRunStats const& )              = default;
+        TestRunStats( TestRunStats && )                  = default;
+        TestRunStats& operator = ( TestRunStats const& ) = default;
+        TestRunStats& operator = ( TestRunStats && )     = default;
+        virtual ~TestRunStats();
+
+        TestRunInfo runInfo;
+        Totals totals;
+        bool aborting;
+    };
+
+    struct BenchmarkInfo {
+        std::string name;
+    };
+    struct BenchmarkStats {
+        BenchmarkInfo info;
+        std::size_t iterations;
+        uint64_t elapsedTimeInNanoseconds;
+    };
+
+    struct IStreamingReporter {
+        virtual ~IStreamingReporter() = default;
+
+        // Implementing class must also provide the following static methods:
+        // static std::string getDescription();
+        // static std::set<Verbosity> getSupportedVerbosities()
+
+        virtual ReporterPreferences getPreferences() const = 0;
+
+        virtual void noMatchingTestCases( std::string const& spec ) = 0;
+
+        virtual void testRunStarting( TestRunInfo const& testRunInfo ) = 0;
+        virtual void testGroupStarting( GroupInfo const& groupInfo ) = 0;
+
+        virtual void testCaseStarting( TestCaseInfo const& testInfo ) = 0;
+        virtual void sectionStarting( SectionInfo const& sectionInfo ) = 0;
+
+        // *** experimental ***
+        virtual void benchmarkStarting( BenchmarkInfo const& ) {}
+
+        virtual void assertionStarting( AssertionInfo const& assertionInfo ) = 0;
+
+        // The return value indicates if the messages buffer should be cleared:
+        virtual bool assertionEnded( AssertionStats const& assertionStats ) = 0;
+
+        // *** experimental ***
+        virtual void benchmarkEnded( BenchmarkStats const& ) {}
+
+        virtual void sectionEnded( SectionStats const& sectionStats ) = 0;
+        virtual void testCaseEnded( TestCaseStats const& testCaseStats ) = 0;
+        virtual void testGroupEnded( TestGroupStats const& testGroupStats ) = 0;
+        virtual void testRunEnded( TestRunStats const& testRunStats ) = 0;
+
+        virtual void skipTest( TestCaseInfo const& testInfo ) = 0;
+
+        // Default empty implementation provided
+        virtual void fatalErrorEncountered( StringRef name );
+
+        virtual bool isMulti() const;
+    };
+    using IStreamingReporterPtr = std::unique_ptr<IStreamingReporter>;
+
+    struct IReporterFactory {
+        virtual ~IReporterFactory();
+        virtual IStreamingReporterPtr create( ReporterConfig const& config ) const = 0;
+        virtual std::string getDescription() const = 0;
+    };
+    using IReporterFactoryPtr = std::shared_ptr<IReporterFactory>;
+
+    struct IReporterRegistry {
+        using FactoryMap = std::map<std::string, IReporterFactoryPtr>;
+        using Listeners = std::vector<IReporterFactoryPtr>;
+
+        virtual ~IReporterRegistry();
+        virtual IStreamingReporterPtr create( std::string const& name, IConfigPtr const& config ) const = 0;
+        virtual FactoryMap const& getFactories() const = 0;
+        virtual Listeners const& getListeners() const = 0;
+    };
+
+} // end namespace Catch
+
+// end catch_interfaces_reporter.h
+#include <algorithm>
+#include <cstring>
+#include <cfloat>
+#include <cstdio>
+#include <cassert>
+#include <memory>
+#include <ostream>
+
+namespace Catch {
+    void prepareExpandedExpression(AssertionResult& result);
+
+    // Returns double formatted as %.3f (format expected on output)
+    std::string getFormattedDuration( double duration );
+
+    template<typename DerivedT>
+    struct StreamingReporterBase : IStreamingReporter {
+
+        StreamingReporterBase( ReporterConfig const& _config )
+        :   m_config( _config.fullConfig() ),
+            stream( _config.stream() )
+        {
+            m_reporterPrefs.shouldRedirectStdOut = false;
+            if( !DerivedT::getSupportedVerbosities().count( m_config->verbosity() ) )
+                CATCH_ERROR( "Verbosity level not supported by this reporter" );
+        }
+
+        ReporterPreferences getPreferences() const override {
+            return m_reporterPrefs;
+        }
+
+        static std::set<Verbosity> getSupportedVerbosities() {
+            return { Verbosity::Normal };
+        }
+
+        ~StreamingReporterBase() override = default;
+
+        void noMatchingTestCases(std::string const&) override {}
+
+        void testRunStarting(TestRunInfo const& _testRunInfo) override {
+            currentTestRunInfo = _testRunInfo;
+        }
+        void testGroupStarting(GroupInfo const& _groupInfo) override {
+            currentGroupInfo = _groupInfo;
+        }
+
+        void testCaseStarting(TestCaseInfo const& _testInfo) override  {
+            currentTestCaseInfo = _testInfo;
+        }
+        void sectionStarting(SectionInfo const& _sectionInfo) override {
+            m_sectionStack.push_back(_sectionInfo);
+        }
+
+        void sectionEnded(SectionStats const& /* _sectionStats */) override {
+            m_sectionStack.pop_back();
+        }
+        void testCaseEnded(TestCaseStats const& /* _testCaseStats */) override {
+            currentTestCaseInfo.reset();
+        }
+        void testGroupEnded(TestGroupStats const& /* _testGroupStats */) override {
+            currentGroupInfo.reset();
+        }
+        void testRunEnded(TestRunStats const& /* _testRunStats */) override {
+            currentTestCaseInfo.reset();
+            currentGroupInfo.reset();
+            currentTestRunInfo.reset();
+        }
+
+        void skipTest(TestCaseInfo const&) override {
+            // Don't do anything with this by default.
+            // It can optionally be overridden in the derived class.
+        }
+
+        IConfigPtr m_config;
+        std::ostream& stream;
+
+        LazyStat<TestRunInfo> currentTestRunInfo;
+        LazyStat<GroupInfo> currentGroupInfo;
+        LazyStat<TestCaseInfo> currentTestCaseInfo;
+
+        std::vector<SectionInfo> m_sectionStack;
+        ReporterPreferences m_reporterPrefs;
+    };
+
+    template<typename DerivedT>
+    struct CumulativeReporterBase : IStreamingReporter {
+        template<typename T, typename ChildNodeT>
+        struct Node {
+            explicit Node( T const& _value ) : value( _value ) {}
+            virtual ~Node() {}
+
+            using ChildNodes = std::vector<std::shared_ptr<ChildNodeT>>;
+            T value;
+            ChildNodes children;
+        };
+        struct SectionNode {
+            explicit SectionNode(SectionStats const& _stats) : stats(_stats) {}
+            virtual ~SectionNode() = default;
+
+            bool operator == (SectionNode const& other) const {
+                return stats.sectionInfo.lineInfo == other.stats.sectionInfo.lineInfo;
+            }
+            bool operator == (std::shared_ptr<SectionNode> const& other) const {
+                return operator==(*other);
+            }
+
+            SectionStats stats;
+            using ChildSections = std::vector<std::shared_ptr<SectionNode>>;
+            using Assertions = std::vector<AssertionStats>;
+            ChildSections childSections;
+            Assertions assertions;
+            std::string stdOut;
+            std::string stdErr;
+        };
+
+        struct BySectionInfo {
+            BySectionInfo( SectionInfo const& other ) : m_other( other ) {}
+            BySectionInfo( BySectionInfo const& other ) : m_other( other.m_other ) {}
+            bool operator() (std::shared_ptr<SectionNode> const& node) const {
+                return ((node->stats.sectionInfo.name == m_other.name) &&
+                        (node->stats.sectionInfo.lineInfo == m_other.lineInfo));
+            }
+            void operator=(BySectionInfo const&) = delete;
+
+        private:
+            SectionInfo const& m_other;
+        };
+
+        using TestCaseNode = Node<TestCaseStats, SectionNode>;
+        using TestGroupNode = Node<TestGroupStats, TestCaseNode>;
+        using TestRunNode = Node<TestRunStats, TestGroupNode>;
+
+        CumulativeReporterBase( ReporterConfig const& _config )
+        :   m_config( _config.fullConfig() ),
+            stream( _config.stream() )
+        {
+            m_reporterPrefs.shouldRedirectStdOut = false;
+            if( !DerivedT::getSupportedVerbosities().count( m_config->verbosity() ) )
+                CATCH_ERROR( "Verbosity level not supported by this reporter" );
+        }
+        ~CumulativeReporterBase() override = default;
+
+        ReporterPreferences getPreferences() const override {
+            return m_reporterPrefs;
+        }
+
+        static std::set<Verbosity> getSupportedVerbosities() {
+            return { Verbosity::Normal };
+        }
+
+        void testRunStarting( TestRunInfo const& ) override {}
+        void testGroupStarting( GroupInfo const& ) override {}
+
+        void testCaseStarting( TestCaseInfo const& ) override {}
+
+        void sectionStarting( SectionInfo const& sectionInfo ) override {
+            SectionStats incompleteStats( sectionInfo, Counts(), 0, false );
+            std::shared_ptr<SectionNode> node;
+            if( m_sectionStack.empty() ) {
+                if( !m_rootSection )
+                    m_rootSection = std::make_shared<SectionNode>( incompleteStats );
+                node = m_rootSection;
+            }
+            else {
+                SectionNode& parentNode = *m_sectionStack.back();
+                auto it =
+                    std::find_if(   parentNode.childSections.begin(),
+                                    parentNode.childSections.end(),
+                                    BySectionInfo( sectionInfo ) );
+                if( it == parentNode.childSections.end() ) {
+                    node = std::make_shared<SectionNode>( incompleteStats );
+                    parentNode.childSections.push_back( node );
+                }
+                else
+                    node = *it;
+            }
+            m_sectionStack.push_back( node );
+            m_deepestSection = std::move(node);
+        }
+
+        void assertionStarting(AssertionInfo const&) override {}
+
+        bool assertionEnded(AssertionStats const& assertionStats) override {
+            assert(!m_sectionStack.empty());
+            // AssertionResult holds a pointer to a temporary DecomposedExpression,
+            // which getExpandedExpression() calls to build the expression string.
+            // Our section stack copy of the assertionResult will likely outlive the
+            // temporary, so it must be expanded or discarded now to avoid calling
+            // a destroyed object later.
+            prepareExpandedExpression(const_cast<AssertionResult&>( assertionStats.assertionResult ) );
+            SectionNode& sectionNode = *m_sectionStack.back();
+            sectionNode.assertions.push_back(assertionStats);
+            return true;
+        }
+        void sectionEnded(SectionStats const& sectionStats) override {
+            assert(!m_sectionStack.empty());
+            SectionNode& node = *m_sectionStack.back();
+            node.stats = sectionStats;
+            m_sectionStack.pop_back();
+        }
+        void testCaseEnded(TestCaseStats const& testCaseStats) override {
+            auto node = std::make_shared<TestCaseNode>(testCaseStats);
+            assert(m_sectionStack.size() == 0);
+            node->children.push_back(m_rootSection);
+            m_testCases.push_back(node);
+            m_rootSection.reset();
+
+            assert(m_deepestSection);
+            m_deepestSection->stdOut = testCaseStats.stdOut;
+            m_deepestSection->stdErr = testCaseStats.stdErr;
+        }
+        void testGroupEnded(TestGroupStats const& testGroupStats) override {
+            auto node = std::make_shared<TestGroupNode>(testGroupStats);
+            node->children.swap(m_testCases);
+            m_testGroups.push_back(node);
+        }
+        void testRunEnded(TestRunStats const& testRunStats) override {
+            auto node = std::make_shared<TestRunNode>(testRunStats);
+            node->children.swap(m_testGroups);
+            m_testRuns.push_back(node);
+            testRunEndedCumulative();
+        }
+        virtual void testRunEndedCumulative() = 0;
+
+        void skipTest(TestCaseInfo const&) override {}
+
+        IConfigPtr m_config;
+        std::ostream& stream;
+        std::vector<AssertionStats> m_assertions;
+        std::vector<std::vector<std::shared_ptr<SectionNode>>> m_sections;
+        std::vector<std::shared_ptr<TestCaseNode>> m_testCases;
+        std::vector<std::shared_ptr<TestGroupNode>> m_testGroups;
+
+        std::vector<std::shared_ptr<TestRunNode>> m_testRuns;
+
+        std::shared_ptr<SectionNode> m_rootSection;
+        std::shared_ptr<SectionNode> m_deepestSection;
+        std::vector<std::shared_ptr<SectionNode>> m_sectionStack;
+        ReporterPreferences m_reporterPrefs;
+    };
+
+    template<char C>
+    char const* getLineOfChars() {
+        static char line[CATCH_CONFIG_CONSOLE_WIDTH] = {0};
+        if( !*line ) {
+            std::memset( line, C, CATCH_CONFIG_CONSOLE_WIDTH-1 );
+            line[CATCH_CONFIG_CONSOLE_WIDTH-1] = 0;
+        }
+        return line;
+    }
+
+    struct TestEventListenerBase : StreamingReporterBase<TestEventListenerBase> {
+        TestEventListenerBase( ReporterConfig const& _config );
+
+        static std::set<Verbosity> getSupportedVerbosities();
+
+        void assertionStarting(AssertionInfo const&) override;
+        bool assertionEnded(AssertionStats const&) override;
+    };
+
+} // end namespace Catch
+
+// end catch_reporter_bases.hpp
+// start catch_console_colour.h
+
+namespace Catch {
+
+    struct Colour {
+        enum Code {
+            None = 0,
+
+            White,
+            Red,
+            Green,
+            Blue,
+            Cyan,
+            Yellow,
+            Grey,
+
+            Bright = 0x10,
+
+            BrightRed = Bright | Red,
+            BrightGreen = Bright | Green,
+            LightGrey = Bright | Grey,
+            BrightWhite = Bright | White,
+            BrightYellow = Bright | Yellow,
+
+            // By intention
+            FileName = LightGrey,
+            Warning = BrightYellow,
+            ResultError = BrightRed,
+            ResultSuccess = BrightGreen,
+            ResultExpectedFailure = Warning,
+
+            Error = BrightRed,
+            Success = Green,
+
+            OriginalExpression = Cyan,
+            ReconstructedExpression = BrightYellow,
+
+            SecondaryText = LightGrey,
+            Headers = White
+        };
+
+        // Use constructed object for RAII guard
+        Colour( Code _colourCode );
+        Colour( Colour&& other ) noexcept;
+        Colour& operator=( Colour&& other ) noexcept;
+        ~Colour();
+
+        // Use static method for one-shot changes
+        static void use( Code _colourCode );
+
+    private:
+        bool m_moved = false;
+    };
+
+    std::ostream& operator << ( std::ostream& os, Colour const& );
+
+} // end namespace Catch
+
+// end catch_console_colour.h
+// start catch_reporter_registrars.hpp
+
+
+namespace Catch {
+
+    template<typename T>
+    class ReporterRegistrar {
+
+        class ReporterFactory : public IReporterFactory {
+
+            virtual IStreamingReporterPtr create( ReporterConfig const& config ) const override {
+                return std::unique_ptr<T>( new T( config ) );
+            }
+
+            virtual std::string getDescription() const override {
+                return T::getDescription();
+            }
+        };
+
+    public:
+
+        explicit ReporterRegistrar( std::string const& name ) {
+            getMutableRegistryHub().registerReporter( name, std::make_shared<ReporterFactory>() );
+        }
+    };
+
+    template<typename T>
+    class ListenerRegistrar {
+
+        class ListenerFactory : public IReporterFactory {
+
+            virtual IStreamingReporterPtr create( ReporterConfig const& config ) const override {
+                return std::unique_ptr<T>( new T( config ) );
+            }
+            virtual std::string getDescription() const override {
+                return std::string();
+            }
+        };
+
+    public:
+
+        ListenerRegistrar() {
+            getMutableRegistryHub().registerListener( std::make_shared<ListenerFactory>() );
+        }
+    };
+}
+
+#if !defined(CATCH_CONFIG_DISABLE)
+
+#define CATCH_REGISTER_REPORTER( name, reporterType ) \
+    CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS          \
+    namespace{ Catch::ReporterRegistrar<reporterType> catch_internal_RegistrarFor##reporterType( name ); } \
+    CATCH_INTERNAL_UNSUPPRESS_GLOBALS_WARNINGS
+
+#define CATCH_REGISTER_LISTENER( listenerType ) \
+     CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS   \
+     namespace{ Catch::ListenerRegistrar<listenerType> catch_internal_RegistrarFor##listenerType; } \
+     CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS
+#else // CATCH_CONFIG_DISABLE
+
+#define CATCH_REGISTER_REPORTER(name, reporterType)
+#define CATCH_REGISTER_LISTENER(listenerType)
+
+#endif // CATCH_CONFIG_DISABLE
+
+// end catch_reporter_registrars.hpp
+// Allow users to base their work off existing reporters
+// start catch_reporter_compact.h
+
+namespace Catch {
+
+    struct CompactReporter : StreamingReporterBase<CompactReporter> {
+
+        using StreamingReporterBase::StreamingReporterBase;
+
+        ~CompactReporter() override;
+
+        static std::string getDescription();
+
+        ReporterPreferences getPreferences() const override;
+
+        void noMatchingTestCases(std::string const& spec) override;
+
+        void assertionStarting(AssertionInfo const&) override;
+
+        bool assertionEnded(AssertionStats const& _assertionStats) override;
+
+        void sectionEnded(SectionStats const& _sectionStats) override;
+
+        void testRunEnded(TestRunStats const& _testRunStats) override;
+
+    };
+
+} // end namespace Catch
+
+// end catch_reporter_compact.h
+// start catch_reporter_console.h
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4061) // Not all labels are EXPLICITLY handled in switch
+                              // Note that 4062 (not all labels are handled
+                              // and default is missing) is enabled
+#endif
+
+namespace Catch {
+    // Fwd decls
+    struct SummaryColumn;
+    class TablePrinter;
+
+    struct ConsoleReporter : StreamingReporterBase<ConsoleReporter> {
+        std::unique_ptr<TablePrinter> m_tablePrinter;
+
+        ConsoleReporter(ReporterConfig const& config);
+        ~ConsoleReporter() override;
+        static std::string getDescription();
+
+        void noMatchingTestCases(std::string const& spec) override;
+
+        void assertionStarting(AssertionInfo const&) override;
+
+        bool assertionEnded(AssertionStats const& _assertionStats) override;
+
+        void sectionStarting(SectionInfo const& _sectionInfo) override;
+        void sectionEnded(SectionStats const& _sectionStats) override;
+
+        void benchmarkStarting(BenchmarkInfo const& info) override;
+        void benchmarkEnded(BenchmarkStats const& stats) override;
+
+        void testCaseEnded(TestCaseStats const& _testCaseStats) override;
+        void testGroupEnded(TestGroupStats const& _testGroupStats) override;
+        void testRunEnded(TestRunStats const& _testRunStats) override;
+
+    private:
+
+        void lazyPrint();
+
+        void lazyPrintWithoutClosingBenchmarkTable();
+        void lazyPrintRunInfo();
+        void lazyPrintGroupInfo();
+        void printTestCaseAndSectionHeader();
+
+        void printClosedHeader(std::string const& _name);
+        void printOpenHeader(std::string const& _name);
+
+        // if string has a : in first line will set indent to follow it on
+        // subsequent lines
+        void printHeaderString(std::string const& _string, std::size_t indent = 0);
+
+        void printTotals(Totals const& totals);
+        void printSummaryRow(std::string const& label, std::vector<SummaryColumn> const& cols, std::size_t row);
+
+        void printTotalsDivider(Totals const& totals);
+        void printSummaryDivider();
+
+    private:
+        bool m_headerPrinted = false;
+    };
+
+} // end namespace Catch
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+// end catch_reporter_console.h
+// start catch_reporter_junit.h
+
+// start catch_xmlwriter.h
+
+#include <vector>
+
+namespace Catch {
+
+    class XmlEncode {
+    public:
+        enum ForWhat { ForTextNodes, ForAttributes };
+
+        XmlEncode( std::string const& str, ForWhat forWhat = ForTextNodes );
+
+        void encodeTo( std::ostream& os ) const;
+
+        friend std::ostream& operator << ( std::ostream& os, XmlEncode const& xmlEncode );
+
+    private:
+        std::string m_str;
+        ForWhat m_forWhat;
+    };
+
+    class XmlWriter {
+    public:
+
+        class ScopedElement {
+        public:
+            ScopedElement( XmlWriter* writer );
+
+            ScopedElement( ScopedElement&& other ) noexcept;
+            ScopedElement& operator=( ScopedElement&& other ) noexcept;
+
+            ~ScopedElement();
+
+            ScopedElement& writeText( std::string const& text, bool indent = true );
+
+            template<typename T>
+            ScopedElement& writeAttribute( std::string const& name, T const& attribute ) {
+                m_writer->writeAttribute( name, attribute );
+                return *this;
+            }
+
+        private:
+            mutable XmlWriter* m_writer = nullptr;
+        };
+
+        XmlWriter( std::ostream& os = Catch::cout() );
+        ~XmlWriter();
+
+        XmlWriter( XmlWriter const& ) = delete;
+        XmlWriter& operator=( XmlWriter const& ) = delete;
+
+        XmlWriter& startElement( std::string const& name );
+
+        ScopedElement scopedElement( std::string const& name );
+
+        XmlWriter& endElement();
+
+        XmlWriter& writeAttribute( std::string const& name, std::string const& attribute );
+
+        XmlWriter& writeAttribute( std::string const& name, bool attribute );
+
+        template<typename T>
+        XmlWriter& writeAttribute( std::string const& name, T const& attribute ) {
+            ReusableStringStream rss;
+            rss << attribute;
+            return writeAttribute( name, rss.str() );
+        }
+
+        XmlWriter& writeText( std::string const& text, bool indent = true );
+
+        XmlWriter& writeComment( std::string const& text );
+
+        void writeStylesheetRef( std::string const& url );
+
+        XmlWriter& writeBlankLine();
+
+        void ensureTagClosed();
+
+    private:
+
+        void writeDeclaration();
+
+        void newlineIfNecessary();
+
+        bool m_tagIsOpen = false;
+        bool m_needsNewline = false;
+        std::vector<std::string> m_tags;
+        std::string m_indent;
+        std::ostream& m_os;
+    };
+
+}
+
+// end catch_xmlwriter.h
+namespace Catch {
+
+    class JunitReporter : public CumulativeReporterBase<JunitReporter> {
+    public:
+        JunitReporter(ReporterConfig const& _config);
+
+        ~JunitReporter() override;
+
+        static std::string getDescription();
+
+        void noMatchingTestCases(std::string const& /*spec*/) override;
+
+        void testRunStarting(TestRunInfo const& runInfo) override;
+
+        void testGroupStarting(GroupInfo const& groupInfo) override;
+
+        void testCaseStarting(TestCaseInfo const& testCaseInfo) override;
+        bool assertionEnded(AssertionStats const& assertionStats) override;
+
+        void testCaseEnded(TestCaseStats const& testCaseStats) override;
+
+        void testGroupEnded(TestGroupStats const& testGroupStats) override;
+
+        void testRunEndedCumulative() override;
+
+        void writeGroup(TestGroupNode const& groupNode, double suiteTime);
+
+        void writeTestCase(TestCaseNode const& testCaseNode);
+
+        void writeSection(std::string const& className,
+                          std::string const& rootName,
+                          SectionNode const& sectionNode);
+
+        void writeAssertions(SectionNode const& sectionNode);
+        void writeAssertion(AssertionStats const& stats);
+
+        XmlWriter xml;
+        Timer suiteTimer;
+        std::string stdOutForSuite;
+        std::string stdErrForSuite;
+        unsigned int unexpectedExceptions = 0;
+        bool m_okToFail = false;
+    };
+
+} // end namespace Catch
+
+// end catch_reporter_junit.h
+// start catch_reporter_xml.h
+
+namespace Catch {
+    class XmlReporter : public StreamingReporterBase<XmlReporter> {
+    public:
+        XmlReporter(ReporterConfig const& _config);
+
+        ~XmlReporter() override;
+
+        static std::string getDescription();
+
+        virtual std::string getStylesheetRef() const;
+
+        void writeSourceInfo(SourceLineInfo const& sourceInfo);
+
+    public: // StreamingReporterBase
+
+        void noMatchingTestCases(std::string const& s) override;
+
+        void testRunStarting(TestRunInfo const& testInfo) override;
+
+        void testGroupStarting(GroupInfo const& groupInfo) override;
+
+        void testCaseStarting(TestCaseInfo const& testInfo) override;
+
+        void sectionStarting(SectionInfo const& sectionInfo) override;
+
+        void assertionStarting(AssertionInfo const&) override;
+
+        bool assertionEnded(AssertionStats const& assertionStats) override;
+
+        void sectionEnded(SectionStats const& sectionStats) override;
+
+        void testCaseEnded(TestCaseStats const& testCaseStats) override;
+
+        void testGroupEnded(TestGroupStats const& testGroupStats) override;
+
+        void testRunEnded(TestRunStats const& testRunStats) override;
+
+    private:
+        Timer m_testCaseTimer;
+        XmlWriter m_xml;
+        int m_sectionDepth = 0;
+    };
+
+} // end namespace Catch
+
+// end catch_reporter_xml.h
+
+// end catch_external_interfaces.h
+#endif
+
+#endif // ! CATCH_CONFIG_IMPL_ONLY
+
+#ifdef CATCH_IMPL
+// start catch_impl.hpp
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wweak-vtables"
+#endif
+
+// Keep these here for external reporters
+// start catch_test_case_tracker.h
+
+#include <string>
+#include <vector>
+#include <memory>
+
+namespace Catch {
+namespace TestCaseTracking {
+
+    struct NameAndLocation {
+        std::string name;
+        SourceLineInfo location;
+
+        NameAndLocation( std::string const& _name, SourceLineInfo const& _location );
+    };
+
+    struct ITracker;
+
+    using ITrackerPtr = std::shared_ptr<ITracker>;
+
+    struct ITracker {
+        virtual ~ITracker();
+
+        // static queries
+        virtual NameAndLocation const& nameAndLocation() const = 0;
+
+        // dynamic queries
+        virtual bool isComplete() const = 0; // Successfully completed or failed
+        virtual bool isSuccessfullyCompleted() const = 0;
+        virtual bool isOpen() const = 0; // Started but not complete
+        virtual bool hasChildren() const = 0;
+
+        virtual ITracker& parent() = 0;
+
+        // actions
+        virtual void close() = 0; // Successfully complete
+        virtual void fail() = 0;
+        virtual void markAsNeedingAnotherRun() = 0;
+
+        virtual void addChild( ITrackerPtr const& child ) = 0;
+        virtual ITrackerPtr findChild( NameAndLocation const& nameAndLocation ) = 0;
+        virtual void openChild() = 0;
+
+        // Debug/ checking
+        virtual bool isSectionTracker() const = 0;
+        virtual bool isIndexTracker() const = 0;
+    };
+
+    class TrackerContext {
+
+        enum RunState {
+            NotStarted,
+            Executing,
+            CompletedCycle
+        };
+
+        ITrackerPtr m_rootTracker;
+        ITracker* m_currentTracker = nullptr;
+        RunState m_runState = NotStarted;
+
+    public:
+
+        static TrackerContext& instance();
+
+        ITracker& startRun();
+        void endRun();
+
+        void startCycle();
+        void completeCycle();
+
+        bool completedCycle() const;
+        ITracker& currentTracker();
+        void setCurrentTracker( ITracker* tracker );
+    };
+
+    class TrackerBase : public ITracker {
+    protected:
+        enum CycleState {
+            NotStarted,
+            Executing,
+            ExecutingChildren,
+            NeedsAnotherRun,
+            CompletedSuccessfully,
+            Failed
+        };
+
+        using Children = std::vector<ITrackerPtr>;
+        NameAndLocation m_nameAndLocation;
+        TrackerContext& m_ctx;
+        ITracker* m_parent;
+        Children m_children;
+        CycleState m_runState = NotStarted;
+
+    public:
+        TrackerBase( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent );
+
+        NameAndLocation const& nameAndLocation() const override;
+        bool isComplete() const override;
+        bool isSuccessfullyCompleted() const override;
+        bool isOpen() const override;
+        bool hasChildren() const override;
+
+        void addChild( ITrackerPtr const& child ) override;
+
+        ITrackerPtr findChild( NameAndLocation const& nameAndLocation ) override;
+        ITracker& parent() override;
+
+        void openChild() override;
+
+        bool isSectionTracker() const override;
+        bool isIndexTracker() const override;
+
+        void open();
+
+        void close() override;
+        void fail() override;
+        void markAsNeedingAnotherRun() override;
+
+    private:
+        void moveToParent();
+        void moveToThis();
+    };
+
+    class SectionTracker : public TrackerBase {
+        std::vector<std::string> m_filters;
+    public:
+        SectionTracker( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent );
+
+        bool isSectionTracker() const override;
+
+        static SectionTracker& acquire( TrackerContext& ctx, NameAndLocation const& nameAndLocation );
+
+        void tryOpen();
+
+        void addInitialFilters( std::vector<std::string> const& filters );
+        void addNextFilters( std::vector<std::string> const& filters );
+    };
+
+    class IndexTracker : public TrackerBase {
+        int m_size;
+        int m_index = -1;
+    public:
+        IndexTracker( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent, int size );
+
+        bool isIndexTracker() const override;
+        void close() override;
+
+        static IndexTracker& acquire( TrackerContext& ctx, NameAndLocation const& nameAndLocation, int size );
+
+        int index() const;
+
+        void moveNext();
+    };
+
+} // namespace TestCaseTracking
+
+using TestCaseTracking::ITracker;
+using TestCaseTracking::TrackerContext;
+using TestCaseTracking::SectionTracker;
+using TestCaseTracking::IndexTracker;
+
+} // namespace Catch
+
+// end catch_test_case_tracker.h
+
+// start catch_leak_detector.h
+
+namespace Catch {
+
+    struct LeakDetector {
+        LeakDetector();
+        ~LeakDetector();
+    };
+
+}
+// end catch_leak_detector.h
+// Cpp files will be included in the single-header file here
+// start catch_approx.cpp
+
+#include <cmath>
+#include <limits>
+
+namespace {
+
+// Performs equivalent check of std::fabs(lhs - rhs) <= margin
+// But without the subtraction to allow for INFINITY in comparison
+bool marginComparison(double lhs, double rhs, double margin) {
+    return (lhs + margin >= rhs) && (rhs + margin >= lhs);
+}
+
+}
+
+namespace Catch {
+namespace Detail {
+
+    Approx::Approx ( double value )
+    :   m_epsilon( std::numeric_limits<float>::epsilon()*100 ),
+        m_margin( 0.0 ),
+        m_scale( 0.0 ),
+        m_value( value )
+    {}
+
+    Approx Approx::custom() {
+        return Approx( 0 );
+    }
+
+    Approx Approx::operator-() const {
+        auto temp(*this);
+        temp.m_value = -temp.m_value;
+        return temp;
+    }
+
+    std::string Approx::toString() const {
+        ReusableStringStream rss;
+        rss << "Approx( " << ::Catch::Detail::stringify( m_value ) << " )";
+        return rss.str();
+    }
+
+    bool Approx::equalityComparisonImpl(const double other) const {
+        // First try with fixed margin, then compute margin based on epsilon, scale and Approx's value
+        // Thanks to Richard Harris for his help refining the scaled margin value
+        return marginComparison(m_value, other, m_margin) || marginComparison(m_value, other, m_epsilon * (m_scale + std::fabs(m_value)));
+    }
+
+    void Approx::setMargin(double margin) {
+        CATCH_ENFORCE(margin >= 0,
+            "Invalid Approx::margin: " << margin << '.'
+            << " Approx::Margin has to be non-negative.");
+        m_margin = margin;
+    }
+
+    void Approx::setEpsilon(double epsilon) {
+        CATCH_ENFORCE(epsilon >= 0 && epsilon <= 1.0,
+            "Invalid Approx::epsilon: " << epsilon << '.'
+            << " Approx::epsilon has to be in [0, 1]");
+        m_epsilon = epsilon;
+    }
+
+} // end namespace Detail
+
+namespace literals {
+    Detail::Approx operator "" _a(long double val) {
+        return Detail::Approx(val);
+    }
+    Detail::Approx operator "" _a(unsigned long long val) {
+        return Detail::Approx(val);
+    }
+} // end namespace literals
+
+std::string StringMaker<Catch::Detail::Approx>::convert(Catch::Detail::Approx const& value) {
+    return value.toString();
+}
+
+} // end namespace Catch
+// end catch_approx.cpp
+// start catch_assertionhandler.cpp
+
+// start catch_context.h
+
+#include <memory>
+
+namespace Catch {
+
+    struct IResultCapture;
+    struct IRunner;
+    struct IConfig;
+    struct IMutableContext;
+
+    using IConfigPtr = std::shared_ptr<IConfig const>;
+
+    struct IContext
+    {
+        virtual ~IContext();
+
+        virtual IResultCapture* getResultCapture() = 0;
+        virtual IRunner* getRunner() = 0;
+        virtual IConfigPtr const& getConfig() const = 0;
+    };
+
+    struct IMutableContext : IContext
+    {
+        virtual ~IMutableContext();
+        virtual void setResultCapture( IResultCapture* resultCapture ) = 0;
+        virtual void setRunner( IRunner* runner ) = 0;
+        virtual void setConfig( IConfigPtr const& config ) = 0;
+
+    private:
+        static IMutableContext *currentContext;
+        friend IMutableContext& getCurrentMutableContext();
+        friend void cleanUpContext();
+        static void createContext();
+    };
+
+    inline IMutableContext& getCurrentMutableContext()
+    {
+        if( !IMutableContext::currentContext )
+            IMutableContext::createContext();
+        return *IMutableContext::currentContext;
+    }
+
+    inline IContext& getCurrentContext()
+    {
+        return getCurrentMutableContext();
+    }
+
+    void cleanUpContext();
+}
+
+// end catch_context.h
+// start catch_debugger.h
+
+namespace Catch {
+    bool isDebuggerActive();
+}
+
+#ifdef CATCH_PLATFORM_MAC
+
+    #define CATCH_TRAP() __asm__("int $3\n" : : ) /* NOLINT */
+
+#elif defined(CATCH_PLATFORM_LINUX)
+    // If we can use inline assembler, do it because this allows us to break
+    // directly at the location of the failing check instead of breaking inside
+    // raise() called from it, i.e. one stack frame below.
+    #if defined(__GNUC__) && (defined(__i386) || defined(__x86_64))
+        #define CATCH_TRAP() asm volatile ("int $3") /* NOLINT */
+    #else // Fall back to the generic way.
+        #include <signal.h>
+
+        #define CATCH_TRAP() raise(SIGTRAP)
+    #endif
+#elif defined(_MSC_VER)
+    #define CATCH_TRAP() __debugbreak()
+#elif defined(__MINGW32__)
+    extern "C" __declspec(dllimport) void __stdcall DebugBreak();
+    #define CATCH_TRAP() DebugBreak()
+#endif
+
+#ifdef CATCH_TRAP
+    #define CATCH_BREAK_INTO_DEBUGGER() if( Catch::isDebuggerActive() ) { CATCH_TRAP(); }
+#else
+    namespace Catch {
+        inline void doNothing() {}
+    }
+    #define CATCH_BREAK_INTO_DEBUGGER() Catch::doNothing()
+#endif
+
+// end catch_debugger.h
+// start catch_run_context.h
+
+// start catch_fatal_condition.h
+
+// start catch_windows_h_proxy.h
+
+
+#if defined(CATCH_PLATFORM_WINDOWS)
+
+#if !defined(NOMINMAX) && !defined(CATCH_CONFIG_NO_NOMINMAX)
+#  define CATCH_DEFINED_NOMINMAX
+#  define NOMINMAX
+#endif
+#if !defined(WIN32_LEAN_AND_MEAN) && !defined(CATCH_CONFIG_NO_WIN32_LEAN_AND_MEAN)
+#  define CATCH_DEFINED_WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+#endif
+
+#ifdef __AFXDLL
+#include <AfxWin.h>
+#else
+#include <windows.h>
+#endif
+
+#ifdef CATCH_DEFINED_NOMINMAX
+#  undef NOMINMAX
+#endif
+#ifdef CATCH_DEFINED_WIN32_LEAN_AND_MEAN
+#  undef WIN32_LEAN_AND_MEAN
+#endif
+
+#endif // defined(CATCH_PLATFORM_WINDOWS)
+
+// end catch_windows_h_proxy.h
+#if defined( CATCH_CONFIG_WINDOWS_SEH )
+
+namespace Catch {
+
+    struct FatalConditionHandler {
+
+        static LONG CALLBACK handleVectoredException(PEXCEPTION_POINTERS ExceptionInfo);
+        FatalConditionHandler();
+        static void reset();
+        ~FatalConditionHandler();
+
+    private:
+        static bool isSet;
+        static ULONG guaranteeSize;
+        static PVOID exceptionHandlerHandle;
+    };
+
+} // namespace Catch
+
+#elif defined ( CATCH_CONFIG_POSIX_SIGNALS )
+
+#include <signal.h>
+
+namespace Catch {
+
+    struct FatalConditionHandler {
+
+        static bool isSet;
+        static struct sigaction oldSigActions[];
+        static stack_t oldSigStack;
+        static char altStackMem[];
+
+        static void handleSignal( int sig );
+
+        FatalConditionHandler();
+        ~FatalConditionHandler();
+        static void reset();
+    };
+
+} // namespace Catch
+
+#else
+
+namespace Catch {
+    struct FatalConditionHandler {
+        void reset();
+    };
+}
+
+#endif
+
+// end catch_fatal_condition.h
+#include <string>
+
+namespace Catch {
+
+    struct IMutableContext;
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    class RunContext : public IResultCapture, public IRunner {
+
+    public:
+        RunContext( RunContext const& ) = delete;
+        RunContext& operator =( RunContext const& ) = delete;
+
+        explicit RunContext( IConfigPtr const& _config, IStreamingReporterPtr&& reporter );
+
+        ~RunContext() override;
+
+        void testGroupStarting( std::string const& testSpec, std::size_t groupIndex, std::size_t groupsCount );
+        void testGroupEnded( std::string const& testSpec, Totals const& totals, std::size_t groupIndex, std::size_t groupsCount );
+
+        Totals runTest(TestCase const& testCase);
+
+        IConfigPtr config() const;
+        IStreamingReporter& reporter() const;
+
+    public: // IResultCapture
+
+        // Assertion handlers
+        void handleExpr
+                (   AssertionInfo const& info,
+                    ITransientExpression const& expr,
+                    AssertionReaction& reaction ) override;
+        void handleMessage
+                (   AssertionInfo const& info,
+                    ResultWas::OfType resultType,
+                    StringRef const& message,
+                    AssertionReaction& reaction ) override;
+        void handleUnexpectedExceptionNotThrown
+                (   AssertionInfo const& info,
+                    AssertionReaction& reaction ) override;
+        void handleUnexpectedInflightException
+                (   AssertionInfo const& info,
+                    std::string const& message,
+                    AssertionReaction& reaction ) override;
+        void handleIncomplete
+                (   AssertionInfo const& info ) override;
+        void handleNonExpr
+                (   AssertionInfo const &info,
+                    ResultWas::OfType resultType,
+                    AssertionReaction &reaction ) override;
+
+        bool sectionStarted( SectionInfo const& sectionInfo, Counts& assertions ) override;
+
+        void sectionEnded( SectionEndInfo const& endInfo ) override;
+        void sectionEndedEarly( SectionEndInfo const& endInfo ) override;
+
+        auto acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker& override;
+
+        void benchmarkStarting( BenchmarkInfo const& info ) override;
+        void benchmarkEnded( BenchmarkStats const& stats ) override;
+
+        void pushScopedMessage( MessageInfo const& message ) override;
+        void popScopedMessage( MessageInfo const& message ) override;
+
+        std::string getCurrentTestName() const override;
+
+        const AssertionResult* getLastResult() const override;
+
+        void exceptionEarlyReported() override;
+
+        void handleFatalErrorCondition( StringRef message ) override;
+
+        bool lastAssertionPassed() override;
+
+        void assertionPassed() override;
+
+    public:
+        // !TBD We need to do this another way!
+        bool aborting() const final;
+
+    private:
+
+        void runCurrentTest( std::string& redirectedCout, std::string& redirectedCerr );
+        void invokeActiveTestCase();
+
+        void resetAssertionInfo();
+        bool testForMissingAssertions( Counts& assertions );
+
+        void assertionEnded( AssertionResult const& result );
+        void reportExpr
+                (   AssertionInfo const &info,
+                    ResultWas::OfType resultType,
+                    ITransientExpression const *expr,
+                    bool negated );
+
+        void populateReaction( AssertionReaction& reaction );
+
+    private:
+
+        void handleUnfinishedSections();
+
+        TestRunInfo m_runInfo;
+        IMutableContext& m_context;
+        TestCase const* m_activeTestCase = nullptr;
+        ITracker* m_testCaseTracker;
+        Option<AssertionResult> m_lastResult;
+
+        IConfigPtr m_config;
+        Totals m_totals;
+        IStreamingReporterPtr m_reporter;
+        std::vector<MessageInfo> m_messages;
+        AssertionInfo m_lastAssertionInfo;
+        std::vector<SectionEndInfo> m_unfinishedSections;
+        std::vector<ITracker*> m_activeSections;
+        TrackerContext m_trackerContext;
+        bool m_lastAssertionPassed = false;
+        bool m_shouldReportUnexpected = true;
+        bool m_includeSuccessfulResults;
+    };
+
+} // end namespace Catch
+
+// end catch_run_context.h
+namespace Catch {
+
+    namespace {
+        auto operator <<( std::ostream& os, ITransientExpression const& expr ) -> std::ostream& {
+            expr.streamReconstructedExpression( os );
+            return os;
+        }
+    }
+
+    LazyExpression::LazyExpression( bool isNegated )
+    :   m_isNegated( isNegated )
+    {}
+
+    LazyExpression::LazyExpression( LazyExpression const& other ) : m_isNegated( other.m_isNegated ) {}
+
+    LazyExpression::operator bool() const {
+        return m_transientExpression != nullptr;
+    }
+
+    auto operator << ( std::ostream& os, LazyExpression const& lazyExpr ) -> std::ostream& {
+        if( lazyExpr.m_isNegated )
+            os << "!";
+
+        if( lazyExpr ) {
+            if( lazyExpr.m_isNegated && lazyExpr.m_transientExpression->isBinaryExpression() )
+                os << "(" << *lazyExpr.m_transientExpression << ")";
+            else
+                os << *lazyExpr.m_transientExpression;
+        }
+        else {
+            os << "{** error - unchecked empty expression requested **}";
+        }
+        return os;
+    }
+
+    AssertionHandler::AssertionHandler
+        (   StringRef const& macroName,
+            SourceLineInfo const& lineInfo,
+            StringRef capturedExpression,
+            ResultDisposition::Flags resultDisposition )
+    :   m_assertionInfo{ macroName, lineInfo, capturedExpression, resultDisposition },
+        m_resultCapture( getResultCapture() )
+    {}
+
+    void AssertionHandler::handleExpr( ITransientExpression const& expr ) {
+        m_resultCapture.handleExpr( m_assertionInfo, expr, m_reaction );
+    }
+    void AssertionHandler::handleMessage(ResultWas::OfType resultType, StringRef const& message) {
+        m_resultCapture.handleMessage( m_assertionInfo, resultType, message, m_reaction );
+    }
+
+    auto AssertionHandler::allowThrows() const -> bool {
+        return getCurrentContext().getConfig()->allowThrows();
+    }
+
+    void AssertionHandler::complete() {
+        setCompleted();
+        if( m_reaction.shouldDebugBreak ) {
+
+            // If you find your debugger stopping you here then go one level up on the
+            // call-stack for the code that caused it (typically a failed assertion)
+
+            // (To go back to the test and change execution, jump over the throw, next)
+            CATCH_BREAK_INTO_DEBUGGER();
+        }
+        if (m_reaction.shouldThrow) {
+#if !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+            throw Catch::TestFailureException();
+#else
+            CATCH_ERROR( "Test failure requires aborting test!" );
+#endif
+        }
+    }
+    void AssertionHandler::setCompleted() {
+        m_completed = true;
+    }
+
+    void AssertionHandler::handleUnexpectedInflightException() {
+        m_resultCapture.handleUnexpectedInflightException( m_assertionInfo, Catch::translateActiveException(), m_reaction );
+    }
+
+    void AssertionHandler::handleExceptionThrownAsExpected() {
+        m_resultCapture.handleNonExpr(m_assertionInfo, ResultWas::Ok, m_reaction);
+    }
+    void AssertionHandler::handleExceptionNotThrownAsExpected() {
+        m_resultCapture.handleNonExpr(m_assertionInfo, ResultWas::Ok, m_reaction);
+    }
+
+    void AssertionHandler::handleUnexpectedExceptionNotThrown() {
+        m_resultCapture.handleUnexpectedExceptionNotThrown( m_assertionInfo, m_reaction );
+    }
+
+    void AssertionHandler::handleThrowingCallSkipped() {
+        m_resultCapture.handleNonExpr(m_assertionInfo, ResultWas::Ok, m_reaction);
+    }
+
+    // This is the overload that takes a string and infers the Equals matcher from it
+    // The more general overload, that takes any string matcher, is in catch_capture_matchers.cpp
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef const& matcherString  ) {
+        handleExceptionMatchExpr( handler, Matchers::Equals( str ), matcherString );
+    }
+
+} // namespace Catch
+// end catch_assertionhandler.cpp
+// start catch_assertionresult.cpp
+
+namespace Catch {
+    AssertionResultData::AssertionResultData(ResultWas::OfType _resultType, LazyExpression const & _lazyExpression):
+        lazyExpression(_lazyExpression),
+        resultType(_resultType) {}
+
+    std::string AssertionResultData::reconstructExpression() const {
+
+        if( reconstructedExpression.empty() ) {
+            if( lazyExpression ) {
+                ReusableStringStream rss;
+                rss << lazyExpression;
+                reconstructedExpression = rss.str();
+            }
+        }
+        return reconstructedExpression;
+    }
+
+    AssertionResult::AssertionResult( AssertionInfo const& info, AssertionResultData const& data )
+    :   m_info( info ),
+        m_resultData( data )
+    {}
+
+    // Result was a success
+    bool AssertionResult::succeeded() const {
+        return Catch::isOk( m_resultData.resultType );
+    }
+
+    // Result was a success, or failure is suppressed
+    bool AssertionResult::isOk() const {
+        return Catch::isOk( m_resultData.resultType ) || shouldSuppressFailure( m_info.resultDisposition );
+    }
+
+    ResultWas::OfType AssertionResult::getResultType() const {
+        return m_resultData.resultType;
+    }
+
+    bool AssertionResult::hasExpression() const {
+        return m_info.capturedExpression[0] != 0;
+    }
+
+    bool AssertionResult::hasMessage() const {
+        return !m_resultData.message.empty();
+    }
+
+    std::string AssertionResult::getExpression() const {
+        if( isFalseTest( m_info.resultDisposition ) )
+            return "!(" + m_info.capturedExpression + ")";
+        else
+            return m_info.capturedExpression;
+    }
+
+    std::string AssertionResult::getExpressionInMacro() const {
+        std::string expr;
+        if( m_info.macroName[0] == 0 )
+            expr = m_info.capturedExpression;
+        else {
+            expr.reserve( m_info.macroName.size() + m_info.capturedExpression.size() + 4 );
+            expr += m_info.macroName;
+            expr += "( ";
+            expr += m_info.capturedExpression;
+            expr += " )";
+        }
+        return expr;
+    }
+
+    bool AssertionResult::hasExpandedExpression() const {
+        return hasExpression() && getExpandedExpression() != getExpression();
+    }
+
+    std::string AssertionResult::getExpandedExpression() const {
+        std::string expr = m_resultData.reconstructExpression();
+        return expr.empty()
+                ? getExpression()
+                : expr;
+    }
+
+    std::string AssertionResult::getMessage() const {
+        return m_resultData.message;
+    }
+    SourceLineInfo AssertionResult::getSourceInfo() const {
+        return m_info.lineInfo;
+    }
+
+    StringRef AssertionResult::getTestMacroName() const {
+        return m_info.macroName;
+    }
+
+} // end namespace Catch
+// end catch_assertionresult.cpp
+// start catch_benchmark.cpp
+
+namespace Catch {
+
+    auto BenchmarkLooper::getResolution() -> uint64_t {
+        return getEstimatedClockResolution() * getCurrentContext().getConfig()->benchmarkResolutionMultiple();
+    }
+
+    void BenchmarkLooper::reportStart() {
+        getResultCapture().benchmarkStarting( { m_name } );
+    }
+    auto BenchmarkLooper::needsMoreIterations() -> bool {
+        auto elapsed = m_timer.getElapsedNanoseconds();
+
+        // Exponentially increasing iterations until we're confident in our timer resolution
+        if( elapsed < m_resolution ) {
+            m_iterationsToRun *= 10;
+            return true;
+        }
+
+        getResultCapture().benchmarkEnded( { { m_name }, m_count, elapsed } );
+        return false;
+    }
+
+} // end namespace Catch
+// end catch_benchmark.cpp
+// start catch_capture_matchers.cpp
+
+namespace Catch {
+
+    using StringMatcher = Matchers::Impl::MatcherBase<std::string>;
+
+    // This is the general overload that takes a any string matcher
+    // There is another overload, in catch_assertionhandler.h/.cpp, that only takes a string and infers
+    // the Equals matcher (so the header does not mention matchers)
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef const& matcherString  ) {
+        std::string exceptionMessage = Catch::translateActiveException();
+        MatchExpr<std::string, StringMatcher const&> expr( exceptionMessage, matcher, matcherString );
+        handler.handleExpr( expr );
+    }
+
+} // namespace Catch
+// end catch_capture_matchers.cpp
+// start catch_commandline.cpp
+
+// start catch_commandline.h
+
+// start catch_clara.h
+
+// Use Catch's value for console width (store Clara's off to the side, if present)
+#ifdef CLARA_CONFIG_CONSOLE_WIDTH
+#define CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH
+#undef CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH
+#endif
+#define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH CATCH_CONFIG_CONSOLE_WIDTH-1
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wweak-vtables"
+#pragma clang diagnostic ignored "-Wexit-time-destructors"
+#pragma clang diagnostic ignored "-Wshadow"
+#endif
+
+// start clara.hpp
+// Copyright 2017 Two Blue Cubes Ltd. All rights reserved.
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// See https://github.com/philsquared/Clara for more details
+
+// Clara v1.1.5
+
+
+#ifndef CATCH_CLARA_CONFIG_CONSOLE_WIDTH
+#define CATCH_CLARA_CONFIG_CONSOLE_WIDTH 80
+#endif
+
+#ifndef CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH
+#define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH CATCH_CLARA_CONFIG_CONSOLE_WIDTH
+#endif
+
+#ifndef CLARA_CONFIG_OPTIONAL_TYPE
+#ifdef __has_include
+#if __has_include(<optional>) && __cplusplus >= 201703L
+#include <optional>
+#define CLARA_CONFIG_OPTIONAL_TYPE std::optional
+#endif
+#endif
+#endif
+
+// ----------- #included from clara_textflow.hpp -----------
+
+// TextFlowCpp
+//
+// A single-header library for wrapping and laying out basic text, by Phil Nash
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// This project is hosted at https://github.com/philsquared/textflowcpp
+
+
+#include <cassert>
+#include <ostream>
+#include <sstream>
+#include <vector>
+
+#ifndef CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH
+#define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH 80
+#endif
+
+namespace Catch {
+namespace clara {
+namespace TextFlow {
+
+inline auto isWhitespace(char c) -> bool {
+	static std::string chars = " \t\n\r";
+	return chars.find(c) != std::string::npos;
+}
+inline auto isBreakableBefore(char c) -> bool {
+	static std::string chars = "[({<|";
+	return chars.find(c) != std::string::npos;
+}
+inline auto isBreakableAfter(char c) -> bool {
+	static std::string chars = "])}>.,:;*+-=&/\\";
+	return chars.find(c) != std::string::npos;
+}
+
+class Columns;
+
+class Column {
+	std::vector<std::string> m_strings;
+	size_t m_width = CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH;
+	size_t m_indent = 0;
+	size_t m_initialIndent = std::string::npos;
+
+public:
+	class iterator {
+		friend Column;
+
+		Column const& m_column;
+		size_t m_stringIndex = 0;
+		size_t m_pos = 0;
+
+		size_t m_len = 0;
+		size_t m_end = 0;
+		bool m_suffix = false;
+
+		iterator(Column const& column, size_t stringIndex)
+			: m_column(column),
+			m_stringIndex(stringIndex) {}
+
+		auto line() const -> std::string const& { return m_column.m_strings[m_stringIndex]; }
+
+		auto isBoundary(size_t at) const -> bool {
+			assert(at > 0);
+			assert(at <= line().size());
+
+			return at == line().size() ||
+				(isWhitespace(line()[at]) && !isWhitespace(line()[at - 1])) ||
+				isBreakableBefore(line()[at]) ||
+				isBreakableAfter(line()[at - 1]);
+		}
+
+		void calcLength() {
+			assert(m_stringIndex < m_column.m_strings.size());
+
+			m_suffix = false;
+			auto width = m_column.m_width - indent();
+			m_end = m_pos;
+			while (m_end < line().size() && line()[m_end] != '\n')
+				++m_end;
+
+			if (m_end < m_pos + width) {
+				m_len = m_end - m_pos;
+			} else {
+				size_t len = width;
+				while (len > 0 && !isBoundary(m_pos + len))
+					--len;
+				while (len > 0 && isWhitespace(line()[m_pos + len - 1]))
+					--len;
+
+				if (len > 0) {
+					m_len = len;
+				} else {
+					m_suffix = true;
+					m_len = width - 1;
+				}
+			}
+		}
+
+		auto indent() const -> size_t {
+			auto initial = m_pos == 0 && m_stringIndex == 0 ? m_column.m_initialIndent : std::string::npos;
+			return initial == std::string::npos ? m_column.m_indent : initial;
+		}
+
+		auto addIndentAndSuffix(std::string const &plain) const -> std::string {
+			return std::string(indent(), ' ') + (m_suffix ? plain + "-" : plain);
+		}
+
+	public:
+		using difference_type = std::ptrdiff_t;
+		using value_type = std::string;
+		using pointer = value_type * ;
+		using reference = value_type & ;
+		using iterator_category = std::forward_iterator_tag;
+
+		explicit iterator(Column const& column) : m_column(column) {
+			assert(m_column.m_width > m_column.m_indent);
+			assert(m_column.m_initialIndent == std::string::npos || m_column.m_width > m_column.m_initialIndent);
+			calcLength();
+			if (m_len == 0)
+				m_stringIndex++; // Empty string
+		}
+
+		auto operator *() const -> std::string {
+			assert(m_stringIndex < m_column.m_strings.size());
+			assert(m_pos <= m_end);
+			return addIndentAndSuffix(line().substr(m_pos, m_len));
+		}
+
+		auto operator ++() -> iterator& {
+			m_pos += m_len;
+			if (m_pos < line().size() && line()[m_pos] == '\n')
+				m_pos += 1;
+			else
+				while (m_pos < line().size() && isWhitespace(line()[m_pos]))
+					++m_pos;
+
+			if (m_pos == line().size()) {
+				m_pos = 0;
+				++m_stringIndex;
+			}
+			if (m_stringIndex < m_column.m_strings.size())
+				calcLength();
+			return *this;
+		}
+		auto operator ++(int) -> iterator {
+			iterator prev(*this);
+			operator++();
+			return prev;
+		}
+
+		auto operator ==(iterator const& other) const -> bool {
+			return
+				m_pos == other.m_pos &&
+				m_stringIndex == other.m_stringIndex &&
+				&m_column == &other.m_column;
+		}
+		auto operator !=(iterator const& other) const -> bool {
+			return !operator==(other);
+		}
+	};
+	using const_iterator = iterator;
+
+	explicit Column(std::string const& text) { m_strings.push_back(text); }
+
+	auto width(size_t newWidth) -> Column& {
+		assert(newWidth > 0);
+		m_width = newWidth;
+		return *this;
+	}
+	auto indent(size_t newIndent) -> Column& {
+		m_indent = newIndent;
+		return *this;
+	}
+	auto initialIndent(size_t newIndent) -> Column& {
+		m_initialIndent = newIndent;
+		return *this;
+	}
+
+	auto width() const -> size_t { return m_width; }
+	auto begin() const -> iterator { return iterator(*this); }
+	auto end() const -> iterator { return { *this, m_strings.size() }; }
+
+	inline friend std::ostream& operator << (std::ostream& os, Column const& col) {
+		bool first = true;
+		for (auto line : col) {
+			if (first)
+				first = false;
+			else
+				os << "\n";
+			os << line;
+		}
+		return os;
+	}
+
+	auto operator + (Column const& other)->Columns;
+
+	auto toString() const -> std::string {
+		std::ostringstream oss;
+		oss << *this;
+		return oss.str();
+	}
+};
+
+class Spacer : public Column {
+
+public:
+	explicit Spacer(size_t spaceWidth) : Column("") {
+		width(spaceWidth);
+	}
+};
+
+class Columns {
+	std::vector<Column> m_columns;
+
+public:
+
+	class iterator {
+		friend Columns;
+		struct EndTag {};
+
+		std::vector<Column> const& m_columns;
+		std::vector<Column::iterator> m_iterators;
+		size_t m_activeIterators;
+
+		iterator(Columns const& columns, EndTag)
+			: m_columns(columns.m_columns),
+			m_activeIterators(0) {
+			m_iterators.reserve(m_columns.size());
+
+			for (auto const& col : m_columns)
+				m_iterators.push_back(col.end());
+		}
+
+	public:
+		using difference_type = std::ptrdiff_t;
+		using value_type = std::string;
+		using pointer = value_type * ;
+		using reference = value_type & ;
+		using iterator_category = std::forward_iterator_tag;
+
+		explicit iterator(Columns const& columns)
+			: m_columns(columns.m_columns),
+			m_activeIterators(m_columns.size()) {
+			m_iterators.reserve(m_columns.size());
+
+			for (auto const& col : m_columns)
+				m_iterators.push_back(col.begin());
+		}
+
+		auto operator ==(iterator const& other) const -> bool {
+			return m_iterators == other.m_iterators;
+		}
+		auto operator !=(iterator const& other) const -> bool {
+			return m_iterators != other.m_iterators;
+		}
+		auto operator *() const -> std::string {
+			std::string row, padding;
+
+			for (size_t i = 0; i < m_columns.size(); ++i) {
+				auto width = m_columns[i].width();
+				if (m_iterators[i] != m_columns[i].end()) {
+					std::string col = *m_iterators[i];
+					row += padding + col;
+					if (col.size() < width)
+						padding = std::string(width - col.size(), ' ');
+					else
+						padding = "";
+				} else {
+					padding += std::string(width, ' ');
+				}
+			}
+			return row;
+		}
+		auto operator ++() -> iterator& {
+			for (size_t i = 0; i < m_columns.size(); ++i) {
+				if (m_iterators[i] != m_columns[i].end())
+					++m_iterators[i];
+			}
+			return *this;
+		}
+		auto operator ++(int) -> iterator {
+			iterator prev(*this);
+			operator++();
+			return prev;
+		}
+	};
+	using const_iterator = iterator;
+
+	auto begin() const -> iterator { return iterator(*this); }
+	auto end() const -> iterator { return { *this, iterator::EndTag() }; }
+
+	auto operator += (Column const& col) -> Columns& {
+		m_columns.push_back(col);
+		return *this;
+	}
+	auto operator + (Column const& col) -> Columns {
+		Columns combined = *this;
+		combined += col;
+		return combined;
+	}
+
+	inline friend std::ostream& operator << (std::ostream& os, Columns const& cols) {
+
+		bool first = true;
+		for (auto line : cols) {
+			if (first)
+				first = false;
+			else
+				os << "\n";
+			os << line;
+		}
+		return os;
+	}
+
+	auto toString() const -> std::string {
+		std::ostringstream oss;
+		oss << *this;
+		return oss.str();
+	}
+};
+
+inline auto Column::operator + (Column const& other) -> Columns {
+	Columns cols;
+	cols += *this;
+	cols += other;
+	return cols;
+}
+}
+
+}
+}
+
+// ----------- end of #include from clara_textflow.hpp -----------
+// ........... back in clara.hpp
+
+#include <string>
+#include <memory>
+#include <set>
+#include <algorithm>
+
+#if !defined(CATCH_PLATFORM_WINDOWS) && ( defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || defined(_MSC_VER) )
+#define CATCH_PLATFORM_WINDOWS
+#endif
+
+namespace Catch { namespace clara {
+namespace detail {
+
+    // Traits for extracting arg and return type of lambdas (for single argument lambdas)
+    template<typename L>
+    struct UnaryLambdaTraits : UnaryLambdaTraits<decltype( &L::operator() )> {};
+
+    template<typename ClassT, typename ReturnT, typename... Args>
+    struct UnaryLambdaTraits<ReturnT( ClassT::* )( Args... ) const> {
+        static const bool isValid = false;
+    };
+
+    template<typename ClassT, typename ReturnT, typename ArgT>
+    struct UnaryLambdaTraits<ReturnT( ClassT::* )( ArgT ) const> {
+        static const bool isValid = true;
+        using ArgType = typename std::remove_const<typename std::remove_reference<ArgT>::type>::type;
+        using ReturnType = ReturnT;
+    };
+
+    class TokenStream;
+
+    // Transport for raw args (copied from main args, or supplied via init list for testing)
+    class Args {
+        friend TokenStream;
+        std::string m_exeName;
+        std::vector<std::string> m_args;
+
+    public:
+        Args( int argc, char const* const* argv )
+            : m_exeName(argv[0]),
+              m_args(argv + 1, argv + argc) {}
+
+        Args( std::initializer_list<std::string> args )
+        :   m_exeName( *args.begin() ),
+            m_args( args.begin()+1, args.end() )
+        {}
+
+        auto exeName() const -> std::string {
+            return m_exeName;
+        }
+    };
+
+    // Wraps a token coming from a token stream. These may not directly correspond to strings as a single string
+    // may encode an option + its argument if the : or = form is used
+    enum class TokenType {
+        Option, Argument
+    };
+    struct Token {
+        TokenType type;
+        std::string token;
+    };
+
+    inline auto isOptPrefix( char c ) -> bool {
+        return c == '-'
+#ifdef CATCH_PLATFORM_WINDOWS
+            || c == '/'
+#endif
+        ;
+    }
+
+    // Abstracts iterators into args as a stream of tokens, with option arguments uniformly handled
+    class TokenStream {
+        using Iterator = std::vector<std::string>::const_iterator;
+        Iterator it;
+        Iterator itEnd;
+        std::vector<Token> m_tokenBuffer;
+
+        void loadBuffer() {
+            m_tokenBuffer.resize( 0 );
+
+            // Skip any empty strings
+            while( it != itEnd && it->empty() )
+                ++it;
+
+            if( it != itEnd ) {
+                auto const &next = *it;
+                if( isOptPrefix( next[0] ) ) {
+                    auto delimiterPos = next.find_first_of( " :=" );
+                    if( delimiterPos != std::string::npos ) {
+                        m_tokenBuffer.push_back( { TokenType::Option, next.substr( 0, delimiterPos ) } );
+                        m_tokenBuffer.push_back( { TokenType::Argument, next.substr( delimiterPos + 1 ) } );
+                    } else {
+                        if( next[1] != '-' && next.size() > 2 ) {
+                            std::string opt = "- ";
+                            for( size_t i = 1; i < next.size(); ++i ) {
+                                opt[1] = next[i];
+                                m_tokenBuffer.push_back( { TokenType::Option, opt } );
+                            }
+                        } else {
+                            m_tokenBuffer.push_back( { TokenType::Option, next } );
+                        }
+                    }
+                } else {
+                    m_tokenBuffer.push_back( { TokenType::Argument, next } );
+                }
+            }
+        }
+
+    public:
+        explicit TokenStream( Args const &args ) : TokenStream( args.m_args.begin(), args.m_args.end() ) {}
+
+        TokenStream( Iterator it, Iterator itEnd ) : it( it ), itEnd( itEnd ) {
+            loadBuffer();
+        }
+
+        explicit operator bool() const {
+            return !m_tokenBuffer.empty() || it != itEnd;
+        }
+
+        auto count() const -> size_t { return m_tokenBuffer.size() + (itEnd - it); }
+
+        auto operator*() const -> Token {
+            assert( !m_tokenBuffer.empty() );
+            return m_tokenBuffer.front();
+        }
+
+        auto operator->() const -> Token const * {
+            assert( !m_tokenBuffer.empty() );
+            return &m_tokenBuffer.front();
+        }
+
+        auto operator++() -> TokenStream & {
+            if( m_tokenBuffer.size() >= 2 ) {
+                m_tokenBuffer.erase( m_tokenBuffer.begin() );
+            } else {
+                if( it != itEnd )
+                    ++it;
+                loadBuffer();
+            }
+            return *this;
+        }
+    };
+
+    class ResultBase {
+    public:
+        enum Type {
+            Ok, LogicError, RuntimeError
+        };
+
+    protected:
+        ResultBase( Type type ) : m_type( type ) {}
+        virtual ~ResultBase() = default;
+
+        virtual void enforceOk() const = 0;
+
+        Type m_type;
+    };
+
+    template<typename T>
+    class ResultValueBase : public ResultBase {
+    public:
+        auto value() const -> T const & {
+            enforceOk();
+            return m_value;
+        }
+
+    protected:
+        ResultValueBase( Type type ) : ResultBase( type ) {}
+
+        ResultValueBase( ResultValueBase const &other ) : ResultBase( other ) {
+            if( m_type == ResultBase::Ok )
+                new( &m_value ) T( other.m_value );
+        }
+
+        ResultValueBase( Type, T const &value ) : ResultBase( Ok ) {
+            new( &m_value ) T( value );
+        }
+
+        auto operator=( ResultValueBase const &other ) -> ResultValueBase & {
+            if( m_type == ResultBase::Ok )
+                m_value.~T();
+            ResultBase::operator=(other);
+            if( m_type == ResultBase::Ok )
+                new( &m_value ) T( other.m_value );
+            return *this;
+        }
+
+        ~ResultValueBase() override {
+            if( m_type == Ok )
+                m_value.~T();
+        }
+
+        union {
+            T m_value;
+        };
+    };
+
+    template<>
+    class ResultValueBase<void> : public ResultBase {
+    protected:
+        using ResultBase::ResultBase;
+    };
+
+    template<typename T = void>
+    class BasicResult : public ResultValueBase<T> {
+    public:
+        template<typename U>
+        explicit BasicResult( BasicResult<U> const &other )
+        :   ResultValueBase<T>( other.type() ),
+            m_errorMessage( other.errorMessage() )
+        {
+            assert( type() != ResultBase::Ok );
+        }
+
+        template<typename U>
+        static auto ok( U const &value ) -> BasicResult { return { ResultBase::Ok, value }; }
+        static auto ok() -> BasicResult { return { ResultBase::Ok }; }
+        static auto logicError( std::string const &message ) -> BasicResult { return { ResultBase::LogicError, message }; }
+        static auto runtimeError( std::string const &message ) -> BasicResult { return { ResultBase::RuntimeError, message }; }
+
+        explicit operator bool() const { return m_type == ResultBase::Ok; }
+        auto type() const -> ResultBase::Type { return m_type; }
+        auto errorMessage() const -> std::string { return m_errorMessage; }
+
+    protected:
+        void enforceOk() const override {
+
+            // Errors shouldn't reach this point, but if they do
+            // the actual error message will be in m_errorMessage
+            assert( m_type != ResultBase::LogicError );
+            assert( m_type != ResultBase::RuntimeError );
+            if( m_type != ResultBase::Ok )
+                std::abort();
+        }
+
+        std::string m_errorMessage; // Only populated if resultType is an error
+
+        BasicResult( ResultBase::Type type, std::string const &message )
+        :   ResultValueBase<T>(type),
+            m_errorMessage(message)
+        {
+            assert( m_type != ResultBase::Ok );
+        }
+
+        using ResultValueBase<T>::ResultValueBase;
+        using ResultBase::m_type;
+    };
+
+    enum class ParseResultType {
+        Matched, NoMatch, ShortCircuitAll, ShortCircuitSame
+    };
+
+    class ParseState {
+    public:
+
+        ParseState( ParseResultType type, TokenStream const &remainingTokens )
+        : m_type(type),
+          m_remainingTokens( remainingTokens )
+        {}
+
+        auto type() const -> ParseResultType { return m_type; }
+        auto remainingTokens() const -> TokenStream { return m_remainingTokens; }
+
+    private:
+        ParseResultType m_type;
+        TokenStream m_remainingTokens;
+    };
+
+    using Result = BasicResult<void>;
+    using ParserResult = BasicResult<ParseResultType>;
+    using InternalParseResult = BasicResult<ParseState>;
+
+    struct HelpColumns {
+        std::string left;
+        std::string right;
+    };
+
+    template<typename T>
+    inline auto convertInto( std::string const &source, T& target ) -> ParserResult {
+        std::stringstream ss;
+        ss << source;
+        ss >> target;
+        if( ss.fail() )
+            return ParserResult::runtimeError( "Unable to convert '" + source + "' to destination type" );
+        else
+            return ParserResult::ok( ParseResultType::Matched );
+    }
+    inline auto convertInto( std::string const &source, std::string& target ) -> ParserResult {
+        target = source;
+        return ParserResult::ok( ParseResultType::Matched );
+    }
+    inline auto convertInto( std::string const &source, bool &target ) -> ParserResult {
+        std::string srcLC = source;
+        std::transform( srcLC.begin(), srcLC.end(), srcLC.begin(), []( char c ) { return static_cast<char>( ::tolower(c) ); } );
+        if (srcLC == "y" || srcLC == "1" || srcLC == "true" || srcLC == "yes" || srcLC == "on")
+            target = true;
+        else if (srcLC == "n" || srcLC == "0" || srcLC == "false" || srcLC == "no" || srcLC == "off")
+            target = false;
+        else
+            return ParserResult::runtimeError( "Expected a boolean value but did not recognise: '" + source + "'" );
+        return ParserResult::ok( ParseResultType::Matched );
+    }
+#ifdef CLARA_CONFIG_OPTIONAL_TYPE
+    template<typename T>
+    inline auto convertInto( std::string const &source, CLARA_CONFIG_OPTIONAL_TYPE<T>& target ) -> ParserResult {
+        T temp;
+        auto result = convertInto( source, temp );
+        if( result )
+            target = std::move(temp);
+        return result;
+    }
+#endif // CLARA_CONFIG_OPTIONAL_TYPE
+
+    struct NonCopyable {
+        NonCopyable() = default;
+        NonCopyable( NonCopyable const & ) = delete;
+        NonCopyable( NonCopyable && ) = delete;
+        NonCopyable &operator=( NonCopyable const & ) = delete;
+        NonCopyable &operator=( NonCopyable && ) = delete;
+    };
+
+    struct BoundRef : NonCopyable {
+        virtual ~BoundRef() = default;
+        virtual auto isContainer() const -> bool { return false; }
+        virtual auto isFlag() const -> bool { return false; }
+    };
+    struct BoundValueRefBase : BoundRef {
+        virtual auto setValue( std::string const &arg ) -> ParserResult = 0;
+    };
+    struct BoundFlagRefBase : BoundRef {
+        virtual auto setFlag( bool flag ) -> ParserResult = 0;
+        virtual auto isFlag() const -> bool { return true; }
+    };
+
+    template<typename T>
+    struct BoundValueRef : BoundValueRefBase {
+        T &m_ref;
+
+        explicit BoundValueRef( T &ref ) : m_ref( ref ) {}
+
+        auto setValue( std::string const &arg ) -> ParserResult override {
+            return convertInto( arg, m_ref );
+        }
+    };
+
+    template<typename T>
+    struct BoundValueRef<std::vector<T>> : BoundValueRefBase {
+        std::vector<T> &m_ref;
+
+        explicit BoundValueRef( std::vector<T> &ref ) : m_ref( ref ) {}
+
+        auto isContainer() const -> bool override { return true; }
+
+        auto setValue( std::string const &arg ) -> ParserResult override {
+            T temp;
+            auto result = convertInto( arg, temp );
+            if( result )
+                m_ref.push_back( temp );
+            return result;
+        }
+    };
+
+    struct BoundFlagRef : BoundFlagRefBase {
+        bool &m_ref;
+
+        explicit BoundFlagRef( bool &ref ) : m_ref( ref ) {}
+
+        auto setFlag( bool flag ) -> ParserResult override {
+            m_ref = flag;
+            return ParserResult::ok( ParseResultType::Matched );
+        }
+    };
+
+    template<typename ReturnType>
+    struct LambdaInvoker {
+        static_assert( std::is_same<ReturnType, ParserResult>::value, "Lambda must return void or clara::ParserResult" );
+
+        template<typename L, typename ArgType>
+        static auto invoke( L const &lambda, ArgType const &arg ) -> ParserResult {
+            return lambda( arg );
+        }
+    };
+
+    template<>
+    struct LambdaInvoker<void> {
+        template<typename L, typename ArgType>
+        static auto invoke( L const &lambda, ArgType const &arg ) -> ParserResult {
+            lambda( arg );
+            return ParserResult::ok( ParseResultType::Matched );
+        }
+    };
+
+    template<typename ArgType, typename L>
+    inline auto invokeLambda( L const &lambda, std::string const &arg ) -> ParserResult {
+        ArgType temp{};
+        auto result = convertInto( arg, temp );
+        return !result
+           ? result
+           : LambdaInvoker<typename UnaryLambdaTraits<L>::ReturnType>::invoke( lambda, temp );
+    }
+
+    template<typename L>
+    struct BoundLambda : BoundValueRefBase {
+        L m_lambda;
+
+        static_assert( UnaryLambdaTraits<L>::isValid, "Supplied lambda must take exactly one argument" );
+        explicit BoundLambda( L const &lambda ) : m_lambda( lambda ) {}
+
+        auto setValue( std::string const &arg ) -> ParserResult override {
+            return invokeLambda<typename UnaryLambdaTraits<L>::ArgType>( m_lambda, arg );
+        }
+    };
+
+    template<typename L>
+    struct BoundFlagLambda : BoundFlagRefBase {
+        L m_lambda;
+
+        static_assert( UnaryLambdaTraits<L>::isValid, "Supplied lambda must take exactly one argument" );
+        static_assert( std::is_same<typename UnaryLambdaTraits<L>::ArgType, bool>::value, "flags must be boolean" );
+
+        explicit BoundFlagLambda( L const &lambda ) : m_lambda( lambda ) {}
+
+        auto setFlag( bool flag ) -> ParserResult override {
+            return LambdaInvoker<typename UnaryLambdaTraits<L>::ReturnType>::invoke( m_lambda, flag );
+        }
+    };
+
+    enum class Optionality { Optional, Required };
+
+    struct Parser;
+
+    class ParserBase {
+    public:
+        virtual ~ParserBase() = default;
+        virtual auto validate() const -> Result { return Result::ok(); }
+        virtual auto parse( std::string const& exeName, TokenStream const &tokens) const -> InternalParseResult  = 0;
+        virtual auto cardinality() const -> size_t { return 1; }
+
+        auto parse( Args const &args ) const -> InternalParseResult {
+            return parse( args.exeName(), TokenStream( args ) );
+        }
+    };
+
+    template<typename DerivedT>
+    class ComposableParserImpl : public ParserBase {
+    public:
+        template<typename T>
+        auto operator|( T const &other ) const -> Parser;
+
+		template<typename T>
+        auto operator+( T const &other ) const -> Parser;
+    };
+
+    // Common code and state for Args and Opts
+    template<typename DerivedT>
+    class ParserRefImpl : public ComposableParserImpl<DerivedT> {
+    protected:
+        Optionality m_optionality = Optionality::Optional;
+        std::shared_ptr<BoundRef> m_ref;
+        std::string m_hint;
+        std::string m_description;
+
+        explicit ParserRefImpl( std::shared_ptr<BoundRef> const &ref ) : m_ref( ref ) {}
+
+    public:
+        template<typename T>
+        ParserRefImpl( T &ref, std::string const &hint )
+        :   m_ref( std::make_shared<BoundValueRef<T>>( ref ) ),
+            m_hint( hint )
+        {}
+
+        template<typename LambdaT>
+        ParserRefImpl( LambdaT const &ref, std::string const &hint )
+        :   m_ref( std::make_shared<BoundLambda<LambdaT>>( ref ) ),
+            m_hint(hint)
+        {}
+
+        auto operator()( std::string const &description ) -> DerivedT & {
+            m_description = description;
+            return static_cast<DerivedT &>( *this );
+        }
+
+        auto optional() -> DerivedT & {
+            m_optionality = Optionality::Optional;
+            return static_cast<DerivedT &>( *this );
+        };
+
+        auto required() -> DerivedT & {
+            m_optionality = Optionality::Required;
+            return static_cast<DerivedT &>( *this );
+        };
+
+        auto isOptional() const -> bool {
+            return m_optionality == Optionality::Optional;
+        }
+
+        auto cardinality() const -> size_t override {
+            if( m_ref->isContainer() )
+                return 0;
+            else
+                return 1;
+        }
+
+        auto hint() const -> std::string { return m_hint; }
+    };
+
+    class ExeName : public ComposableParserImpl<ExeName> {
+        std::shared_ptr<std::string> m_name;
+        std::shared_ptr<BoundValueRefBase> m_ref;
+
+        template<typename LambdaT>
+        static auto makeRef(LambdaT const &lambda) -> std::shared_ptr<BoundValueRefBase> {
+            return std::make_shared<BoundLambda<LambdaT>>( lambda) ;
+        }
+
+    public:
+        ExeName() : m_name( std::make_shared<std::string>( "<executable>" ) ) {}
+
+        explicit ExeName( std::string &ref ) : ExeName() {
+            m_ref = std::make_shared<BoundValueRef<std::string>>( ref );
+        }
+
+        template<typename LambdaT>
+        explicit ExeName( LambdaT const& lambda ) : ExeName() {
+            m_ref = std::make_shared<BoundLambda<LambdaT>>( lambda );
+        }
+
+        // The exe name is not parsed out of the normal tokens, but is handled specially
+        auto parse( std::string const&, TokenStream const &tokens ) const -> InternalParseResult override {
+            return InternalParseResult::ok( ParseState( ParseResultType::NoMatch, tokens ) );
+        }
+
+        auto name() const -> std::string { return *m_name; }
+        auto set( std::string const& newName ) -> ParserResult {
+
+            auto lastSlash = newName.find_last_of( "\\/" );
+            auto filename = ( lastSlash == std::string::npos )
+                    ? newName
+                    : newName.substr( lastSlash+1 );
+
+            *m_name = filename;
+            if( m_ref )
+                return m_ref->setValue( filename );
+            else
+                return ParserResult::ok( ParseResultType::Matched );
+        }
+    };
+
+    class Arg : public ParserRefImpl<Arg> {
+    public:
+        using ParserRefImpl::ParserRefImpl;
+
+        auto parse( std::string const &, TokenStream const &tokens ) const -> InternalParseResult override {
+            auto validationResult = validate();
+            if( !validationResult )
+                return InternalParseResult( validationResult );
+
+            auto remainingTokens = tokens;
+            auto const &token = *remainingTokens;
+            if( token.type != TokenType::Argument )
+                return InternalParseResult::ok( ParseState( ParseResultType::NoMatch, remainingTokens ) );
+
+            assert( !m_ref->isFlag() );
+            auto valueRef = static_cast<detail::BoundValueRefBase*>( m_ref.get() );
+
+            auto result = valueRef->setValue( remainingTokens->token );
+            if( !result )
+                return InternalParseResult( result );
+            else
+                return InternalParseResult::ok( ParseState( ParseResultType::Matched, ++remainingTokens ) );
+        }
+    };
+
+    inline auto normaliseOpt( std::string const &optName ) -> std::string {
+#ifdef CATCH_PLATFORM_WINDOWS
+        if( optName[0] == '/' )
+            return "-" + optName.substr( 1 );
+        else
+#endif
+            return optName;
+    }
+
+    class Opt : public ParserRefImpl<Opt> {
+    protected:
+        std::vector<std::string> m_optNames;
+
+    public:
+        template<typename LambdaT>
+        explicit Opt( LambdaT const &ref ) : ParserRefImpl( std::make_shared<BoundFlagLambda<LambdaT>>( ref ) ) {}
+
+        explicit Opt( bool &ref ) : ParserRefImpl( std::make_shared<BoundFlagRef>( ref ) ) {}
+
+        template<typename LambdaT>
+        Opt( LambdaT const &ref, std::string const &hint ) : ParserRefImpl( ref, hint ) {}
+
+        template<typename T>
+        Opt( T &ref, std::string const &hint ) : ParserRefImpl( ref, hint ) {}
+
+        auto operator[]( std::string const &optName ) -> Opt & {
+            m_optNames.push_back( optName );
+            return *this;
+        }
+
+        auto getHelpColumns() const -> std::vector<HelpColumns> {
+            std::ostringstream oss;
+            bool first = true;
+            for( auto const &opt : m_optNames ) {
+                if (first)
+                    first = false;
+                else
+                    oss << ", ";
+                oss << opt;
+            }
+            if( !m_hint.empty() )
+                oss << " <" << m_hint << ">";
+            return { { oss.str(), m_description } };
+        }
+
+        auto isMatch( std::string const &optToken ) const -> bool {
+            auto normalisedToken = normaliseOpt( optToken );
+            for( auto const &name : m_optNames ) {
+                if( normaliseOpt( name ) == normalisedToken )
+                    return true;
+            }
+            return false;
+        }
+
+        using ParserBase::parse;
+
+        auto parse( std::string const&, TokenStream const &tokens ) const -> InternalParseResult override {
+            auto validationResult = validate();
+            if( !validationResult )
+                return InternalParseResult( validationResult );
+
+            auto remainingTokens = tokens;
+            if( remainingTokens && remainingTokens->type == TokenType::Option ) {
+                auto const &token = *remainingTokens;
+                if( isMatch(token.token ) ) {
+                    if( m_ref->isFlag() ) {
+                        auto flagRef = static_cast<detail::BoundFlagRefBase*>( m_ref.get() );
+                        auto result = flagRef->setFlag( true );
+                        if( !result )
+                            return InternalParseResult( result );
+                        if( result.value() == ParseResultType::ShortCircuitAll )
+                            return InternalParseResult::ok( ParseState( result.value(), remainingTokens ) );
+                    } else {
+                        auto valueRef = static_cast<detail::BoundValueRefBase*>( m_ref.get() );
+                        ++remainingTokens;
+                        if( !remainingTokens )
+                            return InternalParseResult::runtimeError( "Expected argument following " + token.token );
+                        auto const &argToken = *remainingTokens;
+                        if( argToken.type != TokenType::Argument )
+                            return InternalParseResult::runtimeError( "Expected argument following " + token.token );
+                        auto result = valueRef->setValue( argToken.token );
+                        if( !result )
+                            return InternalParseResult( result );
+                        if( result.value() == ParseResultType::ShortCircuitAll )
+                            return InternalParseResult::ok( ParseState( result.value(), remainingTokens ) );
+                    }
+                    return InternalParseResult::ok( ParseState( ParseResultType::Matched, ++remainingTokens ) );
+                }
+            }
+            return InternalParseResult::ok( ParseState( ParseResultType::NoMatch, remainingTokens ) );
+        }
+
+        auto validate() const -> Result override {
+            if( m_optNames.empty() )
+                return Result::logicError( "No options supplied to Opt" );
+            for( auto const &name : m_optNames ) {
+                if( name.empty() )
+                    return Result::logicError( "Option name cannot be empty" );
+#ifdef CATCH_PLATFORM_WINDOWS
+                if( name[0] != '-' && name[0] != '/' )
+                    return Result::logicError( "Option name must begin with '-' or '/'" );
+#else
+                if( name[0] != '-' )
+                    return Result::logicError( "Option name must begin with '-'" );
+#endif
+            }
+            return ParserRefImpl::validate();
+        }
+    };
+
+    struct Help : Opt {
+        Help( bool &showHelpFlag )
+        :   Opt([&]( bool flag ) {
+                showHelpFlag = flag;
+                return ParserResult::ok( ParseResultType::ShortCircuitAll );
+            })
+        {
+            static_cast<Opt &>( *this )
+                    ("display usage information")
+                    ["-?"]["-h"]["--help"]
+                    .optional();
+        }
+    };
+
+    struct Parser : ParserBase {
+
+        mutable ExeName m_exeName;
+        std::vector<Opt> m_options;
+        std::vector<Arg> m_args;
+
+        auto operator|=( ExeName const &exeName ) -> Parser & {
+            m_exeName = exeName;
+            return *this;
+        }
+
+        auto operator|=( Arg const &arg ) -> Parser & {
+            m_args.push_back(arg);
+            return *this;
+        }
+
+        auto operator|=( Opt const &opt ) -> Parser & {
+            m_options.push_back(opt);
+            return *this;
+        }
+
+        auto operator|=( Parser const &other ) -> Parser & {
+            m_options.insert(m_options.end(), other.m_options.begin(), other.m_options.end());
+            m_args.insert(m_args.end(), other.m_args.begin(), other.m_args.end());
+            return *this;
+        }
+
+        template<typename T>
+        auto operator|( T const &other ) const -> Parser {
+            return Parser( *this ) |= other;
+        }
+
+        // Forward deprecated interface with '+' instead of '|'
+        template<typename T>
+        auto operator+=( T const &other ) -> Parser & { return operator|=( other ); }
+        template<typename T>
+        auto operator+( T const &other ) const -> Parser { return operator|( other ); }
+
+        auto getHelpColumns() const -> std::vector<HelpColumns> {
+            std::vector<HelpColumns> cols;
+            for (auto const &o : m_options) {
+                auto childCols = o.getHelpColumns();
+                cols.insert( cols.end(), childCols.begin(), childCols.end() );
+            }
+            return cols;
+        }
+
+        void writeToStream( std::ostream &os ) const {
+            if (!m_exeName.name().empty()) {
+                os << "usage:\n" << "  " << m_exeName.name() << " ";
+                bool required = true, first = true;
+                for( auto const &arg : m_args ) {
+                    if (first)
+                        first = false;
+                    else
+                        os << " ";
+                    if( arg.isOptional() && required ) {
+                        os << "[";
+                        required = false;
+                    }
+                    os << "<" << arg.hint() << ">";
+                    if( arg.cardinality() == 0 )
+                        os << " ... ";
+                }
+                if( !required )
+                    os << "]";
+                if( !m_options.empty() )
+                    os << " options";
+                os << "\n\nwhere options are:" << std::endl;
+            }
+
+            auto rows = getHelpColumns();
+            size_t consoleWidth = CATCH_CLARA_CONFIG_CONSOLE_WIDTH;
+            size_t optWidth = 0;
+            for( auto const &cols : rows )
+                optWidth = (std::max)(optWidth, cols.left.size() + 2);
+
+            optWidth = (std::min)(optWidth, consoleWidth/2);
+
+            for( auto const &cols : rows ) {
+                auto row =
+                        TextFlow::Column( cols.left ).width( optWidth ).indent( 2 ) +
+                        TextFlow::Spacer(4) +
+                        TextFlow::Column( cols.right ).width( consoleWidth - 7 - optWidth );
+                os << row << std::endl;
+            }
+        }
+
+        friend auto operator<<( std::ostream &os, Parser const &parser ) -> std::ostream& {
+            parser.writeToStream( os );
+            return os;
+        }
+
+        auto validate() const -> Result override {
+            for( auto const &opt : m_options ) {
+                auto result = opt.validate();
+                if( !result )
+                    return result;
+            }
+            for( auto const &arg : m_args ) {
+                auto result = arg.validate();
+                if( !result )
+                    return result;
+            }
+            return Result::ok();
+        }
+
+        using ParserBase::parse;
+
+        auto parse( std::string const& exeName, TokenStream const &tokens ) const -> InternalParseResult override {
+
+            struct ParserInfo {
+                ParserBase const* parser = nullptr;
+                size_t count = 0;
+            };
+            const size_t totalParsers = m_options.size() + m_args.size();
+            assert( totalParsers < 512 );
+            // ParserInfo parseInfos[totalParsers]; // <-- this is what we really want to do
+            ParserInfo parseInfos[512];
+
+            {
+                size_t i = 0;
+                for (auto const &opt : m_options) parseInfos[i++].parser = &opt;
+                for (auto const &arg : m_args) parseInfos[i++].parser = &arg;
+            }
+
+            m_exeName.set( exeName );
+
+            auto result = InternalParseResult::ok( ParseState( ParseResultType::NoMatch, tokens ) );
+            while( result.value().remainingTokens() ) {
+                bool tokenParsed = false;
+
+                for( size_t i = 0; i < totalParsers; ++i ) {
+                    auto&  parseInfo = parseInfos[i];
+                    if( parseInfo.parser->cardinality() == 0 || parseInfo.count < parseInfo.parser->cardinality() ) {
+                        result = parseInfo.parser->parse(exeName, result.value().remainingTokens());
+                        if (!result)
+                            return result;
+                        if (result.value().type() != ParseResultType::NoMatch) {
+                            tokenParsed = true;
+                            ++parseInfo.count;
+                            break;
+                        }
+                    }
+                }
+
+                if( result.value().type() == ParseResultType::ShortCircuitAll )
+                    return result;
+                if( !tokenParsed )
+                    return InternalParseResult::runtimeError( "Unrecognised token: " + result.value().remainingTokens()->token );
+            }
+            // !TBD Check missing required options
+            return result;
+        }
+    };
+
+    template<typename DerivedT>
+    template<typename T>
+    auto ComposableParserImpl<DerivedT>::operator|( T const &other ) const -> Parser {
+        return Parser() | static_cast<DerivedT const &>( *this ) | other;
+    }
+} // namespace detail
+
+// A Combined parser
+using detail::Parser;
+
+// A parser for options
+using detail::Opt;
+
+// A parser for arguments
+using detail::Arg;
+
+// Wrapper for argc, argv from main()
+using detail::Args;
+
+// Specifies the name of the executable
+using detail::ExeName;
+
+// Convenience wrapper for option parser that specifies the help option
+using detail::Help;
+
+// enum of result types from a parse
+using detail::ParseResultType;
+
+// Result type for parser operation
+using detail::ParserResult;
+
+}} // namespace Catch::clara
+
+// end clara.hpp
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// Restore Clara's value for console width, if present
+#ifdef CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH
+#define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH
+#undef CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH
+#endif
+
+// end catch_clara.h
+namespace Catch {
+
+    clara::Parser makeCommandLineParser( ConfigData& config );
+
+} // end namespace Catch
+
+// end catch_commandline.h
+#include <fstream>
+#include <ctime>
+
+namespace Catch {
+
+    clara::Parser makeCommandLineParser( ConfigData& config ) {
+
+        using namespace clara;
+
+        auto const setWarning = [&]( std::string const& warning ) {
+                auto warningSet = [&]() {
+                    if( warning == "NoAssertions" )
+                        return WarnAbout::NoAssertions;
+
+                    if ( warning == "NoTests" )
+                        return WarnAbout::NoTests;
+
+                    return WarnAbout::Nothing;
+                }();
+
+                if (warningSet == WarnAbout::Nothing)
+                    return ParserResult::runtimeError( "Unrecognised warning: '" + warning + "'" );
+                config.warnings = static_cast<WarnAbout::What>( config.warnings | warningSet );
+                return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const loadTestNamesFromFile = [&]( std::string const& filename ) {
+                std::ifstream f( filename.c_str() );
+                if( !f.is_open() )
+                    return ParserResult::runtimeError( "Unable to load input file: '" + filename + "'" );
+
+                std::string line;
+                while( std::getline( f, line ) ) {
+                    line = trim(line);
+                    if( !line.empty() && !startsWith( line, '#' ) ) {
+                        if( !startsWith( line, '"' ) )
+                            line = '"' + line + '"';
+                        config.testsOrTags.push_back( line + ',' );
+                    }
+                }
+                return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const setTestOrder = [&]( std::string const& order ) {
+                if( startsWith( "declared", order ) )
+                    config.runOrder = RunTests::InDeclarationOrder;
+                else if( startsWith( "lexical", order ) )
+                    config.runOrder = RunTests::InLexicographicalOrder;
+                else if( startsWith( "random", order ) )
+                    config.runOrder = RunTests::InRandomOrder;
+                else
+                    return clara::ParserResult::runtimeError( "Unrecognised ordering: '" + order + "'" );
+                return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const setRngSeed = [&]( std::string const& seed ) {
+                if( seed != "time" )
+                    return clara::detail::convertInto( seed, config.rngSeed );
+                config.rngSeed = static_cast<unsigned int>( std::time(nullptr) );
+                return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const setColourUsage = [&]( std::string const& useColour ) {
+                    auto mode = toLower( useColour );
+
+                    if( mode == "yes" )
+                        config.useColour = UseColour::Yes;
+                    else if( mode == "no" )
+                        config.useColour = UseColour::No;
+                    else if( mode == "auto" )
+                        config.useColour = UseColour::Auto;
+                    else
+                        return ParserResult::runtimeError( "colour mode must be one of: auto, yes or no. '" + useColour + "' not recognised" );
+                return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const setWaitForKeypress = [&]( std::string const& keypress ) {
+                auto keypressLc = toLower( keypress );
+                if( keypressLc == "start" )
+                    config.waitForKeypress = WaitForKeypress::BeforeStart;
+                else if( keypressLc == "exit" )
+                    config.waitForKeypress = WaitForKeypress::BeforeExit;
+                else if( keypressLc == "both" )
+                    config.waitForKeypress = WaitForKeypress::BeforeStartAndExit;
+                else
+                    return ParserResult::runtimeError( "keypress argument must be one of: start, exit or both. '" + keypress + "' not recognised" );
+            return ParserResult::ok( ParseResultType::Matched );
+            };
+        auto const setVerbosity = [&]( std::string const& verbosity ) {
+            auto lcVerbosity = toLower( verbosity );
+            if( lcVerbosity == "quiet" )
+                config.verbosity = Verbosity::Quiet;
+            else if( lcVerbosity == "normal" )
+                config.verbosity = Verbosity::Normal;
+            else if( lcVerbosity == "high" )
+                config.verbosity = Verbosity::High;
+            else
+                return ParserResult::runtimeError( "Unrecognised verbosity, '" + verbosity + "'" );
+            return ParserResult::ok( ParseResultType::Matched );
+        };
+        auto const setReporter = [&]( std::string const& reporter ) {
+            IReporterRegistry::FactoryMap const& factories = getRegistryHub().getReporterRegistry().getFactories();
+
+            auto lcReporter = toLower( reporter );
+            auto result = factories.find( lcReporter );
+
+            if( factories.end() != result )
+                config.reporterName = lcReporter;
+            else
+                return ParserResult::runtimeError( "Unrecognized reporter, '" + reporter + "'. Check available with --list-reporters" );
+            return ParserResult::ok( ParseResultType::Matched );
+        };
+
+        auto cli
+            = ExeName( config.processName )
+            | Help( config.showHelp )
+            | Opt( config.listTests )
+                ["-l"]["--list-tests"]
+                ( "list all/matching test cases" )
+            | Opt( config.listTags )
+                ["-t"]["--list-tags"]
+                ( "list all/matching tags" )
+            | Opt( config.showSuccessfulTests )
+                ["-s"]["--success"]
+                ( "include successful tests in output" )
+            | Opt( config.shouldDebugBreak )
+                ["-b"]["--break"]
+                ( "break into debugger on failure" )
+            | Opt( config.noThrow )
+                ["-e"]["--nothrow"]
+                ( "skip exception tests" )
+            | Opt( config.showInvisibles )
+                ["-i"]["--invisibles"]
+                ( "show invisibles (tabs, newlines)" )
+            | Opt( config.outputFilename, "filename" )
+                ["-o"]["--out"]
+                ( "output filename" )
+            | Opt( setReporter, "name" )
+                ["-r"]["--reporter"]
+                ( "reporter to use (defaults to console)" )
+            | Opt( config.name, "name" )
+                ["-n"]["--name"]
+                ( "suite name" )
+            | Opt( [&]( bool ){ config.abortAfter = 1; } )
+                ["-a"]["--abort"]
+                ( "abort at first failure" )
+            | Opt( [&]( int x ){ config.abortAfter = x; }, "no. failures" )
+                ["-x"]["--abortx"]
+                ( "abort after x failures" )
+            | Opt( setWarning, "warning name" )
+                ["-w"]["--warn"]
+                ( "enable warnings" )
+            | Opt( [&]( bool flag ) { config.showDurations = flag ? ShowDurations::Always : ShowDurations::Never; }, "yes|no" )
+                ["-d"]["--durations"]
+                ( "show test durations" )
+            | Opt( loadTestNamesFromFile, "filename" )
+                ["-f"]["--input-file"]
+                ( "load test names to run from a file" )
+            | Opt( config.filenamesAsTags )
+                ["-#"]["--filenames-as-tags"]
+                ( "adds a tag for the filename" )
+            | Opt( config.sectionsToRun, "section name" )
+                ["-c"]["--section"]
+                ( "specify section to run" )
+            | Opt( setVerbosity, "quiet|normal|high" )
+                ["-v"]["--verbosity"]
+                ( "set output verbosity" )
+            | Opt( config.listTestNamesOnly )
+                ["--list-test-names-only"]
+                ( "list all/matching test cases names only" )
+            | Opt( config.listReporters )
+                ["--list-reporters"]
+                ( "list all reporters" )
+            | Opt( setTestOrder, "decl|lex|rand" )
+                ["--order"]
+                ( "test case order (defaults to decl)" )
+            | Opt( setRngSeed, "'time'|number" )
+                ["--rng-seed"]
+                ( "set a specific seed for random numbers" )
+            | Opt( setColourUsage, "yes|no" )
+                ["--use-colour"]
+                ( "should output be colourised" )
+            | Opt( config.libIdentify )
+                ["--libidentify"]
+                ( "report name and version according to libidentify standard" )
+            | Opt( setWaitForKeypress, "start|exit|both" )
+                ["--wait-for-keypress"]
+                ( "waits for a keypress before exiting" )
+            | Opt( config.benchmarkResolutionMultiple, "multiplier" )
+                ["--benchmark-resolution-multiple"]
+                ( "multiple of clock resolution to run benchmarks" )
+
+            | Arg( config.testsOrTags, "test name|pattern|tags" )
+                ( "which test or tests to use" );
+
+        return cli;
+    }
+
+} // end namespace Catch
+// end catch_commandline.cpp
+// start catch_common.cpp
+
+#include <cstring>
+#include <ostream>
+
+namespace Catch {
+
+    bool SourceLineInfo::empty() const noexcept {
+        return file[0] == '\0';
+    }
+    bool SourceLineInfo::operator == ( SourceLineInfo const& other ) const noexcept {
+        return line == other.line && (file == other.file || std::strcmp(file, other.file) == 0);
+    }
+    bool SourceLineInfo::operator < ( SourceLineInfo const& other ) const noexcept {
+        // We can assume that the same file will usually have the same pointer.
+        // Thus, if the pointers are the same, there is no point in calling the strcmp
+        return line < other.line || ( line == other.line && file != other.file && (std::strcmp(file, other.file) < 0));
+    }
+
+    std::ostream& operator << ( std::ostream& os, SourceLineInfo const& info ) {
+#ifndef __GNUG__
+        os << info.file << '(' << info.line << ')';
+#else
+        os << info.file << ':' << info.line;
+#endif
+        return os;
+    }
+
+    std::string StreamEndStop::operator+() const {
+        return std::string();
+    }
+
+    NonCopyable::NonCopyable() = default;
+    NonCopyable::~NonCopyable() = default;
+
+}
+// end catch_common.cpp
+// start catch_config.cpp
+
+namespace Catch {
+
+    Config::Config( ConfigData const& data )
+    :   m_data( data ),
+        m_stream( openStream() )
+    {
+        TestSpecParser parser(ITagAliasRegistry::get());
+        if (data.testsOrTags.empty()) {
+            parser.parse("~[.]"); // All not hidden tests
+        }
+        else {
+            m_hasTestFilters = true;
+            for( auto const& testOrTags : data.testsOrTags )
+                parser.parse( testOrTags );
+        }
+        m_testSpec = parser.testSpec();
+    }
+
+    std::string const& Config::getFilename() const {
+        return m_data.outputFilename ;
+    }
+
+    bool Config::listTests() const          { return m_data.listTests; }
+    bool Config::listTestNamesOnly() const  { return m_data.listTestNamesOnly; }
+    bool Config::listTags() const           { return m_data.listTags; }
+    bool Config::listReporters() const      { return m_data.listReporters; }
+
+    std::string Config::getProcessName() const { return m_data.processName; }
+    std::string const& Config::getReporterName() const { return m_data.reporterName; }
+
+    std::vector<std::string> const& Config::getTestsOrTags() const { return m_data.testsOrTags; }
+    std::vector<std::string> const& Config::getSectionsToRun() const { return m_data.sectionsToRun; }
+
+    TestSpec const& Config::testSpec() const { return m_testSpec; }
+    bool Config::hasTestFilters() const { return m_hasTestFilters; }
+
+    bool Config::showHelp() const { return m_data.showHelp; }
+
+    // IConfig interface
+    bool Config::allowThrows() const                   { return !m_data.noThrow; }
+    std::ostream& Config::stream() const               { return m_stream->stream(); }
+    std::string Config::name() const                   { return m_data.name.empty() ? m_data.processName : m_data.name; }
+    bool Config::includeSuccessfulResults() const      { return m_data.showSuccessfulTests; }
+    bool Config::warnAboutMissingAssertions() const    { return !!(m_data.warnings & WarnAbout::NoAssertions); }
+    bool Config::warnAboutNoTests() const              { return !!(m_data.warnings & WarnAbout::NoTests); }
+    ShowDurations::OrNot Config::showDurations() const { return m_data.showDurations; }
+    RunTests::InWhatOrder Config::runOrder() const     { return m_data.runOrder; }
+    unsigned int Config::rngSeed() const               { return m_data.rngSeed; }
+    int Config::benchmarkResolutionMultiple() const    { return m_data.benchmarkResolutionMultiple; }
+    UseColour::YesOrNo Config::useColour() const       { return m_data.useColour; }
+    bool Config::shouldDebugBreak() const              { return m_data.shouldDebugBreak; }
+    int Config::abortAfter() const                     { return m_data.abortAfter; }
+    bool Config::showInvisibles() const                { return m_data.showInvisibles; }
+    Verbosity Config::verbosity() const                { return m_data.verbosity; }
+
+    IStream const* Config::openStream() {
+        return Catch::makeStream(m_data.outputFilename);
+    }
+
+} // end namespace Catch
+// end catch_config.cpp
+// start catch_console_colour.cpp
+
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wexit-time-destructors"
+#endif
+
+// start catch_errno_guard.h
+
+namespace Catch {
+
+    class ErrnoGuard {
+    public:
+        ErrnoGuard();
+        ~ErrnoGuard();
+    private:
+        int m_oldErrno;
+    };
+
+}
+
+// end catch_errno_guard.h
+#include <sstream>
+
+namespace Catch {
+    namespace {
+
+        struct IColourImpl {
+            virtual ~IColourImpl() = default;
+            virtual void use( Colour::Code _colourCode ) = 0;
+        };
+
+        struct NoColourImpl : IColourImpl {
+            void use( Colour::Code ) {}
+
+            static IColourImpl* instance() {
+                static NoColourImpl s_instance;
+                return &s_instance;
+            }
+        };
+
+    } // anon namespace
+} // namespace Catch
+
+#if !defined( CATCH_CONFIG_COLOUR_NONE ) && !defined( CATCH_CONFIG_COLOUR_WINDOWS ) && !defined( CATCH_CONFIG_COLOUR_ANSI )
+#   ifdef CATCH_PLATFORM_WINDOWS
+#       define CATCH_CONFIG_COLOUR_WINDOWS
+#   else
+#       define CATCH_CONFIG_COLOUR_ANSI
+#   endif
+#endif
+
+#if defined ( CATCH_CONFIG_COLOUR_WINDOWS ) /////////////////////////////////////////
+
+namespace Catch {
+namespace {
+
+    class Win32ColourImpl : public IColourImpl {
+    public:
+        Win32ColourImpl() : stdoutHandle( GetStdHandle(STD_OUTPUT_HANDLE) )
+        {
+            CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
+            GetConsoleScreenBufferInfo( stdoutHandle, &csbiInfo );
+            originalForegroundAttributes = csbiInfo.wAttributes & ~( BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_BLUE | BACKGROUND_INTENSITY );
+            originalBackgroundAttributes = csbiInfo.wAttributes & ~( FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_INTENSITY );
+        }
+
+        virtual void use( Colour::Code _colourCode ) override {
+            switch( _colourCode ) {
+                case Colour::None:      return setTextAttribute( originalForegroundAttributes );
+                case Colour::White:     return setTextAttribute( FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE );
+                case Colour::Red:       return setTextAttribute( FOREGROUND_RED );
+                case Colour::Green:     return setTextAttribute( FOREGROUND_GREEN );
+                case Colour::Blue:      return setTextAttribute( FOREGROUND_BLUE );
+                case Colour::Cyan:      return setTextAttribute( FOREGROUND_BLUE | FOREGROUND_GREEN );
+                case Colour::Yellow:    return setTextAttribute( FOREGROUND_RED | FOREGROUND_GREEN );
+                case Colour::Grey:      return setTextAttribute( 0 );
+
+                case Colour::LightGrey:     return setTextAttribute( FOREGROUND_INTENSITY );
+                case Colour::BrightRed:     return setTextAttribute( FOREGROUND_INTENSITY | FOREGROUND_RED );
+                case Colour::BrightGreen:   return setTextAttribute( FOREGROUND_INTENSITY | FOREGROUND_GREEN );
+                case Colour::BrightWhite:   return setTextAttribute( FOREGROUND_INTENSITY | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE );
+                case Colour::BrightYellow:  return setTextAttribute( FOREGROUND_INTENSITY | FOREGROUND_RED | FOREGROUND_GREEN );
+
+                case Colour::Bright: CATCH_INTERNAL_ERROR( "not a colour" );
+
+                default:
+                    CATCH_ERROR( "Unknown colour requested" );
+            }
+        }
+
+    private:
+        void setTextAttribute( WORD _textAttribute ) {
+            SetConsoleTextAttribute( stdoutHandle, _textAttribute | originalBackgroundAttributes );
+        }
+        HANDLE stdoutHandle;
+        WORD originalForegroundAttributes;
+        WORD originalBackgroundAttributes;
+    };
+
+    IColourImpl* platformColourInstance() {
+        static Win32ColourImpl s_instance;
+
+        IConfigPtr config = getCurrentContext().getConfig();
+        UseColour::YesOrNo colourMode = config
+            ? config->useColour()
+            : UseColour::Auto;
+        if( colourMode == UseColour::Auto )
+            colourMode = UseColour::Yes;
+        return colourMode == UseColour::Yes
+            ? &s_instance
+            : NoColourImpl::instance();
+    }
+
+} // end anon namespace
+} // end namespace Catch
+
+#elif defined( CATCH_CONFIG_COLOUR_ANSI ) //////////////////////////////////////
+
+#include <unistd.h>
+
+namespace Catch {
+namespace {
+
+    // use POSIX/ ANSI console terminal codes
+    // Thanks to Adam Strzelecki for original contribution
+    // (http://github.com/nanoant)
+    // https://github.com/philsquared/Catch/pull/131
+    class PosixColourImpl : public IColourImpl {
+    public:
+        virtual void use( Colour::Code _colourCode ) override {
+            switch( _colourCode ) {
+                case Colour::None:
+                case Colour::White:     return setColour( "[0m" );
+                case Colour::Red:       return setColour( "[0;31m" );
+                case Colour::Green:     return setColour( "[0;32m" );
+                case Colour::Blue:      return setColour( "[0;34m" );
+                case Colour::Cyan:      return setColour( "[0;36m" );
+                case Colour::Yellow:    return setColour( "[0;33m" );
+                case Colour::Grey:      return setColour( "[1;30m" );
+
+                case Colour::LightGrey:     return setColour( "[0;37m" );
+                case Colour::BrightRed:     return setColour( "[1;31m" );
+                case Colour::BrightGreen:   return setColour( "[1;32m" );
+                case Colour::BrightWhite:   return setColour( "[1;37m" );
+                case Colour::BrightYellow:  return setColour( "[1;33m" );
+
+                case Colour::Bright: CATCH_INTERNAL_ERROR( "not a colour" );
+                default: CATCH_INTERNAL_ERROR( "Unknown colour requested" );
+            }
+        }
+        static IColourImpl* instance() {
+            static PosixColourImpl s_instance;
+            return &s_instance;
+        }
+
+    private:
+        void setColour( const char* _escapeCode ) {
+            Catch::cout() << '\033' << _escapeCode;
+        }
+    };
+
+    bool useColourOnPlatform() {
+        return
+#ifdef CATCH_PLATFORM_MAC
+            !isDebuggerActive() &&
+#endif
+#if !(defined(__DJGPP__) && defined(__STRICT_ANSI__))
+            isatty(STDOUT_FILENO)
+#else
+            false
+#endif
+            ;
+    }
+    IColourImpl* platformColourInstance() {
+        ErrnoGuard guard;
+        IConfigPtr config = getCurrentContext().getConfig();
+        UseColour::YesOrNo colourMode = config
+            ? config->useColour()
+            : UseColour::Auto;
+        if( colourMode == UseColour::Auto )
+            colourMode = useColourOnPlatform()
+                ? UseColour::Yes
+                : UseColour::No;
+        return colourMode == UseColour::Yes
+            ? PosixColourImpl::instance()
+            : NoColourImpl::instance();
+    }
+
+} // end anon namespace
+} // end namespace Catch
+
+#else  // not Windows or ANSI ///////////////////////////////////////////////
+
+namespace Catch {
+
+    static IColourImpl* platformColourInstance() { return NoColourImpl::instance(); }
+
+} // end namespace Catch
+
+#endif // Windows/ ANSI/ None
+
+namespace Catch {
+
+    Colour::Colour( Code _colourCode ) { use( _colourCode ); }
+    Colour::Colour( Colour&& rhs ) noexcept {
+        m_moved = rhs.m_moved;
+        rhs.m_moved = true;
+    }
+    Colour& Colour::operator=( Colour&& rhs ) noexcept {
+        m_moved = rhs.m_moved;
+        rhs.m_moved  = true;
+        return *this;
+    }
+
+    Colour::~Colour(){ if( !m_moved ) use( None ); }
+
+    void Colour::use( Code _colourCode ) {
+        static IColourImpl* impl = platformColourInstance();
+        impl->use( _colourCode );
+    }
+
+    std::ostream& operator << ( std::ostream& os, Colour const& ) {
+        return os;
+    }
+
+} // end namespace Catch
+
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#endif
+
+// end catch_console_colour.cpp
+// start catch_context.cpp
+
+namespace Catch {
+
+    class Context : public IMutableContext, NonCopyable {
+
+    public: // IContext
+        virtual IResultCapture* getResultCapture() override {
+            return m_resultCapture;
+        }
+        virtual IRunner* getRunner() override {
+            return m_runner;
+        }
+
+        virtual IConfigPtr const& getConfig() const override {
+            return m_config;
+        }
+
+        virtual ~Context() override;
+
+    public: // IMutableContext
+        virtual void setResultCapture( IResultCapture* resultCapture ) override {
+            m_resultCapture = resultCapture;
+        }
+        virtual void setRunner( IRunner* runner ) override {
+            m_runner = runner;
+        }
+        virtual void setConfig( IConfigPtr const& config ) override {
+            m_config = config;
+        }
+
+        friend IMutableContext& getCurrentMutableContext();
+
+    private:
+        IConfigPtr m_config;
+        IRunner* m_runner = nullptr;
+        IResultCapture* m_resultCapture = nullptr;
+    };
+
+    IMutableContext *IMutableContext::currentContext = nullptr;
+
+    void IMutableContext::createContext()
+    {
+        currentContext = new Context();
+    }
+
+    void cleanUpContext() {
+        delete IMutableContext::currentContext;
+        IMutableContext::currentContext = nullptr;
+    }
+    IContext::~IContext() = default;
+    IMutableContext::~IMutableContext() = default;
+    Context::~Context() = default;
+}
+// end catch_context.cpp
+// start catch_debug_console.cpp
+
+// start catch_debug_console.h
+
+#include <string>
+
+namespace Catch {
+    void writeToDebugConsole( std::string const& text );
+}
+
+// end catch_debug_console.h
+#ifdef CATCH_PLATFORM_WINDOWS
+
+    namespace Catch {
+        void writeToDebugConsole( std::string const& text ) {
+            ::OutputDebugStringA( text.c_str() );
+        }
+    }
+
+#else
+
+    namespace Catch {
+        void writeToDebugConsole( std::string const& text ) {
+            // !TBD: Need a version for Mac/ XCode and other IDEs
+            Catch::cout() << text;
+        }
+    }
+
+#endif // Platform
+// end catch_debug_console.cpp
+// start catch_debugger.cpp
+
+#ifdef CATCH_PLATFORM_MAC
+
+#  include <assert.h>
+#  include <stdbool.h>
+#  include <sys/types.h>
+#  include <unistd.h>
+#  include <sys/sysctl.h>
+#  include <cstddef>
+#  include <ostream>
+
+namespace Catch {
+
+        // The following function is taken directly from the following technical note:
+        // http://developer.apple.com/library/mac/#qa/qa2004/qa1361.html
+
+        // Returns true if the current process is being debugged (either
+        // running under the debugger or has a debugger attached post facto).
+        bool isDebuggerActive(){
+
+            int                 mib[4];
+            struct kinfo_proc   info;
+            std::size_t         size;
+
+            // Initialize the flags so that, if sysctl fails for some bizarre
+            // reason, we get a predictable result.
+
+            info.kp_proc.p_flag = 0;
+
+            // Initialize mib, which tells sysctl the info we want, in this case
+            // we're looking for information about a specific process ID.
+
+            mib[0] = CTL_KERN;
+            mib[1] = KERN_PROC;
+            mib[2] = KERN_PROC_PID;
+            mib[3] = getpid();
+
+            // Call sysctl.
+
+            size = sizeof(info);
+            if( sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, nullptr, 0) != 0 ) {
+                Catch::cerr() << "\n** Call to sysctl failed - unable to determine if debugger is active **\n" << std::endl;
+                return false;
+            }
+
+            // We're being debugged if the P_TRACED flag is set.
+
+            return ( (info.kp_proc.p_flag & P_TRACED) != 0 );
+        }
+    } // namespace Catch
+
+#elif defined(CATCH_PLATFORM_LINUX)
+    #include <fstream>
+    #include <string>
+
+    namespace Catch{
+        // The standard POSIX way of detecting a debugger is to attempt to
+        // ptrace() the process, but this needs to be done from a child and not
+        // this process itself to still allow attaching to this process later
+        // if wanted, so is rather heavy. Under Linux we have the PID of the
+        // "debugger" (which doesn't need to be gdb, of course, it could also
+        // be strace, for example) in /proc/$PID/status, so just get it from
+        // there instead.
+        bool isDebuggerActive(){
+            // Libstdc++ has a bug, where std::ifstream sets errno to 0
+            // This way our users can properly assert over errno values
+            ErrnoGuard guard;
+            std::ifstream in("/proc/self/status");
+            for( std::string line; std::getline(in, line); ) {
+                static const int PREFIX_LEN = 11;
+                if( line.compare(0, PREFIX_LEN, "TracerPid:\t") == 0 ) {
+                    // We're traced if the PID is not 0 and no other PID starts
+                    // with 0 digit, so it's enough to check for just a single
+                    // character.
+                    return line.length() > PREFIX_LEN && line[PREFIX_LEN] != '0';
+                }
+            }
+
+            return false;
+        }
+    } // namespace Catch
+#elif defined(_MSC_VER)
+    extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
+    namespace Catch {
+        bool isDebuggerActive() {
+            return IsDebuggerPresent() != 0;
+        }
+    }
+#elif defined(__MINGW32__)
+    extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();
+    namespace Catch {
+        bool isDebuggerActive() {
+            return IsDebuggerPresent() != 0;
+        }
+    }
+#else
+    namespace Catch {
+       bool isDebuggerActive() { return false; }
+    }
+#endif // Platform
+// end catch_debugger.cpp
+// start catch_decomposer.cpp
+
+namespace Catch {
+
+    ITransientExpression::~ITransientExpression() = default;
+
+    void formatReconstructedExpression( std::ostream &os, std::string const& lhs, StringRef op, std::string const& rhs ) {
+        if( lhs.size() + rhs.size() < 40 &&
+                lhs.find('\n') == std::string::npos &&
+                rhs.find('\n') == std::string::npos )
+            os << lhs << " " << op << " " << rhs;
+        else
+            os << lhs << "\n" << op << "\n" << rhs;
+    }
+}
+// end catch_decomposer.cpp
+// start catch_enforce.cpp
+
+namespace Catch {
+#if defined(CATCH_CONFIG_DISABLE_EXCEPTIONS) && !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS_CUSTOM_HANDLER)
+    [[noreturn]]
+    void throw_exception(std::exception const& e) {
+        Catch::cerr() << "Catch will terminate because it needed to throw an exception.\n"
+                      << "The message was: " << e.what() << '\n';
+        std::terminate();
+    }
+#endif
+} // namespace Catch;
+// end catch_enforce.cpp
+// start catch_errno_guard.cpp
+
+#include <cerrno>
+
+namespace Catch {
+        ErrnoGuard::ErrnoGuard():m_oldErrno(errno){}
+        ErrnoGuard::~ErrnoGuard() { errno = m_oldErrno; }
+}
+// end catch_errno_guard.cpp
+// start catch_exception_translator_registry.cpp
+
+// start catch_exception_translator_registry.h
+
+#include <vector>
+#include <string>
+#include <memory>
+
+namespace Catch {
+
+    class ExceptionTranslatorRegistry : public IExceptionTranslatorRegistry {
+    public:
+        ~ExceptionTranslatorRegistry();
+        virtual void registerTranslator( const IExceptionTranslator* translator );
+        virtual std::string translateActiveException() const override;
+        std::string tryTranslators() const;
+
+    private:
+        std::vector<std::unique_ptr<IExceptionTranslator const>> m_translators;
+    };
+}
+
+// end catch_exception_translator_registry.h
+#ifdef __OBJC__
+#import "Foundation/Foundation.h"
+#endif
+
+namespace Catch {
+
+    ExceptionTranslatorRegistry::~ExceptionTranslatorRegistry() {
+    }
+
+    void ExceptionTranslatorRegistry::registerTranslator( const IExceptionTranslator* translator ) {
+        m_translators.push_back( std::unique_ptr<const IExceptionTranslator>( translator ) );
+    }
+
+#if !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+    std::string ExceptionTranslatorRegistry::translateActiveException() const {
+        try {
+#ifdef __OBJC__
+            // In Objective-C try objective-c exceptions first
+            @try {
+                return tryTranslators();
+            }
+            @catch (NSException *exception) {
+                return Catch::Detail::stringify( [exception description] );
+            }
+#else
+            // Compiling a mixed mode project with MSVC means that CLR
+            // exceptions will be caught in (...) as well. However, these
+            // do not fill-in std::current_exception and thus lead to crash
+            // when attempting rethrow.
+            // /EHa switch also causes structured exceptions to be caught
+            // here, but they fill-in current_exception properly, so
+            // at worst the output should be a little weird, instead of
+            // causing a crash.
+            if (std::current_exception() == nullptr) {
+                return "Non C++ exception. Possibly a CLR exception.";
+            }
+            return tryTranslators();
+#endif
+        }
+        catch( TestFailureException& ) {
+            std::rethrow_exception(std::current_exception());
+        }
+        catch( std::exception& ex ) {
+            return ex.what();
+        }
+        catch( std::string& msg ) {
+            return msg;
+        }
+        catch( const char* msg ) {
+            return msg;
+        }
+        catch(...) {
+            return "Unknown exception";
+        }
+    }
+
+#else // ^^ Exceptions are enabled // Exceptions are disabled vv
+    std::string ExceptionTranslatorRegistry::translateActiveException() const {
+        CATCH_INTERNAL_ERROR("Attempted to translate active exception under CATCH_CONFIG_DISABLE_EXCEPTIONS!");
+    }
+#endif
+
+    std::string ExceptionTranslatorRegistry::tryTranslators() const {
+        if( m_translators.empty() )
+            std::rethrow_exception(std::current_exception());
+        else
+            return m_translators[0]->translate( m_translators.begin()+1, m_translators.end() );
+    }
+}
+// end catch_exception_translator_registry.cpp
+// start catch_fatal_condition.cpp
+
+#if defined(__GNUC__)
+#    pragma GCC diagnostic push
+#    pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+#if defined( CATCH_CONFIG_WINDOWS_SEH ) || defined( CATCH_CONFIG_POSIX_SIGNALS )
+
+namespace {
+    // Report the error condition
+    void reportFatal( char const * const message ) {
+        Catch::getCurrentContext().getResultCapture()->handleFatalErrorCondition( message );
+    }
+}
+
+#endif // signals/SEH handling
+
+#if defined( CATCH_CONFIG_WINDOWS_SEH )
+
+namespace Catch {
+    struct SignalDefs { DWORD id; const char* name; };
+
+    // There is no 1-1 mapping between signals and windows exceptions.
+    // Windows can easily distinguish between SO and SigSegV,
+    // but SigInt, SigTerm, etc are handled differently.
+    static SignalDefs signalDefs[] = {
+        { EXCEPTION_ILLEGAL_INSTRUCTION,  "SIGILL - Illegal instruction signal" },
+        { EXCEPTION_STACK_OVERFLOW, "SIGSEGV - Stack overflow" },
+        { EXCEPTION_ACCESS_VIOLATION, "SIGSEGV - Segmentation violation signal" },
+        { EXCEPTION_INT_DIVIDE_BY_ZERO, "Divide by zero error" },
+    };
+
+    LONG CALLBACK FatalConditionHandler::handleVectoredException(PEXCEPTION_POINTERS ExceptionInfo) {
+        for (auto const& def : signalDefs) {
+            if (ExceptionInfo->ExceptionRecord->ExceptionCode == def.id) {
+                reportFatal(def.name);
+            }
+        }
+        // If its not an exception we care about, pass it along.
+        // This stops us from eating debugger breaks etc.
+        return EXCEPTION_CONTINUE_SEARCH;
+    }
+
+    FatalConditionHandler::FatalConditionHandler() {
+        isSet = true;
+        // 32k seems enough for Catch to handle stack overflow,
+        // but the value was found experimentally, so there is no strong guarantee
+        guaranteeSize = 32 * 1024;
+        exceptionHandlerHandle = nullptr;
+        // Register as first handler in current chain
+        exceptionHandlerHandle = AddVectoredExceptionHandler(1, handleVectoredException);
+        // Pass in guarantee size to be filled
+        SetThreadStackGuarantee(&guaranteeSize);
+    }
+
+    void FatalConditionHandler::reset() {
+        if (isSet) {
+            RemoveVectoredExceptionHandler(exceptionHandlerHandle);
+            SetThreadStackGuarantee(&guaranteeSize);
+            exceptionHandlerHandle = nullptr;
+            isSet = false;
+        }
+    }
+
+    FatalConditionHandler::~FatalConditionHandler() {
+        reset();
+    }
+
+bool FatalConditionHandler::isSet = false;
+ULONG FatalConditionHandler::guaranteeSize = 0;
+PVOID FatalConditionHandler::exceptionHandlerHandle = nullptr;
+
+} // namespace Catch
+
+#elif defined( CATCH_CONFIG_POSIX_SIGNALS )
+
+namespace Catch {
+
+    struct SignalDefs {
+        int id;
+        const char* name;
+    };
+
+    // 32kb for the alternate stack seems to be sufficient. However, this value
+    // is experimentally determined, so that's not guaranteed.
+    constexpr static std::size_t sigStackSize = 32768 >= MINSIGSTKSZ ? 32768 : MINSIGSTKSZ;
+
+    static SignalDefs signalDefs[] = {
+        { SIGINT,  "SIGINT - Terminal interrupt signal" },
+        { SIGILL,  "SIGILL - Illegal instruction signal" },
+        { SIGFPE,  "SIGFPE - Floating point error signal" },
+        { SIGSEGV, "SIGSEGV - Segmentation violation signal" },
+        { SIGTERM, "SIGTERM - Termination request signal" },
+        { SIGABRT, "SIGABRT - Abort (abnormal termination) signal" }
+    };
+
+    void FatalConditionHandler::handleSignal( int sig ) {
+        char const * name = "<unknown signal>";
+        for (auto const& def : signalDefs) {
+            if (sig == def.id) {
+                name = def.name;
+                break;
+            }
+        }
+        reset();
+        reportFatal(name);
+        raise( sig );
+    }
+
+    FatalConditionHandler::FatalConditionHandler() {
+        isSet = true;
+        stack_t sigStack;
+        sigStack.ss_sp = altStackMem;
+        sigStack.ss_size = sigStackSize;
+        sigStack.ss_flags = 0;
+        sigaltstack(&sigStack, &oldSigStack);
+        struct sigaction sa = { };
+
+        sa.sa_handler = handleSignal;
+        sa.sa_flags = SA_ONSTACK;
+        for (std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i) {
+            sigaction(signalDefs[i].id, &sa, &oldSigActions[i]);
+        }
+    }
+
+    FatalConditionHandler::~FatalConditionHandler() {
+        reset();
+    }
+
+    void FatalConditionHandler::reset() {
+        if( isSet ) {
+            // Set signals back to previous values -- hopefully nobody overwrote them in the meantime
+            for( std::size_t i = 0; i < sizeof(signalDefs)/sizeof(SignalDefs); ++i ) {
+                sigaction(signalDefs[i].id, &oldSigActions[i], nullptr);
+            }
+            // Return the old stack
+            sigaltstack(&oldSigStack, nullptr);
+            isSet = false;
+        }
+    }
+
+    bool FatalConditionHandler::isSet = false;
+    struct sigaction FatalConditionHandler::oldSigActions[sizeof(signalDefs)/sizeof(SignalDefs)] = {};
+    stack_t FatalConditionHandler::oldSigStack = {};
+    char FatalConditionHandler::altStackMem[sigStackSize] = {};
+
+} // namespace Catch
+
+#else
+
+namespace Catch {
+    void FatalConditionHandler::reset() {}
+}
+
+#endif // signals/SEH handling
+
+#if defined(__GNUC__)
+#    pragma GCC diagnostic pop
+#endif
+// end catch_fatal_condition.cpp
+// start catch_generators.cpp
+
+// start catch_random_number_generator.h
+
+#include <algorithm>
+#include <random>
+
+namespace Catch {
+
+    struct IConfig;
+
+    std::mt19937& rng();
+    void seedRng( IConfig const& config );
+    unsigned int rngSeed();
+
+}
+
+// end catch_random_number_generator.h
+#include <limits>
+#include <set>
+
+namespace Catch {
+
+IGeneratorTracker::~IGeneratorTracker() {}
+
+namespace Generators {
+
+    GeneratorBase::~GeneratorBase() {}
+
+    std::vector<size_t> randomiseIndices( size_t selectionSize, size_t sourceSize ) {
+
+        assert( selectionSize <= sourceSize );
+        std::vector<size_t> indices;
+        indices.reserve( selectionSize );
+        std::uniform_int_distribution<size_t> uid( 0, sourceSize-1 );
+
+        std::set<size_t> seen;
+        // !TBD: improve this algorithm
+        while( indices.size() < selectionSize ) {
+            auto index = uid( rng() );
+            if( seen.insert( index ).second )
+                indices.push_back( index );
+        }
+        return indices;
+    }
+
+    auto acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker& {
+        return getResultCapture().acquireGeneratorTracker( lineInfo );
+    }
+
+    template<>
+    auto all<int>() -> Generator<int> {
+        return range( std::numeric_limits<int>::min(), std::numeric_limits<int>::max() );
+    }
+
+} // namespace Generators
+} // namespace Catch
+// end catch_generators.cpp
+// start catch_interfaces_capture.cpp
+
+namespace Catch {
+    IResultCapture::~IResultCapture() = default;
+}
+// end catch_interfaces_capture.cpp
+// start catch_interfaces_config.cpp
+
+namespace Catch {
+    IConfig::~IConfig() = default;
+}
+// end catch_interfaces_config.cpp
+// start catch_interfaces_exception.cpp
+
+namespace Catch {
+    IExceptionTranslator::~IExceptionTranslator() = default;
+    IExceptionTranslatorRegistry::~IExceptionTranslatorRegistry() = default;
+}
+// end catch_interfaces_exception.cpp
+// start catch_interfaces_registry_hub.cpp
+
+namespace Catch {
+    IRegistryHub::~IRegistryHub() = default;
+    IMutableRegistryHub::~IMutableRegistryHub() = default;
+}
+// end catch_interfaces_registry_hub.cpp
+// start catch_interfaces_reporter.cpp
+
+// start catch_reporter_listening.h
+
+namespace Catch {
+
+    class ListeningReporter : public IStreamingReporter {
+        using Reporters = std::vector<IStreamingReporterPtr>;
+        Reporters m_listeners;
+        IStreamingReporterPtr m_reporter = nullptr;
+        ReporterPreferences m_preferences;
+
+    public:
+        ListeningReporter();
+
+        void addListener( IStreamingReporterPtr&& listener );
+        void addReporter( IStreamingReporterPtr&& reporter );
+
+    public: // IStreamingReporter
+
+        ReporterPreferences getPreferences() const override;
+
+        void noMatchingTestCases( std::string const& spec ) override;
+
+        static std::set<Verbosity> getSupportedVerbosities();
+
+        void benchmarkStarting( BenchmarkInfo const& benchmarkInfo ) override;
+        void benchmarkEnded( BenchmarkStats const& benchmarkStats ) override;
+
+        void testRunStarting( TestRunInfo const& testRunInfo ) override;
+        void testGroupStarting( GroupInfo const& groupInfo ) override;
+        void testCaseStarting( TestCaseInfo const& testInfo ) override;
+        void sectionStarting( SectionInfo const& sectionInfo ) override;
+        void assertionStarting( AssertionInfo const& assertionInfo ) override;
+
+        // The return value indicates if the messages buffer should be cleared:
+        bool assertionEnded( AssertionStats const& assertionStats ) override;
+        void sectionEnded( SectionStats const& sectionStats ) override;
+        void testCaseEnded( TestCaseStats const& testCaseStats ) override;
+        void testGroupEnded( TestGroupStats const& testGroupStats ) override;
+        void testRunEnded( TestRunStats const& testRunStats ) override;
+
+        void skipTest( TestCaseInfo const& testInfo ) override;
+        bool isMulti() const override;
+
+    };
+
+} // end namespace Catch
+
+// end catch_reporter_listening.h
+namespace Catch {
+
+    ReporterConfig::ReporterConfig( IConfigPtr const& _fullConfig )
+    :   m_stream( &_fullConfig->stream() ), m_fullConfig( _fullConfig ) {}
+
+    ReporterConfig::ReporterConfig( IConfigPtr const& _fullConfig, std::ostream& _stream )
+    :   m_stream( &_stream ), m_fullConfig( _fullConfig ) {}
+
+    std::ostream& ReporterConfig::stream() const { return *m_stream; }
+    IConfigPtr ReporterConfig::fullConfig() const { return m_fullConfig; }
+
+    TestRunInfo::TestRunInfo( std::string const& _name ) : name( _name ) {}
+
+    GroupInfo::GroupInfo(  std::string const& _name,
+                           std::size_t _groupIndex,
+                           std::size_t _groupsCount )
+    :   name( _name ),
+        groupIndex( _groupIndex ),
+        groupsCounts( _groupsCount )
+    {}
+
+     AssertionStats::AssertionStats( AssertionResult const& _assertionResult,
+                                     std::vector<MessageInfo> const& _infoMessages,
+                                     Totals const& _totals )
+    :   assertionResult( _assertionResult ),
+        infoMessages( _infoMessages ),
+        totals( _totals )
+    {
+        assertionResult.m_resultData.lazyExpression.m_transientExpression = _assertionResult.m_resultData.lazyExpression.m_transientExpression;
+
+        if( assertionResult.hasMessage() ) {
+            // Copy message into messages list.
+            // !TBD This should have been done earlier, somewhere
+            MessageBuilder builder( assertionResult.getTestMacroName(), assertionResult.getSourceInfo(), assertionResult.getResultType() );
+            builder << assertionResult.getMessage();
+            builder.m_info.message = builder.m_stream.str();
+
+            infoMessages.push_back( builder.m_info );
+        }
+    }
+
+     AssertionStats::~AssertionStats() = default;
+
+    SectionStats::SectionStats(  SectionInfo const& _sectionInfo,
+                                 Counts const& _assertions,
+                                 double _durationInSeconds,
+                                 bool _missingAssertions )
+    :   sectionInfo( _sectionInfo ),
+        assertions( _assertions ),
+        durationInSeconds( _durationInSeconds ),
+        missingAssertions( _missingAssertions )
+    {}
+
+    SectionStats::~SectionStats() = default;
+
+    TestCaseStats::TestCaseStats(  TestCaseInfo const& _testInfo,
+                                   Totals const& _totals,
+                                   std::string const& _stdOut,
+                                   std::string const& _stdErr,
+                                   bool _aborting )
+    : testInfo( _testInfo ),
+        totals( _totals ),
+        stdOut( _stdOut ),
+        stdErr( _stdErr ),
+        aborting( _aborting )
+    {}
+
+    TestCaseStats::~TestCaseStats() = default;
+
+    TestGroupStats::TestGroupStats( GroupInfo const& _groupInfo,
+                                    Totals const& _totals,
+                                    bool _aborting )
+    :   groupInfo( _groupInfo ),
+        totals( _totals ),
+        aborting( _aborting )
+    {}
+
+    TestGroupStats::TestGroupStats( GroupInfo const& _groupInfo )
+    :   groupInfo( _groupInfo ),
+        aborting( false )
+    {}
+
+    TestGroupStats::~TestGroupStats() = default;
+
+    TestRunStats::TestRunStats(   TestRunInfo const& _runInfo,
+                    Totals const& _totals,
+                    bool _aborting )
+    :   runInfo( _runInfo ),
+        totals( _totals ),
+        aborting( _aborting )
+    {}
+
+    TestRunStats::~TestRunStats() = default;
+
+    void IStreamingReporter::fatalErrorEncountered( StringRef ) {}
+    bool IStreamingReporter::isMulti() const { return false; }
+
+    IReporterFactory::~IReporterFactory() = default;
+    IReporterRegistry::~IReporterRegistry() = default;
+
+} // end namespace Catch
+// end catch_interfaces_reporter.cpp
+// start catch_interfaces_runner.cpp
+
+namespace Catch {
+    IRunner::~IRunner() = default;
+}
+// end catch_interfaces_runner.cpp
+// start catch_interfaces_testcase.cpp
+
+namespace Catch {
+    ITestInvoker::~ITestInvoker() = default;
+    ITestCaseRegistry::~ITestCaseRegistry() = default;
+}
+// end catch_interfaces_testcase.cpp
+// start catch_leak_detector.cpp
+
+#ifdef CATCH_CONFIG_WINDOWS_CRTDBG
+#include <crtdbg.h>
+
+namespace Catch {
+
+    LeakDetector::LeakDetector() {
+        int flag = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
+        flag |= _CRTDBG_LEAK_CHECK_DF;
+        flag |= _CRTDBG_ALLOC_MEM_DF;
+        _CrtSetDbgFlag(flag);
+        _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
+        _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
+        // Change this to leaking allocation's number to break there
+        _CrtSetBreakAlloc(-1);
+    }
+}
+
+#else
+
+    Catch::LeakDetector::LeakDetector() {}
+
+#endif
+
+Catch::LeakDetector::~LeakDetector() {
+    Catch::cleanUp();
+}
+// end catch_leak_detector.cpp
+// start catch_list.cpp
+
+// start catch_list.h
+
+#include <set>
+
+namespace Catch {
+
+    std::size_t listTests( Config const& config );
+
+    std::size_t listTestsNamesOnly( Config const& config );
+
+    struct TagInfo {
+        void add( std::string const& spelling );
+        std::string all() const;
+
+        std::set<std::string> spellings;
+        std::size_t count = 0;
+    };
+
+    std::size_t listTags( Config const& config );
+
+    std::size_t listReporters();
+
+    Option<std::size_t> list( Config const& config );
+
+} // end namespace Catch
+
+// end catch_list.h
+// start catch_text.h
+
+namespace Catch {
+    using namespace clara::TextFlow;
+}
+
+// end catch_text.h
+#include <limits>
+#include <algorithm>
+#include <iomanip>
+
+namespace Catch {
+
+    std::size_t listTests( Config const& config ) {
+        TestSpec testSpec = config.testSpec();
+        if( config.hasTestFilters() )
+            Catch::cout() << "Matching test cases:\n";
+        else {
+            Catch::cout() << "All available test cases:\n";
+        }
+
+        auto matchedTestCases = filterTests( getAllTestCasesSorted( config ), testSpec, config );
+        for( auto const& testCaseInfo : matchedTestCases ) {
+            Colour::Code colour = testCaseInfo.isHidden()
+                ? Colour::SecondaryText
+                : Colour::None;
+            Colour colourGuard( colour );
+
+            Catch::cout() << Column( testCaseInfo.name ).initialIndent( 2 ).indent( 4 ) << "\n";
+            if( config.verbosity() >= Verbosity::High ) {
+                Catch::cout() << Column( Catch::Detail::stringify( testCaseInfo.lineInfo ) ).indent(4) << std::endl;
+                std::string description = testCaseInfo.description;
+                if( description.empty() )
+                    description = "(NO DESCRIPTION)";
+                Catch::cout() << Column( description ).indent(4) << std::endl;
+            }
+            if( !testCaseInfo.tags.empty() )
+                Catch::cout() << Column( testCaseInfo.tagsAsString() ).indent( 6 ) << "\n";
+        }
+
+        if( !config.hasTestFilters() )
+            Catch::cout() << pluralise( matchedTestCases.size(), "test case" ) << '\n' << std::endl;
+        else
+            Catch::cout() << pluralise( matchedTestCases.size(), "matching test case" ) << '\n' << std::endl;
+        return matchedTestCases.size();
+    }
+
+    std::size_t listTestsNamesOnly( Config const& config ) {
+        TestSpec testSpec = config.testSpec();
+        std::size_t matchedTests = 0;
+        std::vector<TestCase> matchedTestCases = filterTests( getAllTestCasesSorted( config ), testSpec, config );
+        for( auto const& testCaseInfo : matchedTestCases ) {
+            matchedTests++;
+            if( startsWith( testCaseInfo.name, '#' ) )
+               Catch::cout() << '"' << testCaseInfo.name << '"';
+            else
+               Catch::cout() << testCaseInfo.name;
+            if ( config.verbosity() >= Verbosity::High )
+                Catch::cout() << "\t@" << testCaseInfo.lineInfo;
+            Catch::cout() << std::endl;
+        }
+        return matchedTests;
+    }
+
+    void TagInfo::add( std::string const& spelling ) {
+        ++count;
+        spellings.insert( spelling );
+    }
+
+    std::string TagInfo::all() const {
+        std::string out;
+        for( auto const& spelling : spellings )
+            out += "[" + spelling + "]";
+        return out;
+    }
+
+    std::size_t listTags( Config const& config ) {
+        TestSpec testSpec = config.testSpec();
+        if( config.hasTestFilters() )
+            Catch::cout() << "Tags for matching test cases:\n";
+        else {
+            Catch::cout() << "All available tags:\n";
+        }
+
+        std::map<std::string, TagInfo> tagCounts;
+
+        std::vector<TestCase> matchedTestCases = filterTests( getAllTestCasesSorted( config ), testSpec, config );
+        for( auto const& testCase : matchedTestCases ) {
+            for( auto const& tagName : testCase.getTestCaseInfo().tags ) {
+                std::string lcaseTagName = toLower( tagName );
+                auto countIt = tagCounts.find( lcaseTagName );
+                if( countIt == tagCounts.end() )
+                    countIt = tagCounts.insert( std::make_pair( lcaseTagName, TagInfo() ) ).first;
+                countIt->second.add( tagName );
+            }
+        }
+
+        for( auto const& tagCount : tagCounts ) {
+            ReusableStringStream rss;
+            rss << "  " << std::setw(2) << tagCount.second.count << "  ";
+            auto str = rss.str();
+            auto wrapper = Column( tagCount.second.all() )
+                                                    .initialIndent( 0 )
+                                                    .indent( str.size() )
+                                                    .width( CATCH_CONFIG_CONSOLE_WIDTH-10 );
+            Catch::cout() << str << wrapper << '\n';
+        }
+        Catch::cout() << pluralise( tagCounts.size(), "tag" ) << '\n' << std::endl;
+        return tagCounts.size();
+    }
+
+    std::size_t listReporters() {
+        Catch::cout() << "Available reporters:\n";
+        IReporterRegistry::FactoryMap const& factories = getRegistryHub().getReporterRegistry().getFactories();
+        std::size_t maxNameLen = 0;
+        for( auto const& factoryKvp : factories )
+            maxNameLen = (std::max)( maxNameLen, factoryKvp.first.size() );
+
+        for( auto const& factoryKvp : factories ) {
+            Catch::cout()
+                    << Column( factoryKvp.first + ":" )
+                            .indent(2)
+                            .width( 5+maxNameLen )
+                    +  Column( factoryKvp.second->getDescription() )
+                            .initialIndent(0)
+                            .indent(2)
+                            .width( CATCH_CONFIG_CONSOLE_WIDTH - maxNameLen-8 )
+                    << "\n";
+        }
+        Catch::cout() << std::endl;
+        return factories.size();
+    }
+
+    Option<std::size_t> list( Config const& config ) {
+        Option<std::size_t> listedCount;
+        if( config.listTests() )
+            listedCount = listedCount.valueOr(0) + listTests( config );
+        if( config.listTestNamesOnly() )
+            listedCount = listedCount.valueOr(0) + listTestsNamesOnly( config );
+        if( config.listTags() )
+            listedCount = listedCount.valueOr(0) + listTags( config );
+        if( config.listReporters() )
+            listedCount = listedCount.valueOr(0) + listReporters();
+        return listedCount;
+    }
+
+} // end namespace Catch
+// end catch_list.cpp
+// start catch_matchers.cpp
+
+namespace Catch {
+namespace Matchers {
+    namespace Impl {
+
+        std::string MatcherUntypedBase::toString() const {
+            if( m_cachedToString.empty() )
+                m_cachedToString = describe();
+            return m_cachedToString;
+        }
+
+        MatcherUntypedBase::~MatcherUntypedBase() = default;
+
+    } // namespace Impl
+} // namespace Matchers
+
+using namespace Matchers;
+using Matchers::Impl::MatcherBase;
+
+} // namespace Catch
+// end catch_matchers.cpp
+// start catch_matchers_floating.cpp
+
+// start catch_polyfills.hpp
+
+namespace Catch {
+    bool isnan(float f);
+    bool isnan(double d);
+}
+
+// end catch_polyfills.hpp
+// start catch_to_string.hpp
+
+#include <string>
+
+namespace Catch {
+    template <typename T>
+    std::string to_string(T const& t) {
+#if defined(CATCH_CONFIG_CPP11_TO_STRING)
+        return std::to_string(t);
+#else
+        ReusableStringStream rss;
+        rss << t;
+        return rss.str();
+#endif
+    }
+} // end namespace Catch
+
+// end catch_to_string.hpp
+#include <cstdlib>
+#include <cstdint>
+#include <cstring>
+
+namespace Catch {
+namespace Matchers {
+namespace Floating {
+enum class FloatingPointKind : uint8_t {
+    Float,
+    Double
+};
+}
+}
+}
+
+namespace {
+
+template <typename T>
+struct Converter;
+
+template <>
+struct Converter<float> {
+    static_assert(sizeof(float) == sizeof(int32_t), "Important ULP matcher assumption violated");
+    Converter(float f) {
+        std::memcpy(&i, &f, sizeof(f));
+    }
+    int32_t i;
+};
+
+template <>
+struct Converter<double> {
+    static_assert(sizeof(double) == sizeof(int64_t), "Important ULP matcher assumption violated");
+    Converter(double d) {
+        std::memcpy(&i, &d, sizeof(d));
+    }
+    int64_t i;
+};
+
+template <typename T>
+auto convert(T t) -> Converter<T> {
+    return Converter<T>(t);
+}
+
+template <typename FP>
+bool almostEqualUlps(FP lhs, FP rhs, int maxUlpDiff) {
+    // Comparison with NaN should always be false.
+    // This way we can rule it out before getting into the ugly details
+    if (Catch::isnan(lhs) || Catch::isnan(rhs)) {
+        return false;
+    }
+
+    auto lc = convert(lhs);
+    auto rc = convert(rhs);
+
+    if ((lc.i < 0) != (rc.i < 0)) {
+        // Potentially we can have +0 and -0
+        return lhs == rhs;
+    }
+
+    auto ulpDiff = std::abs(lc.i - rc.i);
+    return ulpDiff <= maxUlpDiff;
+}
+
+}
+
+namespace Catch {
+namespace Matchers {
+namespace Floating {
+    WithinAbsMatcher::WithinAbsMatcher(double target, double margin)
+        :m_target{ target }, m_margin{ margin } {
+        CATCH_ENFORCE(margin >= 0, "Invalid margin: " << margin << '.'
+            << " Margin has to be non-negative.");
+    }
+
+    // Performs equivalent check of std::fabs(lhs - rhs) <= margin
+    // But without the subtraction to allow for INFINITY in comparison
+    bool WithinAbsMatcher::match(double const& matchee) const {
+        return (matchee + m_margin >= m_target) && (m_target + m_margin >= matchee);
+    }
+
+    std::string WithinAbsMatcher::describe() const {
+        return "is within " + ::Catch::Detail::stringify(m_margin) + " of " + ::Catch::Detail::stringify(m_target);
+    }
+
+    WithinUlpsMatcher::WithinUlpsMatcher(double target, int ulps, FloatingPointKind baseType)
+        :m_target{ target }, m_ulps{ ulps }, m_type{ baseType } {
+        CATCH_ENFORCE(ulps >= 0, "Invalid ULP setting: " << ulps << '.'
+            << " ULPs have to be non-negative.");
+    }
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+// Clang <3.5 reports on the default branch in the switch below
+#pragma clang diagnostic ignored "-Wunreachable-code"
+#endif
+
+    bool WithinUlpsMatcher::match(double const& matchee) const {
+        switch (m_type) {
+        case FloatingPointKind::Float:
+            return almostEqualUlps<float>(static_cast<float>(matchee), static_cast<float>(m_target), m_ulps);
+        case FloatingPointKind::Double:
+            return almostEqualUlps<double>(matchee, m_target, m_ulps);
+        default:
+            CATCH_INTERNAL_ERROR( "Unknown FloatingPointKind value" );
+        }
+    }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+    std::string WithinUlpsMatcher::describe() const {
+        return "is within " + Catch::to_string(m_ulps) + " ULPs of " + ::Catch::Detail::stringify(m_target) + ((m_type == FloatingPointKind::Float)? "f" : "");
+    }
+
+}// namespace Floating
+
+Floating::WithinUlpsMatcher WithinULP(double target, int maxUlpDiff) {
+    return Floating::WithinUlpsMatcher(target, maxUlpDiff, Floating::FloatingPointKind::Double);
+}
+
+Floating::WithinUlpsMatcher WithinULP(float target, int maxUlpDiff) {
+    return Floating::WithinUlpsMatcher(target, maxUlpDiff, Floating::FloatingPointKind::Float);
+}
+
+Floating::WithinAbsMatcher WithinAbs(double target, double margin) {
+    return Floating::WithinAbsMatcher(target, margin);
+}
+
+} // namespace Matchers
+} // namespace Catch
+
+// end catch_matchers_floating.cpp
+// start catch_matchers_generic.cpp
+
+std::string Catch::Matchers::Generic::Detail::finalizeDescription(const std::string& desc) {
+    if (desc.empty()) {
+        return "matches undescribed predicate";
+    } else {
+        return "matches predicate: \"" + desc + '"';
+    }
+}
+// end catch_matchers_generic.cpp
+// start catch_matchers_string.cpp
+
+#include <regex>
+
+namespace Catch {
+namespace Matchers {
+
+    namespace StdString {
+
+        CasedString::CasedString( std::string const& str, CaseSensitive::Choice caseSensitivity )
+        :   m_caseSensitivity( caseSensitivity ),
+            m_str( adjustString( str ) )
+        {}
+        std::string CasedString::adjustString( std::string const& str ) const {
+            return m_caseSensitivity == CaseSensitive::No
+                   ? toLower( str )
+                   : str;
+        }
+        std::string CasedString::caseSensitivitySuffix() const {
+            return m_caseSensitivity == CaseSensitive::No
+                   ? " (case insensitive)"
+                   : std::string();
+        }
+
+        StringMatcherBase::StringMatcherBase( std::string const& operation, CasedString const& comparator )
+        : m_comparator( comparator ),
+          m_operation( operation ) {
+        }
+
+        std::string StringMatcherBase::describe() const {
+            std::string description;
+            description.reserve(5 + m_operation.size() + m_comparator.m_str.size() +
+                                        m_comparator.caseSensitivitySuffix().size());
+            description += m_operation;
+            description += ": \"";
+            description += m_comparator.m_str;
+            description += "\"";
+            description += m_comparator.caseSensitivitySuffix();
+            return description;
+        }
+
+        EqualsMatcher::EqualsMatcher( CasedString const& comparator ) : StringMatcherBase( "equals", comparator ) {}
+
+        bool EqualsMatcher::match( std::string const& source ) const {
+            return m_comparator.adjustString( source ) == m_comparator.m_str;
+        }
+
+        ContainsMatcher::ContainsMatcher( CasedString const& comparator ) : StringMatcherBase( "contains", comparator ) {}
+
+        bool ContainsMatcher::match( std::string const& source ) const {
+            return contains( m_comparator.adjustString( source ), m_comparator.m_str );
+        }
+
+        StartsWithMatcher::StartsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "starts with", comparator ) {}
+
+        bool StartsWithMatcher::match( std::string const& source ) const {
+            return startsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        }
+
+        EndsWithMatcher::EndsWithMatcher( CasedString const& comparator ) : StringMatcherBase( "ends with", comparator ) {}
+
+        bool EndsWithMatcher::match( std::string const& source ) const {
+            return endsWith( m_comparator.adjustString( source ), m_comparator.m_str );
+        }
+
+        RegexMatcher::RegexMatcher(std::string regex, CaseSensitive::Choice caseSensitivity): m_regex(std::move(regex)), m_caseSensitivity(caseSensitivity) {}
+
+        bool RegexMatcher::match(std::string const& matchee) const {
+            auto flags = std::regex::ECMAScript; // ECMAScript is the default syntax option anyway
+            if (m_caseSensitivity == CaseSensitive::Choice::No) {
+                flags |= std::regex::icase;
+            }
+            auto reg = std::regex(m_regex, flags);
+            return std::regex_match(matchee, reg);
+        }
+
+        std::string RegexMatcher::describe() const {
+            return "matches " + ::Catch::Detail::stringify(m_regex) + ((m_caseSensitivity == CaseSensitive::Choice::Yes)? " case sensitively" : " case insensitively");
+        }
+
+    } // namespace StdString
+
+    StdString::EqualsMatcher Equals( std::string const& str, CaseSensitive::Choice caseSensitivity ) {
+        return StdString::EqualsMatcher( StdString::CasedString( str, caseSensitivity) );
+    }
+    StdString::ContainsMatcher Contains( std::string const& str, CaseSensitive::Choice caseSensitivity ) {
+        return StdString::ContainsMatcher( StdString::CasedString( str, caseSensitivity) );
+    }
+    StdString::EndsWithMatcher EndsWith( std::string const& str, CaseSensitive::Choice caseSensitivity ) {
+        return StdString::EndsWithMatcher( StdString::CasedString( str, caseSensitivity) );
+    }
+    StdString::StartsWithMatcher StartsWith( std::string const& str, CaseSensitive::Choice caseSensitivity ) {
+        return StdString::StartsWithMatcher( StdString::CasedString( str, caseSensitivity) );
+    }
+
+    StdString::RegexMatcher Matches(std::string const& regex, CaseSensitive::Choice caseSensitivity) {
+        return StdString::RegexMatcher(regex, caseSensitivity);
+    }
+
+} // namespace Matchers
+} // namespace Catch
+// end catch_matchers_string.cpp
+// start catch_message.cpp
+
+// start catch_uncaught_exceptions.h
+
+namespace Catch {
+    bool uncaught_exceptions();
+} // end namespace Catch
+
+// end catch_uncaught_exceptions.h
+#include <cassert>
+#include <stack>
+
+namespace Catch {
+
+    MessageInfo::MessageInfo(   StringRef const& _macroName,
+                                SourceLineInfo const& _lineInfo,
+                                ResultWas::OfType _type )
+    :   macroName( _macroName ),
+        lineInfo( _lineInfo ),
+        type( _type ),
+        sequence( ++globalCount )
+    {}
+
+    bool MessageInfo::operator==( MessageInfo const& other ) const {
+        return sequence == other.sequence;
+    }
+
+    bool MessageInfo::operator<( MessageInfo const& other ) const {
+        return sequence < other.sequence;
+    }
+
+    // This may need protecting if threading support is added
+    unsigned int MessageInfo::globalCount = 0;
+
+    ////////////////////////////////////////////////////////////////////////////
+
+    Catch::MessageBuilder::MessageBuilder( StringRef const& macroName,
+                                           SourceLineInfo const& lineInfo,
+                                           ResultWas::OfType type )
+        :m_info(macroName, lineInfo, type) {}
+
+    ////////////////////////////////////////////////////////////////////////////
+
+    ScopedMessage::ScopedMessage( MessageBuilder const& builder )
+    : m_info( builder.m_info )
+    {
+        m_info.message = builder.m_stream.str();
+        getResultCapture().pushScopedMessage( m_info );
+    }
+
+    ScopedMessage::~ScopedMessage() {
+        if ( !uncaught_exceptions() ){
+            getResultCapture().popScopedMessage(m_info);
+        }
+    }
+
+    Capturer::Capturer( StringRef macroName, SourceLineInfo const& lineInfo, ResultWas::OfType resultType, StringRef names ) {
+        auto trimmed = [&] (size_t start, size_t end) {
+            while (names[start] == ',' || isspace(names[start])) {
+                ++start;
+            }
+            while (names[end] == ',' || isspace(names[end])) {
+                --end;
+            }
+            return names.substr(start, end - start + 1);
+        };
+
+        size_t start = 0;
+        std::stack<char> openings;
+        for (size_t pos = 0; pos < names.size(); ++pos) {
+            char c = names[pos];
+            switch (c) {
+            case '[':
+            case '{':
+            case '(':
+            // It is basically impossible to disambiguate between
+            // comparison and start of template args in this context
+//            case '<':
+                openings.push(c);
+                break;
+            case ']':
+            case '}':
+            case ')':
+//           case '>':
+                openings.pop();
+                break;
+            case ',':
+                if (start != pos && openings.size() == 0) {
+                    m_messages.emplace_back(macroName, lineInfo, resultType);
+                    m_messages.back().message = trimmed(start, pos);
+                    m_messages.back().message += " := ";
+                    start = pos;
+                }
+            }
+        }
+        assert(openings.size() == 0 && "Mismatched openings");
+        m_messages.emplace_back(macroName, lineInfo, resultType);
+        m_messages.back().message = trimmed(start, names.size() - 1);
+        m_messages.back().message += " := ";
+    }
+    Capturer::~Capturer() {
+        if ( !uncaught_exceptions() ){
+            assert( m_captured == m_messages.size() );
+            for( size_t i = 0; i < m_captured; ++i  )
+                m_resultCapture.popScopedMessage( m_messages[i] );
+        }
+    }
+
+    void Capturer::captureValue( size_t index, std::string const& value ) {
+        assert( index < m_messages.size() );
+        m_messages[index].message += value;
+        m_resultCapture.pushScopedMessage( m_messages[index] );
+        m_captured++;
+    }
+
+} // end namespace Catch
+// end catch_message.cpp
+// start catch_output_redirect.cpp
+
+// start catch_output_redirect.h
+#ifndef TWOBLUECUBES_CATCH_OUTPUT_REDIRECT_H
+#define TWOBLUECUBES_CATCH_OUTPUT_REDIRECT_H
+
+#include <cstdio>
+#include <iosfwd>
+#include <string>
+
+namespace Catch {
+
+    class RedirectedStream {
+        std::ostream& m_originalStream;
+        std::ostream& m_redirectionStream;
+        std::streambuf* m_prevBuf;
+
+    public:
+        RedirectedStream( std::ostream& originalStream, std::ostream& redirectionStream );
+        ~RedirectedStream();
+    };
+
+    class RedirectedStdOut {
+        ReusableStringStream m_rss;
+        RedirectedStream m_cout;
+    public:
+        RedirectedStdOut();
+        auto str() const -> std::string;
+    };
+
+    // StdErr has two constituent streams in C++, std::cerr and std::clog
+    // This means that we need to redirect 2 streams into 1 to keep proper
+    // order of writes
+    class RedirectedStdErr {
+        ReusableStringStream m_rss;
+        RedirectedStream m_cerr;
+        RedirectedStream m_clog;
+    public:
+        RedirectedStdErr();
+        auto str() const -> std::string;
+    };
+
+#if defined(CATCH_CONFIG_NEW_CAPTURE)
+
+    // Windows's implementation of std::tmpfile is terrible (it tries
+    // to create a file inside system folder, thus requiring elevated
+    // privileges for the binary), so we have to use tmpnam(_s) and
+    // create the file ourselves there.
+    class TempFile {
+    public:
+        TempFile(TempFile const&) = delete;
+        TempFile& operator=(TempFile const&) = delete;
+        TempFile(TempFile&&) = delete;
+        TempFile& operator=(TempFile&&) = delete;
+
+        TempFile();
+        ~TempFile();
+
+        std::FILE* getFile();
+        std::string getContents();
+
+    private:
+        std::FILE* m_file = nullptr;
+    #if defined(_MSC_VER)
+        char m_buffer[L_tmpnam] = { 0 };
+    #endif
+    };
+
+    class OutputRedirect {
+    public:
+        OutputRedirect(OutputRedirect const&) = delete;
+        OutputRedirect& operator=(OutputRedirect const&) = delete;
+        OutputRedirect(OutputRedirect&&) = delete;
+        OutputRedirect& operator=(OutputRedirect&&) = delete;
+
+        OutputRedirect(std::string& stdout_dest, std::string& stderr_dest);
+        ~OutputRedirect();
+
+    private:
+        int m_originalStdout = -1;
+        int m_originalStderr = -1;
+        TempFile m_stdoutFile;
+        TempFile m_stderrFile;
+        std::string& m_stdoutDest;
+        std::string& m_stderrDest;
+    };
+
+#endif
+
+} // end namespace Catch
+
+#endif // TWOBLUECUBES_CATCH_OUTPUT_REDIRECT_H
+// end catch_output_redirect.h
+#include <cstdio>
+#include <cstring>
+#include <fstream>
+#include <sstream>
+#include <stdexcept>
+
+#if defined(CATCH_CONFIG_NEW_CAPTURE)
+    #if defined(_MSC_VER)
+    #include <io.h>      //_dup and _dup2
+    #define dup _dup
+    #define dup2 _dup2
+    #define fileno _fileno
+    #else
+    #include <unistd.h>  // dup and dup2
+    #endif
+#endif
+
+namespace Catch {
+
+    RedirectedStream::RedirectedStream( std::ostream& originalStream, std::ostream& redirectionStream )
+    :   m_originalStream( originalStream ),
+        m_redirectionStream( redirectionStream ),
+        m_prevBuf( m_originalStream.rdbuf() )
+    {
+        m_originalStream.rdbuf( m_redirectionStream.rdbuf() );
+    }
+
+    RedirectedStream::~RedirectedStream() {
+        m_originalStream.rdbuf( m_prevBuf );
+    }
+
+    RedirectedStdOut::RedirectedStdOut() : m_cout( Catch::cout(), m_rss.get() ) {}
+    auto RedirectedStdOut::str() const -> std::string { return m_rss.str(); }
+
+    RedirectedStdErr::RedirectedStdErr()
+    :   m_cerr( Catch::cerr(), m_rss.get() ),
+        m_clog( Catch::clog(), m_rss.get() )
+    {}
+    auto RedirectedStdErr::str() const -> std::string { return m_rss.str(); }
+
+#if defined(CATCH_CONFIG_NEW_CAPTURE)
+
+#if defined(_MSC_VER)
+    TempFile::TempFile() {
+        if (tmpnam_s(m_buffer)) {
+            CATCH_RUNTIME_ERROR("Could not get a temp filename");
+        }
+        if (fopen_s(&m_file, m_buffer, "w")) {
+            char buffer[100];
+            if (strerror_s(buffer, errno)) {
+                CATCH_RUNTIME_ERROR("Could not translate errno to a string");
+            }
+            CATCH_RUNTIME_ERROR("Coul dnot open the temp file: '" << m_buffer << "' because: " << buffer);
+        }
+    }
+#else
+    TempFile::TempFile() {
+        m_file = std::tmpfile();
+        if (!m_file) {
+            CATCH_RUNTIME_ERROR("Could not create a temp file.");
+        }
+    }
+
+#endif
+
+    TempFile::~TempFile() {
+         // TBD: What to do about errors here?
+         std::fclose(m_file);
+         // We manually create the file on Windows only, on Linux
+         // it will be autodeleted
+#if defined(_MSC_VER)
+         std::remove(m_buffer);
+#endif
+    }
+
+    FILE* TempFile::getFile() {
+        return m_file;
+    }
+
+    std::string TempFile::getContents() {
+        std::stringstream sstr;
+        char buffer[100] = {};
+        std::rewind(m_file);
+        while (std::fgets(buffer, sizeof(buffer), m_file)) {
+            sstr << buffer;
+        }
+        return sstr.str();
+    }
+
+    OutputRedirect::OutputRedirect(std::string& stdout_dest, std::string& stderr_dest) :
+        m_originalStdout(dup(1)),
+        m_originalStderr(dup(2)),
+        m_stdoutDest(stdout_dest),
+        m_stderrDest(stderr_dest) {
+        dup2(fileno(m_stdoutFile.getFile()), 1);
+        dup2(fileno(m_stderrFile.getFile()), 2);
+    }
+
+    OutputRedirect::~OutputRedirect() {
+        Catch::cout() << std::flush;
+        fflush(stdout);
+        // Since we support overriding these streams, we flush cerr
+        // even though std::cerr is unbuffered
+        Catch::cerr() << std::flush;
+        Catch::clog() << std::flush;
+        fflush(stderr);
+
+        dup2(m_originalStdout, 1);
+        dup2(m_originalStderr, 2);
+
+        m_stdoutDest += m_stdoutFile.getContents();
+        m_stderrDest += m_stderrFile.getContents();
+    }
+
+#endif // CATCH_CONFIG_NEW_CAPTURE
+
+} // namespace Catch
+
+#if defined(CATCH_CONFIG_NEW_CAPTURE)
+    #if defined(_MSC_VER)
+    #undef dup
+    #undef dup2
+    #undef fileno
+    #endif
+#endif
+// end catch_output_redirect.cpp
+// start catch_polyfills.cpp
+
+#include <cmath>
+
+namespace Catch {
+
+#if !defined(CATCH_CONFIG_POLYFILL_ISNAN)
+    bool isnan(float f) {
+        return std::isnan(f);
+    }
+    bool isnan(double d) {
+        return std::isnan(d);
+    }
+#else
+    // For now we only use this for embarcadero
+    bool isnan(float f) {
+        return std::_isnan(f);
+    }
+    bool isnan(double d) {
+        return std::_isnan(d);
+    }
+#endif
+
+} // end namespace Catch
+// end catch_polyfills.cpp
+// start catch_random_number_generator.cpp
+
+namespace Catch {
+
+    std::mt19937& rng() {
+        static std::mt19937 s_rng;
+        return s_rng;
+    }
+
+    void seedRng( IConfig const& config ) {
+        if( config.rngSeed() != 0 ) {
+            std::srand( config.rngSeed() );
+            rng().seed( config.rngSeed() );
+        }
+    }
+
+    unsigned int rngSeed() {
+        return getCurrentContext().getConfig()->rngSeed();
+    }
+}
+// end catch_random_number_generator.cpp
+// start catch_registry_hub.cpp
+
+// start catch_test_case_registry_impl.h
+
+#include <vector>
+#include <set>
+#include <algorithm>
+#include <ios>
+
+namespace Catch {
+
+    class TestCase;
+    struct IConfig;
+
+    std::vector<TestCase> sortTests( IConfig const& config, std::vector<TestCase> const& unsortedTestCases );
+    bool matchTest( TestCase const& testCase, TestSpec const& testSpec, IConfig const& config );
+
+    void enforceNoDuplicateTestCases( std::vector<TestCase> const& functions );
+
+    std::vector<TestCase> filterTests( std::vector<TestCase> const& testCases, TestSpec const& testSpec, IConfig const& config );
+    std::vector<TestCase> const& getAllTestCasesSorted( IConfig const& config );
+
+    class TestRegistry : public ITestCaseRegistry {
+    public:
+        virtual ~TestRegistry() = default;
+
+        virtual void registerTest( TestCase const& testCase );
+
+        std::vector<TestCase> const& getAllTests() const override;
+        std::vector<TestCase> const& getAllTestsSorted( IConfig const& config ) const override;
+
+    private:
+        std::vector<TestCase> m_functions;
+        mutable RunTests::InWhatOrder m_currentSortOrder = RunTests::InDeclarationOrder;
+        mutable std::vector<TestCase> m_sortedFunctions;
+        std::size_t m_unnamedCount = 0;
+        std::ios_base::Init m_ostreamInit; // Forces cout/ cerr to be initialised
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    class TestInvokerAsFunction : public ITestInvoker {
+        void(*m_testAsFunction)();
+    public:
+        TestInvokerAsFunction( void(*testAsFunction)() ) noexcept;
+
+        void invoke() const override;
+    };
+
+    std::string extractClassName( StringRef const& classOrQualifiedMethodName );
+
+    ///////////////////////////////////////////////////////////////////////////
+
+} // end namespace Catch
+
+// end catch_test_case_registry_impl.h
+// start catch_reporter_registry.h
+
+#include <map>
+
+namespace Catch {
+
+    class ReporterRegistry : public IReporterRegistry {
+
+    public:
+
+        ~ReporterRegistry() override;
+
+        IStreamingReporterPtr create( std::string const& name, IConfigPtr const& config ) const override;
+
+        void registerReporter( std::string const& name, IReporterFactoryPtr const& factory );
+        void registerListener( IReporterFactoryPtr const& factory );
+
+        FactoryMap const& getFactories() const override;
+        Listeners const& getListeners() const override;
+
+    private:
+        FactoryMap m_factories;
+        Listeners m_listeners;
+    };
+}
+
+// end catch_reporter_registry.h
+// start catch_tag_alias_registry.h
+
+// start catch_tag_alias.h
+
+#include <string>
+
+namespace Catch {
+
+    struct TagAlias {
+        TagAlias(std::string const& _tag, SourceLineInfo _lineInfo);
+
+        std::string tag;
+        SourceLineInfo lineInfo;
+    };
+
+} // end namespace Catch
+
+// end catch_tag_alias.h
+#include <map>
+
+namespace Catch {
+
+    class TagAliasRegistry : public ITagAliasRegistry {
+    public:
+        ~TagAliasRegistry() override;
+        TagAlias const* find( std::string const& alias ) const override;
+        std::string expandAliases( std::string const& unexpandedTestSpec ) const override;
+        void add( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo );
+
+    private:
+        std::map<std::string, TagAlias> m_registry;
+    };
+
+} // end namespace Catch
+
+// end catch_tag_alias_registry.h
+// start catch_startup_exception_registry.h
+
+#include <vector>
+#include <exception>
+
+namespace Catch {
+
+    class StartupExceptionRegistry {
+    public:
+        void add(std::exception_ptr const& exception) noexcept;
+        std::vector<std::exception_ptr> const& getExceptions() const noexcept;
+    private:
+        std::vector<std::exception_ptr> m_exceptions;
+    };
+
+} // end namespace Catch
+
+// end catch_startup_exception_registry.h
+// start catch_singletons.hpp
+
+namespace Catch {
+
+    struct ISingleton {
+        virtual ~ISingleton();
+    };
+
+    void addSingleton( ISingleton* singleton );
+    void cleanupSingletons();
+
+    template<typename SingletonImplT, typename InterfaceT = SingletonImplT, typename MutableInterfaceT = InterfaceT>
+    class Singleton : SingletonImplT, public ISingleton {
+
+        static auto getInternal() -> Singleton* {
+            static Singleton* s_instance = nullptr;
+            if( !s_instance ) {
+                s_instance = new Singleton;
+                addSingleton( s_instance );
+            }
+            return s_instance;
+        }
+
+    public:
+        static auto get() -> InterfaceT const& {
+            return *getInternal();
+        }
+        static auto getMutable() -> MutableInterfaceT& {
+            return *getInternal();
+        }
+    };
+
+} // namespace Catch
+
+// end catch_singletons.hpp
+namespace Catch {
+
+    namespace {
+
+        class RegistryHub : public IRegistryHub, public IMutableRegistryHub,
+                            private NonCopyable {
+
+        public: // IRegistryHub
+            RegistryHub() = default;
+            IReporterRegistry const& getReporterRegistry() const override {
+                return m_reporterRegistry;
+            }
+            ITestCaseRegistry const& getTestCaseRegistry() const override {
+                return m_testCaseRegistry;
+            }
+            IExceptionTranslatorRegistry const& getExceptionTranslatorRegistry() const override {
+                return m_exceptionTranslatorRegistry;
+            }
+            ITagAliasRegistry const& getTagAliasRegistry() const override {
+                return m_tagAliasRegistry;
+            }
+            StartupExceptionRegistry const& getStartupExceptionRegistry() const override {
+                return m_exceptionRegistry;
+            }
+
+        public: // IMutableRegistryHub
+            void registerReporter( std::string const& name, IReporterFactoryPtr const& factory ) override {
+                m_reporterRegistry.registerReporter( name, factory );
+            }
+            void registerListener( IReporterFactoryPtr const& factory ) override {
+                m_reporterRegistry.registerListener( factory );
+            }
+            void registerTest( TestCase const& testInfo ) override {
+                m_testCaseRegistry.registerTest( testInfo );
+            }
+            void registerTranslator( const IExceptionTranslator* translator ) override {
+                m_exceptionTranslatorRegistry.registerTranslator( translator );
+            }
+            void registerTagAlias( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo ) override {
+                m_tagAliasRegistry.add( alias, tag, lineInfo );
+            }
+            void registerStartupException() noexcept override {
+                m_exceptionRegistry.add(std::current_exception());
+            }
+
+        private:
+            TestRegistry m_testCaseRegistry;
+            ReporterRegistry m_reporterRegistry;
+            ExceptionTranslatorRegistry m_exceptionTranslatorRegistry;
+            TagAliasRegistry m_tagAliasRegistry;
+            StartupExceptionRegistry m_exceptionRegistry;
+        };
+    }
+
+    using RegistryHubSingleton = Singleton<RegistryHub, IRegistryHub, IMutableRegistryHub>;
+
+    IRegistryHub const& getRegistryHub() {
+        return RegistryHubSingleton::get();
+    }
+    IMutableRegistryHub& getMutableRegistryHub() {
+        return RegistryHubSingleton::getMutable();
+    }
+    void cleanUp() {
+        cleanupSingletons();
+        cleanUpContext();
+    }
+    std::string translateActiveException() {
+        return getRegistryHub().getExceptionTranslatorRegistry().translateActiveException();
+    }
+
+} // end namespace Catch
+// end catch_registry_hub.cpp
+// start catch_reporter_registry.cpp
+
+namespace Catch {
+
+    ReporterRegistry::~ReporterRegistry() = default;
+
+    IStreamingReporterPtr ReporterRegistry::create( std::string const& name, IConfigPtr const& config ) const {
+        auto it =  m_factories.find( name );
+        if( it == m_factories.end() )
+            return nullptr;
+        return it->second->create( ReporterConfig( config ) );
+    }
+
+    void ReporterRegistry::registerReporter( std::string const& name, IReporterFactoryPtr const& factory ) {
+        m_factories.emplace(name, factory);
+    }
+    void ReporterRegistry::registerListener( IReporterFactoryPtr const& factory ) {
+        m_listeners.push_back( factory );
+    }
+
+    IReporterRegistry::FactoryMap const& ReporterRegistry::getFactories() const {
+        return m_factories;
+    }
+    IReporterRegistry::Listeners const& ReporterRegistry::getListeners() const {
+        return m_listeners;
+    }
+
+}
+// end catch_reporter_registry.cpp
+// start catch_result_type.cpp
+
+namespace Catch {
+
+    bool isOk( ResultWas::OfType resultType ) {
+        return ( resultType & ResultWas::FailureBit ) == 0;
+    }
+    bool isJustInfo( int flags ) {
+        return flags == ResultWas::Info;
+    }
+
+    ResultDisposition::Flags operator | ( ResultDisposition::Flags lhs, ResultDisposition::Flags rhs ) {
+        return static_cast<ResultDisposition::Flags>( static_cast<int>( lhs ) | static_cast<int>( rhs ) );
+    }
+
+    bool shouldContinueOnFailure( int flags )    { return ( flags & ResultDisposition::ContinueOnFailure ) != 0; }
+    bool shouldSuppressFailure( int flags )      { return ( flags & ResultDisposition::SuppressFail ) != 0; }
+
+} // end namespace Catch
+// end catch_result_type.cpp
+// start catch_run_context.cpp
+
+#include <cassert>
+#include <algorithm>
+#include <sstream>
+
+namespace Catch {
+
+    namespace Generators {
+        struct GeneratorTracker : TestCaseTracking::TrackerBase, IGeneratorTracker {
+            size_t m_index = static_cast<size_t>( -1 );
+            GeneratorBasePtr m_generator;
+
+            GeneratorTracker( TestCaseTracking::NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent )
+            :   TrackerBase( nameAndLocation, ctx, parent )
+            {}
+            ~GeneratorTracker();
+
+            static GeneratorTracker& acquire( TrackerContext& ctx, TestCaseTracking::NameAndLocation const& nameAndLocation ) {
+                std::shared_ptr<GeneratorTracker> tracker;
+
+                ITracker& currentTracker = ctx.currentTracker();
+                if( TestCaseTracking::ITrackerPtr childTracker = currentTracker.findChild( nameAndLocation ) ) {
+                    assert( childTracker );
+                    assert( childTracker->isIndexTracker() );
+                    tracker = std::static_pointer_cast<GeneratorTracker>( childTracker );
+                }
+                else {
+                    tracker = std::make_shared<GeneratorTracker>( nameAndLocation, ctx, &currentTracker );
+                    currentTracker.addChild( tracker );
+                }
+
+                if( !ctx.completedCycle() && !tracker->isComplete() ) {
+                    if( tracker->m_runState != ExecutingChildren && tracker->m_runState != NeedsAnotherRun )
+                        tracker->moveNext();
+                    tracker->open();
+                }
+
+                return *tracker;
+            }
+
+            void moveNext() {
+                m_index++;
+                m_children.clear();
+            }
+
+            // TrackerBase interface
+            bool isIndexTracker() const override { return true; }
+            auto hasGenerator() const -> bool override {
+                return !!m_generator;
+            }
+            void close() override {
+                TrackerBase::close();
+                if( m_runState == CompletedSuccessfully && m_index < m_generator->size()-1 )
+                    m_runState = Executing;
+            }
+
+            // IGeneratorTracker interface
+            auto getGenerator() const -> GeneratorBasePtr const& override {
+                return m_generator;
+            }
+            void setGenerator( GeneratorBasePtr&& generator ) override {
+                m_generator = std::move( generator );
+            }
+            auto getIndex() const -> size_t override {
+                return m_index;
+            }
+        };
+        GeneratorTracker::~GeneratorTracker() {}
+    }
+
+    RunContext::RunContext(IConfigPtr const& _config, IStreamingReporterPtr&& reporter)
+    :   m_runInfo(_config->name()),
+        m_context(getCurrentMutableContext()),
+        m_config(_config),
+        m_reporter(std::move(reporter)),
+        m_lastAssertionInfo{ StringRef(), SourceLineInfo("",0), StringRef(), ResultDisposition::Normal },
+        m_includeSuccessfulResults( m_config->includeSuccessfulResults() || m_reporter->getPreferences().shouldReportAllAssertions )
+    {
+        m_context.setRunner(this);
+        m_context.setConfig(m_config);
+        m_context.setResultCapture(this);
+        m_reporter->testRunStarting(m_runInfo);
+    }
+
+    RunContext::~RunContext() {
+        m_reporter->testRunEnded(TestRunStats(m_runInfo, m_totals, aborting()));
+    }
+
+    void RunContext::testGroupStarting(std::string const& testSpec, std::size_t groupIndex, std::size_t groupsCount) {
+        m_reporter->testGroupStarting(GroupInfo(testSpec, groupIndex, groupsCount));
+    }
+
+    void RunContext::testGroupEnded(std::string const& testSpec, Totals const& totals, std::size_t groupIndex, std::size_t groupsCount) {
+        m_reporter->testGroupEnded(TestGroupStats(GroupInfo(testSpec, groupIndex, groupsCount), totals, aborting()));
+    }
+
+    Totals RunContext::runTest(TestCase const& testCase) {
+        Totals prevTotals = m_totals;
+
+        std::string redirectedCout;
+        std::string redirectedCerr;
+
+        auto const& testInfo = testCase.getTestCaseInfo();
+
+        m_reporter->testCaseStarting(testInfo);
+
+        m_activeTestCase = &testCase;
+
+        ITracker& rootTracker = m_trackerContext.startRun();
+        assert(rootTracker.isSectionTracker());
+        static_cast<SectionTracker&>(rootTracker).addInitialFilters(m_config->getSectionsToRun());
+        do {
+            m_trackerContext.startCycle();
+            m_testCaseTracker = &SectionTracker::acquire(m_trackerContext, TestCaseTracking::NameAndLocation(testInfo.name, testInfo.lineInfo));
+            runCurrentTest(redirectedCout, redirectedCerr);
+        } while (!m_testCaseTracker->isSuccessfullyCompleted() && !aborting());
+
+        Totals deltaTotals = m_totals.delta(prevTotals);
+        if (testInfo.expectedToFail() && deltaTotals.testCases.passed > 0) {
+            deltaTotals.assertions.failed++;
+            deltaTotals.testCases.passed--;
+            deltaTotals.testCases.failed++;
+        }
+        m_totals.testCases += deltaTotals.testCases;
+        m_reporter->testCaseEnded(TestCaseStats(testInfo,
+                                  deltaTotals,
+                                  redirectedCout,
+                                  redirectedCerr,
+                                  aborting()));
+
+        m_activeTestCase = nullptr;
+        m_testCaseTracker = nullptr;
+
+        return deltaTotals;
+    }
+
+    IConfigPtr RunContext::config() const {
+        return m_config;
+    }
+
+    IStreamingReporter& RunContext::reporter() const {
+        return *m_reporter;
+    }
+
+    void RunContext::assertionEnded(AssertionResult const & result) {
+        if (result.getResultType() == ResultWas::Ok) {
+            m_totals.assertions.passed++;
+            m_lastAssertionPassed = true;
+        } else if (!result.isOk()) {
+            m_lastAssertionPassed = false;
+            if( m_activeTestCase->getTestCaseInfo().okToFail() )
+                m_totals.assertions.failedButOk++;
+            else
+                m_totals.assertions.failed++;
+        }
+        else {
+            m_lastAssertionPassed = true;
+        }
+
+        // We have no use for the return value (whether messages should be cleared), because messages were made scoped
+        // and should be let to clear themselves out.
+        static_cast<void>(m_reporter->assertionEnded(AssertionStats(result, m_messages, m_totals)));
+
+        // Reset working state
+        resetAssertionInfo();
+        m_lastResult = result;
+    }
+    void RunContext::resetAssertionInfo() {
+        m_lastAssertionInfo.macroName = StringRef();
+        m_lastAssertionInfo.capturedExpression = "{Unknown expression after the reported line}"_sr;
+    }
+
+    bool RunContext::sectionStarted(SectionInfo const & sectionInfo, Counts & assertions) {
+        ITracker& sectionTracker = SectionTracker::acquire(m_trackerContext, TestCaseTracking::NameAndLocation(sectionInfo.name, sectionInfo.lineInfo));
+        if (!sectionTracker.isOpen())
+            return false;
+        m_activeSections.push_back(&sectionTracker);
+
+        m_lastAssertionInfo.lineInfo = sectionInfo.lineInfo;
+
+        m_reporter->sectionStarting(sectionInfo);
+
+        assertions = m_totals.assertions;
+
+        return true;
+    }
+    auto RunContext::acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker& {
+        using namespace Generators;
+        GeneratorTracker& tracker = GeneratorTracker::acquire( m_trackerContext, TestCaseTracking::NameAndLocation( "generator", lineInfo ) );
+        assert( tracker.isOpen() );
+        m_lastAssertionInfo.lineInfo = lineInfo;
+        return tracker;
+    }
+
+    bool RunContext::testForMissingAssertions(Counts& assertions) {
+        if (assertions.total() != 0)
+            return false;
+        if (!m_config->warnAboutMissingAssertions())
+            return false;
+        if (m_trackerContext.currentTracker().hasChildren())
+            return false;
+        m_totals.assertions.failed++;
+        assertions.failed++;
+        return true;
+    }
+
+    void RunContext::sectionEnded(SectionEndInfo const & endInfo) {
+        Counts assertions = m_totals.assertions - endInfo.prevAssertions;
+        bool missingAssertions = testForMissingAssertions(assertions);
+
+        if (!m_activeSections.empty()) {
+            m_activeSections.back()->close();
+            m_activeSections.pop_back();
+        }
+
+        m_reporter->sectionEnded(SectionStats(endInfo.sectionInfo, assertions, endInfo.durationInSeconds, missingAssertions));
+        m_messages.clear();
+    }
+
+    void RunContext::sectionEndedEarly(SectionEndInfo const & endInfo) {
+        if (m_unfinishedSections.empty())
+            m_activeSections.back()->fail();
+        else
+            m_activeSections.back()->close();
+        m_activeSections.pop_back();
+
+        m_unfinishedSections.push_back(endInfo);
+    }
+    void RunContext::benchmarkStarting( BenchmarkInfo const& info ) {
+        m_reporter->benchmarkStarting( info );
+    }
+    void RunContext::benchmarkEnded( BenchmarkStats const& stats ) {
+        m_reporter->benchmarkEnded( stats );
+    }
+
+    void RunContext::pushScopedMessage(MessageInfo const & message) {
+        m_messages.push_back(message);
+    }
+
+    void RunContext::popScopedMessage(MessageInfo const & message) {
+        m_messages.erase(std::remove(m_messages.begin(), m_messages.end(), message), m_messages.end());
+    }
+
+    std::string RunContext::getCurrentTestName() const {
+        return m_activeTestCase
+            ? m_activeTestCase->getTestCaseInfo().name
+            : std::string();
+    }
+
+    const AssertionResult * RunContext::getLastResult() const {
+        return &(*m_lastResult);
+    }
+
+    void RunContext::exceptionEarlyReported() {
+        m_shouldReportUnexpected = false;
+    }
+
+    void RunContext::handleFatalErrorCondition( StringRef message ) {
+        // First notify reporter that bad things happened
+        m_reporter->fatalErrorEncountered(message);
+
+        // Don't rebuild the result -- the stringification itself can cause more fatal errors
+        // Instead, fake a result data.
+        AssertionResultData tempResult( ResultWas::FatalErrorCondition, { false } );
+        tempResult.message = message;
+        AssertionResult result(m_lastAssertionInfo, tempResult);
+
+        assertionEnded(result);
+
+        handleUnfinishedSections();
+
+        // Recreate section for test case (as we will lose the one that was in scope)
+        auto const& testCaseInfo = m_activeTestCase->getTestCaseInfo();
+        SectionInfo testCaseSection(testCaseInfo.lineInfo, testCaseInfo.name);
+
+        Counts assertions;
+        assertions.failed = 1;
+        SectionStats testCaseSectionStats(testCaseSection, assertions, 0, false);
+        m_reporter->sectionEnded(testCaseSectionStats);
+
+        auto const& testInfo = m_activeTestCase->getTestCaseInfo();
+
+        Totals deltaTotals;
+        deltaTotals.testCases.failed = 1;
+        deltaTotals.assertions.failed = 1;
+        m_reporter->testCaseEnded(TestCaseStats(testInfo,
+                                  deltaTotals,
+                                  std::string(),
+                                  std::string(),
+                                  false));
+        m_totals.testCases.failed++;
+        testGroupEnded(std::string(), m_totals, 1, 1);
+        m_reporter->testRunEnded(TestRunStats(m_runInfo, m_totals, false));
+    }
+
+    bool RunContext::lastAssertionPassed() {
+         return m_lastAssertionPassed;
+    }
+
+    void RunContext::assertionPassed() {
+        m_lastAssertionPassed = true;
+        ++m_totals.assertions.passed;
+        resetAssertionInfo();
+    }
+
+    bool RunContext::aborting() const {
+        return m_totals.assertions.failed >= static_cast<std::size_t>(m_config->abortAfter());
+    }
+
+    void RunContext::runCurrentTest(std::string & redirectedCout, std::string & redirectedCerr) {
+        auto const& testCaseInfo = m_activeTestCase->getTestCaseInfo();
+        SectionInfo testCaseSection(testCaseInfo.lineInfo, testCaseInfo.name);
+        m_reporter->sectionStarting(testCaseSection);
+        Counts prevAssertions = m_totals.assertions;
+        double duration = 0;
+        m_shouldReportUnexpected = true;
+        m_lastAssertionInfo = { "TEST_CASE"_sr, testCaseInfo.lineInfo, StringRef(), ResultDisposition::Normal };
+
+        seedRng(*m_config);
+
+        Timer timer;
+        CATCH_TRY {
+            if (m_reporter->getPreferences().shouldRedirectStdOut) {
+#if !defined(CATCH_CONFIG_EXPERIMENTAL_REDIRECT)
+                RedirectedStdOut redirectedStdOut;
+                RedirectedStdErr redirectedStdErr;
+
+                timer.start();
+                invokeActiveTestCase();
+                redirectedCout += redirectedStdOut.str();
+                redirectedCerr += redirectedStdErr.str();
+#else
+                OutputRedirect r(redirectedCout, redirectedCerr);
+                timer.start();
+                invokeActiveTestCase();
+#endif
+            } else {
+                timer.start();
+                invokeActiveTestCase();
+            }
+            duration = timer.getElapsedSeconds();
+        } CATCH_CATCH_ANON (TestFailureException&) {
+            // This just means the test was aborted due to failure
+        } CATCH_CATCH_ALL {
+            // Under CATCH_CONFIG_FAST_COMPILE, unexpected exceptions under REQUIRE assertions
+            // are reported without translation at the point of origin.
+            if( m_shouldReportUnexpected ) {
+                AssertionReaction dummyReaction;
+                handleUnexpectedInflightException( m_lastAssertionInfo, translateActiveException(), dummyReaction );
+            }
+        }
+        Counts assertions = m_totals.assertions - prevAssertions;
+        bool missingAssertions = testForMissingAssertions(assertions);
+
+        m_testCaseTracker->close();
+        handleUnfinishedSections();
+        m_messages.clear();
+
+        SectionStats testCaseSectionStats(testCaseSection, assertions, duration, missingAssertions);
+        m_reporter->sectionEnded(testCaseSectionStats);
+    }
+
+    void RunContext::invokeActiveTestCase() {
+        FatalConditionHandler fatalConditionHandler; // Handle signals
+        m_activeTestCase->invoke();
+        fatalConditionHandler.reset();
+    }
+
+    void RunContext::handleUnfinishedSections() {
+        // If sections ended prematurely due to an exception we stored their
+        // infos here so we can tear them down outside the unwind process.
+        for (auto it = m_unfinishedSections.rbegin(),
+             itEnd = m_unfinishedSections.rend();
+             it != itEnd;
+             ++it)
+            sectionEnded(*it);
+        m_unfinishedSections.clear();
+    }
+
+    void RunContext::handleExpr(
+        AssertionInfo const& info,
+        ITransientExpression const& expr,
+        AssertionReaction& reaction
+    ) {
+        m_reporter->assertionStarting( info );
+
+        bool negated = isFalseTest( info.resultDisposition );
+        bool result = expr.getResult() != negated;
+
+        if( result ) {
+            if (!m_includeSuccessfulResults) {
+                assertionPassed();
+            }
+            else {
+                reportExpr(info, ResultWas::Ok, &expr, negated);
+            }
+        }
+        else {
+            reportExpr(info, ResultWas::ExpressionFailed, &expr, negated );
+            populateReaction( reaction );
+        }
+    }
+    void RunContext::reportExpr(
+            AssertionInfo const &info,
+            ResultWas::OfType resultType,
+            ITransientExpression const *expr,
+            bool negated ) {
+
+        m_lastAssertionInfo = info;
+        AssertionResultData data( resultType, LazyExpression( negated ) );
+
+        AssertionResult assertionResult{ info, data };
+        assertionResult.m_resultData.lazyExpression.m_transientExpression = expr;
+
+        assertionEnded( assertionResult );
+    }
+
+    void RunContext::handleMessage(
+            AssertionInfo const& info,
+            ResultWas::OfType resultType,
+            StringRef const& message,
+            AssertionReaction& reaction
+    ) {
+        m_reporter->assertionStarting( info );
+
+        m_lastAssertionInfo = info;
+
+        AssertionResultData data( resultType, LazyExpression( false ) );
+        data.message = message;
+        AssertionResult assertionResult{ m_lastAssertionInfo, data };
+        assertionEnded( assertionResult );
+        if( !assertionResult.isOk() )
+            populateReaction( reaction );
+    }
+    void RunContext::handleUnexpectedExceptionNotThrown(
+            AssertionInfo const& info,
+            AssertionReaction& reaction
+    ) {
+        handleNonExpr(info, Catch::ResultWas::DidntThrowException, reaction);
+    }
+
+    void RunContext::handleUnexpectedInflightException(
+            AssertionInfo const& info,
+            std::string const& message,
+            AssertionReaction& reaction
+    ) {
+        m_lastAssertionInfo = info;
+
+        AssertionResultData data( ResultWas::ThrewException, LazyExpression( false ) );
+        data.message = message;
+        AssertionResult assertionResult{ info, data };
+        assertionEnded( assertionResult );
+        populateReaction( reaction );
+    }
+
+    void RunContext::populateReaction( AssertionReaction& reaction ) {
+        reaction.shouldDebugBreak = m_config->shouldDebugBreak();
+        reaction.shouldThrow = aborting() || (m_lastAssertionInfo.resultDisposition & ResultDisposition::Normal);
+    }
+
+    void RunContext::handleIncomplete(
+            AssertionInfo const& info
+    ) {
+        m_lastAssertionInfo = info;
+
+        AssertionResultData data( ResultWas::ThrewException, LazyExpression( false ) );
+        data.message = "Exception translation was disabled by CATCH_CONFIG_FAST_COMPILE";
+        AssertionResult assertionResult{ info, data };
+        assertionEnded( assertionResult );
+    }
+    void RunContext::handleNonExpr(
+            AssertionInfo const &info,
+            ResultWas::OfType resultType,
+            AssertionReaction &reaction
+    ) {
+        m_lastAssertionInfo = info;
+
+        AssertionResultData data( resultType, LazyExpression( false ) );
+        AssertionResult assertionResult{ info, data };
+        assertionEnded( assertionResult );
+
+        if( !assertionResult.isOk() )
+            populateReaction( reaction );
+    }
+
+    IResultCapture& getResultCapture() {
+        if (auto* capture = getCurrentContext().getResultCapture())
+            return *capture;
+        else
+            CATCH_INTERNAL_ERROR("No result capture instance");
+    }
+}
+// end catch_run_context.cpp
+// start catch_section.cpp
+
+namespace Catch {
+
+    Section::Section( SectionInfo const& info )
+    :   m_info( info ),
+        m_sectionIncluded( getResultCapture().sectionStarted( m_info, m_assertions ) )
+    {
+        m_timer.start();
+    }
+
+    Section::~Section() {
+        if( m_sectionIncluded ) {
+            SectionEndInfo endInfo{ m_info, m_assertions, m_timer.getElapsedSeconds() };
+            if( uncaught_exceptions() )
+                getResultCapture().sectionEndedEarly( endInfo );
+            else
+                getResultCapture().sectionEnded( endInfo );
+        }
+    }
+
+    // This indicates whether the section should be executed or not
+    Section::operator bool() const {
+        return m_sectionIncluded;
+    }
+
+} // end namespace Catch
+// end catch_section.cpp
+// start catch_section_info.cpp
+
+namespace Catch {
+
+    SectionInfo::SectionInfo
+        (   SourceLineInfo const& _lineInfo,
+            std::string const& _name )
+    :   name( _name ),
+        lineInfo( _lineInfo )
+    {}
+
+} // end namespace Catch
+// end catch_section_info.cpp
+// start catch_session.cpp
+
+// start catch_session.h
+
+#include <memory>
+
+namespace Catch {
+
+    class Session : NonCopyable {
+    public:
+
+        Session();
+        ~Session() override;
+
+        void showHelp() const;
+        void libIdentify();
+
+        int applyCommandLine( int argc, char const * const * argv );
+    #if defined(CATCH_CONFIG_WCHAR) && defined(WIN32) && defined(UNICODE)
+        int applyCommandLine( int argc, wchar_t const * const * argv );
+    #endif
+
+        void useConfigData( ConfigData const& configData );
+
+        template<typename CharT>
+        int run(int argc, CharT const * const argv[]) {
+            if (m_startupExceptions)
+                return 1;
+            int returnCode = applyCommandLine(argc, argv);
+            if (returnCode == 0)
+                returnCode = run();
+            return returnCode;
+        }
+
+        int run();
+
+        clara::Parser const& cli() const;
+        void cli( clara::Parser const& newParser );
+        ConfigData& configData();
+        Config& config();
+    private:
+        int runInternal();
+
+        clara::Parser m_cli;
+        ConfigData m_configData;
+        std::shared_ptr<Config> m_config;
+        bool m_startupExceptions = false;
+    };
+
+} // end namespace Catch
+
+// end catch_session.h
+// start catch_version.h
+
+#include <iosfwd>
+
+namespace Catch {
+
+    // Versioning information
+    struct Version {
+        Version( Version const& ) = delete;
+        Version& operator=( Version const& ) = delete;
+        Version(    unsigned int _majorVersion,
+                    unsigned int _minorVersion,
+                    unsigned int _patchNumber,
+                    char const * const _branchName,
+                    unsigned int _buildNumber );
+
+        unsigned int const majorVersion;
+        unsigned int const minorVersion;
+        unsigned int const patchNumber;
+
+        // buildNumber is only used if branchName is not null
+        char const * const branchName;
+        unsigned int const buildNumber;
+
+        friend std::ostream& operator << ( std::ostream& os, Version const& version );
+    };
+
+    Version const& libraryVersion();
+}
+
+// end catch_version.h
+#include <cstdlib>
+#include <iomanip>
+
+namespace Catch {
+
+    namespace {
+        const int MaxExitCode = 255;
+
+        IStreamingReporterPtr createReporter(std::string const& reporterName, IConfigPtr const& config) {
+            auto reporter = Catch::getRegistryHub().getReporterRegistry().create(reporterName, config);
+            CATCH_ENFORCE(reporter, "No reporter registered with name: '" << reporterName << "'");
+
+            return reporter;
+        }
+
+        IStreamingReporterPtr makeReporter(std::shared_ptr<Config> const& config) {
+            if (Catch::getRegistryHub().getReporterRegistry().getListeners().empty()) {
+                return createReporter(config->getReporterName(), config);
+            }
+
+            auto multi = std::unique_ptr<ListeningReporter>(new ListeningReporter);
+
+            auto const& listeners = Catch::getRegistryHub().getReporterRegistry().getListeners();
+            for (auto const& listener : listeners) {
+                multi->addListener(listener->create(Catch::ReporterConfig(config)));
+            }
+            multi->addReporter(createReporter(config->getReporterName(), config));
+            return std::move(multi);
+        }
+
+        Catch::Totals runTests(std::shared_ptr<Config> const& config) {
+            auto reporter = makeReporter(config);
+
+            RunContext context(config, std::move(reporter));
+
+            Totals totals;
+
+            context.testGroupStarting(config->name(), 1, 1);
+
+            TestSpec testSpec = config->testSpec();
+
+            auto const& allTestCases = getAllTestCasesSorted(*config);
+            for (auto const& testCase : allTestCases) {
+                if (!context.aborting() && matchTest(testCase, testSpec, *config))
+                    totals += context.runTest(testCase);
+                else
+                    context.reporter().skipTest(testCase);
+            }
+
+            if (config->warnAboutNoTests() && totals.testCases.total() == 0) {
+                ReusableStringStream testConfig;
+
+                bool first = true;
+                for (const auto& input : config->getTestsOrTags()) {
+                    if (!first) { testConfig << ' '; }
+                    first = false;
+                    testConfig << input;
+                }
+
+                context.reporter().noMatchingTestCases(testConfig.str());
+                totals.error = -1;
+            }
+
+            context.testGroupEnded(config->name(), totals, 1, 1);
+            return totals;
+        }
+
+        void applyFilenamesAsTags(Catch::IConfig const& config) {
+            auto& tests = const_cast<std::vector<TestCase>&>(getAllTestCasesSorted(config));
+            for (auto& testCase : tests) {
+                auto tags = testCase.tags;
+
+                std::string filename = testCase.lineInfo.file;
+                auto lastSlash = filename.find_last_of("\\/");
+                if (lastSlash != std::string::npos) {
+                    filename.erase(0, lastSlash);
+                    filename[0] = '#';
+                }
+
+                auto lastDot = filename.find_last_of('.');
+                if (lastDot != std::string::npos) {
+                    filename.erase(lastDot);
+                }
+
+                tags.push_back(std::move(filename));
+                setTags(testCase, tags);
+            }
+        }
+
+    } // anon namespace
+
+    Session::Session() {
+        static bool alreadyInstantiated = false;
+        if( alreadyInstantiated ) {
+            CATCH_TRY { CATCH_INTERNAL_ERROR( "Only one instance of Catch::Session can ever be used" ); }
+            CATCH_CATCH_ALL { getMutableRegistryHub().registerStartupException(); }
+        }
+
+        // There cannot be exceptions at startup in no-exception mode.
+#if !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+        const auto& exceptions = getRegistryHub().getStartupExceptionRegistry().getExceptions();
+        if ( !exceptions.empty() ) {
+            m_startupExceptions = true;
+            Colour colourGuard( Colour::Red );
+            Catch::cerr() << "Errors occurred during startup!" << '\n';
+            // iterate over all exceptions and notify user
+            for ( const auto& ex_ptr : exceptions ) {
+                try {
+                    std::rethrow_exception(ex_ptr);
+                } catch ( std::exception const& ex ) {
+                    Catch::cerr() << Column( ex.what() ).indent(2) << '\n';
+                }
+            }
+        }
+#endif
+
+        alreadyInstantiated = true;
+        m_cli = makeCommandLineParser( m_configData );
+    }
+    Session::~Session() {
+        Catch::cleanUp();
+    }
+
+    void Session::showHelp() const {
+        Catch::cout()
+                << "\nCatch v" << libraryVersion() << "\n"
+                << m_cli << std::endl
+                << "For more detailed usage please see the project docs\n" << std::endl;
+    }
+    void Session::libIdentify() {
+        Catch::cout()
+                << std::left << std::setw(16) << "description: " << "A Catch test executable\n"
+                << std::left << std::setw(16) << "category: " << "testframework\n"
+                << std::left << std::setw(16) << "framework: " << "Catch Test\n"
+                << std::left << std::setw(16) << "version: " << libraryVersion() << std::endl;
+    }
+
+    int Session::applyCommandLine( int argc, char const * const * argv ) {
+        if( m_startupExceptions )
+            return 1;
+
+        auto result = m_cli.parse( clara::Args( argc, argv ) );
+        if( !result ) {
+            Catch::cerr()
+                << Colour( Colour::Red )
+                << "\nError(s) in input:\n"
+                << Column( result.errorMessage() ).indent( 2 )
+                << "\n\n";
+            Catch::cerr() << "Run with -? for usage\n" << std::endl;
+            return MaxExitCode;
+        }
+
+        if( m_configData.showHelp )
+            showHelp();
+        if( m_configData.libIdentify )
+            libIdentify();
+        m_config.reset();
+        return 0;
+    }
+
+#if defined(CATCH_CONFIG_WCHAR) && defined(WIN32) && defined(UNICODE)
+    int Session::applyCommandLine( int argc, wchar_t const * const * argv ) {
+
+        char **utf8Argv = new char *[ argc ];
+
+        for ( int i = 0; i < argc; ++i ) {
+            int bufSize = WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, NULL, 0, NULL, NULL );
+
+            utf8Argv[ i ] = new char[ bufSize ];
+
+            WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, utf8Argv[i], bufSize, NULL, NULL );
+        }
+
+        int returnCode = applyCommandLine( argc, utf8Argv );
+
+        for ( int i = 0; i < argc; ++i )
+            delete [] utf8Argv[ i ];
+
+        delete [] utf8Argv;
+
+        return returnCode;
+    }
+#endif
+
+    void Session::useConfigData( ConfigData const& configData ) {
+        m_configData = configData;
+        m_config.reset();
+    }
+
+    int Session::run() {
+        if( ( m_configData.waitForKeypress & WaitForKeypress::BeforeStart ) != 0 ) {
+            Catch::cout() << "...waiting for enter/ return before starting" << std::endl;
+            static_cast<void>(std::getchar());
+        }
+        int exitCode = runInternal();
+        if( ( m_configData.waitForKeypress & WaitForKeypress::BeforeExit ) != 0 ) {
+            Catch::cout() << "...waiting for enter/ return before exiting, with code: " << exitCode << std::endl;
+            static_cast<void>(std::getchar());
+        }
+        return exitCode;
+    }
+
+    clara::Parser const& Session::cli() const {
+        return m_cli;
+    }
+    void Session::cli( clara::Parser const& newParser ) {
+        m_cli = newParser;
+    }
+    ConfigData& Session::configData() {
+        return m_configData;
+    }
+    Config& Session::config() {
+        if( !m_config )
+            m_config = std::make_shared<Config>( m_configData );
+        return *m_config;
+    }
+
+    int Session::runInternal() {
+        if( m_startupExceptions )
+            return 1;
+
+        if (m_configData.showHelp || m_configData.libIdentify) {
+            return 0;
+        }
+
+        CATCH_TRY {
+            config(); // Force config to be constructed
+
+            seedRng( *m_config );
+
+            if( m_configData.filenamesAsTags )
+                applyFilenamesAsTags( *m_config );
+
+            // Handle list request
+            if( Option<std::size_t> listed = list( config() ) )
+                return static_cast<int>( *listed );
+
+            auto totals = runTests( m_config );
+            // Note that on unices only the lower 8 bits are usually used, clamping
+            // the return value to 255 prevents false negative when some multiple
+            // of 256 tests has failed
+            return (std::min) (MaxExitCode, (std::max) (totals.error, static_cast<int>(totals.assertions.failed)));
+        }
+#if !defined(CATCH_CONFIG_DISABLE_EXCEPTIONS)
+        catch( std::exception& ex ) {
+            Catch::cerr() << ex.what() << std::endl;
+            return MaxExitCode;
+        }
+#endif
+    }
+
+} // end namespace Catch
+// end catch_session.cpp
+// start catch_singletons.cpp
+
+#include <vector>
+
+namespace Catch {
+
+    namespace {
+        static auto getSingletons() -> std::vector<ISingleton*>*& {
+            static std::vector<ISingleton*>* g_singletons = nullptr;
+            if( !g_singletons )
+                g_singletons = new std::vector<ISingleton*>();
+            return g_singletons;
+        }
+    }
+
+    ISingleton::~ISingleton() {}
+
+    void addSingleton(ISingleton* singleton ) {
+        getSingletons()->push_back( singleton );
+    }
+    void cleanupSingletons() {
+        auto& singletons = getSingletons();
+        for( auto singleton : *singletons )
+            delete singleton;
+        delete singletons;
+        singletons = nullptr;
+    }
+
+} // namespace Catch
+// end catch_singletons.cpp
+// start catch_startup_exception_registry.cpp
+
+namespace Catch {
+void StartupExceptionRegistry::add( std::exception_ptr const& exception ) noexcept {
+        CATCH_TRY {
+            m_exceptions.push_back(exception);
+        } CATCH_CATCH_ALL {
+            // If we run out of memory during start-up there's really not a lot more we can do about it
+            std::terminate();
+        }
+    }
+
+    std::vector<std::exception_ptr> const& StartupExceptionRegistry::getExceptions() const noexcept {
+        return m_exceptions;
+    }
+
+} // end namespace Catch
+// end catch_startup_exception_registry.cpp
+// start catch_stream.cpp
+
+#include <cstdio>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <vector>
+#include <memory>
+
+namespace Catch {
+
+    Catch::IStream::~IStream() = default;
+
+    namespace detail { namespace {
+        template<typename WriterF, std::size_t bufferSize=256>
+        class StreamBufImpl : public std::streambuf {
+            char data[bufferSize];
+            WriterF m_writer;
+
+        public:
+            StreamBufImpl() {
+                setp( data, data + sizeof(data) );
+            }
+
+            ~StreamBufImpl() noexcept {
+                StreamBufImpl::sync();
+            }
+
+        private:
+            int overflow( int c ) override {
+                sync();
+
+                if( c != EOF ) {
+                    if( pbase() == epptr() )
+                        m_writer( std::string( 1, static_cast<char>( c ) ) );
+                    else
+                        sputc( static_cast<char>( c ) );
+                }
+                return 0;
+            }
+
+            int sync() override {
+                if( pbase() != pptr() ) {
+                    m_writer( std::string( pbase(), static_cast<std::string::size_type>( pptr() - pbase() ) ) );
+                    setp( pbase(), epptr() );
+                }
+                return 0;
+            }
+        };
+
+        ///////////////////////////////////////////////////////////////////////////
+
+        struct OutputDebugWriter {
+
+            void operator()( std::string const&str ) {
+                writeToDebugConsole( str );
+            }
+        };
+
+        ///////////////////////////////////////////////////////////////////////////
+
+        class FileStream : public IStream {
+            mutable std::ofstream m_ofs;
+        public:
+            FileStream( StringRef filename ) {
+                m_ofs.open( filename.c_str() );
+                CATCH_ENFORCE( !m_ofs.fail(), "Unable to open file: '" << filename << "'" );
+            }
+            ~FileStream() override = default;
+        public: // IStream
+            std::ostream& stream() const override {
+                return m_ofs;
+            }
+        };
+
+        ///////////////////////////////////////////////////////////////////////////
+
+        class CoutStream : public IStream {
+            mutable std::ostream m_os;
+        public:
+            // Store the streambuf from cout up-front because
+            // cout may get redirected when running tests
+            CoutStream() : m_os( Catch::cout().rdbuf() ) {}
+            ~CoutStream() override = default;
+
+        public: // IStream
+            std::ostream& stream() const override { return m_os; }
+        };
+
+        ///////////////////////////////////////////////////////////////////////////
+
+        class DebugOutStream : public IStream {
+            std::unique_ptr<StreamBufImpl<OutputDebugWriter>> m_streamBuf;
+            mutable std::ostream m_os;
+        public:
+            DebugOutStream()
+            :   m_streamBuf( new StreamBufImpl<OutputDebugWriter>() ),
+                m_os( m_streamBuf.get() )
+            {}
+
+            ~DebugOutStream() override = default;
+
+        public: // IStream
+            std::ostream& stream() const override { return m_os; }
+        };
+
+    }} // namespace anon::detail
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    auto makeStream( StringRef const &filename ) -> IStream const* {
+        if( filename.empty() )
+            return new detail::CoutStream();
+        else if( filename[0] == '%' ) {
+            if( filename == "%debug" )
+                return new detail::DebugOutStream();
+            else
+                CATCH_ERROR( "Unrecognised stream: '" << filename << "'" );
+        }
+        else
+            return new detail::FileStream( filename );
+    }
+
+    // This class encapsulates the idea of a pool of ostringstreams that can be reused.
+    struct StringStreams {
+        std::vector<std::unique_ptr<std::ostringstream>> m_streams;
+        std::vector<std::size_t> m_unused;
+        std::ostringstream m_referenceStream; // Used for copy state/ flags from
+
+        auto add() -> std::size_t {
+            if( m_unused.empty() ) {
+                m_streams.push_back( std::unique_ptr<std::ostringstream>( new std::ostringstream ) );
+                return m_streams.size()-1;
+            }
+            else {
+                auto index = m_unused.back();
+                m_unused.pop_back();
+                return index;
+            }
+        }
+
+        void release( std::size_t index ) {
+            m_streams[index]->copyfmt( m_referenceStream ); // Restore initial flags and other state
+            m_unused.push_back(index);
+        }
+    };
+
+    ReusableStringStream::ReusableStringStream()
+    :   m_index( Singleton<StringStreams>::getMutable().add() ),
+        m_oss( Singleton<StringStreams>::getMutable().m_streams[m_index].get() )
+    {}
+
+    ReusableStringStream::~ReusableStringStream() {
+        static_cast<std::ostringstream*>( m_oss )->str("");
+        m_oss->clear();
+        Singleton<StringStreams>::getMutable().release( m_index );
+    }
+
+    auto ReusableStringStream::str() const -> std::string {
+        return static_cast<std::ostringstream*>( m_oss )->str();
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+
+#ifndef CATCH_CONFIG_NOSTDOUT // If you #define this you must implement these functions
+    std::ostream& cout() { return std::cout; }
+    std::ostream& cerr() { return std::cerr; }
+    std::ostream& clog() { return std::clog; }
+#endif
+}
+// end catch_stream.cpp
+// start catch_string_manip.cpp
+
+#include <algorithm>
+#include <ostream>
+#include <cstring>
+#include <cctype>
+
+namespace Catch {
+
+    namespace {
+        char toLowerCh(char c) {
+            return static_cast<char>( std::tolower( c ) );
+        }
+    }
+
+    bool startsWith( std::string const& s, std::string const& prefix ) {
+        return s.size() >= prefix.size() && std::equal(prefix.begin(), prefix.end(), s.begin());
+    }
+    bool startsWith( std::string const& s, char prefix ) {
+        return !s.empty() && s[0] == prefix;
+    }
+    bool endsWith( std::string const& s, std::string const& suffix ) {
+        return s.size() >= suffix.size() && std::equal(suffix.rbegin(), suffix.rend(), s.rbegin());
+    }
+    bool endsWith( std::string const& s, char suffix ) {
+        return !s.empty() && s[s.size()-1] == suffix;
+    }
+    bool contains( std::string const& s, std::string const& infix ) {
+        return s.find( infix ) != std::string::npos;
+    }
+    void toLowerInPlace( std::string& s ) {
+        std::transform( s.begin(), s.end(), s.begin(), toLowerCh );
+    }
+    std::string toLower( std::string const& s ) {
+        std::string lc = s;
+        toLowerInPlace( lc );
+        return lc;
+    }
+    std::string trim( std::string const& str ) {
+        static char const* whitespaceChars = "\n\r\t ";
+        std::string::size_type start = str.find_first_not_of( whitespaceChars );
+        std::string::size_type end = str.find_last_not_of( whitespaceChars );
+
+        return start != std::string::npos ? str.substr( start, 1+end-start ) : std::string();
+    }
+
+    bool replaceInPlace( std::string& str, std::string const& replaceThis, std::string const& withThis ) {
+        bool replaced = false;
+        std::size_t i = str.find( replaceThis );
+        while( i != std::string::npos ) {
+            replaced = true;
+            str = str.substr( 0, i ) + withThis + str.substr( i+replaceThis.size() );
+            if( i < str.size()-withThis.size() )
+                i = str.find( replaceThis, i+withThis.size() );
+            else
+                i = std::string::npos;
+        }
+        return replaced;
+    }
+
+    pluralise::pluralise( std::size_t count, std::string const& label )
+    :   m_count( count ),
+        m_label( label )
+    {}
+
+    std::ostream& operator << ( std::ostream& os, pluralise const& pluraliser ) {
+        os << pluraliser.m_count << ' ' << pluraliser.m_label;
+        if( pluraliser.m_count != 1 )
+            os << 's';
+        return os;
+    }
+
+}
+// end catch_string_manip.cpp
+// start catch_stringref.cpp
+
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wexit-time-destructors"
+#endif
+
+#include <ostream>
+#include <cstring>
+#include <cstdint>
+
+namespace {
+    const uint32_t byte_2_lead = 0xC0;
+    const uint32_t byte_3_lead = 0xE0;
+    const uint32_t byte_4_lead = 0xF0;
+}
+
+namespace Catch {
+    StringRef::StringRef( char const* rawChars ) noexcept
+    : StringRef( rawChars, static_cast<StringRef::size_type>(std::strlen(rawChars) ) )
+    {}
+
+    StringRef::operator std::string() const {
+        return std::string( m_start, m_size );
+    }
+
+    void StringRef::swap( StringRef& other ) noexcept {
+        std::swap( m_start, other.m_start );
+        std::swap( m_size, other.m_size );
+        std::swap( m_data, other.m_data );
+    }
+
+    auto StringRef::c_str() const -> char const* {
+        if( isSubstring() )
+           const_cast<StringRef*>( this )->takeOwnership();
+        return m_start;
+    }
+    auto StringRef::currentData() const noexcept -> char const* {
+        return m_start;
+    }
+
+    auto StringRef::isOwned() const noexcept -> bool {
+        return m_data != nullptr;
+    }
+    auto StringRef::isSubstring() const noexcept -> bool {
+        return m_start[m_size] != '\0';
+    }
+
+    void StringRef::takeOwnership() {
+        if( !isOwned() ) {
+            m_data = new char[m_size+1];
+            memcpy( m_data, m_start, m_size );
+            m_data[m_size] = '\0';
+            m_start = m_data;
+        }
+    }
+    auto StringRef::substr( size_type start, size_type size ) const noexcept -> StringRef {
+        if( start < m_size )
+            return StringRef( m_start+start, size );
+        else
+            return StringRef();
+    }
+    auto StringRef::operator == ( StringRef const& other ) const noexcept -> bool {
+        return
+            size() == other.size() &&
+            (std::strncmp( m_start, other.m_start, size() ) == 0);
+    }
+    auto StringRef::operator != ( StringRef const& other ) const noexcept -> bool {
+        return !operator==( other );
+    }
+
+    auto StringRef::operator[](size_type index) const noexcept -> char {
+        return m_start[index];
+    }
+
+    auto StringRef::numberOfCharacters() const noexcept -> size_type {
+        size_type noChars = m_size;
+        // Make adjustments for uft encodings
+        for( size_type i=0; i < m_size; ++i ) {
+            char c = m_start[i];
+            if( ( c & byte_2_lead ) == byte_2_lead ) {
+                noChars--;
+                if (( c & byte_3_lead ) == byte_3_lead )
+                    noChars--;
+                if( ( c & byte_4_lead ) == byte_4_lead )
+                    noChars--;
+            }
+        }
+        return noChars;
+    }
+
+    auto operator + ( StringRef const& lhs, StringRef const& rhs ) -> std::string {
+        std::string str;
+        str.reserve( lhs.size() + rhs.size() );
+        str += lhs;
+        str += rhs;
+        return str;
+    }
+    auto operator + ( StringRef const& lhs, const char* rhs ) -> std::string {
+        return std::string( lhs ) + std::string( rhs );
+    }
+    auto operator + ( char const* lhs, StringRef const& rhs ) -> std::string {
+        return std::string( lhs ) + std::string( rhs );
+    }
+
+    auto operator << ( std::ostream& os, StringRef const& str ) -> std::ostream& {
+        return os.write(str.currentData(), str.size());
+    }
+
+    auto operator+=( std::string& lhs, StringRef const& rhs ) -> std::string& {
+        lhs.append(rhs.currentData(), rhs.size());
+        return lhs;
+    }
+
+} // namespace Catch
+
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#endif
+// end catch_stringref.cpp
+// start catch_tag_alias.cpp
+
+namespace Catch {
+    TagAlias::TagAlias(std::string const & _tag, SourceLineInfo _lineInfo): tag(_tag), lineInfo(_lineInfo) {}
+}
+// end catch_tag_alias.cpp
+// start catch_tag_alias_autoregistrar.cpp
+
+namespace Catch {
+
+    RegistrarForTagAliases::RegistrarForTagAliases(char const* alias, char const* tag, SourceLineInfo const& lineInfo) {
+        CATCH_TRY {
+            getMutableRegistryHub().registerTagAlias(alias, tag, lineInfo);
+        } CATCH_CATCH_ALL {
+            // Do not throw when constructing global objects, instead register the exception to be processed later
+            getMutableRegistryHub().registerStartupException();
+        }
+    }
+
+}
+// end catch_tag_alias_autoregistrar.cpp
+// start catch_tag_alias_registry.cpp
+
+#include <sstream>
+
+namespace Catch {
+
+    TagAliasRegistry::~TagAliasRegistry() {}
+
+    TagAlias const* TagAliasRegistry::find( std::string const& alias ) const {
+        auto it = m_registry.find( alias );
+        if( it != m_registry.end() )
+            return &(it->second);
+        else
+            return nullptr;
+    }
+
+    std::string TagAliasRegistry::expandAliases( std::string const& unexpandedTestSpec ) const {
+        std::string expandedTestSpec = unexpandedTestSpec;
+        for( auto const& registryKvp : m_registry ) {
+            std::size_t pos = expandedTestSpec.find( registryKvp.first );
+            if( pos != std::string::npos ) {
+                expandedTestSpec =  expandedTestSpec.substr( 0, pos ) +
+                                    registryKvp.second.tag +
+                                    expandedTestSpec.substr( pos + registryKvp.first.size() );
+            }
+        }
+        return expandedTestSpec;
+    }
+
+    void TagAliasRegistry::add( std::string const& alias, std::string const& tag, SourceLineInfo const& lineInfo ) {
+        CATCH_ENFORCE( startsWith(alias, "[@") && endsWith(alias, ']'),
+                      "error: tag alias, '" << alias << "' is not of the form [@alias name].\n" << lineInfo );
+
+        CATCH_ENFORCE( m_registry.insert(std::make_pair(alias, TagAlias(tag, lineInfo))).second,
+                      "error: tag alias, '" << alias << "' already registered.\n"
+                      << "\tFirst seen at: " << find(alias)->lineInfo << "\n"
+                      << "\tRedefined at: " << lineInfo );
+    }
+
+    ITagAliasRegistry::~ITagAliasRegistry() {}
+
+    ITagAliasRegistry const& ITagAliasRegistry::get() {
+        return getRegistryHub().getTagAliasRegistry();
+    }
+
+} // end namespace Catch
+// end catch_tag_alias_registry.cpp
+// start catch_test_case_info.cpp
+
+#include <cctype>
+#include <exception>
+#include <algorithm>
+#include <sstream>
+
+namespace Catch {
+
+    namespace {
+        TestCaseInfo::SpecialProperties parseSpecialTag( std::string const& tag ) {
+            if( startsWith( tag, '.' ) ||
+                tag == "!hide" )
+                return TestCaseInfo::IsHidden;
+            else if( tag == "!throws" )
+                return TestCaseInfo::Throws;
+            else if( tag == "!shouldfail" )
+                return TestCaseInfo::ShouldFail;
+            else if( tag == "!mayfail" )
+                return TestCaseInfo::MayFail;
+            else if( tag == "!nonportable" )
+                return TestCaseInfo::NonPortable;
+            else if( tag == "!benchmark" )
+                return static_cast<TestCaseInfo::SpecialProperties>( TestCaseInfo::Benchmark | TestCaseInfo::IsHidden );
+            else
+                return TestCaseInfo::None;
+        }
+        bool isReservedTag( std::string const& tag ) {
+            return parseSpecialTag( tag ) == TestCaseInfo::None && tag.size() > 0 && !std::isalnum( static_cast<unsigned char>(tag[0]) );
+        }
+        void enforceNotReservedTag( std::string const& tag, SourceLineInfo const& _lineInfo ) {
+            CATCH_ENFORCE( !isReservedTag(tag),
+                          "Tag name: [" << tag << "] is not allowed.\n"
+                          << "Tag names starting with non alpha-numeric characters are reserved\n"
+                          << _lineInfo );
+        }
+    }
+
+    TestCase makeTestCase(  ITestInvoker* _testCase,
+                            std::string const& _className,
+                            NameAndTags const& nameAndTags,
+                            SourceLineInfo const& _lineInfo )
+    {
+        bool isHidden = false;
+
+        // Parse out tags
+        std::vector<std::string> tags;
+        std::string desc, tag;
+        bool inTag = false;
+        std::string _descOrTags = nameAndTags.tags;
+        for (char c : _descOrTags) {
+            if( !inTag ) {
+                if( c == '[' )
+                    inTag = true;
+                else
+                    desc += c;
+            }
+            else {
+                if( c == ']' ) {
+                    TestCaseInfo::SpecialProperties prop = parseSpecialTag( tag );
+                    if( ( prop & TestCaseInfo::IsHidden ) != 0 )
+                        isHidden = true;
+                    else if( prop == TestCaseInfo::None )
+                        enforceNotReservedTag( tag, _lineInfo );
+
+                    tags.push_back( tag );
+                    tag.clear();
+                    inTag = false;
+                }
+                else
+                    tag += c;
+            }
+        }
+        if( isHidden ) {
+            tags.push_back( "." );
+        }
+
+        TestCaseInfo info( nameAndTags.name, _className, desc, tags, _lineInfo );
+        return TestCase( _testCase, std::move(info) );
+    }
+
+    void setTags( TestCaseInfo& testCaseInfo, std::vector<std::string> tags ) {
+        std::sort(begin(tags), end(tags));
+        tags.erase(std::unique(begin(tags), end(tags)), end(tags));
+        testCaseInfo.lcaseTags.clear();
+
+        for( auto const& tag : tags ) {
+            std::string lcaseTag = toLower( tag );
+            testCaseInfo.properties = static_cast<TestCaseInfo::SpecialProperties>( testCaseInfo.properties | parseSpecialTag( lcaseTag ) );
+            testCaseInfo.lcaseTags.push_back( lcaseTag );
+        }
+        testCaseInfo.tags = std::move(tags);
+    }
+
+    TestCaseInfo::TestCaseInfo( std::string const& _name,
+                                std::string const& _className,
+                                std::string const& _description,
+                                std::vector<std::string> const& _tags,
+                                SourceLineInfo const& _lineInfo )
+    :   name( _name ),
+        className( _className ),
+        description( _description ),
+        lineInfo( _lineInfo ),
+        properties( None )
+    {
+        setTags( *this, _tags );
+    }
+
+    bool TestCaseInfo::isHidden() const {
+        return ( properties & IsHidden ) != 0;
+    }
+    bool TestCaseInfo::throws() const {
+        return ( properties & Throws ) != 0;
+    }
+    bool TestCaseInfo::okToFail() const {
+        return ( properties & (ShouldFail | MayFail ) ) != 0;
+    }
+    bool TestCaseInfo::expectedToFail() const {
+        return ( properties & (ShouldFail ) ) != 0;
+    }
+
+    std::string TestCaseInfo::tagsAsString() const {
+        std::string ret;
+        // '[' and ']' per tag
+        std::size_t full_size = 2 * tags.size();
+        for (const auto& tag : tags) {
+            full_size += tag.size();
+        }
+        ret.reserve(full_size);
+        for (const auto& tag : tags) {
+            ret.push_back('[');
+            ret.append(tag);
+            ret.push_back(']');
+        }
+
+        return ret;
+    }
+
+    TestCase::TestCase( ITestInvoker* testCase, TestCaseInfo&& info ) : TestCaseInfo( std::move(info) ), test( testCase ) {}
+
+    TestCase TestCase::withName( std::string const& _newName ) const {
+        TestCase other( *this );
+        other.name = _newName;
+        return other;
+    }
+
+    void TestCase::invoke() const {
+        test->invoke();
+    }
+
+    bool TestCase::operator == ( TestCase const& other ) const {
+        return  test.get() == other.test.get() &&
+                name == other.name &&
+                className == other.className;
+    }
+
+    bool TestCase::operator < ( TestCase const& other ) const {
+        return name < other.name;
+    }
+
+    TestCaseInfo const& TestCase::getTestCaseInfo() const
+    {
+        return *this;
+    }
+
+} // end namespace Catch
+// end catch_test_case_info.cpp
+// start catch_test_case_registry_impl.cpp
+
+#include <sstream>
+
+namespace Catch {
+
+    std::vector<TestCase> sortTests( IConfig const& config, std::vector<TestCase> const& unsortedTestCases ) {
+
+        std::vector<TestCase> sorted = unsortedTestCases;
+
+        switch( config.runOrder() ) {
+            case RunTests::InLexicographicalOrder:
+                std::sort( sorted.begin(), sorted.end() );
+                break;
+            case RunTests::InRandomOrder:
+                seedRng( config );
+                std::shuffle( sorted.begin(), sorted.end(), rng() );
+                break;
+            case RunTests::InDeclarationOrder:
+                // already in declaration order
+                break;
+        }
+        return sorted;
+    }
+    bool matchTest( TestCase const& testCase, TestSpec const& testSpec, IConfig const& config ) {
+        return testSpec.matches( testCase ) && ( config.allowThrows() || !testCase.throws() );
+    }
+
+    void enforceNoDuplicateTestCases( std::vector<TestCase> const& functions ) {
+        std::set<TestCase> seenFunctions;
+        for( auto const& function : functions ) {
+            auto prev = seenFunctions.insert( function );
+            CATCH_ENFORCE( prev.second,
+                    "error: TEST_CASE( \"" << function.name << "\" ) already defined.\n"
+                    << "\tFirst seen at " << prev.first->getTestCaseInfo().lineInfo << "\n"
+                    << "\tRedefined at " << function.getTestCaseInfo().lineInfo );
+        }
+    }
+
+    std::vector<TestCase> filterTests( std::vector<TestCase> const& testCases, TestSpec const& testSpec, IConfig const& config ) {
+        std::vector<TestCase> filtered;
+        filtered.reserve( testCases.size() );
+        for( auto const& testCase : testCases )
+            if( matchTest( testCase, testSpec, config ) )
+                filtered.push_back( testCase );
+        return filtered;
+    }
+    std::vector<TestCase> const& getAllTestCasesSorted( IConfig const& config ) {
+        return getRegistryHub().getTestCaseRegistry().getAllTestsSorted( config );
+    }
+
+    void TestRegistry::registerTest( TestCase const& testCase ) {
+        std::string name = testCase.getTestCaseInfo().name;
+        if( name.empty() ) {
+            ReusableStringStream rss;
+            rss << "Anonymous test case " << ++m_unnamedCount;
+            return registerTest( testCase.withName( rss.str() ) );
+        }
+        m_functions.push_back( testCase );
+    }
+
+    std::vector<TestCase> const& TestRegistry::getAllTests() const {
+        return m_functions;
+    }
+    std::vector<TestCase> const& TestRegistry::getAllTestsSorted( IConfig const& config ) const {
+        if( m_sortedFunctions.empty() )
+            enforceNoDuplicateTestCases( m_functions );
+
+        if(  m_currentSortOrder != config.runOrder() || m_sortedFunctions.empty() ) {
+            m_sortedFunctions = sortTests( config, m_functions );
+            m_currentSortOrder = config.runOrder();
+        }
+        return m_sortedFunctions;
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    TestInvokerAsFunction::TestInvokerAsFunction( void(*testAsFunction)() ) noexcept : m_testAsFunction( testAsFunction ) {}
+
+    void TestInvokerAsFunction::invoke() const {
+        m_testAsFunction();
+    }
+
+    std::string extractClassName( StringRef const& classOrQualifiedMethodName ) {
+        std::string className = classOrQualifiedMethodName;
+        if( startsWith( className, '&' ) )
+        {
+            std::size_t lastColons = className.rfind( "::" );
+            std::size_t penultimateColons = className.rfind( "::", lastColons-1 );
+            if( penultimateColons == std::string::npos )
+                penultimateColons = 1;
+            className = className.substr( penultimateColons, lastColons-penultimateColons );
+        }
+        return className;
+    }
+
+} // end namespace Catch
+// end catch_test_case_registry_impl.cpp
+// start catch_test_case_tracker.cpp
+
+#include <algorithm>
+#include <cassert>
+#include <stdexcept>
+#include <memory>
+#include <sstream>
+
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wexit-time-destructors"
+#endif
+
+namespace Catch {
+namespace TestCaseTracking {
+
+    NameAndLocation::NameAndLocation( std::string const& _name, SourceLineInfo const& _location )
+    :   name( _name ),
+        location( _location )
+    {}
+
+    ITracker::~ITracker() = default;
+
+    TrackerContext& TrackerContext::instance() {
+        static TrackerContext s_instance;
+        return s_instance;
+    }
+
+    ITracker& TrackerContext::startRun() {
+        m_rootTracker = std::make_shared<SectionTracker>( NameAndLocation( "{root}", CATCH_INTERNAL_LINEINFO ), *this, nullptr );
+        m_currentTracker = nullptr;
+        m_runState = Executing;
+        return *m_rootTracker;
+    }
+
+    void TrackerContext::endRun() {
+        m_rootTracker.reset();
+        m_currentTracker = nullptr;
+        m_runState = NotStarted;
+    }
+
+    void TrackerContext::startCycle() {
+        m_currentTracker = m_rootTracker.get();
+        m_runState = Executing;
+    }
+    void TrackerContext::completeCycle() {
+        m_runState = CompletedCycle;
+    }
+
+    bool TrackerContext::completedCycle() const {
+        return m_runState == CompletedCycle;
+    }
+    ITracker& TrackerContext::currentTracker() {
+        return *m_currentTracker;
+    }
+    void TrackerContext::setCurrentTracker( ITracker* tracker ) {
+        m_currentTracker = tracker;
+    }
+
+    TrackerBase::TrackerBase( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent )
+    :   m_nameAndLocation( nameAndLocation ),
+        m_ctx( ctx ),
+        m_parent( parent )
+    {}
+
+    NameAndLocation const& TrackerBase::nameAndLocation() const {
+        return m_nameAndLocation;
+    }
+    bool TrackerBase::isComplete() const {
+        return m_runState == CompletedSuccessfully || m_runState == Failed;
+    }
+    bool TrackerBase::isSuccessfullyCompleted() const {
+        return m_runState == CompletedSuccessfully;
+    }
+    bool TrackerBase::isOpen() const {
+        return m_runState != NotStarted && !isComplete();
+    }
+    bool TrackerBase::hasChildren() const {
+        return !m_children.empty();
+    }
+
+    void TrackerBase::addChild( ITrackerPtr const& child ) {
+        m_children.push_back( child );
+    }
+
+    ITrackerPtr TrackerBase::findChild( NameAndLocation const& nameAndLocation ) {
+        auto it = std::find_if( m_children.begin(), m_children.end(),
+            [&nameAndLocation]( ITrackerPtr const& tracker ){
+                return
+                    tracker->nameAndLocation().location == nameAndLocation.location &&
+                    tracker->nameAndLocation().name == nameAndLocation.name;
+            } );
+        return( it != m_children.end() )
+            ? *it
+            : nullptr;
+    }
+    ITracker& TrackerBase::parent() {
+        assert( m_parent ); // Should always be non-null except for root
+        return *m_parent;
+    }
+
+    void TrackerBase::openChild() {
+        if( m_runState != ExecutingChildren ) {
+            m_runState = ExecutingChildren;
+            if( m_parent )
+                m_parent->openChild();
+        }
+    }
+
+    bool TrackerBase::isSectionTracker() const { return false; }
+    bool TrackerBase::isIndexTracker() const { return false; }
+
+    void TrackerBase::open() {
+        m_runState = Executing;
+        moveToThis();
+        if( m_parent )
+            m_parent->openChild();
+    }
+
+    void TrackerBase::close() {
+
+        // Close any still open children (e.g. generators)
+        while( &m_ctx.currentTracker() != this )
+            m_ctx.currentTracker().close();
+
+        switch( m_runState ) {
+            case NeedsAnotherRun:
+                break;
+
+            case Executing:
+                m_runState = CompletedSuccessfully;
+                break;
+            case ExecutingChildren:
+                if( m_children.empty() || m_children.back()->isComplete() )
+                    m_runState = CompletedSuccessfully;
+                break;
+
+            case NotStarted:
+            case CompletedSuccessfully:
+            case Failed:
+                CATCH_INTERNAL_ERROR( "Illogical state: " << m_runState );
+
+            default:
+                CATCH_INTERNAL_ERROR( "Unknown state: " << m_runState );
+        }
+        moveToParent();
+        m_ctx.completeCycle();
+    }
+    void TrackerBase::fail() {
+        m_runState = Failed;
+        if( m_parent )
+            m_parent->markAsNeedingAnotherRun();
+        moveToParent();
+        m_ctx.completeCycle();
+    }
+    void TrackerBase::markAsNeedingAnotherRun() {
+        m_runState = NeedsAnotherRun;
+    }
+
+    void TrackerBase::moveToParent() {
+        assert( m_parent );
+        m_ctx.setCurrentTracker( m_parent );
+    }
+    void TrackerBase::moveToThis() {
+        m_ctx.setCurrentTracker( this );
+    }
+
+    SectionTracker::SectionTracker( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent )
+    :   TrackerBase( nameAndLocation, ctx, parent )
+    {
+        if( parent ) {
+            while( !parent->isSectionTracker() )
+                parent = &parent->parent();
+
+            SectionTracker& parentSection = static_cast<SectionTracker&>( *parent );
+            addNextFilters( parentSection.m_filters );
+        }
+    }
+
+    bool SectionTracker::isSectionTracker() const { return true; }
+
+    SectionTracker& SectionTracker::acquire( TrackerContext& ctx, NameAndLocation const& nameAndLocation ) {
+        std::shared_ptr<SectionTracker> section;
+
+        ITracker& currentTracker = ctx.currentTracker();
+        if( ITrackerPtr childTracker = currentTracker.findChild( nameAndLocation ) ) {
+            assert( childTracker );
+            assert( childTracker->isSectionTracker() );
+            section = std::static_pointer_cast<SectionTracker>( childTracker );
+        }
+        else {
+            section = std::make_shared<SectionTracker>( nameAndLocation, ctx, &currentTracker );
+            currentTracker.addChild( section );
+        }
+        if( !ctx.completedCycle() )
+            section->tryOpen();
+        return *section;
+    }
+
+    void SectionTracker::tryOpen() {
+        if( !isComplete() && (m_filters.empty() || m_filters[0].empty() ||  m_filters[0] == m_nameAndLocation.name ) )
+            open();
+    }
+
+    void SectionTracker::addInitialFilters( std::vector<std::string> const& filters ) {
+        if( !filters.empty() ) {
+            m_filters.push_back(""); // Root - should never be consulted
+            m_filters.push_back(""); // Test Case - not a section filter
+            m_filters.insert( m_filters.end(), filters.begin(), filters.end() );
+        }
+    }
+    void SectionTracker::addNextFilters( std::vector<std::string> const& filters ) {
+        if( filters.size() > 1 )
+            m_filters.insert( m_filters.end(), ++filters.begin(), filters.end() );
+    }
+
+    IndexTracker::IndexTracker( NameAndLocation const& nameAndLocation, TrackerContext& ctx, ITracker* parent, int size )
+    :   TrackerBase( nameAndLocation, ctx, parent ),
+        m_size( size )
+    {}
+
+    bool IndexTracker::isIndexTracker() const { return true; }
+
+    IndexTracker& IndexTracker::acquire( TrackerContext& ctx, NameAndLocation const& nameAndLocation, int size ) {
+        std::shared_ptr<IndexTracker> tracker;
+
+        ITracker& currentTracker = ctx.currentTracker();
+        if( ITrackerPtr childTracker = currentTracker.findChild( nameAndLocation ) ) {
+            assert( childTracker );
+            assert( childTracker->isIndexTracker() );
+            tracker = std::static_pointer_cast<IndexTracker>( childTracker );
+        }
+        else {
+            tracker = std::make_shared<IndexTracker>( nameAndLocation, ctx, &currentTracker, size );
+            currentTracker.addChild( tracker );
+        }
+
+        if( !ctx.completedCycle() && !tracker->isComplete() ) {
+            if( tracker->m_runState != ExecutingChildren && tracker->m_runState != NeedsAnotherRun )
+                tracker->moveNext();
+            tracker->open();
+        }
+
+        return *tracker;
+    }
+
+    int IndexTracker::index() const { return m_index; }
+
+    void IndexTracker::moveNext() {
+        m_index++;
+        m_children.clear();
+    }
+
+    void IndexTracker::close() {
+        TrackerBase::close();
+        if( m_runState == CompletedSuccessfully && m_index < m_size-1 )
+            m_runState = Executing;
+    }
+
+} // namespace TestCaseTracking
+
+using TestCaseTracking::ITracker;
+using TestCaseTracking::TrackerContext;
+using TestCaseTracking::SectionTracker;
+using TestCaseTracking::IndexTracker;
+
+} // namespace Catch
+
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#endif
+// end catch_test_case_tracker.cpp
+// start catch_test_registry.cpp
+
+namespace Catch {
+
+    auto makeTestInvoker( void(*testAsFunction)() ) noexcept -> ITestInvoker* {
+        return new(std::nothrow) TestInvokerAsFunction( testAsFunction );
+    }
+
+    NameAndTags::NameAndTags( StringRef const& name_ , StringRef const& tags_ ) noexcept : name( name_ ), tags( tags_ ) {}
+
+    AutoReg::AutoReg( ITestInvoker* invoker, SourceLineInfo const& lineInfo, StringRef const& classOrMethod, NameAndTags const& nameAndTags ) noexcept {
+        CATCH_TRY {
+            getMutableRegistryHub()
+                    .registerTest(
+                        makeTestCase(
+                            invoker,
+                            extractClassName( classOrMethod ),
+                            nameAndTags,
+                            lineInfo));
+        } CATCH_CATCH_ALL {
+            // Do not throw when constructing global objects, instead register the exception to be processed later
+            getMutableRegistryHub().registerStartupException();
+        }
+    }
+
+    AutoReg::~AutoReg() = default;
+}
+// end catch_test_registry.cpp
+// start catch_test_spec.cpp
+
+#include <algorithm>
+#include <string>
+#include <vector>
+#include <memory>
+
+namespace Catch {
+
+    TestSpec::Pattern::~Pattern() = default;
+    TestSpec::NamePattern::~NamePattern() = default;
+    TestSpec::TagPattern::~TagPattern() = default;
+    TestSpec::ExcludedPattern::~ExcludedPattern() = default;
+
+    TestSpec::NamePattern::NamePattern( std::string const& name )
+    : m_wildcardPattern( toLower( name ), CaseSensitive::No )
+    {}
+    bool TestSpec::NamePattern::matches( TestCaseInfo const& testCase ) const {
+        return m_wildcardPattern.matches( toLower( testCase.name ) );
+    }
+
+    TestSpec::TagPattern::TagPattern( std::string const& tag ) : m_tag( toLower( tag ) ) {}
+    bool TestSpec::TagPattern::matches( TestCaseInfo const& testCase ) const {
+        return std::find(begin(testCase.lcaseTags),
+                         end(testCase.lcaseTags),
+                         m_tag) != end(testCase.lcaseTags);
+    }
+
+    TestSpec::ExcludedPattern::ExcludedPattern( PatternPtr const& underlyingPattern ) : m_underlyingPattern( underlyingPattern ) {}
+    bool TestSpec::ExcludedPattern::matches( TestCaseInfo const& testCase ) const { return !m_underlyingPattern->matches( testCase ); }
+
+    bool TestSpec::Filter::matches( TestCaseInfo const& testCase ) const {
+        // All patterns in a filter must match for the filter to be a match
+        for( auto const& pattern : m_patterns ) {
+            if( !pattern->matches( testCase ) )
+                return false;
+        }
+        return true;
+    }
+
+    bool TestSpec::hasFilters() const {
+        return !m_filters.empty();
+    }
+    bool TestSpec::matches( TestCaseInfo const& testCase ) const {
+        // A TestSpec matches if any filter matches
+        for( auto const& filter : m_filters )
+            if( filter.matches( testCase ) )
+                return true;
+        return false;
+    }
+}
+// end catch_test_spec.cpp
+// start catch_test_spec_parser.cpp
+
+namespace Catch {
+
+    TestSpecParser::TestSpecParser( ITagAliasRegistry const& tagAliases ) : m_tagAliases( &tagAliases ) {}
+
+    TestSpecParser& TestSpecParser::parse( std::string const& arg ) {
+        m_mode = None;
+        m_exclusion = false;
+        m_start = std::string::npos;
+        m_arg = m_tagAliases->expandAliases( arg );
+        m_escapeChars.clear();
+        for( m_pos = 0; m_pos < m_arg.size(); ++m_pos )
+            visitChar( m_arg[m_pos] );
+        if( m_mode == Name )
+            addPattern<TestSpec::NamePattern>();
+        return *this;
+    }
+    TestSpec TestSpecParser::testSpec() {
+        addFilter();
+        return m_testSpec;
+    }
+
+    void TestSpecParser::visitChar( char c ) {
+        if( m_mode == None ) {
+            switch( c ) {
+            case ' ': return;
+            case '~': m_exclusion = true; return;
+            case '[': return startNewMode( Tag, ++m_pos );
+            case '"': return startNewMode( QuotedName, ++m_pos );
+            case '\\': return escape();
+            default: startNewMode( Name, m_pos ); break;
+            }
+        }
+        if( m_mode == Name ) {
+            if( c == ',' ) {
+                addPattern<TestSpec::NamePattern>();
+                addFilter();
+            }
+            else if( c == '[' ) {
+                if( subString() == "exclude:" )
+                    m_exclusion = true;
+                else
+                    addPattern<TestSpec::NamePattern>();
+                startNewMode( Tag, ++m_pos );
+            }
+            else if( c == '\\' )
+                escape();
+        }
+        else if( m_mode == EscapedName )
+            m_mode = Name;
+        else if( m_mode == QuotedName && c == '"' )
+            addPattern<TestSpec::NamePattern>();
+        else if( m_mode == Tag && c == ']' )
+            addPattern<TestSpec::TagPattern>();
+    }
+    void TestSpecParser::startNewMode( Mode mode, std::size_t start ) {
+        m_mode = mode;
+        m_start = start;
+    }
+    void TestSpecParser::escape() {
+        if( m_mode == None )
+            m_start = m_pos;
+        m_mode = EscapedName;
+        m_escapeChars.push_back( m_pos );
+    }
+    std::string TestSpecParser::subString() const { return m_arg.substr( m_start, m_pos - m_start ); }
+
+    void TestSpecParser::addFilter() {
+        if( !m_currentFilter.m_patterns.empty() ) {
+            m_testSpec.m_filters.push_back( m_currentFilter );
+            m_currentFilter = TestSpec::Filter();
+        }
+    }
+
+    TestSpec parseTestSpec( std::string const& arg ) {
+        return TestSpecParser( ITagAliasRegistry::get() ).parse( arg ).testSpec();
+    }
+
+} // namespace Catch
+// end catch_test_spec_parser.cpp
+// start catch_timer.cpp
+
+#include <chrono>
+
+static const uint64_t nanosecondsInSecond = 1000000000;
+
+namespace Catch {
+
+    auto getCurrentNanosecondsSinceEpoch() -> uint64_t {
+        return std::chrono::duration_cast<std::chrono::nanoseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
+    }
+
+    namespace {
+        auto estimateClockResolution() -> uint64_t {
+            uint64_t sum = 0;
+            static const uint64_t iterations = 1000000;
+
+            auto startTime = getCurrentNanosecondsSinceEpoch();
+
+            for( std::size_t i = 0; i < iterations; ++i ) {
+
+                uint64_t ticks;
+                uint64_t baseTicks = getCurrentNanosecondsSinceEpoch();
+                do {
+                    ticks = getCurrentNanosecondsSinceEpoch();
+                } while( ticks == baseTicks );
+
+                auto delta = ticks - baseTicks;
+                sum += delta;
+
+                // If we have been calibrating for over 3 seconds -- the clock
+                // is terrible and we should move on.
+                // TBD: How to signal that the measured resolution is probably wrong?
+                if (ticks > startTime + 3 * nanosecondsInSecond) {
+                    return sum / i;
+                }
+            }
+
+            // We're just taking the mean, here. To do better we could take the std. dev and exclude outliers
+            // - and potentially do more iterations if there's a high variance.
+            return sum/iterations;
+        }
+    }
+    auto getEstimatedClockResolution() -> uint64_t {
+        static auto s_resolution = estimateClockResolution();
+        return s_resolution;
+    }
+
+    void Timer::start() {
+       m_nanoseconds = getCurrentNanosecondsSinceEpoch();
+    }
+    auto Timer::getElapsedNanoseconds() const -> uint64_t {
+        return getCurrentNanosecondsSinceEpoch() - m_nanoseconds;
+    }
+    auto Timer::getElapsedMicroseconds() const -> uint64_t {
+        return getElapsedNanoseconds()/1000;
+    }
+    auto Timer::getElapsedMilliseconds() const -> unsigned int {
+        return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
+    }
+    auto Timer::getElapsedSeconds() const -> double {
+        return getElapsedMicroseconds()/1000000.0;
+    }
+
+} // namespace Catch
+// end catch_timer.cpp
+// start catch_tostring.cpp
+
+#if defined(__clang__)
+#    pragma clang diagnostic push
+#    pragma clang diagnostic ignored "-Wexit-time-destructors"
+#    pragma clang diagnostic ignored "-Wglobal-constructors"
+#endif
+
+// Enable specific decls locally
+#if !defined(CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER)
+#define CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
+#endif
+
+#include <cmath>
+#include <iomanip>
+
+namespace Catch {
+
+namespace Detail {
+
+    const std::string unprintableString = "{?}";
+
+    namespace {
+        const int hexThreshold = 255;
+
+        struct Endianness {
+            enum Arch { Big, Little };
+
+            static Arch which() {
+                union _{
+                    int asInt;
+                    char asChar[sizeof (int)];
+                } u;
+
+                u.asInt = 1;
+                return ( u.asChar[sizeof(int)-1] == 1 ) ? Big : Little;
+            }
+        };
+    }
+
+    std::string rawMemoryToString( const void *object, std::size_t size ) {
+        // Reverse order for little endian architectures
+        int i = 0, end = static_cast<int>( size ), inc = 1;
+        if( Endianness::which() == Endianness::Little ) {
+            i = end-1;
+            end = inc = -1;
+        }
+
+        unsigned char const *bytes = static_cast<unsigned char const *>(object);
+        ReusableStringStream rss;
+        rss << "0x" << std::setfill('0') << std::hex;
+        for( ; i != end; i += inc )
+             rss << std::setw(2) << static_cast<unsigned>(bytes[i]);
+       return rss.str();
+    }
+}
+
+template<typename T>
+std::string fpToString( T value, int precision ) {
+    if (Catch::isnan(value)) {
+        return "nan";
+    }
+
+    ReusableStringStream rss;
+    rss << std::setprecision( precision )
+        << std::fixed
+        << value;
+    std::string d = rss.str();
+    std::size_t i = d.find_last_not_of( '0' );
+    if( i != std::string::npos && i != d.size()-1 ) {
+        if( d[i] == '.' )
+            i++;
+        d = d.substr( 0, i+1 );
+    }
+    return d;
+}
+
+//// ======================================================= ////
+//
+//   Out-of-line defs for full specialization of StringMaker
+//
+//// ======================================================= ////
+
+std::string StringMaker<std::string>::convert(const std::string& str) {
+    if (!getCurrentContext().getConfig()->showInvisibles()) {
+        return '"' + str + '"';
+    }
+
+    std::string s("\"");
+    for (char c : str) {
+        switch (c) {
+        case '\n':
+            s.append("\\n");
+            break;
+        case '\t':
+            s.append("\\t");
+            break;
+        default:
+            s.push_back(c);
+            break;
+        }
+    }
+    s.append("\"");
+    return s;
+}
+
+#ifdef CATCH_CONFIG_CPP17_STRING_VIEW
+std::string StringMaker<std::string_view>::convert(std::string_view str) {
+    return ::Catch::Detail::stringify(std::string{ str });
+}
+#endif
+
+std::string StringMaker<char const*>::convert(char const* str) {
+    if (str) {
+        return ::Catch::Detail::stringify(std::string{ str });
+    } else {
+        return{ "{null string}" };
+    }
+}
+std::string StringMaker<char*>::convert(char* str) {
+    if (str) {
+        return ::Catch::Detail::stringify(std::string{ str });
+    } else {
+        return{ "{null string}" };
+    }
+}
+
+#ifdef CATCH_CONFIG_WCHAR
+std::string StringMaker<std::wstring>::convert(const std::wstring& wstr) {
+    std::string s;
+    s.reserve(wstr.size());
+    for (auto c : wstr) {
+        s += (c <= 0xff) ? static_cast<char>(c) : '?';
+    }
+    return ::Catch::Detail::stringify(s);
+}
+
+# ifdef CATCH_CONFIG_CPP17_STRING_VIEW
+std::string StringMaker<std::wstring_view>::convert(std::wstring_view str) {
+    return StringMaker<std::wstring>::convert(std::wstring(str));
+}
+# endif
+
+std::string StringMaker<wchar_t const*>::convert(wchar_t const * str) {
+    if (str) {
+        return ::Catch::Detail::stringify(std::wstring{ str });
+    } else {
+        return{ "{null string}" };
+    }
+}
+std::string StringMaker<wchar_t *>::convert(wchar_t * str) {
+    if (str) {
+        return ::Catch::Detail::stringify(std::wstring{ str });
+    } else {
+        return{ "{null string}" };
+    }
+}
+#endif
+
+std::string StringMaker<int>::convert(int value) {
+    return ::Catch::Detail::stringify(static_cast<long long>(value));
+}
+std::string StringMaker<long>::convert(long value) {
+    return ::Catch::Detail::stringify(static_cast<long long>(value));
+}
+std::string StringMaker<long long>::convert(long long value) {
+    ReusableStringStream rss;
+    rss << value;
+    if (value > Detail::hexThreshold) {
+        rss << " (0x" << std::hex << value << ')';
+    }
+    return rss.str();
+}
+
+std::string StringMaker<unsigned int>::convert(unsigned int value) {
+    return ::Catch::Detail::stringify(static_cast<unsigned long long>(value));
+}
+std::string StringMaker<unsigned long>::convert(unsigned long value) {
+    return ::Catch::Detail::stringify(static_cast<unsigned long long>(value));
+}
+std::string StringMaker<unsigned long long>::convert(unsigned long long value) {
+    ReusableStringStream rss;
+    rss << value;
+    if (value > Detail::hexThreshold) {
+        rss << " (0x" << std::hex << value << ')';
+    }
+    return rss.str();
+}
+
+std::string StringMaker<bool>::convert(bool b) {
+    return b ? "true" : "false";
+}
+
+std::string StringMaker<signed char>::convert(signed char value) {
+    if (value == '\r') {
+        return "'\\r'";
+    } else if (value == '\f') {
+        return "'\\f'";
+    } else if (value == '\n') {
+        return "'\\n'";
+    } else if (value == '\t') {
+        return "'\\t'";
+    } else if ('\0' <= value && value < ' ') {
+        return ::Catch::Detail::stringify(static_cast<unsigned int>(value));
+    } else {
+        char chstr[] = "' '";
+        chstr[1] = value;
+        return chstr;
+    }
+}
+std::string StringMaker<char>::convert(char c) {
+    return ::Catch::Detail::stringify(static_cast<signed char>(c));
+}
+std::string StringMaker<unsigned char>::convert(unsigned char c) {
+    return ::Catch::Detail::stringify(static_cast<char>(c));
+}
+
+std::string StringMaker<std::nullptr_t>::convert(std::nullptr_t) {
+    return "nullptr";
+}
+
+std::string StringMaker<float>::convert(float value) {
+    return fpToString(value, 5) + 'f';
+}
+std::string StringMaker<double>::convert(double value) {
+    return fpToString(value, 10);
+}
+
+std::string ratio_string<std::atto>::symbol() { return "a"; }
+std::string ratio_string<std::femto>::symbol() { return "f"; }
+std::string ratio_string<std::pico>::symbol() { return "p"; }
+std::string ratio_string<std::nano>::symbol() { return "n"; }
+std::string ratio_string<std::micro>::symbol() { return "u"; }
+std::string ratio_string<std::milli>::symbol() { return "m"; }
+
+} // end namespace Catch
+
+#if defined(__clang__)
+#    pragma clang diagnostic pop
+#endif
+
+// end catch_tostring.cpp
+// start catch_totals.cpp
+
+namespace Catch {
+
+    Counts Counts::operator - ( Counts const& other ) const {
+        Counts diff;
+        diff.passed = passed - other.passed;
+        diff.failed = failed - other.failed;
+        diff.failedButOk = failedButOk - other.failedButOk;
+        return diff;
+    }
+
+    Counts& Counts::operator += ( Counts const& other ) {
+        passed += other.passed;
+        failed += other.failed;
+        failedButOk += other.failedButOk;
+        return *this;
+    }
+
+    std::size_t Counts::total() const {
+        return passed + failed + failedButOk;
+    }
+    bool Counts::allPassed() const {
+        return failed == 0 && failedButOk == 0;
+    }
+    bool Counts::allOk() const {
+        return failed == 0;
+    }
+
+    Totals Totals::operator - ( Totals const& other ) const {
+        Totals diff;
+        diff.assertions = assertions - other.assertions;
+        diff.testCases = testCases - other.testCases;
+        return diff;
+    }
+
+    Totals& Totals::operator += ( Totals const& other ) {
+        assertions += other.assertions;
+        testCases += other.testCases;
+        return *this;
+    }
+
+    Totals Totals::delta( Totals const& prevTotals ) const {
+        Totals diff = *this - prevTotals;
+        if( diff.assertions.failed > 0 )
+            ++diff.testCases.failed;
+        else if( diff.assertions.failedButOk > 0 )
+            ++diff.testCases.failedButOk;
+        else
+            ++diff.testCases.passed;
+        return diff;
+    }
+
+}
+// end catch_totals.cpp
+// start catch_uncaught_exceptions.cpp
+
+#include <exception>
+
+namespace Catch {
+    bool uncaught_exceptions() {
+#if defined(CATCH_CONFIG_CPP17_UNCAUGHT_EXCEPTIONS)
+        return std::uncaught_exceptions() > 0;
+#else
+        return std::uncaught_exception();
+#endif
+  }
+} // end namespace Catch
+// end catch_uncaught_exceptions.cpp
+// start catch_version.cpp
+
+#include <ostream>
+
+namespace Catch {
+
+    Version::Version
+        (   unsigned int _majorVersion,
+            unsigned int _minorVersion,
+            unsigned int _patchNumber,
+            char const * const _branchName,
+            unsigned int _buildNumber )
+    :   majorVersion( _majorVersion ),
+        minorVersion( _minorVersion ),
+        patchNumber( _patchNumber ),
+        branchName( _branchName ),
+        buildNumber( _buildNumber )
+    {}
+
+    std::ostream& operator << ( std::ostream& os, Version const& version ) {
+        os  << version.majorVersion << '.'
+            << version.minorVersion << '.'
+            << version.patchNumber;
+        // branchName is never null -> 0th char is \0 if it is empty
+        if (version.branchName[0]) {
+            os << '-' << version.branchName
+               << '.' << version.buildNumber;
+        }
+        return os;
+    }
+
+    Version const& libraryVersion() {
+        static Version version( 2, 5, 0, "", 0 );
+        return version;
+    }
+
+}
+// end catch_version.cpp
+// start catch_wildcard_pattern.cpp
+
+#include <sstream>
+
+namespace Catch {
+
+    WildcardPattern::WildcardPattern( std::string const& pattern,
+                                      CaseSensitive::Choice caseSensitivity )
+    :   m_caseSensitivity( caseSensitivity ),
+        m_pattern( adjustCase( pattern ) )
+    {
+        if( startsWith( m_pattern, '*' ) ) {
+            m_pattern = m_pattern.substr( 1 );
+            m_wildcard = WildcardAtStart;
+        }
+        if( endsWith( m_pattern, '*' ) ) {
+            m_pattern = m_pattern.substr( 0, m_pattern.size()-1 );
+            m_wildcard = static_cast<WildcardPosition>( m_wildcard | WildcardAtEnd );
+        }
+    }
+
+    bool WildcardPattern::matches( std::string const& str ) const {
+        switch( m_wildcard ) {
+            case NoWildcard:
+                return m_pattern == adjustCase( str );
+            case WildcardAtStart:
+                return endsWith( adjustCase( str ), m_pattern );
+            case WildcardAtEnd:
+                return startsWith( adjustCase( str ), m_pattern );
+            case WildcardAtBothEnds:
+                return contains( adjustCase( str ), m_pattern );
+            default:
+                CATCH_INTERNAL_ERROR( "Unknown enum" );
+        }
+    }
+
+    std::string WildcardPattern::adjustCase( std::string const& str ) const {
+        return m_caseSensitivity == CaseSensitive::No ? toLower( str ) : str;
+    }
+}
+// end catch_wildcard_pattern.cpp
+// start catch_xmlwriter.cpp
+
+#include <iomanip>
+
+using uchar = unsigned char;
+
+namespace Catch {
+
+namespace {
+
+    size_t trailingBytes(unsigned char c) {
+        if ((c & 0xE0) == 0xC0) {
+            return 2;
+        }
+        if ((c & 0xF0) == 0xE0) {
+            return 3;
+        }
+        if ((c & 0xF8) == 0xF0) {
+            return 4;
+        }
+        CATCH_INTERNAL_ERROR("Invalid multibyte utf-8 start byte encountered");
+    }
+
+    uint32_t headerValue(unsigned char c) {
+        if ((c & 0xE0) == 0xC0) {
+            return c & 0x1F;
+        }
+        if ((c & 0xF0) == 0xE0) {
+            return c & 0x0F;
+        }
+        if ((c & 0xF8) == 0xF0) {
+            return c & 0x07;
+        }
+        CATCH_INTERNAL_ERROR("Invalid multibyte utf-8 start byte encountered");
+    }
+
+    void hexEscapeChar(std::ostream& os, unsigned char c) {
+        os << "\\x"
+            << std::uppercase << std::hex << std::setfill('0') << std::setw(2)
+            << static_cast<int>(c);
+    }
+
+} // anonymous namespace
+
+    XmlEncode::XmlEncode( std::string const& str, ForWhat forWhat )
+    :   m_str( str ),
+        m_forWhat( forWhat )
+    {}
+
+    void XmlEncode::encodeTo( std::ostream& os ) const {
+        // Apostrophe escaping not necessary if we always use " to write attributes
+        // (see: http://www.w3.org/TR/xml/#syntax)
+
+        for( std::size_t idx = 0; idx < m_str.size(); ++ idx ) {
+            uchar c = m_str[idx];
+            switch (c) {
+            case '<':   os << "&lt;"; break;
+            case '&':   os << "&amp;"; break;
+
+            case '>':
+                // See: http://www.w3.org/TR/xml/#syntax
+                if (idx > 2 && m_str[idx - 1] == ']' && m_str[idx - 2] == ']')
+                    os << "&gt;";
+                else
+                    os << c;
+                break;
+
+            case '\"':
+                if (m_forWhat == ForAttributes)
+                    os << "&quot;";
+                else
+                    os << c;
+                break;
+
+            default:
+                // Check for control characters and invalid utf-8
+
+                // Escape control characters in standard ascii
+                // see http://stackoverflow.com/questions/404107/why-are-control-characters-illegal-in-xml-1-0
+                if (c < 0x09 || (c > 0x0D && c < 0x20) || c == 0x7F) {
+                    hexEscapeChar(os, c);
+                    break;
+                }
+
+                // Plain ASCII: Write it to stream
+                if (c < 0x7F) {
+                    os << c;
+                    break;
+                }
+
+                // UTF-8 territory
+                // Check if the encoding is valid and if it is not, hex escape bytes.
+                // Important: We do not check the exact decoded values for validity, only the encoding format
+                // First check that this bytes is a valid lead byte:
+                // This means that it is not encoded as 1111 1XXX
+                // Or as 10XX XXXX
+                if (c <  0xC0 ||
+                    c >= 0xF8) {
+                    hexEscapeChar(os, c);
+                    break;
+                }
+
+                auto encBytes = trailingBytes(c);
+                // Are there enough bytes left to avoid accessing out-of-bounds memory?
+                if (idx + encBytes - 1 >= m_str.size()) {
+                    hexEscapeChar(os, c);
+                    break;
+                }
+                // The header is valid, check data
+                // The next encBytes bytes must together be a valid utf-8
+                // This means: bitpattern 10XX XXXX and the extracted value is sane (ish)
+                bool valid = true;
+                uint32_t value = headerValue(c);
+                for (std::size_t n = 1; n < encBytes; ++n) {
+                    uchar nc = m_str[idx + n];
+                    valid &= ((nc & 0xC0) == 0x80);
+                    value = (value << 6) | (nc & 0x3F);
+                }
+
+                if (
+                    // Wrong bit pattern of following bytes
+                    (!valid) ||
+                    // Overlong encodings
+                    (value < 0x80) ||
+                    (0x80 <= value && value < 0x800   && encBytes > 2) ||
+                    (0x800 < value && value < 0x10000 && encBytes > 3) ||
+                    // Encoded value out of range
+                    (value >= 0x110000)
+                    ) {
+                    hexEscapeChar(os, c);
+                    break;
+                }
+
+                // If we got here, this is in fact a valid(ish) utf-8 sequence
+                for (std::size_t n = 0; n < encBytes; ++n) {
+                    os << m_str[idx + n];
+                }
+                idx += encBytes - 1;
+                break;
+            }
+        }
+    }
+
+    std::ostream& operator << ( std::ostream& os, XmlEncode const& xmlEncode ) {
+        xmlEncode.encodeTo( os );
+        return os;
+    }
+
+    XmlWriter::ScopedElement::ScopedElement( XmlWriter* writer )
+    :   m_writer( writer )
+    {}
+
+    XmlWriter::ScopedElement::ScopedElement( ScopedElement&& other ) noexcept
+    :   m_writer( other.m_writer ){
+        other.m_writer = nullptr;
+    }
+    XmlWriter::ScopedElement& XmlWriter::ScopedElement::operator=( ScopedElement&& other ) noexcept {
+        if ( m_writer ) {
+            m_writer->endElement();
+        }
+        m_writer = other.m_writer;
+        other.m_writer = nullptr;
+        return *this;
+    }
+
+    XmlWriter::ScopedElement::~ScopedElement() {
+        if( m_writer )
+            m_writer->endElement();
+    }
+
+    XmlWriter::ScopedElement& XmlWriter::ScopedElement::writeText( std::string const& text, bool indent ) {
+        m_writer->writeText( text, indent );
+        return *this;
+    }
+
+    XmlWriter::XmlWriter( std::ostream& os ) : m_os( os )
+    {
+        writeDeclaration();
+    }
+
+    XmlWriter::~XmlWriter() {
+        while( !m_tags.empty() )
+            endElement();
+    }
+
+    XmlWriter& XmlWriter::startElement( std::string const& name ) {
+        ensureTagClosed();
+        newlineIfNecessary();
+        m_os << m_indent << '<' << name;
+        m_tags.push_back( name );
+        m_indent += "  ";
+        m_tagIsOpen = true;
+        return *this;
+    }
+
+    XmlWriter::ScopedElement XmlWriter::scopedElement( std::string const& name ) {
+        ScopedElement scoped( this );
+        startElement( name );
+        return scoped;
+    }
+
+    XmlWriter& XmlWriter::endElement() {
+        newlineIfNecessary();
+        m_indent = m_indent.substr( 0, m_indent.size()-2 );
+        if( m_tagIsOpen ) {
+            m_os << "/>";
+            m_tagIsOpen = false;
+        }
+        else {
+            m_os << m_indent << "</" << m_tags.back() << ">";
+        }
+        m_os << std::endl;
+        m_tags.pop_back();
+        return *this;
+    }
+
+    XmlWriter& XmlWriter::writeAttribute( std::string const& name, std::string const& attribute ) {
+        if( !name.empty() && !attribute.empty() )
+            m_os << ' ' << name << "=\"" << XmlEncode( attribute, XmlEncode::ForAttributes ) << '"';
+        return *this;
+    }
+
+    XmlWriter& XmlWriter::writeAttribute( std::string const& name, bool attribute ) {
+        m_os << ' ' << name << "=\"" << ( attribute ? "true" : "false" ) << '"';
+        return *this;
+    }
+
+    XmlWriter& XmlWriter::writeText( std::string const& text, bool indent ) {
+        if( !text.empty() ){
+            bool tagWasOpen = m_tagIsOpen;
+            ensureTagClosed();
+            if( tagWasOpen && indent )
+                m_os << m_indent;
+            m_os << XmlEncode( text );
+            m_needsNewline = true;
+        }
+        return *this;
+    }
+
+    XmlWriter& XmlWriter::writeComment( std::string const& text ) {
+        ensureTagClosed();
+        m_os << m_indent << "<!--" << text << "-->";
+        m_needsNewline = true;
+        return *this;
+    }
+
+    void XmlWriter::writeStylesheetRef( std::string const& url ) {
+        m_os << "<?xml-stylesheet type=\"text/xsl\" href=\"" << url << "\"?>\n";
+    }
+
+    XmlWriter& XmlWriter::writeBlankLine() {
+        ensureTagClosed();
+        m_os << '\n';
+        return *this;
+    }
+
+    void XmlWriter::ensureTagClosed() {
+        if( m_tagIsOpen ) {
+            m_os << ">" << std::endl;
+            m_tagIsOpen = false;
+        }
+    }
+
+    void XmlWriter::writeDeclaration() {
+        m_os << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
+    }
+
+    void XmlWriter::newlineIfNecessary() {
+        if( m_needsNewline ) {
+            m_os << std::endl;
+            m_needsNewline = false;
+        }
+    }
+}
+// end catch_xmlwriter.cpp
+// start catch_reporter_bases.cpp
+
+#include <cstring>
+#include <cfloat>
+#include <cstdio>
+#include <cassert>
+#include <memory>
+
+namespace Catch {
+    void prepareExpandedExpression(AssertionResult& result) {
+        result.getExpandedExpression();
+    }
+
+    // Because formatting using c++ streams is stateful, drop down to C is required
+    // Alternatively we could use stringstream, but its performance is... not good.
+    std::string getFormattedDuration( double duration ) {
+        // Max exponent + 1 is required to represent the whole part
+        // + 1 for decimal point
+        // + 3 for the 3 decimal places
+        // + 1 for null terminator
+        const std::size_t maxDoubleSize = DBL_MAX_10_EXP + 1 + 1 + 3 + 1;
+        char buffer[maxDoubleSize];
+
+        // Save previous errno, to prevent sprintf from overwriting it
+        ErrnoGuard guard;
+#ifdef _MSC_VER
+        sprintf_s(buffer, "%.3f", duration);
+#else
+        sprintf(buffer, "%.3f", duration);
+#endif
+        return std::string(buffer);
+    }
+
+    TestEventListenerBase::TestEventListenerBase(ReporterConfig const & _config)
+        :StreamingReporterBase(_config) {}
+
+    std::set<Verbosity> TestEventListenerBase::getSupportedVerbosities() {
+        return { Verbosity::Quiet, Verbosity::Normal, Verbosity::High };
+    }
+
+    void TestEventListenerBase::assertionStarting(AssertionInfo const &) {}
+
+    bool TestEventListenerBase::assertionEnded(AssertionStats const &) {
+        return false;
+    }
+
+} // end namespace Catch
+// end catch_reporter_bases.cpp
+// start catch_reporter_compact.cpp
+
+namespace {
+
+#ifdef CATCH_PLATFORM_MAC
+    const char* failedString() { return "FAILED"; }
+    const char* passedString() { return "PASSED"; }
+#else
+    const char* failedString() { return "failed"; }
+    const char* passedString() { return "passed"; }
+#endif
+
+    // Colour::LightGrey
+    Catch::Colour::Code dimColour() { return Catch::Colour::FileName; }
+
+    std::string bothOrAll( std::size_t count ) {
+        return count == 1 ? std::string() :
+               count == 2 ? "both " : "all " ;
+    }
+
+} // anon namespace
+
+namespace Catch {
+namespace {
+// Colour, message variants:
+// - white: No tests ran.
+// -   red: Failed [both/all] N test cases, failed [both/all] M assertions.
+// - white: Passed [both/all] N test cases (no assertions).
+// -   red: Failed N tests cases, failed M assertions.
+// - green: Passed [both/all] N tests cases with M assertions.
+void printTotals(std::ostream& out, const Totals& totals) {
+    if (totals.testCases.total() == 0) {
+        out << "No tests ran.";
+    } else if (totals.testCases.failed == totals.testCases.total()) {
+        Colour colour(Colour::ResultError);
+        const std::string qualify_assertions_failed =
+            totals.assertions.failed == totals.assertions.total() ?
+            bothOrAll(totals.assertions.failed) : std::string();
+        out <<
+            "Failed " << bothOrAll(totals.testCases.failed)
+            << pluralise(totals.testCases.failed, "test case") << ", "
+            "failed " << qualify_assertions_failed <<
+            pluralise(totals.assertions.failed, "assertion") << '.';
+    } else if (totals.assertions.total() == 0) {
+        out <<
+            "Passed " << bothOrAll(totals.testCases.total())
+            << pluralise(totals.testCases.total(), "test case")
+            << " (no assertions).";
+    } else if (totals.assertions.failed) {
+        Colour colour(Colour::ResultError);
+        out <<
+            "Failed " << pluralise(totals.testCases.failed, "test case") << ", "
+            "failed " << pluralise(totals.assertions.failed, "assertion") << '.';
+    } else {
+        Colour colour(Colour::ResultSuccess);
+        out <<
+            "Passed " << bothOrAll(totals.testCases.passed)
+            << pluralise(totals.testCases.passed, "test case") <<
+            " with " << pluralise(totals.assertions.passed, "assertion") << '.';
+    }
+}
+
+// Implementation of CompactReporter formatting
+class AssertionPrinter {
+public:
+    AssertionPrinter& operator= (AssertionPrinter const&) = delete;
+    AssertionPrinter(AssertionPrinter const&) = delete;
+    AssertionPrinter(std::ostream& _stream, AssertionStats const& _stats, bool _printInfoMessages)
+        : stream(_stream)
+        , result(_stats.assertionResult)
+        , messages(_stats.infoMessages)
+        , itMessage(_stats.infoMessages.begin())
+        , printInfoMessages(_printInfoMessages) {}
+
+    void print() {
+        printSourceInfo();
+
+        itMessage = messages.begin();
+
+        switch (result.getResultType()) {
+        case ResultWas::Ok:
+            printResultType(Colour::ResultSuccess, passedString());
+            printOriginalExpression();
+            printReconstructedExpression();
+            if (!result.hasExpression())
+                printRemainingMessages(Colour::None);
+            else
+                printRemainingMessages();
+            break;
+        case ResultWas::ExpressionFailed:
+            if (result.isOk())
+                printResultType(Colour::ResultSuccess, failedString() + std::string(" - but was ok"));
+            else
+                printResultType(Colour::Error, failedString());
+            printOriginalExpression();
+            printReconstructedExpression();
+            printRemainingMessages();
+            break;
+        case ResultWas::ThrewException:
+            printResultType(Colour::Error, failedString());
+            printIssue("unexpected exception with message:");
+            printMessage();
+            printExpressionWas();
+            printRemainingMessages();
+            break;
+        case ResultWas::FatalErrorCondition:
+            printResultType(Colour::Error, failedString());
+            printIssue("fatal error condition with message:");
+            printMessage();
+            printExpressionWas();
+            printRemainingMessages();
+            break;
+        case ResultWas::DidntThrowException:
+            printResultType(Colour::Error, failedString());
+            printIssue("expected exception, got none");
+            printExpressionWas();
+            printRemainingMessages();
+            break;
+        case ResultWas::Info:
+            printResultType(Colour::None, "info");
+            printMessage();
+            printRemainingMessages();
+            break;
+        case ResultWas::Warning:
+            printResultType(Colour::None, "warning");
+            printMessage();
+            printRemainingMessages();
+            break;
+        case ResultWas::ExplicitFailure:
+            printResultType(Colour::Error, failedString());
+            printIssue("explicitly");
+            printRemainingMessages(Colour::None);
+            break;
+            // These cases are here to prevent compiler warnings
+        case ResultWas::Unknown:
+        case ResultWas::FailureBit:
+        case ResultWas::Exception:
+            printResultType(Colour::Error, "** internal error **");
+            break;
+        }
+    }
+
+private:
+    void printSourceInfo() const {
+        Colour colourGuard(Colour::FileName);
+        stream << result.getSourceInfo() << ':';
+    }
+
+    void printResultType(Colour::Code colour, std::string const& passOrFail) const {
+        if (!passOrFail.empty()) {
+            {
+                Colour colourGuard(colour);
+                stream << ' ' << passOrFail;
+            }
+            stream << ':';
+        }
+    }
+
+    void printIssue(std::string const& issue) const {
+        stream << ' ' << issue;
+    }
+
+    void printExpressionWas() {
+        if (result.hasExpression()) {
+            stream << ';';
+            {
+                Colour colour(dimColour());
+                stream << " expression was:";
+            }
+            printOriginalExpression();
+        }
+    }
+
+    void printOriginalExpression() const {
+        if (result.hasExpression()) {
+            stream << ' ' << result.getExpression();
+        }
+    }
+
+    void printReconstructedExpression() const {
+        if (result.hasExpandedExpression()) {
+            {
+                Colour colour(dimColour());
+                stream << " for: ";
+            }
+            stream << result.getExpandedExpression();
+        }
+    }
+
+    void printMessage() {
+        if (itMessage != messages.end()) {
+            stream << " '" << itMessage->message << '\'';
+            ++itMessage;
+        }
+    }
+
+    void printRemainingMessages(Colour::Code colour = dimColour()) {
+        if (itMessage == messages.end())
+            return;
+
+        // using messages.end() directly yields (or auto) compilation error:
+        std::vector<MessageInfo>::const_iterator itEnd = messages.end();
+        const std::size_t N = static_cast<std::size_t>(std::distance(itMessage, itEnd));
+
+        {
+            Colour colourGuard(colour);
+            stream << " with " << pluralise(N, "message") << ':';
+        }
+
+        for (; itMessage != itEnd; ) {
+            // If this assertion is a warning ignore any INFO messages
+            if (printInfoMessages || itMessage->type != ResultWas::Info) {
+                stream << " '" << itMessage->message << '\'';
+                if (++itMessage != itEnd) {
+                    Colour colourGuard(dimColour());
+                    stream << " and";
+                }
+            }
+        }
+    }
+
+private:
+    std::ostream& stream;
+    AssertionResult const& result;
+    std::vector<MessageInfo> messages;
+    std::vector<MessageInfo>::const_iterator itMessage;
+    bool printInfoMessages;
+};
+
+} // anon namespace
+
+        std::string CompactReporter::getDescription() {
+            return "Reports test results on a single line, suitable for IDEs";
+        }
+
+        ReporterPreferences CompactReporter::getPreferences() const {
+            return m_reporterPrefs;
+        }
+
+        void CompactReporter::noMatchingTestCases( std::string const& spec ) {
+            stream << "No test cases matched '" << spec << '\'' << std::endl;
+        }
+
+        void CompactReporter::assertionStarting( AssertionInfo const& ) {}
+
+        bool CompactReporter::assertionEnded( AssertionStats const& _assertionStats ) {
+            AssertionResult const& result = _assertionStats.assertionResult;
+
+            bool printInfoMessages = true;
+
+            // Drop out if result was successful and we're not printing those
+            if( !m_config->includeSuccessfulResults() && result.isOk() ) {
+                if( result.getResultType() != ResultWas::Warning )
+                    return false;
+                printInfoMessages = false;
+            }
+
+            AssertionPrinter printer( stream, _assertionStats, printInfoMessages );
+            printer.print();
+
+            stream << std::endl;
+            return true;
+        }
+
+        void CompactReporter::sectionEnded(SectionStats const& _sectionStats) {
+            if (m_config->showDurations() == ShowDurations::Always) {
+                stream << getFormattedDuration(_sectionStats.durationInSeconds) << " s: " << _sectionStats.sectionInfo.name << std::endl;
+            }
+        }
+
+        void CompactReporter::testRunEnded( TestRunStats const& _testRunStats ) {
+            printTotals( stream, _testRunStats.totals );
+            stream << '\n' << std::endl;
+            StreamingReporterBase::testRunEnded( _testRunStats );
+        }
+
+        CompactReporter::~CompactReporter() {}
+
+    CATCH_REGISTER_REPORTER( "compact", CompactReporter )
+
+} // end namespace Catch
+// end catch_reporter_compact.cpp
+// start catch_reporter_console.cpp
+
+#include <cfloat>
+#include <cstdio>
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4061) // Not all labels are EXPLICITLY handled in switch
+ // Note that 4062 (not all labels are handled
+ // and default is missing) is enabled
+#endif
+
+namespace Catch {
+
+namespace {
+
+// Formatter impl for ConsoleReporter
+class ConsoleAssertionPrinter {
+public:
+    ConsoleAssertionPrinter& operator= (ConsoleAssertionPrinter const&) = delete;
+    ConsoleAssertionPrinter(ConsoleAssertionPrinter const&) = delete;
+    ConsoleAssertionPrinter(std::ostream& _stream, AssertionStats const& _stats, bool _printInfoMessages)
+        : stream(_stream),
+        stats(_stats),
+        result(_stats.assertionResult),
+        colour(Colour::None),
+        message(result.getMessage()),
+        messages(_stats.infoMessages),
+        printInfoMessages(_printInfoMessages) {
+        switch (result.getResultType()) {
+        case ResultWas::Ok:
+            colour = Colour::Success;
+            passOrFail = "PASSED";
+            //if( result.hasMessage() )
+            if (_stats.infoMessages.size() == 1)
+                messageLabel = "with message";
+            if (_stats.infoMessages.size() > 1)
+                messageLabel = "with messages";
+            break;
+        case ResultWas::ExpressionFailed:
+            if (result.isOk()) {
+                colour = Colour::Success;
+                passOrFail = "FAILED - but was ok";
+            } else {
+                colour = Colour::Error;
+                passOrFail = "FAILED";
+            }
+            if (_stats.infoMessages.size() == 1)
+                messageLabel = "with message";
+            if (_stats.infoMessages.size() > 1)
+                messageLabel = "with messages";
+            break;
+        case ResultWas::ThrewException:
+            colour = Colour::Error;
+            passOrFail = "FAILED";
+            messageLabel = "due to unexpected exception with ";
+            if (_stats.infoMessages.size() == 1)
+                messageLabel += "message";
+            if (_stats.infoMessages.size() > 1)
+                messageLabel += "messages";
+            break;
+        case ResultWas::FatalErrorCondition:
+            colour = Colour::Error;
+            passOrFail = "FAILED";
+            messageLabel = "due to a fatal error condition";
+            break;
+        case ResultWas::DidntThrowException:
+            colour = Colour::Error;
+            passOrFail = "FAILED";
+            messageLabel = "because no exception was thrown where one was expected";
+            break;
+        case ResultWas::Info:
+            messageLabel = "info";
+            break;
+        case ResultWas::Warning:
+            messageLabel = "warning";
+            break;
+        case ResultWas::ExplicitFailure:
+            passOrFail = "FAILED";
+            colour = Colour::Error;
+            if (_stats.infoMessages.size() == 1)
+                messageLabel = "explicitly with message";
+            if (_stats.infoMessages.size() > 1)
+                messageLabel = "explicitly with messages";
+            break;
+            // These cases are here to prevent compiler warnings
+        case ResultWas::Unknown:
+        case ResultWas::FailureBit:
+        case ResultWas::Exception:
+            passOrFail = "** internal error **";
+            colour = Colour::Error;
+            break;
+        }
+    }
+
+    void print() const {
+        printSourceInfo();
+        if (stats.totals.assertions.total() > 0) {
+            printResultType();
+            printOriginalExpression();
+            printReconstructedExpression();
+        } else {
+            stream << '\n';
+        }
+        printMessage();
+    }
+
+private:
+    void printResultType() const {
+        if (!passOrFail.empty()) {
+            Colour colourGuard(colour);
+            stream << passOrFail << ":\n";
+        }
+    }
+    void printOriginalExpression() const {
+        if (result.hasExpression()) {
+            Colour colourGuard(Colour::OriginalExpression);
+            stream << "  ";
+            stream << result.getExpressionInMacro();
+            stream << '\n';
+        }
+    }
+    void printReconstructedExpression() const {
+        if (result.hasExpandedExpression()) {
+            stream << "with expansion:\n";
+            Colour colourGuard(Colour::ReconstructedExpression);
+            stream << Column(result.getExpandedExpression()).indent(2) << '\n';
+        }
+    }
+    void printMessage() const {
+        if (!messageLabel.empty())
+            stream << messageLabel << ':' << '\n';
+        for (auto const& msg : messages) {
+            // If this assertion is a warning ignore any INFO messages
+            if (printInfoMessages || msg.type != ResultWas::Info)
+                stream << Column(msg.message).indent(2) << '\n';
+        }
+    }
+    void printSourceInfo() const {
+        Colour colourGuard(Colour::FileName);
+        stream << result.getSourceInfo() << ": ";
+    }
+
+    std::ostream& stream;
+    AssertionStats const& stats;
+    AssertionResult const& result;
+    Colour::Code colour;
+    std::string passOrFail;
+    std::string messageLabel;
+    std::string message;
+    std::vector<MessageInfo> messages;
+    bool printInfoMessages;
+};
+
+std::size_t makeRatio(std::size_t number, std::size_t total) {
+    std::size_t ratio = total > 0 ? CATCH_CONFIG_CONSOLE_WIDTH * number / total : 0;
+    return (ratio == 0 && number > 0) ? 1 : ratio;
+}
+
+std::size_t& findMax(std::size_t& i, std::size_t& j, std::size_t& k) {
+    if (i > j && i > k)
+        return i;
+    else if (j > k)
+        return j;
+    else
+        return k;
+}
+
+struct ColumnInfo {
+    enum Justification { Left, Right };
+    std::string name;
+    int width;
+    Justification justification;
+};
+struct ColumnBreak {};
+struct RowBreak {};
+
+class Duration {
+    enum class Unit {
+        Auto,
+        Nanoseconds,
+        Microseconds,
+        Milliseconds,
+        Seconds,
+        Minutes
+    };
+    static const uint64_t s_nanosecondsInAMicrosecond = 1000;
+    static const uint64_t s_nanosecondsInAMillisecond = 1000 * s_nanosecondsInAMicrosecond;
+    static const uint64_t s_nanosecondsInASecond = 1000 * s_nanosecondsInAMillisecond;
+    static const uint64_t s_nanosecondsInAMinute = 60 * s_nanosecondsInASecond;
+
+    uint64_t m_inNanoseconds;
+    Unit m_units;
+
+public:
+    explicit Duration(uint64_t inNanoseconds, Unit units = Unit::Auto)
+        : m_inNanoseconds(inNanoseconds),
+        m_units(units) {
+        if (m_units == Unit::Auto) {
+            if (m_inNanoseconds < s_nanosecondsInAMicrosecond)
+                m_units = Unit::Nanoseconds;
+            else if (m_inNanoseconds < s_nanosecondsInAMillisecond)
+                m_units = Unit::Microseconds;
+            else if (m_inNanoseconds < s_nanosecondsInASecond)
+                m_units = Unit::Milliseconds;
+            else if (m_inNanoseconds < s_nanosecondsInAMinute)
+                m_units = Unit::Seconds;
+            else
+                m_units = Unit::Minutes;
+        }
+
+    }
+
+    auto value() const -> double {
+        switch (m_units) {
+        case Unit::Microseconds:
+            return m_inNanoseconds / static_cast<double>(s_nanosecondsInAMicrosecond);
+        case Unit::Milliseconds:
+            return m_inNanoseconds / static_cast<double>(s_nanosecondsInAMillisecond);
+        case Unit::Seconds:
+            return m_inNanoseconds / static_cast<double>(s_nanosecondsInASecond);
+        case Unit::Minutes:
+            return m_inNanoseconds / static_cast<double>(s_nanosecondsInAMinute);
+        default:
+            return static_cast<double>(m_inNanoseconds);
+        }
+    }
+    auto unitsAsString() const -> std::string {
+        switch (m_units) {
+        case Unit::Nanoseconds:
+            return "ns";
+        case Unit::Microseconds:
+            return "µs";
+        case Unit::Milliseconds:
+            return "ms";
+        case Unit::Seconds:
+            return "s";
+        case Unit::Minutes:
+            return "m";
+        default:
+            return "** internal error **";
+        }
+
+    }
+    friend auto operator << (std::ostream& os, Duration const& duration) -> std::ostream& {
+        return os << duration.value() << " " << duration.unitsAsString();
+    }
+};
+} // end anon namespace
+
+class TablePrinter {
+    std::ostream& m_os;
+    std::vector<ColumnInfo> m_columnInfos;
+    std::ostringstream m_oss;
+    int m_currentColumn = -1;
+    bool m_isOpen = false;
+
+public:
+    TablePrinter( std::ostream& os, std::vector<ColumnInfo> columnInfos )
+    :   m_os( os ),
+        m_columnInfos( std::move( columnInfos ) ) {}
+
+    auto columnInfos() const -> std::vector<ColumnInfo> const& {
+        return m_columnInfos;
+    }
+
+    void open() {
+        if (!m_isOpen) {
+            m_isOpen = true;
+            *this << RowBreak();
+            for (auto const& info : m_columnInfos)
+                *this << info.name << ColumnBreak();
+            *this << RowBreak();
+            m_os << Catch::getLineOfChars<'-'>() << "\n";
+        }
+    }
+    void close() {
+        if (m_isOpen) {
+            *this << RowBreak();
+            m_os << std::endl;
+            m_isOpen = false;
+        }
+    }
+
+    template<typename T>
+    friend TablePrinter& operator << (TablePrinter& tp, T const& value) {
+        tp.m_oss << value;
+        return tp;
+    }
+
+    friend TablePrinter& operator << (TablePrinter& tp, ColumnBreak) {
+        auto colStr = tp.m_oss.str();
+        // This takes account of utf8 encodings
+        auto strSize = Catch::StringRef(colStr).numberOfCharacters();
+        tp.m_oss.str("");
+        tp.open();
+        if (tp.m_currentColumn == static_cast<int>(tp.m_columnInfos.size() - 1)) {
+            tp.m_currentColumn = -1;
+            tp.m_os << "\n";
+        }
+        tp.m_currentColumn++;
+
+        auto colInfo = tp.m_columnInfos[tp.m_currentColumn];
+        auto padding = (strSize + 2 < static_cast<std::size_t>(colInfo.width))
+            ? std::string(colInfo.width - (strSize + 2), ' ')
+            : std::string();
+        if (colInfo.justification == ColumnInfo::Left)
+            tp.m_os << colStr << padding << " ";
+        else
+            tp.m_os << padding << colStr << " ";
+        return tp;
+    }
+
+    friend TablePrinter& operator << (TablePrinter& tp, RowBreak) {
+        if (tp.m_currentColumn > 0) {
+            tp.m_os << "\n";
+            tp.m_currentColumn = -1;
+        }
+        return tp;
+    }
+};
+
+ConsoleReporter::ConsoleReporter(ReporterConfig const& config)
+    : StreamingReporterBase(config),
+    m_tablePrinter(new TablePrinter(config.stream(),
+    {
+        { "benchmark name", CATCH_CONFIG_CONSOLE_WIDTH - 32, ColumnInfo::Left },
+        { "iters", 8, ColumnInfo::Right },
+        { "elapsed ns", 14, ColumnInfo::Right },
+        { "average", 14, ColumnInfo::Right }
+    })) {}
+ConsoleReporter::~ConsoleReporter() = default;
+
+std::string ConsoleReporter::getDescription() {
+    return "Reports test results as plain lines of text";
+}
+
+void ConsoleReporter::noMatchingTestCases(std::string const& spec) {
+    stream << "No test cases matched '" << spec << '\'' << std::endl;
+}
+
+void ConsoleReporter::assertionStarting(AssertionInfo const&) {}
+
+bool ConsoleReporter::assertionEnded(AssertionStats const& _assertionStats) {
+    AssertionResult const& result = _assertionStats.assertionResult;
+
+    bool includeResults = m_config->includeSuccessfulResults() || !result.isOk();
+
+    // Drop out if result was successful but we're not printing them.
+    if (!includeResults && result.getResultType() != ResultWas::Warning)
+        return false;
+
+    lazyPrint();
+
+    ConsoleAssertionPrinter printer(stream, _assertionStats, includeResults);
+    printer.print();
+    stream << std::endl;
+    return true;
+}
+
+void ConsoleReporter::sectionStarting(SectionInfo const& _sectionInfo) {
+    m_headerPrinted = false;
+    StreamingReporterBase::sectionStarting(_sectionInfo);
+}
+void ConsoleReporter::sectionEnded(SectionStats const& _sectionStats) {
+    m_tablePrinter->close();
+    if (_sectionStats.missingAssertions) {
+        lazyPrint();
+        Colour colour(Colour::ResultError);
+        if (m_sectionStack.size() > 1)
+            stream << "\nNo assertions in section";
+        else
+            stream << "\nNo assertions in test case";
+        stream << " '" << _sectionStats.sectionInfo.name << "'\n" << std::endl;
+    }
+    if (m_config->showDurations() == ShowDurations::Always) {
+        stream << getFormattedDuration(_sectionStats.durationInSeconds) << " s: " << _sectionStats.sectionInfo.name << std::endl;
+    }
+    if (m_headerPrinted) {
+        m_headerPrinted = false;
+    }
+    StreamingReporterBase::sectionEnded(_sectionStats);
+}
+
+void ConsoleReporter::benchmarkStarting(BenchmarkInfo const& info) {
+    lazyPrintWithoutClosingBenchmarkTable();
+
+    auto nameCol = Column( info.name ).width( static_cast<std::size_t>( m_tablePrinter->columnInfos()[0].width - 2 ) );
+
+    bool firstLine = true;
+    for (auto line : nameCol) {
+        if (!firstLine)
+            (*m_tablePrinter) << ColumnBreak() << ColumnBreak() << ColumnBreak();
+        else
+            firstLine = false;
+
+        (*m_tablePrinter) << line << ColumnBreak();
+    }
+}
+void ConsoleReporter::benchmarkEnded(BenchmarkStats const& stats) {
+    Duration average(stats.elapsedTimeInNanoseconds / stats.iterations);
+    (*m_tablePrinter)
+        << stats.iterations << ColumnBreak()
+        << stats.elapsedTimeInNanoseconds << ColumnBreak()
+        << average << ColumnBreak();
+}
+
+void ConsoleReporter::testCaseEnded(TestCaseStats const& _testCaseStats) {
+    m_tablePrinter->close();
+    StreamingReporterBase::testCaseEnded(_testCaseStats);
+    m_headerPrinted = false;
+}
+void ConsoleReporter::testGroupEnded(TestGroupStats const& _testGroupStats) {
+    if (currentGroupInfo.used) {
+        printSummaryDivider();
+        stream << "Summary for group '" << _testGroupStats.groupInfo.name << "':\n";
+        printTotals(_testGroupStats.totals);
+        stream << '\n' << std::endl;
+    }
+    StreamingReporterBase::testGroupEnded(_testGroupStats);
+}
+void ConsoleReporter::testRunEnded(TestRunStats const& _testRunStats) {
+    printTotalsDivider(_testRunStats.totals);
+    printTotals(_testRunStats.totals);
+    stream << std::endl;
+    StreamingReporterBase::testRunEnded(_testRunStats);
+}
+
+void ConsoleReporter::lazyPrint() {
+
+    m_tablePrinter->close();
+    lazyPrintWithoutClosingBenchmarkTable();
+}
+
+void ConsoleReporter::lazyPrintWithoutClosingBenchmarkTable() {
+
+    if (!currentTestRunInfo.used)
+        lazyPrintRunInfo();
+    if (!currentGroupInfo.used)
+        lazyPrintGroupInfo();
+
+    if (!m_headerPrinted) {
+        printTestCaseAndSectionHeader();
+        m_headerPrinted = true;
+    }
+}
+void ConsoleReporter::lazyPrintRunInfo() {
+    stream << '\n' << getLineOfChars<'~'>() << '\n';
+    Colour colour(Colour::SecondaryText);
+    stream << currentTestRunInfo->name
+        << " is a Catch v" << libraryVersion() << " host application.\n"
+        << "Run with -? for options\n\n";
+
+    if (m_config->rngSeed() != 0)
+        stream << "Randomness seeded to: " << m_config->rngSeed() << "\n\n";
+
+    currentTestRunInfo.used = true;
+}
+void ConsoleReporter::lazyPrintGroupInfo() {
+    if (!currentGroupInfo->name.empty() && currentGroupInfo->groupsCounts > 1) {
+        printClosedHeader("Group: " + currentGroupInfo->name);
+        currentGroupInfo.used = true;
+    }
+}
+void ConsoleReporter::printTestCaseAndSectionHeader() {
+    assert(!m_sectionStack.empty());
+    printOpenHeader(currentTestCaseInfo->name);
+
+    if (m_sectionStack.size() > 1) {
+        Colour colourGuard(Colour::Headers);
+
+        auto
+            it = m_sectionStack.begin() + 1, // Skip first section (test case)
+            itEnd = m_sectionStack.end();
+        for (; it != itEnd; ++it)
+            printHeaderString(it->name, 2);
+    }
+
+    SourceLineInfo lineInfo = m_sectionStack.back().lineInfo;
+
+    if (!lineInfo.empty()) {
+        stream << getLineOfChars<'-'>() << '\n';
+        Colour colourGuard(Colour::FileName);
+        stream << lineInfo << '\n';
+    }
+    stream << getLineOfChars<'.'>() << '\n' << std::endl;
+}
+
+void ConsoleReporter::printClosedHeader(std::string const& _name) {
+    printOpenHeader(_name);
+    stream << getLineOfChars<'.'>() << '\n';
+}
+void ConsoleReporter::printOpenHeader(std::string const& _name) {
+    stream << getLineOfChars<'-'>() << '\n';
+    {
+        Colour colourGuard(Colour::Headers);
+        printHeaderString(_name);
+    }
+}
+
+// if string has a : in first line will set indent to follow it on
+// subsequent lines
+void ConsoleReporter::printHeaderString(std::string const& _string, std::size_t indent) {
+    std::size_t i = _string.find(": ");
+    if (i != std::string::npos)
+        i += 2;
+    else
+        i = 0;
+    stream << Column(_string).indent(indent + i).initialIndent(indent) << '\n';
+}
+
+struct SummaryColumn {
+
+    SummaryColumn( std::string _label, Colour::Code _colour )
+    :   label( std::move( _label ) ),
+        colour( _colour ) {}
+    SummaryColumn addRow( std::size_t count ) {
+        ReusableStringStream rss;
+        rss << count;
+        std::string row = rss.str();
+        for (auto& oldRow : rows) {
+            while (oldRow.size() < row.size())
+                oldRow = ' ' + oldRow;
+            while (oldRow.size() > row.size())
+                row = ' ' + row;
+        }
+        rows.push_back(row);
+        return *this;
+    }
+
+    std::string label;
+    Colour::Code colour;
+    std::vector<std::string> rows;
+
+};
+
+void ConsoleReporter::printTotals( Totals const& totals ) {
+    if (totals.testCases.total() == 0) {
+        stream << Colour(Colour::Warning) << "No tests ran\n";
+    } else if (totals.assertions.total() > 0 && totals.testCases.allPassed()) {
+        stream << Colour(Colour::ResultSuccess) << "All tests passed";
+        stream << " ("
+            << pluralise(totals.assertions.passed, "assertion") << " in "
+            << pluralise(totals.testCases.passed, "test case") << ')'
+            << '\n';
+    } else {
+
+        std::vector<SummaryColumn> columns;
+        columns.push_back(SummaryColumn("", Colour::None)
+                          .addRow(totals.testCases.total())
+                          .addRow(totals.assertions.total()));
+        columns.push_back(SummaryColumn("passed", Colour::Success)
+                          .addRow(totals.testCases.passed)
+                          .addRow(totals.assertions.passed));
+        columns.push_back(SummaryColumn("failed", Colour::ResultError)
+                          .addRow(totals.testCases.failed)
+                          .addRow(totals.assertions.failed));
+        columns.push_back(SummaryColumn("failed as expected", Colour::ResultExpectedFailure)
+                          .addRow(totals.testCases.failedButOk)
+                          .addRow(totals.assertions.failedButOk));
+
+        printSummaryRow("test cases", columns, 0);
+        printSummaryRow("assertions", columns, 1);
+    }
+}
+void ConsoleReporter::printSummaryRow(std::string const& label, std::vector<SummaryColumn> const& cols, std::size_t row) {
+    for (auto col : cols) {
+        std::string value = col.rows[row];
+        if (col.label.empty()) {
+            stream << label << ": ";
+            if (value != "0")
+                stream << value;
+            else
+                stream << Colour(Colour::Warning) << "- none -";
+        } else if (value != "0") {
+            stream << Colour(Colour::LightGrey) << " | ";
+            stream << Colour(col.colour)
+                << value << ' ' << col.label;
+        }
+    }
+    stream << '\n';
+}
+
+void ConsoleReporter::printTotalsDivider(Totals const& totals) {
+    if (totals.testCases.total() > 0) {
+        std::size_t failedRatio = makeRatio(totals.testCases.failed, totals.testCases.total());
+        std::size_t failedButOkRatio = makeRatio(totals.testCases.failedButOk, totals.testCases.total());
+        std::size_t passedRatio = makeRatio(totals.testCases.passed, totals.testCases.total());
+        while (failedRatio + failedButOkRatio + passedRatio < CATCH_CONFIG_CONSOLE_WIDTH - 1)
+            findMax(failedRatio, failedButOkRatio, passedRatio)++;
+        while (failedRatio + failedButOkRatio + passedRatio > CATCH_CONFIG_CONSOLE_WIDTH - 1)
+            findMax(failedRatio, failedButOkRatio, passedRatio)--;
+
+        stream << Colour(Colour::Error) << std::string(failedRatio, '=');
+        stream << Colour(Colour::ResultExpectedFailure) << std::string(failedButOkRatio, '=');
+        if (totals.testCases.allPassed())
+            stream << Colour(Colour::ResultSuccess) << std::string(passedRatio, '=');
+        else
+            stream << Colour(Colour::Success) << std::string(passedRatio, '=');
+    } else {
+        stream << Colour(Colour::Warning) << std::string(CATCH_CONFIG_CONSOLE_WIDTH - 1, '=');
+    }
+    stream << '\n';
+}
+void ConsoleReporter::printSummaryDivider() {
+    stream << getLineOfChars<'-'>() << '\n';
+}
+
+CATCH_REGISTER_REPORTER("console", ConsoleReporter)
+
+} // end namespace Catch
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+// end catch_reporter_console.cpp
+// start catch_reporter_junit.cpp
+
+#include <cassert>
+#include <sstream>
+#include <ctime>
+#include <algorithm>
+
+namespace Catch {
+
+    namespace {
+        std::string getCurrentTimestamp() {
+            // Beware, this is not reentrant because of backward compatibility issues
+            // Also, UTC only, again because of backward compatibility (%z is C++11)
+            time_t rawtime;
+            std::time(&rawtime);
+            auto const timeStampSize = sizeof("2017-01-16T17:06:45Z");
+
+#ifdef _MSC_VER
+            std::tm timeInfo = {};
+            gmtime_s(&timeInfo, &rawtime);
+#else
+            std::tm* timeInfo;
+            timeInfo = std::gmtime(&rawtime);
+#endif
+
+            char timeStamp[timeStampSize];
+            const char * const fmt = "%Y-%m-%dT%H:%M:%SZ";
+
+#ifdef _MSC_VER
+            std::strftime(timeStamp, timeStampSize, fmt, &timeInfo);
+#else
+            std::strftime(timeStamp, timeStampSize, fmt, timeInfo);
+#endif
+            return std::string(timeStamp);
+        }
+
+        std::string fileNameTag(const std::vector<std::string> &tags) {
+            auto it = std::find_if(begin(tags),
+                                   end(tags),
+                                   [] (std::string const& tag) {return tag.front() == '#'; });
+            if (it != tags.end())
+                return it->substr(1);
+            return std::string();
+        }
+    } // anonymous namespace
+
+    JunitReporter::JunitReporter( ReporterConfig const& _config )
+        :   CumulativeReporterBase( _config ),
+            xml( _config.stream() )
+        {
+            m_reporterPrefs.shouldRedirectStdOut = true;
+            m_reporterPrefs.shouldReportAllAssertions = true;
+        }
+
+    JunitReporter::~JunitReporter() {}
+
+    std::string JunitReporter::getDescription() {
+        return "Reports test results in an XML format that looks like Ant's junitreport target";
+    }
+
+    void JunitReporter::noMatchingTestCases( std::string const& /*spec*/ ) {}
+
+    void JunitReporter::testRunStarting( TestRunInfo const& runInfo )  {
+        CumulativeReporterBase::testRunStarting( runInfo );
+        xml.startElement( "testsuites" );
+    }
+
+    void JunitReporter::testGroupStarting( GroupInfo const& groupInfo ) {
+        suiteTimer.start();
+        stdOutForSuite.clear();
+        stdErrForSuite.clear();
+        unexpectedExceptions = 0;
+        CumulativeReporterBase::testGroupStarting( groupInfo );
+    }
+
+    void JunitReporter::testCaseStarting( TestCaseInfo const& testCaseInfo ) {
+        m_okToFail = testCaseInfo.okToFail();
+    }
+
+    bool JunitReporter::assertionEnded( AssertionStats const& assertionStats ) {
+        if( assertionStats.assertionResult.getResultType() == ResultWas::ThrewException && !m_okToFail )
+            unexpectedExceptions++;
+        return CumulativeReporterBase::assertionEnded( assertionStats );
+    }
+
+    void JunitReporter::testCaseEnded( TestCaseStats const& testCaseStats ) {
+        stdOutForSuite += testCaseStats.stdOut;
+        stdErrForSuite += testCaseStats.stdErr;
+        CumulativeReporterBase::testCaseEnded( testCaseStats );
+    }
+
+    void JunitReporter::testGroupEnded( TestGroupStats const& testGroupStats ) {
+        double suiteTime = suiteTimer.getElapsedSeconds();
+        CumulativeReporterBase::testGroupEnded( testGroupStats );
+        writeGroup( *m_testGroups.back(), suiteTime );
+    }
+
+    void JunitReporter::testRunEndedCumulative() {
+        xml.endElement();
+    }
+
+    void JunitReporter::writeGroup( TestGroupNode const& groupNode, double suiteTime ) {
+        XmlWriter::ScopedElement e = xml.scopedElement( "testsuite" );
+        TestGroupStats const& stats = groupNode.value;
+        xml.writeAttribute( "name", stats.groupInfo.name );
+        xml.writeAttribute( "errors", unexpectedExceptions );
+        xml.writeAttribute( "failures", stats.totals.assertions.failed-unexpectedExceptions );
+        xml.writeAttribute( "tests", stats.totals.assertions.total() );
+        xml.writeAttribute( "hostname", "tbd" ); // !TBD
+        if( m_config->showDurations() == ShowDurations::Never )
+            xml.writeAttribute( "time", "" );
+        else
+            xml.writeAttribute( "time", suiteTime );
+        xml.writeAttribute( "timestamp", getCurrentTimestamp() );
+
+        // Write test cases
+        for( auto const& child : groupNode.children )
+            writeTestCase( *child );
+
+        xml.scopedElement( "system-out" ).writeText( trim( stdOutForSuite ), false );
+        xml.scopedElement( "system-err" ).writeText( trim( stdErrForSuite ), false );
+    }
+
+    void JunitReporter::writeTestCase( TestCaseNode const& testCaseNode ) {
+        TestCaseStats const& stats = testCaseNode.value;
+
+        // All test cases have exactly one section - which represents the
+        // test case itself. That section may have 0-n nested sections
+        assert( testCaseNode.children.size() == 1 );
+        SectionNode const& rootSection = *testCaseNode.children.front();
+
+        std::string className = stats.testInfo.className;
+
+        if( className.empty() ) {
+            className = fileNameTag(stats.testInfo.tags);
+            if ( className.empty() )
+                className = "global";
+        }
+
+        if ( !m_config->name().empty() )
+            className = m_config->name() + "." + className;
+
+        writeSection( className, "", rootSection );
+    }
+
+    void JunitReporter::writeSection(  std::string const& className,
+                        std::string const& rootName,
+                        SectionNode const& sectionNode ) {
+        std::string name = trim( sectionNode.stats.sectionInfo.name );
+        if( !rootName.empty() )
+            name = rootName + '/' + name;
+
+        if( !sectionNode.assertions.empty() ||
+            !sectionNode.stdOut.empty() ||
+            !sectionNode.stdErr.empty() ) {
+            XmlWriter::ScopedElement e = xml.scopedElement( "testcase" );
+            if( className.empty() ) {
+                xml.writeAttribute( "classname", name );
+                xml.writeAttribute( "name", "root" );
+            }
+            else {
+                xml.writeAttribute( "classname", className );
+                xml.writeAttribute( "name", name );
+            }
+            xml.writeAttribute( "time", ::Catch::Detail::stringify( sectionNode.stats.durationInSeconds ) );
+
+            writeAssertions( sectionNode );
+
+            if( !sectionNode.stdOut.empty() )
+                xml.scopedElement( "system-out" ).writeText( trim( sectionNode.stdOut ), false );
+            if( !sectionNode.stdErr.empty() )
+                xml.scopedElement( "system-err" ).writeText( trim( sectionNode.stdErr ), false );
+        }
+        for( auto const& childNode : sectionNode.childSections )
+            if( className.empty() )
+                writeSection( name, "", *childNode );
+            else
+                writeSection( className, name, *childNode );
+    }
+
+    void JunitReporter::writeAssertions( SectionNode const& sectionNode ) {
+        for( auto const& assertion : sectionNode.assertions )
+            writeAssertion( assertion );
+    }
+
+    void JunitReporter::writeAssertion( AssertionStats const& stats ) {
+        AssertionResult const& result = stats.assertionResult;
+        if( !result.isOk() ) {
+            std::string elementName;
+            switch( result.getResultType() ) {
+                case ResultWas::ThrewException:
+                case ResultWas::FatalErrorCondition:
+                    elementName = "error";
+                    break;
+                case ResultWas::ExplicitFailure:
+                    elementName = "failure";
+                    break;
+                case ResultWas::ExpressionFailed:
+                    elementName = "failure";
+                    break;
+                case ResultWas::DidntThrowException:
+                    elementName = "failure";
+                    break;
+
+                // We should never see these here:
+                case ResultWas::Info:
+                case ResultWas::Warning:
+                case ResultWas::Ok:
+                case ResultWas::Unknown:
+                case ResultWas::FailureBit:
+                case ResultWas::Exception:
+                    elementName = "internalError";
+                    break;
+            }
+
+            XmlWriter::ScopedElement e = xml.scopedElement( elementName );
+
+            xml.writeAttribute( "message", result.getExpandedExpression() );
+            xml.writeAttribute( "type", result.getTestMacroName() );
+
+            ReusableStringStream rss;
+            if( !result.getMessage().empty() )
+                rss << result.getMessage() << '\n';
+            for( auto const& msg : stats.infoMessages )
+                if( msg.type == ResultWas::Info )
+                    rss << msg.message << '\n';
+
+            rss << "at " << result.getSourceInfo();
+            xml.writeText( rss.str(), false );
+        }
+    }
+
+    CATCH_REGISTER_REPORTER( "junit", JunitReporter )
+
+} // end namespace Catch
+// end catch_reporter_junit.cpp
+// start catch_reporter_listening.cpp
+
+#include <cassert>
+
+namespace Catch {
+
+    ListeningReporter::ListeningReporter() {
+        // We will assume that listeners will always want all assertions
+        m_preferences.shouldReportAllAssertions = true;
+    }
+
+    void ListeningReporter::addListener( IStreamingReporterPtr&& listener ) {
+        m_listeners.push_back( std::move( listener ) );
+    }
+
+    void ListeningReporter::addReporter(IStreamingReporterPtr&& reporter) {
+        assert(!m_reporter && "Listening reporter can wrap only 1 real reporter");
+        m_reporter = std::move( reporter );
+        m_preferences.shouldRedirectStdOut = m_reporter->getPreferences().shouldRedirectStdOut;
+    }
+
+    ReporterPreferences ListeningReporter::getPreferences() const {
+        return m_preferences;
+    }
+
+    std::set<Verbosity> ListeningReporter::getSupportedVerbosities() {
+        return std::set<Verbosity>{ };
+    }
+
+    void ListeningReporter::noMatchingTestCases( std::string const& spec ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->noMatchingTestCases( spec );
+        }
+        m_reporter->noMatchingTestCases( spec );
+    }
+
+    void ListeningReporter::benchmarkStarting( BenchmarkInfo const& benchmarkInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->benchmarkStarting( benchmarkInfo );
+        }
+        m_reporter->benchmarkStarting( benchmarkInfo );
+    }
+    void ListeningReporter::benchmarkEnded( BenchmarkStats const& benchmarkStats ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->benchmarkEnded( benchmarkStats );
+        }
+        m_reporter->benchmarkEnded( benchmarkStats );
+    }
+
+    void ListeningReporter::testRunStarting( TestRunInfo const& testRunInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testRunStarting( testRunInfo );
+        }
+        m_reporter->testRunStarting( testRunInfo );
+    }
+
+    void ListeningReporter::testGroupStarting( GroupInfo const& groupInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testGroupStarting( groupInfo );
+        }
+        m_reporter->testGroupStarting( groupInfo );
+    }
+
+    void ListeningReporter::testCaseStarting( TestCaseInfo const& testInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testCaseStarting( testInfo );
+        }
+        m_reporter->testCaseStarting( testInfo );
+    }
+
+    void ListeningReporter::sectionStarting( SectionInfo const& sectionInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->sectionStarting( sectionInfo );
+        }
+        m_reporter->sectionStarting( sectionInfo );
+    }
+
+    void ListeningReporter::assertionStarting( AssertionInfo const& assertionInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->assertionStarting( assertionInfo );
+        }
+        m_reporter->assertionStarting( assertionInfo );
+    }
+
+    // The return value indicates if the messages buffer should be cleared:
+    bool ListeningReporter::assertionEnded( AssertionStats const& assertionStats ) {
+        for( auto const& listener : m_listeners ) {
+            static_cast<void>( listener->assertionEnded( assertionStats ) );
+        }
+        return m_reporter->assertionEnded( assertionStats );
+    }
+
+    void ListeningReporter::sectionEnded( SectionStats const& sectionStats ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->sectionEnded( sectionStats );
+        }
+        m_reporter->sectionEnded( sectionStats );
+    }
+
+    void ListeningReporter::testCaseEnded( TestCaseStats const& testCaseStats ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testCaseEnded( testCaseStats );
+        }
+        m_reporter->testCaseEnded( testCaseStats );
+    }
+
+    void ListeningReporter::testGroupEnded( TestGroupStats const& testGroupStats ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testGroupEnded( testGroupStats );
+        }
+        m_reporter->testGroupEnded( testGroupStats );
+    }
+
+    void ListeningReporter::testRunEnded( TestRunStats const& testRunStats ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->testRunEnded( testRunStats );
+        }
+        m_reporter->testRunEnded( testRunStats );
+    }
+
+    void ListeningReporter::skipTest( TestCaseInfo const& testInfo ) {
+        for ( auto const& listener : m_listeners ) {
+            listener->skipTest( testInfo );
+        }
+        m_reporter->skipTest( testInfo );
+    }
+
+    bool ListeningReporter::isMulti() const {
+        return true;
+    }
+
+} // end namespace Catch
+// end catch_reporter_listening.cpp
+// start catch_reporter_xml.cpp
+
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable:4061) // Not all labels are EXPLICITLY handled in switch
+                              // Note that 4062 (not all labels are handled
+                              // and default is missing) is enabled
+#endif
+
+namespace Catch {
+    XmlReporter::XmlReporter( ReporterConfig const& _config )
+    :   StreamingReporterBase( _config ),
+        m_xml(_config.stream())
+    {
+        m_reporterPrefs.shouldRedirectStdOut = true;
+        m_reporterPrefs.shouldReportAllAssertions = true;
+    }
+
+    XmlReporter::~XmlReporter() = default;
+
+    std::string XmlReporter::getDescription() {
+        return "Reports test results as an XML document";
+    }
+
+    std::string XmlReporter::getStylesheetRef() const {
+        return std::string();
+    }
+
+    void XmlReporter::writeSourceInfo( SourceLineInfo const& sourceInfo ) {
+        m_xml
+            .writeAttribute( "filename", sourceInfo.file )
+            .writeAttribute( "line", sourceInfo.line );
+    }
+
+    void XmlReporter::noMatchingTestCases( std::string const& s ) {
+        StreamingReporterBase::noMatchingTestCases( s );
+    }
+
+    void XmlReporter::testRunStarting( TestRunInfo const& testInfo ) {
+        StreamingReporterBase::testRunStarting( testInfo );
+        std::string stylesheetRef = getStylesheetRef();
+        if( !stylesheetRef.empty() )
+            m_xml.writeStylesheetRef( stylesheetRef );
+        m_xml.startElement( "Catch" );
+        if( !m_config->name().empty() )
+            m_xml.writeAttribute( "name", m_config->name() );
+        if( m_config->rngSeed() != 0 )
+            m_xml.scopedElement( "Randomness" )
+                .writeAttribute( "seed", m_config->rngSeed() );
+    }
+
+    void XmlReporter::testGroupStarting( GroupInfo const& groupInfo ) {
+        StreamingReporterBase::testGroupStarting( groupInfo );
+        m_xml.startElement( "Group" )
+            .writeAttribute( "name", groupInfo.name );
+    }
+
+    void XmlReporter::testCaseStarting( TestCaseInfo const& testInfo ) {
+        StreamingReporterBase::testCaseStarting(testInfo);
+        m_xml.startElement( "TestCase" )
+            .writeAttribute( "name", trim( testInfo.name ) )
+            .writeAttribute( "description", testInfo.description )
+            .writeAttribute( "tags", testInfo.tagsAsString() );
+
+        writeSourceInfo( testInfo.lineInfo );
+
+        if ( m_config->showDurations() == ShowDurations::Always )
+            m_testCaseTimer.start();
+        m_xml.ensureTagClosed();
+    }
+
+    void XmlReporter::sectionStarting( SectionInfo const& sectionInfo ) {
+        StreamingReporterBase::sectionStarting( sectionInfo );
+        if( m_sectionDepth++ > 0 ) {
+            m_xml.startElement( "Section" )
+                .writeAttribute( "name", trim( sectionInfo.name ) );
+            writeSourceInfo( sectionInfo.lineInfo );
+            m_xml.ensureTagClosed();
+        }
+    }
+
+    void XmlReporter::assertionStarting( AssertionInfo const& ) { }
+
+    bool XmlReporter::assertionEnded( AssertionStats const& assertionStats ) {
+
+        AssertionResult const& result = assertionStats.assertionResult;
+
+        bool includeResults = m_config->includeSuccessfulResults() || !result.isOk();
+
+        if( includeResults || result.getResultType() == ResultWas::Warning ) {
+            // Print any info messages in <Info> tags.
+            for( auto const& msg : assertionStats.infoMessages ) {
+                if( msg.type == ResultWas::Info && includeResults ) {
+                    m_xml.scopedElement( "Info" )
+                            .writeText( msg.message );
+                } else if ( msg.type == ResultWas::Warning ) {
+                    m_xml.scopedElement( "Warning" )
+                            .writeText( msg.message );
+                }
+            }
+        }
+
+        // Drop out if result was successful but we're not printing them.
+        if( !includeResults && result.getResultType() != ResultWas::Warning )
+            return true;
+
+        // Print the expression if there is one.
+        if( result.hasExpression() ) {
+            m_xml.startElement( "Expression" )
+                .writeAttribute( "success", result.succeeded() )
+                .writeAttribute( "type", result.getTestMacroName() );
+
+            writeSourceInfo( result.getSourceInfo() );
+
+            m_xml.scopedElement( "Original" )
+                .writeText( result.getExpression() );
+            m_xml.scopedElement( "Expanded" )
+                .writeText( result.getExpandedExpression() );
+        }
+
+        // And... Print a result applicable to each result type.
+        switch( result.getResultType() ) {
+            case ResultWas::ThrewException:
+                m_xml.startElement( "Exception" );
+                writeSourceInfo( result.getSourceInfo() );
+                m_xml.writeText( result.getMessage() );
+                m_xml.endElement();
+                break;
+            case ResultWas::FatalErrorCondition:
+                m_xml.startElement( "FatalErrorCondition" );
+                writeSourceInfo( result.getSourceInfo() );
+                m_xml.writeText( result.getMessage() );
+                m_xml.endElement();
+                break;
+            case ResultWas::Info:
+                m_xml.scopedElement( "Info" )
+                    .writeText( result.getMessage() );
+                break;
+            case ResultWas::Warning:
+                // Warning will already have been written
+                break;
+            case ResultWas::ExplicitFailure:
+                m_xml.startElement( "Failure" );
+                writeSourceInfo( result.getSourceInfo() );
+                m_xml.writeText( result.getMessage() );
+                m_xml.endElement();
+                break;
+            default:
+                break;
+        }
+
+        if( result.hasExpression() )
+            m_xml.endElement();
+
+        return true;
+    }
+
+    void XmlReporter::sectionEnded( SectionStats const& sectionStats ) {
+        StreamingReporterBase::sectionEnded( sectionStats );
+        if( --m_sectionDepth > 0 ) {
+            XmlWriter::ScopedElement e = m_xml.scopedElement( "OverallResults" );
+            e.writeAttribute( "successes", sectionStats.assertions.passed );
+            e.writeAttribute( "failures", sectionStats.assertions.failed );
+            e.writeAttribute( "expectedFailures", sectionStats.assertions.failedButOk );
+
+            if ( m_config->showDurations() == ShowDurations::Always )
+                e.writeAttribute( "durationInSeconds", sectionStats.durationInSeconds );
+
+            m_xml.endElement();
+        }
+    }
+
+    void XmlReporter::testCaseEnded( TestCaseStats const& testCaseStats ) {
+        StreamingReporterBase::testCaseEnded( testCaseStats );
+        XmlWriter::ScopedElement e = m_xml.scopedElement( "OverallResult" );
+        e.writeAttribute( "success", testCaseStats.totals.assertions.allOk() );
+
+        if ( m_config->showDurations() == ShowDurations::Always )
+            e.writeAttribute( "durationInSeconds", m_testCaseTimer.getElapsedSeconds() );
+
+        if( !testCaseStats.stdOut.empty() )
+            m_xml.scopedElement( "StdOut" ).writeText( trim( testCaseStats.stdOut ), false );
+        if( !testCaseStats.stdErr.empty() )
+            m_xml.scopedElement( "StdErr" ).writeText( trim( testCaseStats.stdErr ), false );
+
+        m_xml.endElement();
+    }
+
+    void XmlReporter::testGroupEnded( TestGroupStats const& testGroupStats ) {
+        StreamingReporterBase::testGroupEnded( testGroupStats );
+        // TODO: Check testGroupStats.aborting and act accordingly.
+        m_xml.scopedElement( "OverallResults" )
+            .writeAttribute( "successes", testGroupStats.totals.assertions.passed )
+            .writeAttribute( "failures", testGroupStats.totals.assertions.failed )
+            .writeAttribute( "expectedFailures", testGroupStats.totals.assertions.failedButOk );
+        m_xml.endElement();
+    }
+
+    void XmlReporter::testRunEnded( TestRunStats const& testRunStats ) {
+        StreamingReporterBase::testRunEnded( testRunStats );
+        m_xml.scopedElement( "OverallResults" )
+            .writeAttribute( "successes", testRunStats.totals.assertions.passed )
+            .writeAttribute( "failures", testRunStats.totals.assertions.failed )
+            .writeAttribute( "expectedFailures", testRunStats.totals.assertions.failedButOk );
+        m_xml.endElement();
+    }
+
+    CATCH_REGISTER_REPORTER( "xml", XmlReporter )
+
+} // end namespace Catch
+
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+// end catch_reporter_xml.cpp
+
+namespace Catch {
+    LeakDetector leakDetector;
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// end catch_impl.hpp
+#endif
+
+#ifdef CATCH_CONFIG_MAIN
+// start catch_default_main.hpp
+
+#ifndef __OBJC__
+
+#if defined(CATCH_CONFIG_WCHAR) && defined(WIN32) && defined(_UNICODE) && !defined(DO_NOT_USE_WMAIN)
+// Standard C/C++ Win32 Unicode wmain entry point
+extern "C" int wmain (int argc, wchar_t * argv[], wchar_t * []) {
+#else
+// Standard C/C++ main entry point
+int main (int argc, char * argv[]) {
+#endif
+
+    return Catch::Session().run( argc, argv );
+}
+
+#else // __OBJC__
+
+// Objective-C entry point
+int main (int argc, char * const argv[]) {
+#if !CATCH_ARC_ENABLED
+    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+#endif
+
+    Catch::registerTestMethods();
+    int result = Catch::Session().run( argc, (char**)argv );
+
+#if !CATCH_ARC_ENABLED
+    [pool drain];
+#endif
+
+    return result;
+}
+
+#endif // __OBJC__
+
+// end catch_default_main.hpp
+#endif
+
+#if !defined(CATCH_CONFIG_IMPL_ONLY)
+
+#ifdef CLARA_CONFIG_MAIN_NOT_DEFINED
+#  undef CLARA_CONFIG_MAIN
+#endif
+
+#if !defined(CATCH_CONFIG_DISABLE)
+//////
+// If this config identifier is defined then all CATCH macros are prefixed with CATCH_
+#ifdef CATCH_CONFIG_PREFIX_ALL
+
+#define CATCH_REQUIRE( ... ) INTERNAL_CATCH_TEST( "CATCH_REQUIRE", Catch::ResultDisposition::Normal, __VA_ARGS__ )
+#define CATCH_REQUIRE_FALSE( ... ) INTERNAL_CATCH_TEST( "CATCH_REQUIRE_FALSE", Catch::ResultDisposition::Normal | Catch::ResultDisposition::FalseTest, __VA_ARGS__ )
+
+#define CATCH_REQUIRE_THROWS( ... ) INTERNAL_CATCH_THROWS( "CATCH_REQUIRE_THROWS", Catch::ResultDisposition::Normal, "", __VA_ARGS__ )
+#define CATCH_REQUIRE_THROWS_AS( expr, exceptionType ) INTERNAL_CATCH_THROWS_AS( "CATCH_REQUIRE_THROWS_AS", exceptionType, Catch::ResultDisposition::Normal, expr )
+#define CATCH_REQUIRE_THROWS_WITH( expr, matcher ) INTERNAL_CATCH_THROWS_STR_MATCHES( "CATCH_REQUIRE_THROWS_WITH", Catch::ResultDisposition::Normal, matcher, expr )
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_REQUIRE_THROWS_MATCHES( expr, exceptionType, matcher ) INTERNAL_CATCH_THROWS_MATCHES( "CATCH_REQUIRE_THROWS_MATCHES", exceptionType, Catch::ResultDisposition::Normal, matcher, expr )
+#endif// CATCH_CONFIG_DISABLE_MATCHERS
+#define CATCH_REQUIRE_NOTHROW( ... ) INTERNAL_CATCH_NO_THROW( "CATCH_REQUIRE_NOTHROW", Catch::ResultDisposition::Normal, __VA_ARGS__ )
+
+#define CATCH_CHECK( ... ) INTERNAL_CATCH_TEST( "CATCH_CHECK", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CATCH_CHECK_FALSE( ... ) INTERNAL_CATCH_TEST( "CATCH_CHECK_FALSE", Catch::ResultDisposition::ContinueOnFailure | Catch::ResultDisposition::FalseTest, __VA_ARGS__ )
+#define CATCH_CHECKED_IF( ... ) INTERNAL_CATCH_IF( "CATCH_CHECKED_IF", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CATCH_CHECKED_ELSE( ... ) INTERNAL_CATCH_ELSE( "CATCH_CHECKED_ELSE", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CATCH_CHECK_NOFAIL( ... ) INTERNAL_CATCH_TEST( "CATCH_CHECK_NOFAIL", Catch::ResultDisposition::ContinueOnFailure | Catch::ResultDisposition::SuppressFail, __VA_ARGS__ )
+
+#define CATCH_CHECK_THROWS( ... )  INTERNAL_CATCH_THROWS( "CATCH_CHECK_THROWS", Catch::ResultDisposition::ContinueOnFailure, "", __VA_ARGS__ )
+#define CATCH_CHECK_THROWS_AS( expr, exceptionType ) INTERNAL_CATCH_THROWS_AS( "CATCH_CHECK_THROWS_AS", exceptionType, Catch::ResultDisposition::ContinueOnFailure, expr )
+#define CATCH_CHECK_THROWS_WITH( expr, matcher ) INTERNAL_CATCH_THROWS_STR_MATCHES( "CATCH_CHECK_THROWS_WITH", Catch::ResultDisposition::ContinueOnFailure, matcher, expr )
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_CHECK_THROWS_MATCHES( expr, exceptionType, matcher ) INTERNAL_CATCH_THROWS_MATCHES( "CATCH_CHECK_THROWS_MATCHES", exceptionType, Catch::ResultDisposition::ContinueOnFailure, matcher, expr )
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define CATCH_CHECK_NOTHROW( ... ) INTERNAL_CATCH_NO_THROW( "CATCH_CHECK_NOTHROW", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_CHECK_THAT( arg, matcher ) INTERNAL_CHECK_THAT( "CATCH_CHECK_THAT", matcher, Catch::ResultDisposition::ContinueOnFailure, arg )
+
+#define CATCH_REQUIRE_THAT( arg, matcher ) INTERNAL_CHECK_THAT( "CATCH_REQUIRE_THAT", matcher, Catch::ResultDisposition::Normal, arg )
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+
+#define CATCH_INFO( msg ) INTERNAL_CATCH_INFO( "CATCH_INFO", msg )
+#define CATCH_WARN( msg ) INTERNAL_CATCH_MSG( "CATCH_WARN", Catch::ResultWas::Warning, Catch::ResultDisposition::ContinueOnFailure, msg )
+#define CATCH_CAPTURE( ... ) INTERNAL_CATCH_CAPTURE( INTERNAL_CATCH_UNIQUE_NAME(capturer), "CATCH_CAPTURE",__VA_ARGS__ )
+
+#define CATCH_TEST_CASE( ... ) INTERNAL_CATCH_TESTCASE( __VA_ARGS__ )
+#define CATCH_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEST_CASE_METHOD( className, __VA_ARGS__ )
+#define CATCH_METHOD_AS_TEST_CASE( method, ... ) INTERNAL_CATCH_METHOD_AS_TEST_CASE( method, __VA_ARGS__ )
+#define CATCH_REGISTER_TEST_CASE( Function, ... ) INTERNAL_CATCH_REGISTER_TESTCASE( Function, __VA_ARGS__ )
+#define CATCH_SECTION( ... ) INTERNAL_CATCH_SECTION( __VA_ARGS__ )
+#define CATCH_DYNAMIC_SECTION( ... ) INTERNAL_CATCH_DYNAMIC_SECTION( __VA_ARGS__ )
+#define CATCH_FAIL( ... ) INTERNAL_CATCH_MSG( "CATCH_FAIL", Catch::ResultWas::ExplicitFailure, Catch::ResultDisposition::Normal, __VA_ARGS__ )
+#define CATCH_FAIL_CHECK( ... ) INTERNAL_CATCH_MSG( "CATCH_FAIL_CHECK", Catch::ResultWas::ExplicitFailure, Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CATCH_SUCCEED( ... ) INTERNAL_CATCH_MSG( "CATCH_SUCCEED", Catch::ResultWas::Ok, Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+
+#define CATCH_ANON_TEST_CASE() INTERNAL_CATCH_TESTCASE()
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define CATCH_TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE( __VA_ARGS__ )
+#define CATCH_TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( className, __VA_ARGS__ )
+#else
+#define CATCH_TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE( __VA_ARGS__ ) )
+#define CATCH_TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( className, __VA_ARGS__ ) )
+#endif
+
+#if !defined(CATCH_CONFIG_RUNTIME_STATIC_REQUIRE)
+#define CATCH_STATIC_REQUIRE( ... )       static_assert(   __VA_ARGS__ ,      #__VA_ARGS__ );     CATCH_SUCCEED( #__VA_ARGS__ )
+#define CATCH_STATIC_REQUIRE_FALSE( ... ) static_assert( !(__VA_ARGS__), "!(" #__VA_ARGS__ ")" ); CATCH_SUCCEED( #__VA_ARGS__ )
+#else
+#define CATCH_STATIC_REQUIRE( ... )       CATCH_REQUIRE( __VA_ARGS__ )
+#define CATCH_STATIC_REQUIRE_FALSE( ... ) CATCH_REQUIRE_FALSE( __VA_ARGS__ )
+#endif
+
+// "BDD-style" convenience wrappers
+#define CATCH_SCENARIO( ... ) CATCH_TEST_CASE( "Scenario: " __VA_ARGS__ )
+#define CATCH_SCENARIO_METHOD( className, ... ) INTERNAL_CATCH_TEST_CASE_METHOD( className, "Scenario: " __VA_ARGS__ )
+#define CATCH_GIVEN( desc )     INTERNAL_CATCH_DYNAMIC_SECTION( "    Given: " << desc )
+#define CATCH_AND_GIVEN( desc ) INTERNAL_CATCH_DYNAMIC_SECTION( "And given: " << desc )
+#define CATCH_WHEN( desc )      INTERNAL_CATCH_DYNAMIC_SECTION( "     When: " << desc )
+#define CATCH_AND_WHEN( desc )  INTERNAL_CATCH_DYNAMIC_SECTION( " And when: " << desc )
+#define CATCH_THEN( desc )      INTERNAL_CATCH_DYNAMIC_SECTION( "     Then: " << desc )
+#define CATCH_AND_THEN( desc )  INTERNAL_CATCH_DYNAMIC_SECTION( "      And: " << desc )
+
+// If CATCH_CONFIG_PREFIX_ALL is not defined then the CATCH_ prefix is not required
+#else
+
+#define REQUIRE( ... ) INTERNAL_CATCH_TEST( "REQUIRE", Catch::ResultDisposition::Normal, __VA_ARGS__  )
+#define REQUIRE_FALSE( ... ) INTERNAL_CATCH_TEST( "REQUIRE_FALSE", Catch::ResultDisposition::Normal | Catch::ResultDisposition::FalseTest, __VA_ARGS__ )
+
+#define REQUIRE_THROWS( ... ) INTERNAL_CATCH_THROWS( "REQUIRE_THROWS", Catch::ResultDisposition::Normal, __VA_ARGS__ )
+#define REQUIRE_THROWS_AS( expr, exceptionType ) INTERNAL_CATCH_THROWS_AS( "REQUIRE_THROWS_AS", exceptionType, Catch::ResultDisposition::Normal, expr )
+#define REQUIRE_THROWS_WITH( expr, matcher ) INTERNAL_CATCH_THROWS_STR_MATCHES( "REQUIRE_THROWS_WITH", Catch::ResultDisposition::Normal, matcher, expr )
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define REQUIRE_THROWS_MATCHES( expr, exceptionType, matcher ) INTERNAL_CATCH_THROWS_MATCHES( "REQUIRE_THROWS_MATCHES", exceptionType, Catch::ResultDisposition::Normal, matcher, expr )
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define REQUIRE_NOTHROW( ... ) INTERNAL_CATCH_NO_THROW( "REQUIRE_NOTHROW", Catch::ResultDisposition::Normal, __VA_ARGS__ )
+
+#define CHECK( ... ) INTERNAL_CATCH_TEST( "CHECK", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CHECK_FALSE( ... ) INTERNAL_CATCH_TEST( "CHECK_FALSE", Catch::ResultDisposition::ContinueOnFailure | Catch::ResultDisposition::FalseTest, __VA_ARGS__ )
+#define CHECKED_IF( ... ) INTERNAL_CATCH_IF( "CHECKED_IF", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CHECKED_ELSE( ... ) INTERNAL_CATCH_ELSE( "CHECKED_ELSE", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CHECK_NOFAIL( ... ) INTERNAL_CATCH_TEST( "CHECK_NOFAIL", Catch::ResultDisposition::ContinueOnFailure | Catch::ResultDisposition::SuppressFail, __VA_ARGS__ )
+
+#define CHECK_THROWS( ... )  INTERNAL_CATCH_THROWS( "CHECK_THROWS", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define CHECK_THROWS_AS( expr, exceptionType ) INTERNAL_CATCH_THROWS_AS( "CHECK_THROWS_AS", exceptionType, Catch::ResultDisposition::ContinueOnFailure, expr )
+#define CHECK_THROWS_WITH( expr, matcher ) INTERNAL_CATCH_THROWS_STR_MATCHES( "CHECK_THROWS_WITH", Catch::ResultDisposition::ContinueOnFailure, matcher, expr )
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CHECK_THROWS_MATCHES( expr, exceptionType, matcher ) INTERNAL_CATCH_THROWS_MATCHES( "CHECK_THROWS_MATCHES", exceptionType, Catch::ResultDisposition::ContinueOnFailure, matcher, expr )
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define CHECK_NOTHROW( ... ) INTERNAL_CATCH_NO_THROW( "CHECK_NOTHROW", Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CHECK_THAT( arg, matcher ) INTERNAL_CHECK_THAT( "CHECK_THAT", matcher, Catch::ResultDisposition::ContinueOnFailure, arg )
+
+#define REQUIRE_THAT( arg, matcher ) INTERNAL_CHECK_THAT( "REQUIRE_THAT", matcher, Catch::ResultDisposition::Normal, arg )
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+
+#define INFO( msg ) INTERNAL_CATCH_INFO( "INFO", msg )
+#define WARN( msg ) INTERNAL_CATCH_MSG( "WARN", Catch::ResultWas::Warning, Catch::ResultDisposition::ContinueOnFailure, msg )
+#define CAPTURE( ... ) INTERNAL_CATCH_CAPTURE( INTERNAL_CATCH_UNIQUE_NAME(capturer), "CAPTURE",__VA_ARGS__ )
+
+#define TEST_CASE( ... ) INTERNAL_CATCH_TESTCASE( __VA_ARGS__ )
+#define TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEST_CASE_METHOD( className, __VA_ARGS__ )
+#define METHOD_AS_TEST_CASE( method, ... ) INTERNAL_CATCH_METHOD_AS_TEST_CASE( method, __VA_ARGS__ )
+#define REGISTER_TEST_CASE( Function, ... ) INTERNAL_CATCH_REGISTER_TESTCASE( Function, __VA_ARGS__ )
+#define SECTION( ... ) INTERNAL_CATCH_SECTION( __VA_ARGS__ )
+#define DYNAMIC_SECTION( ... ) INTERNAL_CATCH_DYNAMIC_SECTION( __VA_ARGS__ )
+#define FAIL( ... ) INTERNAL_CATCH_MSG( "FAIL", Catch::ResultWas::ExplicitFailure, Catch::ResultDisposition::Normal, __VA_ARGS__ )
+#define FAIL_CHECK( ... ) INTERNAL_CATCH_MSG( "FAIL_CHECK", Catch::ResultWas::ExplicitFailure, Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define SUCCEED( ... ) INTERNAL_CATCH_MSG( "SUCCEED", Catch::ResultWas::Ok, Catch::ResultDisposition::ContinueOnFailure, __VA_ARGS__ )
+#define ANON_TEST_CASE() INTERNAL_CATCH_TESTCASE()
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE( __VA_ARGS__ )
+#define TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( className, __VA_ARGS__ )
+#else
+#define TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE( __VA_ARGS__ ) )
+#define TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD( className, __VA_ARGS__ ) )
+#endif
+
+#if !defined(CATCH_CONFIG_RUNTIME_STATIC_REQUIRE)
+#define STATIC_REQUIRE( ... )       static_assert(   __VA_ARGS__,  #__VA_ARGS__ ); SUCCEED( #__VA_ARGS__ )
+#define STATIC_REQUIRE_FALSE( ... ) static_assert( !(__VA_ARGS__), "!(" #__VA_ARGS__ ")" ); SUCCEED( "!(" #__VA_ARGS__ ")" )
+#else
+#define STATIC_REQUIRE( ... )       REQUIRE( __VA_ARGS__ )
+#define STATIC_REQUIRE_FALSE( ... ) REQUIRE_FALSE( __VA_ARGS__ )
+#endif
+
+#endif
+
+#define CATCH_TRANSLATE_EXCEPTION( signature ) INTERNAL_CATCH_TRANSLATE_EXCEPTION( signature )
+
+// "BDD-style" convenience wrappers
+#define SCENARIO( ... ) TEST_CASE( "Scenario: " __VA_ARGS__ )
+#define SCENARIO_METHOD( className, ... ) INTERNAL_CATCH_TEST_CASE_METHOD( className, "Scenario: " __VA_ARGS__ )
+
+#define GIVEN( desc )     INTERNAL_CATCH_DYNAMIC_SECTION( "    Given: " << desc )
+#define AND_GIVEN( desc ) INTERNAL_CATCH_DYNAMIC_SECTION( "And given: " << desc )
+#define WHEN( desc )      INTERNAL_CATCH_DYNAMIC_SECTION( "     When: " << desc )
+#define AND_WHEN( desc )  INTERNAL_CATCH_DYNAMIC_SECTION( " And when: " << desc )
+#define THEN( desc )      INTERNAL_CATCH_DYNAMIC_SECTION( "     Then: " << desc )
+#define AND_THEN( desc )  INTERNAL_CATCH_DYNAMIC_SECTION( "      And: " << desc )
+
+using Catch::Detail::Approx;
+
+#else // CATCH_CONFIG_DISABLE
+
+//////
+// If this config identifier is defined then all CATCH macros are prefixed with CATCH_
+#ifdef CATCH_CONFIG_PREFIX_ALL
+
+#define CATCH_REQUIRE( ... )        (void)(0)
+#define CATCH_REQUIRE_FALSE( ... )  (void)(0)
+
+#define CATCH_REQUIRE_THROWS( ... ) (void)(0)
+#define CATCH_REQUIRE_THROWS_AS( expr, exceptionType ) (void)(0)
+#define CATCH_REQUIRE_THROWS_WITH( expr, matcher )     (void)(0)
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_REQUIRE_THROWS_MATCHES( expr, exceptionType, matcher ) (void)(0)
+#endif// CATCH_CONFIG_DISABLE_MATCHERS
+#define CATCH_REQUIRE_NOTHROW( ... ) (void)(0)
+
+#define CATCH_CHECK( ... )         (void)(0)
+#define CATCH_CHECK_FALSE( ... )   (void)(0)
+#define CATCH_CHECKED_IF( ... )    if (__VA_ARGS__)
+#define CATCH_CHECKED_ELSE( ... )  if (!(__VA_ARGS__))
+#define CATCH_CHECK_NOFAIL( ... )  (void)(0)
+
+#define CATCH_CHECK_THROWS( ... )  (void)(0)
+#define CATCH_CHECK_THROWS_AS( expr, exceptionType ) (void)(0)
+#define CATCH_CHECK_THROWS_WITH( expr, matcher )     (void)(0)
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_CHECK_THROWS_MATCHES( expr, exceptionType, matcher ) (void)(0)
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define CATCH_CHECK_NOTHROW( ... ) (void)(0)
+
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CATCH_CHECK_THAT( arg, matcher )   (void)(0)
+
+#define CATCH_REQUIRE_THAT( arg, matcher ) (void)(0)
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+
+#define CATCH_INFO( msg )    (void)(0)
+#define CATCH_WARN( msg )    (void)(0)
+#define CATCH_CAPTURE( msg ) (void)(0)
+
+#define CATCH_TEST_CASE( ... ) INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+#define CATCH_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+#define CATCH_METHOD_AS_TEST_CASE( method, ... )
+#define CATCH_REGISTER_TEST_CASE( Function, ... ) (void)(0)
+#define CATCH_SECTION( ... )
+#define CATCH_DYNAMIC_SECTION( ... )
+#define CATCH_FAIL( ... ) (void)(0)
+#define CATCH_FAIL_CHECK( ... ) (void)(0)
+#define CATCH_SUCCEED( ... ) (void)(0)
+
+#define CATCH_ANON_TEST_CASE() INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define CATCH_TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) )
+#define CATCH_TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), className )
+#else
+#define CATCH_TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) ) )
+#define CATCH_TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), className ) )
+#endif
+
+// "BDD-style" convenience wrappers
+#define CATCH_SCENARIO( ... ) INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+#define CATCH_SCENARIO_METHOD( className, ... ) INTERNAL_CATCH_TESTCASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ), className )
+#define CATCH_GIVEN( desc )
+#define CATCH_AND_GIVEN( desc )
+#define CATCH_WHEN( desc )
+#define CATCH_AND_WHEN( desc )
+#define CATCH_THEN( desc )
+#define CATCH_AND_THEN( desc )
+
+#define CATCH_STATIC_REQUIRE( ... )       (void)(0)
+#define CATCH_STATIC_REQUIRE_FALSE( ... ) (void)(0)
+
+// If CATCH_CONFIG_PREFIX_ALL is not defined then the CATCH_ prefix is not required
+#else
+
+#define REQUIRE( ... )       (void)(0)
+#define REQUIRE_FALSE( ... ) (void)(0)
+
+#define REQUIRE_THROWS( ... ) (void)(0)
+#define REQUIRE_THROWS_AS( expr, exceptionType ) (void)(0)
+#define REQUIRE_THROWS_WITH( expr, matcher ) (void)(0)
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define REQUIRE_THROWS_MATCHES( expr, exceptionType, matcher ) (void)(0)
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define REQUIRE_NOTHROW( ... ) (void)(0)
+
+#define CHECK( ... ) (void)(0)
+#define CHECK_FALSE( ... ) (void)(0)
+#define CHECKED_IF( ... ) if (__VA_ARGS__)
+#define CHECKED_ELSE( ... ) if (!(__VA_ARGS__))
+#define CHECK_NOFAIL( ... ) (void)(0)
+
+#define CHECK_THROWS( ... )  (void)(0)
+#define CHECK_THROWS_AS( expr, exceptionType ) (void)(0)
+#define CHECK_THROWS_WITH( expr, matcher ) (void)(0)
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CHECK_THROWS_MATCHES( expr, exceptionType, matcher ) (void)(0)
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+#define CHECK_NOTHROW( ... ) (void)(0)
+
+#if !defined(CATCH_CONFIG_DISABLE_MATCHERS)
+#define CHECK_THAT( arg, matcher ) (void)(0)
+
+#define REQUIRE_THAT( arg, matcher ) (void)(0)
+#endif // CATCH_CONFIG_DISABLE_MATCHERS
+
+#define INFO( msg ) (void)(0)
+#define WARN( msg ) (void)(0)
+#define CAPTURE( msg ) (void)(0)
+
+#define TEST_CASE( ... )  INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+#define TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+#define METHOD_AS_TEST_CASE( method, ... )
+#define REGISTER_TEST_CASE( Function, ... ) (void)(0)
+#define SECTION( ... )
+#define DYNAMIC_SECTION( ... )
+#define FAIL( ... ) (void)(0)
+#define FAIL_CHECK( ... ) (void)(0)
+#define SUCCEED( ... ) (void)(0)
+#define ANON_TEST_CASE() INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ))
+
+#ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
+#define TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) )
+#define TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), className )
+#else
+#define TEMPLATE_TEST_CASE( ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ) ) )
+#define TEMPLATE_TEST_CASE_METHOD( className, ... ) INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_M_P_L_A_T_E____T_E_S_T____ ), className ) )
+#endif
+
+#define STATIC_REQUIRE( ... )       (void)(0)
+#define STATIC_REQUIRE_FALSE( ... ) (void)(0)
+
+#endif
+
+#define CATCH_TRANSLATE_EXCEPTION( signature ) INTERNAL_CATCH_TRANSLATE_EXCEPTION_NO_REG( INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionTranslator ), signature )
+
+// "BDD-style" convenience wrappers
+#define SCENARIO( ... ) INTERNAL_CATCH_TESTCASE_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ) )
+#define SCENARIO_METHOD( className, ... ) INTERNAL_CATCH_TESTCASE_METHOD_NO_REGISTRATION(INTERNAL_CATCH_UNIQUE_NAME( ____C_A_T_C_H____T_E_S_T____ ), className )
+
+#define GIVEN( desc )
+#define AND_GIVEN( desc )
+#define WHEN( desc )
+#define AND_WHEN( desc )
+#define THEN( desc )
+#define AND_THEN( desc )
+
+using Catch::Detail::Approx;
+
+#endif
+
+#endif // ! CATCH_CONFIG_IMPL_ONLY
+
+// start catch_reenable_warnings.h
+
+
+#ifdef __clang__
+#    ifdef __ICC // icpc defines the __clang__ macro
+#        pragma warning(pop)
+#    else
+#        pragma clang diagnostic pop
+#    endif
+#elif defined __GNUC__
+#    pragma GCC diagnostic pop
+#endif
+
+// end catch_reenable_warnings.h
+// end catch.hpp
+#endif // TWOBLUECUBES_SINGLE_INCLUDE_CATCH_HPP_INCLUDED
+
diff --git a/components/codecs/test/nvpipe_codec_unit.cpp b/components/codecs/test/nvpipe_codec_unit.cpp
new file mode 100644
index 000000000..86f773df6
--- /dev/null
+++ b/components/codecs/test/nvpipe_codec_unit.cpp
@@ -0,0 +1,121 @@
+#include "catch.hpp"
+#include <ftl/codecs/nvpipe_encoder.hpp>
+#include <ftl/codecs/nvpipe_decoder.hpp>
+#include <ftl/threads.hpp>
+
+using ftl::codecs::CodecPreset;
+using ftl::codecs::preset_t;
+using ftl::codecs::definition_t;
+using ftl::codecs::codec_t;
+
+ctpl::thread_pool ftl::pool(4);
+
+namespace ftl {
+	bool running = true;
+
+	namespace codecs {
+	namespace internal {
+	
+	void init_encoders() {}
+
+	}
+	}
+}
+
+TEST_CASE( "NvPipeEncoder::encode() - A colour test image at preset 0" ) {
+	ftl::codecs::NvPipeEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	cv::Mat m(cv::Size(1920,1080), CV_8UC3, cv::Scalar(0,0,0));
+
+	int block_total = 0;
+	std::atomic<int> block_count = 0;
+
+	const CodecPreset &preset = ftl::codecs::getPreset(ftl::codecs::kPreset0);
+
+	bool r = encoder.encode(m, ftl::codecs::kPreset0, [&block_total, &block_count, preset, m](const ftl::codecs::Packet &pkt) {
+		REQUIRE( pkt.codec == codec_t::HEVC );
+		REQUIRE( pkt.data.size() > 0 );
+		REQUIRE( pkt.definition == preset.colour_res );
+
+		block_total = pkt.block_total;
+		block_count++;
+	});
+
+	REQUIRE( r );
+	REQUIRE( block_count == block_total );
+}
+
+TEST_CASE( "NvPipeEncoder::encode() - A depth test image at preset 0" ) {
+	ftl::codecs::NvPipeEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	cv::Mat m(cv::Size(1920,1080), CV_32F, cv::Scalar(0.0f));
+
+	int block_total = 0;
+	std::atomic<int> block_count = 0;
+
+	const CodecPreset &preset = ftl::codecs::getPreset(ftl::codecs::kPreset0);
+
+	bool r = encoder.encode(m, ftl::codecs::kPreset0, [&block_total, &block_count, preset](const ftl::codecs::Packet &pkt) {
+		REQUIRE( pkt.codec == codec_t::HEVC );
+		REQUIRE( pkt.data.size() > 0 );
+		REQUIRE( pkt.definition == preset.depth_res );
+
+		block_total = pkt.block_total;
+		block_count++;
+	});
+
+	REQUIRE( r );
+	REQUIRE( block_count == block_total );
+}
+
+TEST_CASE( "NvPipeDecoder::decode() - A colour test image" ) {
+	ftl::codecs::NvPipeEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	ftl::codecs::NvPipeDecoder decoder;
+
+	cv::Mat in;
+	cv::Mat out;
+	bool r = false;
+
+	SECTION("FHD in and out, FHD encoding") {
+		in = cv::Mat(cv::Size(1920,1080), CV_8UC3, cv::Scalar(255,0,0));
+		out = cv::Mat(cv::Size(1920,1080), CV_8UC3, cv::Scalar(0,0,0));
+
+		r = encoder.encode(in, ftl::codecs::kPreset0, [&out,&decoder](const ftl::codecs::Packet &pkt) {
+			REQUIRE( decoder.decode(pkt, out) );
+		});
+	}
+
+	SECTION("Full HD in, 720 out, FHD encoding") {
+		in = cv::Mat(cv::Size(1920,1080), CV_8UC3, cv::Scalar(255,0,0));
+		out = cv::Mat(cv::Size(1280,720), CV_8UC3, cv::Scalar(0,0,0));
+
+		r = encoder.encode(in, ftl::codecs::kPreset0, [&out,&decoder](const ftl::codecs::Packet &pkt) {
+			REQUIRE( decoder.decode(pkt, out) );
+		});
+
+		REQUIRE( (out.rows == 720) );
+	}
+
+	SECTION("HHD in, FHD out, FHD encoding") {
+		in = cv::Mat(cv::Size(1280,720), CV_8UC3, cv::Scalar(255,0,0));
+		out = cv::Mat(cv::Size(1920,1080), CV_8UC3, cv::Scalar(0,0,0));
+
+		r = encoder.encode(in, ftl::codecs::kPreset0, [&out,&decoder](const ftl::codecs::Packet &pkt) {
+			REQUIRE( decoder.decode(pkt, out) );
+		});
+
+		REQUIRE( (out.rows == 1080) );
+	}
+
+	SECTION("FHD in, HHD out, SD encoding") {
+		in = cv::Mat(cv::Size(1920,1080), CV_8UC3, cv::Scalar(255,0,0));
+		out = cv::Mat(cv::Size(1280,720), CV_8UC3, cv::Scalar(0,0,0));
+
+		r = encoder.encode(in, ftl::codecs::kPreset4, [&out,&decoder](const ftl::codecs::Packet &pkt) {
+			REQUIRE( decoder.decode(pkt, out) );
+		});
+
+		REQUIRE( (out.rows == 720) );
+	}
+
+	REQUIRE( r );
+	REQUIRE( (cv::sum(out) != cv::Scalar(0,0,0)) );
+}
diff --git a/components/codecs/test/opencv_codec_unit.cpp b/components/codecs/test/opencv_codec_unit.cpp
new file mode 100644
index 000000000..dd85140db
--- /dev/null
+++ b/components/codecs/test/opencv_codec_unit.cpp
@@ -0,0 +1,96 @@
+#include "catch.hpp"
+#include <ftl/codecs/opencv_encoder.hpp>
+#include <ftl/codecs/opencv_decoder.hpp>
+#include <ftl/threads.hpp>
+
+using ftl::codecs::CodecPreset;
+using ftl::codecs::preset_t;
+using ftl::codecs::definition_t;
+using ftl::codecs::codec_t;
+
+ctpl::thread_pool ftl::pool(4);
+
+namespace ftl {
+	bool running = true;
+
+	namespace codecs {
+	namespace internal {
+	
+	void init_encoders() {}
+
+	}
+	}
+}
+
+TEST_CASE( "OpenCVEncoder::encode() - A colour test image at preset 0" ) {
+	ftl::codecs::OpenCVEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	cv::Mat m(cv::Size(1024,576), CV_8UC3, cv::Scalar(0,0,0));
+
+	int block_total = 0;
+	std::atomic<int> block_count = 0;
+
+	const CodecPreset &preset = ftl::codecs::getPreset(ftl::codecs::kPreset4);
+
+	std::mutex mtx;
+
+	bool r = encoder.encode(m, ftl::codecs::kPreset4, [&mtx, &block_total, &block_count, preset, m](const ftl::codecs::Packet &pkt) {
+		std::unique_lock<std::mutex> lk(mtx);
+		REQUIRE( pkt.codec == codec_t::JPG );
+		REQUIRE( pkt.data.size() > 0 );
+		REQUIRE( pkt.definition == preset.colour_res );
+
+		block_total = pkt.block_total;
+		block_count++;
+
+		cv::Mat d = cv::imdecode(pkt.data, cv::IMREAD_UNCHANGED);
+		REQUIRE( !d.empty() );
+		REQUIRE( d.cols * d.rows * pkt.block_total == m.cols * m.rows );
+	});
+
+	REQUIRE( r );
+	REQUIRE( block_count == block_total );
+}
+
+TEST_CASE( "OpenCVEncoder::encode() - A depth test image at preset 0" ) {
+	ftl::codecs::OpenCVEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	cv::Mat m(cv::Size(1024,576), CV_32F, cv::Scalar(0.0f));
+
+	int block_total = 0;
+	std::atomic<int> block_count = 0;
+
+	const CodecPreset &preset = ftl::codecs::getPreset(ftl::codecs::kPreset4);
+
+	std::mutex mtx;
+
+	bool r = encoder.encode(m, ftl::codecs::kPreset4, [&mtx, &block_total, &block_count, preset](const ftl::codecs::Packet &pkt) {
+		std::unique_lock<std::mutex> lk(mtx);
+		REQUIRE( pkt.codec == codec_t::PNG );
+		REQUIRE( pkt.data.size() > 0 );
+		REQUIRE( pkt.definition == preset.depth_res );
+
+		block_total = pkt.block_total;
+		block_count++;
+
+		cv::Mat d = cv::imdecode(pkt.data, cv::IMREAD_UNCHANGED);
+		REQUIRE( !d.empty() );
+	});
+
+	REQUIRE( r );
+	REQUIRE( block_count == block_total );
+}
+
+TEST_CASE( "OpenCVDecoder::decode() - A colour test image no resolution change" ) {
+	ftl::codecs::OpenCVEncoder encoder(definition_t::HD1080, definition_t::SD480);
+	ftl::codecs::OpenCVDecoder decoder;
+	cv::Mat in(cv::Size(1024,576), CV_8UC3, cv::Scalar(255,0,0));
+	cv::Mat out(cv::Size(1024,576), CV_8UC3, cv::Scalar(0,0,0));
+
+	std::mutex mtx;
+
+	bool r = encoder.encode(in, ftl::codecs::kPreset4, [&mtx, &out,&decoder](const ftl::codecs::Packet &pkt) {
+		std::unique_lock<std::mutex> lk(mtx);
+		REQUIRE( decoder.decode(pkt, out) );
+	});
+
+	REQUIRE( (cv::sum(out) != cv::Scalar(0,0,0)) );
+}
diff --git a/components/codecs/test/tests.cpp b/components/codecs/test/tests.cpp
new file mode 100644
index 000000000..178916eab
--- /dev/null
+++ b/components/codecs/test/tests.cpp
@@ -0,0 +1,3 @@
+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"
+
diff --git a/components/common/cpp/include/ftl/config.h.in b/components/common/cpp/include/ftl/config.h.in
index 025ad576f..121abb060 100644
--- a/components/common/cpp/include/ftl/config.h.in
+++ b/components/common/cpp/include/ftl/config.h.in
@@ -16,12 +16,14 @@
 #cmakedefine HAVE_URIPARSESINGLE
 #cmakedefine HAVE_CUDA
 #cmakedefine HAVE_OPENCV
+#cmakedefine HAVE_OPTFLOW
 #cmakedefine HAVE_PCL
 #cmakedefine HAVE_RENDER
 #cmakedefine HAVE_LIBSGM
 #cmakedefine HAVE_REALSENSE
 #cmakedefine HAVE_NANOGUI
 #cmakedefine HAVE_LIBARCHIVE
+#cmakedefine HAVE_NVPIPE
 
 extern const char *FTL_BRANCH;
 extern const char *FTL_VERSION_LONG;
diff --git a/components/common/cpp/include/ftl/threads.hpp b/components/common/cpp/include/ftl/threads.hpp
index b498ca9d0..83086135a 100644
--- a/components/common/cpp/include/ftl/threads.hpp
+++ b/components/common/cpp/include/ftl/threads.hpp
@@ -7,8 +7,8 @@
 
 #define POOL_SIZE 10
 
-#define DEBUG_MUTEX
-#define MUTEX_TIMEOUT 20
+//#define DEBUG_MUTEX
+#define MUTEX_TIMEOUT 5
 
 #if defined DEBUG_MUTEX
 #include <loguru.hpp>
diff --git a/components/common/cpp/src/timer.cpp b/components/common/cpp/src/timer.cpp
index e00a7a9d1..d6d8441c6 100644
--- a/components/common/cpp/src/timer.cpp
+++ b/components/common/cpp/src/timer.cpp
@@ -150,7 +150,7 @@ static void trigger_jobs() {
 	// Now use thread jobs to do more intensive callbacks
 	for (auto &j : jobs[kTimerMain]) {
 		if (j.active) {
-			DLOG(WARNING) << "Timer job too slow ... skipped for " << ts;
+			//LOG(WARNING) << "Timer job too slow ... skipped for " << ts;
 			continue;
 		}
 		j.active = true;
diff --git a/components/net/cpp/src/dispatcher.cpp b/components/net/cpp/src/dispatcher.cpp
index 34b01238a..3231b8ddc 100644
--- a/components/net/cpp/src/dispatcher.cpp
+++ b/components/net/cpp/src/dispatcher.cpp
@@ -65,15 +65,15 @@ void ftl::net::Dispatcher::dispatch_call(Peer &s, const msgpack::object &msg) {
     // assert(type == 0);
     
     if (type == 1) {
-    	DLOG(INFO) << "RPC return for " << id;
+    	//DLOG(INFO) << "RPC return for " << id;
     	s._dispatchResponse(id, args);
     } else if (type == 0) {
-		DLOG(INFO) << "RPC " << name << "() <- " << s.getURI();
+		//DLOG(INFO) << "RPC " << name << "() <- " << s.getURI();
 
 		auto func = _locateHandler(name);
 
 		if (func) {
-			DLOG(INFO) << "Found binding for " << name;
+			//DLOG(INFO) << "Found binding for " << name;
 		    try {
 		        auto result = (*func)(args); //->get();
 		        s._sendResponse(id, result->get());
@@ -149,7 +149,7 @@ void ftl::net::Dispatcher::dispatch_notification(Peer &s, msgpack::object const
 void ftl::net::Dispatcher::enforce_arg_count(std::string const &func, std::size_t found,
                                    std::size_t expected) {
     if (found != expected) {
-    	LOG(FATAL) << "RPC argument missmatch - " << found << " != " << expected;
+    	LOG(FATAL) << "RPC argument missmatch for '" << func << "' - " << found << " != " << expected;
         throw -1;
     }
 }
diff --git a/components/net/cpp/src/peer.cpp b/components/net/cpp/src/peer.cpp
index 6738470fe..25059b547 100644
--- a/components/net/cpp/src/peer.cpp
+++ b/components/net/cpp/src/peer.cpp
@@ -490,8 +490,12 @@ bool Peer::_data() {
 	UNIQUE_LOCK(recv_mtx_,lk);
 
 	if (scheme_ == ftl::URI::SCHEME_WS && !ws_read_header_) {
+		//LOG(INFO) << "Reading WS Header";
 		wsheader_type ws;
+		ws.header_size = 0;
 		if (ws_parse(recv_buf_, ws) < 0) {
+			//LOG(ERROR) << "Bad WS header " << ws.header_size;
+			is_waiting_ = true;
 			return false;
 		}
 		ws_read_header_ = true;
@@ -501,6 +505,7 @@ bool Peer::_data() {
 		is_waiting_ = true;
 		return false;
 	}
+	ws_read_header_ = false;
 	
 	lk.unlock();
 
@@ -509,11 +514,11 @@ bool Peer::_data() {
 		_data();
 	});
 
-	if (status_ != kConnected) {
+	if (status_ == kConnecting) {
 		// If not connected, must lock to make sure no other thread performs this step
 		UNIQUE_LOCK(recv_mtx_,lk);
 		// Verify still not connected after lock
-		if (status_ != kConnected) {
+		if (status_ == kConnecting) {
 			// First message must be a handshake
 			try {
 				tuple<uint32_t, std::string, msgpack::object> hs;
@@ -549,7 +554,7 @@ void Peer::_dispatchResponse(uint32_t id, msgpack::object &res) {
 	// TODO: Handle error reporting...
 	UNIQUE_LOCK(cb_mtx_,lk);
 	if (callbacks_.count(id) > 0) {
-		DLOG(1) << "Received return RPC value";
+		//DLOG(1) << "Received return RPC value";
 		
 		// Allow for unlock before callback
 		auto cb = std::move(callbacks_[id]);
diff --git a/components/net/cpp/src/universe.cpp b/components/net/cpp/src/universe.cpp
index 4d1d00499..29cf1254f 100644
--- a/components/net/cpp/src/universe.cpp
+++ b/components/net/cpp/src/universe.cpp
@@ -1,4 +1,5 @@
 #include <ftl/net/universe.hpp>
+#include <ftl/timer.hpp>
 #include <chrono>
 
 #ifdef WIN32
@@ -38,6 +39,8 @@ Universe::Universe() :
 		reconnect_attempts_(50),
 		thread_(Universe::__start, this) {
 	_installBindings();
+
+	LOG(WARNING) << "Deprecated Universe constructor";
 }
 
 Universe::Universe(nlohmann::json &config) :
@@ -53,7 +56,22 @@ Universe::Universe(nlohmann::json &config) :
 
 	_installBindings();
 
-	LOG(INFO) << "SEND BUFFER SIZE = " << send_size_;
+	// Add an idle timer job to garbage collect peer objects
+	// Note: Important to be a timer job to ensure no other timer jobs are
+	// using the object.
+	ftl::timer::add(ftl::timer::kTimerIdle10, [this](int64_t ts) {
+		if (garbage_.size() > 0) {
+			UNIQUE_LOCK(net_mutex_,lk);
+			if (ftl::pool.n_idle() == ftl::pool.size()) {
+				if (garbage_.size() > 0) LOG(INFO) << "Garbage collection";
+				while (garbage_.size() > 0) {
+					delete garbage_.front();
+					garbage_.pop_front();
+				}
+			}
+		}
+		return true;
+	});
 }
 
 Universe::~Universe() {
@@ -184,17 +202,6 @@ void Universe::_installBindings() {
 
 // Note: should be called inside a net lock
 void Universe::_cleanupPeers() {
-
-	if (ftl::pool.n_idle() == ftl::pool.size()) {
-		if (garbage_.size() > 0) LOG(INFO) << "Garbage collection";
-		while (garbage_.size() > 0) {
-			// FIXME: There is possibly still something with a peer pointer
-			// that is causing this throw an exception sometimes?
-			delete garbage_.front();
-			garbage_.pop_front();
-		}
-	}
-
 	auto i = peers_.begin();
 	while (i != peers_.end()) {
 		if (!(*i)->isValid()) {
diff --git a/components/rgbd-sources/CMakeLists.txt b/components/rgbd-sources/CMakeLists.txt
index 9aa252db3..ff7d29098 100644
--- a/components/rgbd-sources/CMakeLists.txt
+++ b/components/rgbd-sources/CMakeLists.txt
@@ -3,6 +3,7 @@ set(RGBDSRC
 	src/local.cpp
 	src/disparity.cpp
 	src/source.cpp
+	src/frame.cpp
 	src/stereovideo.cpp
 	src/middlebury_source.cpp
 	src/net.cpp
@@ -63,7 +64,7 @@ set_property(TARGET ftlrgbd PROPERTY CUDA_SEPARABLE_COMPILATION OFF)
 endif()
 
 #target_include_directories(cv-node PUBLIC ${PROJECT_SOURCE_DIR}/include)
-target_link_libraries(ftlrgbd ftlcommon ${OpenCV_LIBS} ${LIBSGM_LIBRARIES} ${CUDA_LIBRARIES} Eigen3::Eigen ${REALSENSE_LIBRARY} ftlnet ${LibArchive_LIBRARIES})
+target_link_libraries(ftlrgbd ftlcommon ${OpenCV_LIBS} ${LIBSGM_LIBRARIES} ${CUDA_LIBRARIES} Eigen3::Eigen ${REALSENSE_LIBRARY} ftlnet ${LibArchive_LIBRARIES} ftlcodecs)
 
 add_subdirectory(test)
 
diff --git a/components/rgbd-sources/include/ftl/rgbd/detail/netframe.hpp b/components/rgbd-sources/include/ftl/rgbd/detail/netframe.hpp
index 60620f093..f01154e12 100644
--- a/components/rgbd-sources/include/ftl/rgbd/detail/netframe.hpp
+++ b/components/rgbd-sources/include/ftl/rgbd/detail/netframe.hpp
@@ -18,6 +18,7 @@ struct NetFrame {
 	cv::Mat channel2;
 	volatile int64_t timestamp;
 	std::atomic<int> chunk_count;
+	int chunk_total;
 	std::atomic<int> tx_size;
 	int64_t tx_latency;
 	MUTEX mtx;
diff --git a/components/rgbd-sources/include/ftl/rgbd/detail/source.hpp b/components/rgbd-sources/include/ftl/rgbd/detail/source.hpp
index 25e19e396..29edf722f 100644
--- a/components/rgbd-sources/include/ftl/rgbd/detail/source.hpp
+++ b/components/rgbd-sources/include/ftl/rgbd/detail/source.hpp
@@ -4,32 +4,13 @@
 #include <Eigen/Eigen>
 #include <opencv2/opencv.hpp>
 #include <ftl/rgbd/camera.hpp>
+#include <ftl/rgbd/frame.hpp>
 
 namespace ftl{
 namespace rgbd {
 
 class Source;
 
-typedef unsigned int channel_t;
-
-static const channel_t kChanNone = 0;
-static const channel_t kChanLeft = 0x0001;
-static const channel_t kChanDepth = 0x0002;
-static const channel_t kChanRight = 0x0004;
-static const channel_t kChanDisparity = 0x0008;
-static const channel_t kChanDeviation = 0x0010;
-static const channel_t kChanNormals = 0x0020;
-static const channel_t kChanConfidence = 0x0040;
-static const channel_t kChanFlow = 0x0080;
-static const channel_t kChanEnergy = 0x0100;
-
-static const channel_t kChanOverlay1 = 0x1000;
-
-inline bool isFloatChannel(ftl::rgbd::channel_t chan) {
-	return (chan == ftl::rgbd::kChanDepth || chan == ftl::rgbd::kChanEnergy);
-}
-
-
 typedef unsigned int capability_t;
 
 static const capability_t kCapMovable	= 0x0001;	// A movable virtual cam
diff --git a/components/rgbd-sources/include/ftl/rgbd/frame.hpp b/components/rgbd-sources/include/ftl/rgbd/frame.hpp
new file mode 100644
index 000000000..227913e5d
--- /dev/null
+++ b/components/rgbd-sources/include/ftl/rgbd/frame.hpp
@@ -0,0 +1,137 @@
+#pragma once
+#ifndef _FTL_RGBD_FRAME_HPP_
+#define _FTL_RGBD_FRAME_HPP_
+
+#include <ftl/configuration.hpp>
+#include <opencv2/core.hpp>
+#include <opencv2/core/cuda.hpp>
+
+namespace ftl {
+namespace rgbd {
+
+typedef unsigned int channel_t;
+
+static const channel_t kChanNone = 0;
+static const channel_t kChanLeft = 0x0001;		// CV_8UC3
+static const channel_t kChanDepth = 0x0002;		// CV_32FC1
+static const channel_t kChanRight = 0x0004;		// CV_8UC3
+static const channel_t kChanDisparity = 0x0008; // CV_32FC1
+static const channel_t kChanDeviation = 0x0010;
+static const channel_t kChanNormals = 0x0020;
+static const channel_t kChanConfidence = 0x0040;
+static const channel_t kChanFlow = 0x0080;		// CV_16SC2 (format 10.5) from NVOF
+static const channel_t kChanEnergy = 0x0100;
+
+// should l/r gray be removed (not that expensive to re-calculate if needed)?
+static const channel_t kChanLeftGray = 0x0200;	// CV_8UC1
+static const channel_t kChanRightGray = 0x0400;	// CV_8UC1
+
+static const channel_t kChanOverlay1 = 0x1000;
+
+// maximum number of available channels
+static const unsigned int n_channels = 13;
+
+inline bool isFloatChannel(ftl::rgbd::channel_t chan) {
+	return (chan == ftl::rgbd::kChanDepth || chan == ftl::rgbd::kChanEnergy);
+}
+
+// TODO:	interpolation for scaling depends on channel type;
+//			NN for depth/disparity/optflow, linear/cubic/etc. for RGB
+
+class Frame;
+
+class Frame {
+public:
+	Frame() :	channels_host_(n_channels),
+				channels_gpu_(n_channels),
+				available_(n_channels, 0)
+	{}
+
+	/* @brief	Reset all channels without releasing memory.
+	 */
+	void reset()
+	{
+		std::fill(available_.begin(), available_.end(), 0);
+	}
+
+	/* @brief	Is there valid data in channel (either host or gpu).
+	 */
+	bool hasChannel(const ftl::rgbd::channel_t& channel)
+	{
+		return available_[_channelIdx(channel)];
+	}
+
+	/* @brief	Method to get reference to the channel content
+	 * @param	Channel type
+	 * @param	CUDA stream
+	 * @returns	Const reference to channel data
+	 * 
+	 * Result is valid only if hasChannel() is true. Host/Gpu transfer is
+	 * performed, if necessary, but only once unless channel contents is
+	 * changed by calling setChannel(). Return value valid only if
+	 * hasChannel(channel) is true.
+	 */
+	template <typename T> const T& getChannel(const ftl::rgbd::channel_t& channel, cv::cuda::Stream& stream);
+	template <typename T> const T& getChannel(const ftl::rgbd::channel_t& channel);
+
+	/* @brief	Method to set/modify channel content
+	 * @param	Channel type
+	 * @returns	Reference to channel data
+	 * 
+	 * Returns non-const reference to channel memory. Invalidates other copies
+	 * of the data (host/gpu) for the specified channel, next time getChannel()
+	 * is called a memory transfer may occur.
+	 * 
+	 * NOTE:	If user of setChannel<T>() wants to modify contents instead of
+	 * 			replacing them, getChannel<T>() needs to be called first to
+	 * 			ensure there is valid contents in the returned reference!
+	 * 			(TODO: interface could be improved)
+	 */
+	template <typename T> T& setChannel(const ftl::rgbd::channel_t& channel);
+
+private:
+
+	static size_t _channelIdx(const ftl::rgbd::channel_t& channel)
+	{
+		switch(channel)
+		{
+			case kChanNone:				return 0;
+			case kChanLeft:				return 1;
+			case kChanDepth:			return 2;
+			case kChanRight:			return 3;
+			case kChanDisparity:		return 4;
+			case kChanDeviation:		return 5;
+			case kChanNormals:			return 6;
+			case kChanConfidence:		return 7;
+			case kChanFlow:				return 8;
+			case kChanEnergy:			return 9;
+			case kChanLeftGray:			return 11;
+			case kChanRightGray:		return 12;
+			// should not happen (error); returned index is kChanNone
+			default:					return 0;
+		}
+	}
+
+	std::vector<cv::Mat> channels_host_;
+	std::vector<cv::cuda::GpuMat> channels_gpu_;
+
+	// bitmasks for each channel stored in available_
+	static const uint mask_host = 1;
+	static const uint mask_gpu = 2;
+
+	std::vector<uint> available_;
+};
+
+template<> const cv::Mat& Frame::getChannel(const ftl::rgbd::channel_t& channel, cv::cuda::Stream& stream);
+template<> const cv::cuda::GpuMat& Frame::getChannel(const ftl::rgbd::channel_t& channel, cv::cuda::Stream& stream);
+
+template<> const cv::Mat& Frame::getChannel(const ftl::rgbd::channel_t& channel);
+template<> const cv::cuda::GpuMat& Frame::getChannel(const ftl::rgbd::channel_t& channel);
+
+template<> cv::Mat& Frame::setChannel(const ftl::rgbd::channel_t& channel);
+template<> cv::cuda::GpuMat& Frame::setChannel(const ftl::rgbd::channel_t& channel);
+
+}
+}
+
+#endif // _FTL_RGBD_FRAME_HPP_
\ No newline at end of file
diff --git a/components/rgbd-sources/include/ftl/rgbd/group.hpp b/components/rgbd-sources/include/ftl/rgbd/group.hpp
index 35b3640cf..000eea0ae 100644
--- a/components/rgbd-sources/include/ftl/rgbd/group.hpp
+++ b/components/rgbd-sources/include/ftl/rgbd/group.hpp
@@ -22,10 +22,10 @@ struct FrameSet {
 	std::vector<Source*> sources;	// All source objects involved.
 	std::vector<cv::Mat> channel1;	// RGB
 	std::vector<cv::Mat> channel2;	// Depth (usually)
-	volatile int count;				// Number of valid frames
-	volatile unsigned int mask;		// Mask of all sources that contributed
+	std::atomic<int> count;				// Number of valid frames
+	std::atomic<unsigned int> mask;		// Mask of all sources that contributed
 	bool stale;						// True if buffers have been invalidated
-	MUTEX mtx;
+	SHARED_MUTEX mtx;
 };
 
 // Allows a latency of 20 frames maximum
@@ -46,6 +46,11 @@ class Group {
 	Group();
 	~Group();
 
+	/**
+	 * Give this group a name for logging purposes.
+	 */
+	void setName(const std::string &name);
+
 	/**
 	 * Add a new source to the group. Framesets generated prior to the source
 	 * being added will still be valid and will not contain a frame from this
@@ -104,6 +109,7 @@ class Group {
 	ftl::timer::TimerHandle cap_id_;
 	ftl::timer::TimerHandle swap_id_;
 	ftl::timer::TimerHandle main_id_;
+	std::string name_;
 
 	/* Insert a new frameset into the buffer, along with all intermediate
 	 * framesets between the last in buffer and the new one.
diff --git a/components/rgbd-sources/include/ftl/rgbd/source.hpp b/components/rgbd-sources/include/ftl/rgbd/source.hpp
index 4ddf48cdb..1106d7622 100644
--- a/components/rgbd-sources/include/ftl/rgbd/source.hpp
+++ b/components/rgbd-sources/include/ftl/rgbd/source.hpp
@@ -12,6 +12,7 @@
 #include <string>
 
 #include <ftl/cuda_common.hpp>
+#include <ftl/rgbd/frame.hpp>
 
 namespace ftl {
 
diff --git a/components/rgbd-sources/include/ftl/rgbd/streamer.hpp b/components/rgbd-sources/include/ftl/rgbd/streamer.hpp
index a571e63a0..3f6f1c4fa 100644
--- a/components/rgbd-sources/include/ftl/rgbd/streamer.hpp
+++ b/components/rgbd-sources/include/ftl/rgbd/streamer.hpp
@@ -7,6 +7,7 @@
 #include <ftl/rgbd/source.hpp>
 #include <ftl/rgbd/group.hpp>
 #include <ftl/net/universe.hpp>
+#include <ftl/codecs/encoder.hpp>
 #include <ftl/threads.hpp>
 #include <string>
 #include <vector>
@@ -26,7 +27,7 @@ struct StreamClient {
 	ftl::UUID peerid;
 	std::atomic<int> txcount;	// Frames sent since last request
 	int txmax;					// Frames to send in request
-	int bitrate;
+	ftl::codecs::preset_t preset;
 };
 
 static const unsigned int kGrabbed = 0x1;
@@ -40,6 +41,12 @@ struct StreamSource {
 	ftl::rgbd::Source *src;
 	std::atomic<int> jobs;				// Busy or ready to swap?
 	std::atomic<unsigned int> clientCount;
+
+	int hq_count;	// Number of high quality requests
+	int lq_count;	// Number of low quality requests
+	ftl::codecs::preset_t hq_bitrate=ftl::codecs::kPresetBest;	// Max bitrate
+	ftl::codecs::preset_t lq_bitrate=ftl::codecs::kPresetWorst;	// Min bitrate
+
 	cv::Mat rgb;									// Tx buffer
 	cv::Mat depth;									// Tx buffer
 	cv::Mat prev_rgb;
@@ -47,6 +54,11 @@ struct StreamSource {
 	std::list<detail::StreamClient> clients;
 	SHARED_MUTEX mutex;
 	unsigned long long frame;
+
+	ftl::codecs::Encoder *hq_encoder_c1 = nullptr;
+	ftl::codecs::Encoder *hq_encoder_c2 = nullptr;
+	ftl::codecs::Encoder *lq_encoder_c1 = nullptr;
+	ftl::codecs::Encoder *lq_encoder_c2 = nullptr;
 };
 
 }
@@ -56,6 +68,11 @@ struct StreamSource {
  */
 static const int kMaxFrames = 100;
 
+enum encoder_t {
+	kEncodeVideo,
+	kEncodeImages
+};
+
 /**
  * Allows network streaming of a number of RGB-Depth sources. Remote machines
  * can discover available streams from an instance of Streamer. It also allows
@@ -116,16 +133,13 @@ class Streamer : public ftl::Configurable {
 	bool active_;
 	ftl::net::Universe *net_;
 	bool late_;
-	std::mutex job_mtx_;
-	std::condition_variable job_cv_;
-	std::atomic<int> jobs_;
 	int compress_level_;
 	int64_t clock_adjust_;
 	ftl::UUID time_peer_;
 	int64_t last_frame_;
 	int64_t frame_no_;
-	size_t chunk_count_;
-	size_t chunk_dim_;
+
+	encoder_t encode_mode_;
 
 	int64_t mspf_;
 	float actual_fps_;
@@ -134,12 +148,18 @@ class Streamer : public ftl::Configurable {
 
 	ftl::timer::TimerHandle timer_job_;
 
-	void _transmit(ftl::rgbd::FrameSet &);
+	ftl::codecs::device_t hq_devices_;
+
+	void _process(ftl::rgbd::FrameSet &);
 	void _cleanUp();
 	void _addClient(const std::string &source, int N, int rate, const ftl::UUID &peer, const std::string &dest);
-	void _encodeAndTransmit(detail::StreamSource *src, const cv::Mat &, const cv::Mat &, int chunk);
-	void _encodeChannel1(const cv::Mat &in, std::vector<unsigned char> &out, unsigned int b);
-	bool _encodeChannel2(const cv::Mat &in, std::vector<unsigned char> &out, ftl::rgbd::channel_t c, unsigned int b);
+	void _transmitPacket(detail::StreamSource *src, const ftl::codecs::Packet &pkt, int chan, bool hasChan2, bool hqonly);
+
+	//void _encodeHQAndTransmit(detail::StreamSource *src, const cv::Mat &, const cv::Mat &, int chunk);
+	//void _encodeLQAndTransmit(detail::StreamSource *src, const cv::Mat &, const cv::Mat &, int chunk);
+	//void _encodeAndTransmit(detail::StreamSource *src, ftl::codecs::Encoder *enc1, ftl::codecs::Encoder *enc2, const cv::Mat &, const cv::Mat &);
+	//void _encodeImageChannel1(const cv::Mat &in, std::vector<unsigned char> &out, unsigned int b);
+	//bool _encodeImageChannel2(const cv::Mat &in, std::vector<unsigned char> &out, ftl::rgbd::channel_t c, unsigned int b);
 };
 
 }
diff --git a/components/rgbd-sources/src/abr.cpp b/components/rgbd-sources/src/abr.cpp
index 5400fa5d6..c338d4725 100644
--- a/components/rgbd-sources/src/abr.cpp
+++ b/components/rgbd-sources/src/abr.cpp
@@ -13,7 +13,7 @@ using ftl::rgbd::detail::NetFrame;
 
 ABRController::ABRController() {
     bitrate_ = 0;
-    enabled_ = false;
+    enabled_ = true;
     max_ = kBitrateBest;
     min_ = kBitrateWorst;
 }
@@ -33,7 +33,7 @@ void ABRController::setMinimumBitrate(bitrate_t b) {
 }
 
 void ABRController::notifyChanged() {
-    //enabled_ = true;
+    enabled_ = true;
 }
 
 bitrate_t ABRController::selectBitrate(const NetFrame &frame) {
@@ -41,10 +41,12 @@ bitrate_t ABRController::selectBitrate(const NetFrame &frame) {
 
     float actual_mbps = (float(frame.tx_size) * 8.0f * (1000.0f / float(frame.tx_latency))) / 1048576.0f;
     float min_mbps = (float(frame.tx_size) * 8.0f * (1000.0f / float(ftl::timer::getInterval()))) / 1048576.0f;
-    LOG(INFO) << "Bitrate = " << actual_mbps << "Mbps, min required = " << min_mbps << "Mbps";
+    //LOG(INFO) << "Bitrate = " << actual_mbps << "Mbps, min required = " << min_mbps << "Mbps";
     float ratio = actual_mbps / min_mbps;
     //LOG(INFO) << "Rate Ratio = " << frame.tx_latency;
 
+    return bitrate_;
+
     down_log_ = down_log_ << 1;
     up_log_ = up_log_ << 1;
 
@@ -81,7 +83,7 @@ const BitrateSetting &ABRController::getBitrateInfo(bitrate_t b) {
 };
 
 int ABRController::getColourWidth(bitrate_t b) {
-    return std::ceil(bitrate_settings[b].colour_res * kAspectRatio);
+    return int(std::ceil(bitrate_settings[b].colour_res * kAspectRatio)) & 0x7FFFFFFFC;
 }
 
 int ABRController::getDepthWidth(bitrate_t b) {
diff --git a/components/rgbd-sources/src/algorithms/fixstars_sgm.cpp b/components/rgbd-sources/src/algorithms/fixstars_sgm.cpp
index 347d66184..782338fc2 100644
--- a/components/rgbd-sources/src/algorithms/fixstars_sgm.cpp
+++ b/components/rgbd-sources/src/algorithms/fixstars_sgm.cpp
@@ -12,11 +12,9 @@ using cv::cuda::GpuMat;
 
 FixstarsSGM::FixstarsSGM(nlohmann::json &config) : Disparity(config) {
 	ssgm_ = nullptr;
+	const int width = size_.width;
+	const int height = size_.height;
 
-	int width = value("width", 1280);
-	int height = value("height", 720);
-	
-	size_ = cv::Size(width, height);
 	CHECK((width >= 480) && (height >= 360));
 
 	uniqueness_ = value("uniqueness", 0.95f);
@@ -38,7 +36,7 @@ FixstarsSGM::FixstarsSGM(nlohmann::json &config) : Disparity(config) {
 	}
 	
 #ifdef HAVE_OPTFLOW
-	bool use_off_ = value("use_off", false);
+	use_off_ = value("use_off", false);
 
 	if (use_off_)
 	{
@@ -64,54 +62,79 @@ void FixstarsSGM::init(const cv::Size size) {
 	);
 }
 
-void FixstarsSGM::compute(const cv::cuda::GpuMat &l, const cv::cuda::GpuMat &r,
-	cv::cuda::GpuMat &disp, cv::cuda::Stream &stream)
+void FixstarsSGM::compute(ftl::rgbd::Frame &frame, cv::cuda::Stream &stream)
 {
-	if (l.size() != size_) {
-		// re-use same buffer for l/r
-		cv::cuda::resize(r, l_downscaled_, size_, 0.0, 0.0, cv::INTER_CUBIC, stream);
-		cv::cuda::cvtColor(l_downscaled_, rbw_, cv::COLOR_BGR2GRAY, 0, stream);
-		cv::cuda::resize(l, l_downscaled_, size_, 0.0, 0.0, cv::INTER_CUBIC, stream);
-		cv::cuda::cvtColor(l_downscaled_, lbw_, cv::COLOR_BGR2GRAY, 0, stream);
+	/*if (!frame.hasChannel(ftl::rgbd::kChanLeftGray))
+	{
+		auto &rgb = frame.getChannel<GpuMat>(ftl::rgbd::kChanLeft, stream);
+		auto &gray = frame.setChannel<GpuMat>(ftl::rgbd::kChanLeftGray);
+		cv::cuda::cvtColor(rgb, gray, cv::COLOR_BGR2GRAY, 0, stream);
+	}
+
+	if (!frame.hasChannel(ftl::rgbd::kChanRightGray))
+	{
+		auto &rgb = frame.getChannel<GpuMat>(ftl::rgbd::kChanRight, stream);
+		auto &gray = frame.setChannel<GpuMat>(ftl::rgbd::kChanRightGray);
+		cv::cuda::cvtColor(rgb, gray, cv::COLOR_BGR2GRAY, 0, stream);
+	}*/
+
+	const auto &l = frame.getChannel<GpuMat>(ftl::rgbd::kChanLeft, stream);
+	const auto &r = frame.getChannel<GpuMat>(ftl::rgbd::kChanRight, stream);
+	auto &disp = frame.setChannel<GpuMat>(ftl::rgbd::kChanDisparity);
+
+	if (disp.size() != l.size())
+	{
+		disp = GpuMat(l.size(), CV_32FC1);
+	}
+
+	GpuMat l_scaled;
+	if (l.size() != size_)
+	{
+		GpuMat _r;
+		scaleInput(l, r, l_scaled, _r, stream);
+		cv::cuda::cvtColor(l_scaled, lbw_, cv::COLOR_BGR2GRAY, 0, stream);
+		cv::cuda::cvtColor(_r, rbw_, cv::COLOR_BGR2GRAY, 0, stream);
 	}
-	else {
+	else
+	{
 		cv::cuda::cvtColor(l, lbw_, cv::COLOR_BGR2GRAY, 0, stream);
 		cv::cuda::cvtColor(r, rbw_, cv::COLOR_BGR2GRAY, 0, stream);
 	}
 
 	stream.waitForCompletion();
-
 	ssgm_->execute(lbw_.data, rbw_.data, dispt_.data);
-
 	GpuMat left_pixels(dispt_, cv::Rect(0, 0, max_disp_, dispt_.rows));
 	left_pixels.setTo(0);
 	cv::cuda::threshold(dispt_, dispt_, 4096.0f, 0.0f, cv::THRESH_TOZERO_INV, stream);
 
 	// TODO: filter could be applied after upscaling (to the upscaled disparity image)
-	if (use_filter_) {
-		filter_->apply(dispt_,
-			l.size() != dispt_.size() ? l_downscaled_ : l,
+	if (use_filter_)
+	{
+		filter_->apply(
+			dispt_,
+			(l.size() == size_) ? l : l_scaled,
 			dispt_,
 			stream
 		);
 	}
 
-	if (l.size() != size_) {
-		cv::cuda::multiply(dispt_, (double)l.cols / (double)size_.width, dispt_);
-		// invalid areas (bad values) have to be taken into account in interpolation
-		cv::cuda::resize(dispt_, dispt_full_res_, l.size(), 0.0, 0.0, cv::INTER_NEAREST, stream);
+	GpuMat dispt_scaled;
+	if (l.size() != size_)
+	{
+		scaleDisparity(l.size(), dispt_, dispt_scaled, stream);
 	}
-	else {
-		dispt_full_res_ = dispt_;
+	else
+	{
+		dispt_scaled = dispt_;
 	}
 
-	dispt_full_res_.convertTo(disp, CV_32F, 1.0f / 16.0f, stream);
+	dispt_scaled.convertTo(disp, CV_32F, 1.0f / 16.0f, stream);
 
 #ifdef HAVE_OPTFLOW
-	if (use_off_) {
-		Mat disp_host(disp);
-		off_.filter(disp_host, Mat(lbw_));
-		disp.upload(disp_host);
+	if (use_off_)
+	{
+		frame.getChannel<Mat>(ftl::rgbd::kChanDisparity);
+		off_.filter(frame.setChannel<Mat>(ftl::rgbd::kChanDisparity), Mat(lbw_));
 	}
 #endif
 }
@@ -119,9 +142,7 @@ void FixstarsSGM::compute(const cv::cuda::GpuMat &l, const cv::cuda::GpuMat &r,
 void FixstarsSGM::setMask(Mat &mask) {
 	return; // TODO(Nick) Not needed, but also code below does not work with new GPU pipeline
 	CHECK(mask.type() == CV_8UC1) << "mask type must be CV_8U";
-
 	if (!ssgm_) { init(size_); }
-
-	mask_l_ = mask;
+	mask_l_ = GpuMat(mask);
 	ssgm_->setMask((uint8_t*)mask.data, mask.cols);
 }
\ No newline at end of file
diff --git a/components/rgbd-sources/src/algorithms/fixstars_sgm.hpp b/components/rgbd-sources/src/algorithms/fixstars_sgm.hpp
index 8102444f4..039db0c87 100644
--- a/components/rgbd-sources/src/algorithms/fixstars_sgm.hpp
+++ b/components/rgbd-sources/src/algorithms/fixstars_sgm.hpp
@@ -7,11 +7,13 @@
 
 #include <opencv2/core.hpp>
 #include <opencv2/opencv.hpp>
-#include <libsgm.h>
-#include "../disparity.hpp"
 #include <opencv2/cudastereo.hpp>
+
+#include "../disparity.hpp"
 #include <ftl/configuration.hpp>
+#include <ftl/config.h>
 
+#include <libsgm.h>
 #include "ftl/offilter.hpp"
 
 namespace ftl {
@@ -28,7 +30,7 @@ namespace ftl {
 		public:
 			explicit FixstarsSGM(nlohmann::json &config);
 
-			void compute(const cv::cuda::GpuMat &l, const cv::cuda::GpuMat &r, cv::cuda::GpuMat &disp, cv::cuda::Stream &stream) override;
+			void compute(ftl::rgbd::Frame &frame, cv::cuda::Stream &stream) override;
 			void setMask(cv::Mat &mask) override;
 
 			/* Factory creator */
@@ -42,7 +44,6 @@ namespace ftl {
 			float uniqueness_;
 			int P1_;
 			int P2_;
-			cv::Size size_;
 			bool use_filter_;
 			bool use_off_;
 			cv::Ptr<cv::cuda::DisparityBilateralFilter> filter_;
@@ -51,9 +52,6 @@ namespace ftl {
 			cv::cuda::GpuMat rbw_;
 			cv::cuda::GpuMat dispt_;
 
-			cv::cuda::GpuMat l_downscaled_;
-			cv::cuda::GpuMat dispt_full_res_;
-
 			#ifdef HAVE_OPTFLOW
 			ftl::rgbd::OFDisparityFilter off_;
 			#endif
diff --git a/components/rgbd-sources/src/disparity.cpp b/components/rgbd-sources/src/disparity.cpp
index e92c72de7..7d9089c1a 100644
--- a/components/rgbd-sources/src/disparity.cpp
+++ b/components/rgbd-sources/src/disparity.cpp
@@ -15,7 +15,11 @@ std::map<std::string, std::function<Disparity*(ftl::Configurable *, const std::s
 Disparity::Disparity(nlohmann::json &config)
 	: 	ftl::Configurable(config),
 		min_disp_(value("minimum",0)),
-		max_disp_(value("maximum", 256)) {}
+		max_disp_(value("maximum", 256)),
+		size_(value("width", 1280), value("height", 720))
+	{
+
+	}
 
 Disparity *Disparity::create(ftl::Configurable *parent, const std::string &name) {
 	nlohmann::json &config = ftl::config::resolve((!parent->getConfig()[name].is_null()) ? parent->getConfig()[name] : ftl::config::resolve(parent->getConfig())[name]); // ftl::config::resolve(parent->getConfig()[name]);
@@ -37,6 +41,28 @@ void Disparity::_register(const std::string &n,
 	(*algorithms__)[n] = f;
 }
 
+void Disparity::scaleInput(	const cv::cuda::GpuMat& left_in,
+							const cv::cuda::GpuMat& right_in,
+							cv::cuda::GpuMat& left_out,
+							cv::cuda::GpuMat& right_out,
+							cv::cuda::Stream &stream)
+{
+	cv::cuda::resize(left_in, left_scaled_, size_, 0.0, 0.0, cv::INTER_CUBIC, stream);
+	left_out = left_scaled_;
+	cv::cuda::resize(right_in, right_scaled_, size_, 0.0, 0.0, cv::INTER_CUBIC, stream);
+	right_out = right_scaled_;
+}
+
+void Disparity::scaleDisparity(	const cv::Size&		new_size,
+								cv::cuda::GpuMat&	in,
+								cv::cuda::GpuMat&	out,
+								cv::cuda::Stream&	stream)
+{
+	cv::cuda::multiply(in, (double) new_size.width / (double) in.cols, in);
+	cv::cuda::resize(in, dispt_scaled_, new_size, 0.0, 0.0, cv::INTER_NEAREST, stream);
+	out = dispt_scaled_;
+}
+
 // TODO:(Nick) Add remaining algorithms
 /*
 #include "algorithms/rtcensus.hpp"
diff --git a/components/rgbd-sources/src/disparity.hpp b/components/rgbd-sources/src/disparity.hpp
index e7e78b277..2ab8223ca 100644
--- a/components/rgbd-sources/src/disparity.hpp
+++ b/components/rgbd-sources/src/disparity.hpp
@@ -8,6 +8,7 @@
 #include <opencv2/opencv.hpp>
 #include <nlohmann/json.hpp>
 #include <ftl/configurable.hpp>
+#include <ftl/rgbd/frame.hpp>
 
 namespace ftl {
 namespace rgbd {
@@ -26,13 +27,32 @@ class Disparity : public ftl::Configurable {
 	virtual void setMinDisparity(size_t min) { min_disp_ = min; }
 	virtual void setMaxDisparity(size_t max) { max_disp_ = max; }
 	
-	virtual void setMask(cv::Mat &mask) { mask_l_ = mask; }
+	virtual void setMask(cv::Mat &mask) { mask_l_ = cv::cuda::GpuMat(mask); }
+	virtual void setMask(cv::cuda::GpuMat &mask) { mask_l_ = mask; }
 	
+	void scaleInput(const cv::cuda::GpuMat& left_in,
+					const cv::cuda::GpuMat& right_in,
+					cv::cuda::GpuMat& left_out,
+					cv::cuda::GpuMat& right_out,
+					cv::cuda::Stream &stream);
+	
+	void scaleDisparity(const cv::Size &new_size,
+						cv::cuda::GpuMat& in,
+						cv::cuda::GpuMat& out,
+						cv::cuda::Stream &stream);
+
 	/**
 	 * Pure virtual function representing the actual computation of
 	 * disparity from left and right images to be implemented.
 	 */
-	virtual void compute(const cv::cuda::GpuMat &l, const cv::cuda::GpuMat &r, cv::cuda::GpuMat &disp, cv::cuda::Stream &stream)=0;
+	virtual void compute(Frame &frame, cv::cuda::Stream &stream)=0;
+	virtual void compute(cv::cuda::GpuMat &l, cv::cuda::GpuMat &r, cv::cuda::GpuMat &disp, cv::cuda::Stream &stream)
+	{
+		ftl::rgbd::Frame frame;
+		frame.setChannel<cv::cuda::GpuMat>(kChanLeft) = l;
+		frame.setChannel<cv::cuda::GpuMat>(kChanRight) = r;
+		frame.setChannel<cv::cuda::GpuMat>(kChanDisparity) = disp;
+	}
 
 	/**
 	 * Factory registration class.
@@ -54,11 +74,15 @@ class Disparity : public ftl::Configurable {
 	protected:
 	static void _register(const std::string &n, std::function<Disparity*(ftl::Configurable *, const std::string &)> f);
 	
-	protected:
-	//nlohmann::json &config_;
+protected:
 	int min_disp_;
 	int max_disp_;
-	cv::Mat mask_l_;
+	cv::Size size_;
+	
+	cv::cuda::GpuMat left_scaled_;
+	cv::cuda::GpuMat right_scaled_;
+	cv::cuda::GpuMat dispt_scaled_;
+	cv::cuda::GpuMat mask_l_;
 	
 	private:
 	static std::map<std::string,std::function<Disparity*(ftl::Configurable *, const std::string &)>> *algorithms__;
@@ -69,4 +93,3 @@ class Disparity : public ftl::Configurable {
 }
 
 #endif // _FTL_DISPARITY_HPP_
-
diff --git a/components/rgbd-sources/src/frame.cpp b/components/rgbd-sources/src/frame.cpp
new file mode 100644
index 000000000..8145280cc
--- /dev/null
+++ b/components/rgbd-sources/src/frame.cpp
@@ -0,0 +1,68 @@
+
+#include <ftl/rgbd/frame.hpp>
+
+namespace ftl {
+namespace rgbd {
+
+template<> const cv::Mat& Frame::getChannel(const ftl::rgbd::channel_t& channel, cv::cuda::Stream &stream)
+{
+	size_t idx = _channelIdx(channel);
+	if (!(available_[idx] & mask_host))
+	{
+		if (available_[idx] & mask_gpu)
+		{
+			channels_gpu_[idx].download(channels_host_[idx], stream);
+			available_[idx] |= mask_host;
+		}
+	}
+
+	return channels_host_[idx];
+}
+
+template<> const cv::Mat& Frame::getChannel(const ftl::rgbd::channel_t& channel)
+{
+	auto &stream = cv::cuda::Stream::Null();
+	auto &retval = getChannel<cv::Mat>(channel, stream);
+	stream.waitForCompletion();
+	return retval;
+}
+
+template<> cv::Mat& Frame::setChannel(const ftl::rgbd::channel_t& channel)
+{
+	size_t idx = _channelIdx(channel);
+	available_[idx] = mask_host;
+	return channels_host_[idx];
+}
+
+template<> const cv::cuda::GpuMat& Frame::getChannel(const ftl::rgbd::channel_t& channel, cv::cuda::Stream &stream)
+{
+	size_t idx = _channelIdx(channel);
+	if (!(available_[idx] & mask_gpu))
+	{
+		if (available_[idx] & mask_host)
+		{
+			channels_gpu_[idx].upload(channels_host_[idx], stream);
+			available_[idx] |= mask_gpu;
+		}
+	}
+	
+	return channels_gpu_[idx];
+}
+
+template<> const cv::cuda::GpuMat& Frame::getChannel(const ftl::rgbd::channel_t& channel)
+{
+	auto &stream = cv::cuda::Stream::Null();
+	auto &retval = getChannel<cv::cuda::GpuMat>(channel, stream);
+	stream.waitForCompletion();
+	return retval;
+}
+
+template<> cv::cuda::GpuMat& Frame::setChannel(const ftl::rgbd::channel_t& channel)
+{
+	size_t idx = _channelIdx(channel);
+	available_[idx] = mask_gpu;
+	return channels_gpu_[idx];
+}
+
+}
+}
\ No newline at end of file
diff --git a/components/rgbd-sources/src/group.cpp b/components/rgbd-sources/src/group.cpp
index 66bce0b89..e61289220 100644
--- a/components/rgbd-sources/src/group.cpp
+++ b/components/rgbd-sources/src/group.cpp
@@ -18,6 +18,7 @@ Group::Group() : framesets_(kFrameBufferSize), head_(0) {
 	//setFPS(20);
 
 	mspf_ = ftl::timer::getInterval();
+	name_ = "NoName";
 
 	setLatency(5);
 }
@@ -68,7 +69,7 @@ void Group::addSource(ftl::rgbd::Source *src) {
 			FrameSet &fs = framesets_[(head_+kFrameBufferSize-i) % kFrameBufferSize];
 			if (fs.timestamp == timestamp) {
 				lk.unlock();
-				UNIQUE_LOCK(fs.mtx, lk2);
+				SHARED_LOCK(fs.mtx, lk2);
 
 				//LOG(INFO) << "Adding frame: " << ix << " for " << timestamp;
 				// Ensure channels match source mat format
@@ -83,17 +84,23 @@ void Group::addSource(ftl::rgbd::Source *src) {
 
 				if (fs.count == sources_.size()) {
 					//LOG(INFO) << "COMPLETE SET: " << fs.timestamp;
+				} else if (fs.count > sources_.size()) {
+					LOG(ERROR) << "Too many frames for frame set: " << fs.timestamp << " sources=" << sources_.size();
 				} else {
 					//LOG(INFO) << "INCOMPLETE SET ("  << ix << "): " << fs.timestamp;
 				}
 
 				if (callback_ && fs.count == sources_.size()) {
-					if (callback_(fs)) {
-						// TODO: Remove callback if returns false?
+					try {
+						if (callback_(fs)) {
+							// TODO: Remove callback if returns false?
+						}
+					} catch (...) {
+						LOG(ERROR) << "Exception in group callback";
 					}
 
 					// Reset count to prevent multiple reads of these frames
-					fs.count = 0;
+					//fs.count = 0;
 				}
 
 				return;
@@ -189,7 +196,13 @@ void Group::sync(std::function<bool(ftl::rgbd::FrameSet &)> cb) {
 			if (fs) {
 				UNIQUE_LOCK(fs->mtx, lk2);
 				lk.unlock();
-				cb(*fs);
+
+				try {
+					cb(*fs);
+					//LOG(INFO) << "Frameset processed (" << name_ << "): " << fs->timestamp;
+				} catch(...) {
+					LOG(ERROR) << "Exception in group sync callback";
+				}
 
 				// The buffers are invalid after callback so mark stale
 				fs->stale = true;
@@ -217,7 +230,8 @@ ftl::rgbd::FrameSet *Group::_getFrameset(int f) {
 		int idx = (head_+kFrameBufferSize-i)%kFrameBufferSize;
 
 		if (framesets_[idx].timestamp == lookfor && framesets_[idx].count != sources_.size()) {
-			LOG(INFO) << "Required frame not complete (mask " << (framesets_[idx].timestamp) << ")";
+			LOG(INFO) << "Required frame not complete (timestamp="  << (framesets_[idx].timestamp) << " buffer=" << i << ")";
+			//framesets_[idx].stale = true;
 			continue;
 		}
 
@@ -244,7 +258,12 @@ void Group::_addFrameset(int64_t timestamp) {
 	if (count < -int(kFrameBufferSize) || count >= kFrameBufferSize-1) {
 		head_ = (head_+1) % kFrameBufferSize;
 
-		if (!framesets_[head_].mtx.try_lock()) {
+		#ifdef DEBUG_MUTEX
+		std::unique_lock<std::shared_timed_mutex> lk(framesets_[head_].mtx, std::defer_lock);
+		#else
+		std::unique_lock<std::shared_mutex> lk(framesets_[head_].mtx, std::defer_lock);
+		#endif
+		if (!lk.try_lock()) {
 			LOG(ERROR) << "Frameset in use!!";
 			return;
 		}
@@ -259,7 +278,6 @@ void Group::_addFrameset(int64_t timestamp) {
 			framesets_[head_].sources.clear();
 			for (auto s : sources_) framesets_[head_].sources.push_back(s);
 		}
-		framesets_[head_].mtx.unlock();
 		return;
 	}
 
@@ -270,9 +288,14 @@ void Group::_addFrameset(int64_t timestamp) {
 		int64_t lt = (framesets_[head_].timestamp == -1) ? timestamp-mspf_ : framesets_[head_].timestamp;
 		head_ = (head_+1) % kFrameBufferSize;
 
-		if (!framesets_[head_].mtx.try_lock()) {
-			LOG(ERROR) << "Frameset in use!!";
-			break;
+		#ifdef DEBUG_MUTEX
+		std::unique_lock<std::shared_timed_mutex> lk(framesets_[head_].mtx, std::defer_lock);
+		#else
+		std::unique_lock<std::shared_mutex> lk(framesets_[head_].mtx, std::defer_lock);
+		#endif
+		if (!lk.try_lock()) {
+			LOG(ERROR) << "Frameset in use!! (" << name_ << ") " << framesets_[head_].timestamp << " stale=" << framesets_[head_].stale;
+			continue;
 		}
 		framesets_[head_].timestamp = lt+mspf_;
 		framesets_[head_].count = 0;
@@ -285,8 +308,11 @@ void Group::_addFrameset(int64_t timestamp) {
 			framesets_[head_].sources.clear();
 			for (auto s : sources_) framesets_[head_].sources.push_back(s);
 		}
-		framesets_[head_].mtx.unlock();
 	}
 }
 
+void Group::setName(const std::string &name) {
+	name_ = name;
+}
+
 
diff --git a/components/rgbd-sources/src/net.cpp b/components/rgbd-sources/src/net.cpp
index 2e873d5cf..5c3c7ecb5 100644
--- a/components/rgbd-sources/src/net.cpp
+++ b/components/rgbd-sources/src/net.cpp
@@ -44,6 +44,7 @@ NetFrame &NetFrameQueue::getFrame(int64_t ts, const cv::Size &s, int c1type, int
 		if (f.timestamp == -1) {
 			f.timestamp = ts;
 			f.chunk_count = 0;
+			f.chunk_total = 0;
 			f.tx_size = 0;
 			f.channel1.create(s, c1type);
 			f.channel2.create(s, c2type);
@@ -115,6 +116,10 @@ NetSource::NetSource(ftl::rgbd::Source *host)
 	gamma_ = host->value("gamma", 1.0f);
 	temperature_ = host->value("temperature", 6500);
 	default_quality_ = host->value("quality", 0);
+	last_bitrate_ = 0;
+
+	decoder_c1_ = nullptr;
+	decoder_c2_ = nullptr;
 
 	host->on("gamma", [this,host](const ftl::config::Event&) {
 		gamma_ = host->value("gamma", 1.0f);
@@ -149,9 +154,6 @@ NetSource::NetSource(ftl::rgbd::Source *host)
 		default_quality_ = host->value("quality", 0);
 	});
 
-	chunks_dim_ = host->value("chunking",4);
-	chunk_count_ = chunks_dim_*chunks_dim_;
-
 	abr_.setMaximumBitrate(host->value("max_bitrate", -1));
 	abr_.setMinimumBitrate(host->value("min_bitrate", -1));
 
@@ -165,6 +167,9 @@ NetSource::NetSource(ftl::rgbd::Source *host)
 }
 
 NetSource::~NetSource() {
+	if (decoder_c1_) ftl::codecs::free(decoder_c1_);
+	if (decoder_c2_) ftl::codecs::free(decoder_c2_);
+
 	if (uri_.size() > 0) {
 		host_->getNet()->unbind(uri_);
 	}
@@ -199,70 +204,72 @@ NetSource::~NetSource() {
 	}
 }*/
 
-void NetSource::_recvChunk(int64_t ts, short ttimeoff, int chunk, const vector<unsigned char> &jpg, const vector<unsigned char> &d) {
-	// TODO: Don't allocate these each chunk
-	cv::Mat tmp_rgb, tmp_depth;
+void NetSource::_createDecoder(int chan, const ftl::codecs::Packet &pkt) {
+	UNIQUE_LOCK(mutex_,lk);
+	auto *decoder = (chan == 0) ? decoder_c1_ : decoder_c2_;
+	if (decoder) {
+		if (!decoder->accepts(pkt)) {
+			ftl::codecs::free((chan == 0) ? decoder_c1_ : decoder_c2_);
+		} else {
+			return;
+		}
+	}
 
+	if (chan == 0) {
+		decoder_c1_ = ftl::codecs::allocateDecoder(pkt);
+	} else {
+		decoder_c2_ = ftl::codecs::allocateDecoder(pkt);
+	}
+}
+
+void NetSource::_recvPacket(short ttimeoff, const ftl::codecs::StreamPacket &spkt, const ftl::codecs::Packet &pkt) {
 	// Capture time here for better net latency estimate
 	int64_t now = std::chrono::time_point_cast<std::chrono::milliseconds>(std::chrono::high_resolution_clock::now()).time_since_epoch().count();
-
 	if (!active_) return;
 
 	const ftl::rgbd::channel_t chan = host_->getChannel();
-	NetFrame &frame = queue_.getFrame(ts, cv::Size(params_.width, params_.height), CV_8UC3, (isFloatChannel(chan) ? CV_32FC1 : CV_8UC3));
+	int rchan = spkt.channel & 0x1;
+
+	// Ignore any unwanted second channel
+	if (chan == ftl::rgbd::kChanNone && rchan > 0) {
+		LOG(INFO) << "Unwanted channel";
+		//return;
+		// TODO: Allow decode to be skipped
+	}
+
+	NetFrame &frame = queue_.getFrame(spkt.timestamp, cv::Size(params_.width, params_.height), CV_8UC3, (isFloatChannel(chan) ? CV_32FC1 : CV_8UC3));
 
 	// Update frame statistics
-	frame.tx_size += jpg.size() + d.size();
+	frame.tx_size += pkt.data.size();
 
-	// Build chunk head
-	int cx = (chunk % chunks_dim_) * chunk_width_;
-	int cy = (chunk / chunks_dim_) * chunk_height_;
-	cv::Rect roi(cx,cy,chunk_width_,chunk_height_);
-	cv::Mat chunkRGB = frame.channel1(roi);
-	cv::Mat chunkDepth = frame.channel2(roi);
+	_createDecoder(rchan, pkt);
+	auto *decoder = (rchan == 0) ? decoder_c1_ : decoder_c2_;
+	if (!decoder) {
+		LOG(ERROR) << "No frame decoder available";
+		return;
+	}
 
-	// Decode in temporary buffers to prevent long locks
-	cv::imdecode(jpg, cv::IMREAD_COLOR, &tmp_rgb);
-	if (d.size() > 0) cv::imdecode(d, cv::IMREAD_UNCHANGED, &tmp_depth);
+	decoder->decode(pkt, (rchan == 0) ? frame.channel1 : frame.channel2);
 
 	// Apply colour correction to chunk
-	ftl::rgbd::colourCorrection(tmp_rgb, gamma_, temperature_);
-
+	//ftl::rgbd::colourCorrection(tmp_rgb, gamma_, temperature_);
 
 	// TODO:(Nick) Decode directly into double buffer if no scaling
 
-	// Original size so just copy
-	if (tmp_rgb.cols == chunkRGB.cols) {
-		tmp_rgb.copyTo(chunkRGB);
-		if (!tmp_depth.empty() && tmp_depth.type() == CV_16U && chunkDepth.type() == CV_32F) {
-			tmp_depth.convertTo(chunkDepth, CV_32FC1, 1.0f/1000.0f); //(16.0f*10.0f));
-		} else if (!tmp_depth.empty() && tmp_depth.type() == CV_8UC3 && chunkDepth.type() == CV_8UC3) {
-			tmp_depth.copyTo(chunkDepth);
-		} else {
-			// Silent ignore?
-		}
-	// Downsized so needs a scale up
-	} else {
-		cv::resize(tmp_rgb, chunkRGB, chunkRGB.size());
-		//tmp_depth.convertTo(tmp_depth, CV_32FC1, 1.0f/1000.0f);
-		if (!tmp_depth.empty() && tmp_depth.type() == CV_16U && chunkDepth.type() == CV_32F) {
-			tmp_depth.convertTo(tmp_depth, CV_32FC1, 1.0f/1000.0f); //(16.0f*10.0f));
-			cv::resize(tmp_depth, chunkDepth, chunkDepth.size(), 0, 0, cv::INTER_NEAREST);
-		} else if (!tmp_depth.empty() && tmp_depth.type() == CV_8UC3 && chunkDepth.type() == CV_8UC3) {
-			cv::resize(tmp_depth, chunkDepth, chunkDepth.size());
-		} else {
-			// Silent ignore?
-		}
-	}
-
 	if (timestamp_ > 0 && frame.timestamp <= timestamp_) {
-		LOG(ERROR) << "BAD DUPLICATE FRAME - " << timestamp_ - frame.timestamp;
+		LOG(ERROR) << "BAD DUPLICATE FRAME - " << frame.timestamp << " received=" << int(rchan) << " uri=" << uri_;
 		return;
 	}
-		
+
+	// Calculate how many packets to expect for this frame
+	if (frame.chunk_total == 0) {
+		// Getting a second channel first means expect double packets
+		frame.chunk_total = pkt.block_total * ((spkt.channel >> 1) + 1);
+	}		
+
 	++frame.chunk_count;
 
-	if (frame.chunk_count > chunk_count_) LOG(FATAL) << "TOO MANY CHUNKS";
+	if (frame.chunk_count > frame.chunk_total) LOG(FATAL) << "TOO MANY CHUNKS";
 
 	// Capture tx time of first received chunk
 	if (frame.chunk_count == 1) {
@@ -273,18 +280,22 @@ void NetSource::_recvChunk(int64_t ts, short ttimeoff, int chunk, const vector<u
 	}
 
 	// Last chunk now received
-	if (frame.chunk_count == chunk_count_) {
+	if (frame.chunk_count == frame.chunk_total) {
 		UNIQUE_LOCK(frame.mtx, flk);
 
-		if (frame.timestamp >= 0 && frame.chunk_count == chunk_count_) {
+		if (frame.timestamp >= 0 && frame.chunk_count == frame.chunk_total) {
 			timestamp_ = frame.timestamp;
-			frame.tx_latency = now-(ts+frame.tx_latency);
+			frame.tx_latency = now-(spkt.timestamp+frame.tx_latency);
 
 			adaptive_ = abr_.selectBitrate(frame);
 			//LOG(INFO) << "Frame finished: " << frame.timestamp;
 			auto cb = host_->callback();
 			if (cb) {
-				cb(frame.timestamp, frame.channel1, frame.channel2);
+				try {
+					cb(frame.timestamp, frame.channel1, frame.channel2);
+				} catch (...) {
+					LOG(ERROR) << "Exception in net frame callback";
+				}
 			} else {
 				LOG(ERROR) << "NO FRAME CALLBACK";
 			}
@@ -293,7 +304,6 @@ void NetSource::_recvChunk(int64_t ts, short ttimeoff, int chunk, const vector<u
 
 			{
 				// Decrement expected frame counter
-				//UNIQUE_LOCK(host_->mutex(),lk);
 				N_--;
 			}
 		}
@@ -347,17 +357,21 @@ void NetSource::_updateURI() {
 
 		has_calibration_ = _getCalibration(*host_->getNet(), peer_, *uri, params_, ftl::rgbd::kChanLeft);
 
-		host_->getNet()->bind(*uri, [this](int64_t frame, short ttimeoff, int chunk, const vector<unsigned char> &jpg, const vector<unsigned char> &d) {
-			_recvChunk(frame, ttimeoff, chunk, jpg, d);
+		host_->getNet()->bind(*uri, [this](short ttimeoff, const ftl::codecs::StreamPacket &spkt, const ftl::codecs::Packet &pkt) {
+			//if (chunk == -1) {
+				//#ifdef HAVE_NVPIPE
+				//_recvVideo(frame, ttimeoff, bitrate, jpg, d);
+				//#else
+				//LOG(ERROR) << "Cannot receive HEVC, no NvPipe support";
+				//#endif
+			//} else {
+				//_recvChunk(frame, ttimeoff, bitrate, chunk, jpg, d);
+				_recvPacket(ttimeoff, spkt, pkt);
+			//}
 		});
 
 		N_ = 0;
 
-		// Update chunk details
-		//chunks_dim_ = ftl::rgbd::kChunkDim;
-		chunk_width_ = params_.width / chunks_dim_;
-		chunk_height_ = params_.height / chunks_dim_;
-		//chunk_count_ = 0;
 		rgb_ = cv::Mat(cv::Size(params_.width, params_.height), CV_8UC3, cv::Scalar(0,0,0));
 		depth_ = cv::Mat(cv::Size(params_.width, params_.height), CV_32FC1, 0.0f);
 		//d_rgb_ = cv::Mat(cv::Size(params_.width, params_.height), CV_8UC3, cv::Scalar(0,0,0));
diff --git a/components/rgbd-sources/src/net.hpp b/components/rgbd-sources/src/net.hpp
index b71b52150..236ac6969 100644
--- a/components/rgbd-sources/src/net.hpp
+++ b/components/rgbd-sources/src/net.hpp
@@ -2,13 +2,20 @@
 #ifndef _FTL_RGBD_NET_HPP_
 #define _FTL_RGBD_NET_HPP_
 
+#include <ftl/config.h>
+
 #include <ftl/net/universe.hpp>
 #include <ftl/rgbd/source.hpp>
 #include <ftl/rgbd/detail/abr.hpp>
 #include <ftl/threads.hpp>
 #include <ftl/rgbd/detail/netframe.hpp>
+#include <ftl/codecs/decoder.hpp>
 #include <string>
 
+#ifdef HAVE_NVPIPE
+#include <NvPipe.h>
+#endif
+
 namespace ftl {
 namespace rgbd {
 namespace detail {
@@ -44,19 +51,24 @@ class NetSource : public detail::Source {
 	std::string uri_;
 	ftl::net::callback_t h_;
 	SHARED_MUTEX mutex_;
-	int chunks_dim_;
-	int chunk_width_;
-	int chunk_height_;
 	cv::Mat idepth_;
 	float gamma_;
 	int temperature_;
 	int minB_;
 	int maxN_;
 	int default_quality_;
-	int chunk_count_;
 	ftl::rgbd::channel_t prev_chan_;
 
 	ftl::rgbd::detail::ABRController abr_;
+	int last_bitrate_;
+
+	//#ifdef HAVE_NVPIPE
+	//NvPipe *nv_channel1_decoder_;
+	//NvPipe *nv_channel2_decoder_;
+	//#endif
+
+	ftl::codecs::Decoder *decoder_c1_;
+	ftl::codecs::Decoder *decoder_c2_;
 
 	// Adaptive bitrate functionality
 	ftl::rgbd::detail::bitrate_t adaptive_;	 // Current adapted bitrate
@@ -67,9 +79,12 @@ class NetSource : public detail::Source {
 
 	bool _getCalibration(ftl::net::Universe &net, const ftl::UUID &peer, const std::string &src, ftl::rgbd::Camera &p, ftl::rgbd::channel_t chan);
 	void _recv(const std::vector<unsigned char> &jpg, const std::vector<unsigned char> &d);
-	void _recvChunk(int64_t frame, short ttimeoff, int chunk, const std::vector<unsigned char> &jpg, const std::vector<unsigned char> &d);
+	void _recvPacket(short ttimeoff, const ftl::codecs::StreamPacket &, const ftl::codecs::Packet &);
+	//void _recvChunk(int64_t frame, short ttimeoff, uint8_t bitrate, int chunk, const std::vector<unsigned char> &jpg, const std::vector<unsigned char> &d);
+	//void _recvVideo(int64_t ts, short ttimeoff, uint8_t bitrate, const std::vector<unsigned char> &chan1, const std::vector<unsigned char> &chan2);
 	void _updateURI();
 	//void _checkAdaptive(int64_t);
+	void _createDecoder(int chan, const ftl::codecs::Packet &);
 };
 
 }
diff --git a/components/rgbd-sources/src/offilter.cpp b/components/rgbd-sources/src/offilter.cpp
index 2ed77845d..03db4807a 100644
--- a/components/rgbd-sources/src/offilter.cpp
+++ b/components/rgbd-sources/src/offilter.cpp
@@ -1,9 +1,9 @@
+#include "ftl/offilter.hpp"
+
 #ifdef HAVE_OPTFLOW
 
 #include <loguru.hpp>
 
-#include "ftl/offilter.hpp"
-
 using namespace ftl::rgbd;
 
 using cv::Mat;
@@ -16,7 +16,8 @@ template<typename T> static bool inline isValidDisparity(T d) { return (0.0 < d)
 OFDisparityFilter::OFDisparityFilter(Size size, int n_frames, float threshold) :
 	n_(0), n_max_(n_frames), threshold_(threshold), size_(size)
 {
-	disp_ = Mat::zeros(size, CV_64FC(n_frames));
+	
+	disp_ = Mat::zeros(cv::Size(size.width * n_frames, size.height), CV_64FC1);
 	gray_ = Mat::zeros(size, CV_8UC1);
 
 	nvof_ = cv::cuda::NvidiaOpticalFlow_1_0::create(size.width, size.height,
diff --git a/components/rgbd-sources/src/stereovideo.cpp b/components/rgbd-sources/src/stereovideo.cpp
index 57e57fbbd..ebc72d854 100644
--- a/components/rgbd-sources/src/stereovideo.cpp
+++ b/components/rgbd-sources/src/stereovideo.cpp
@@ -31,7 +31,8 @@ StereoVideoSource::~StereoVideoSource() {
 	delete lsrc_;
 }
 
-void StereoVideoSource::init(const string &file) {
+void StereoVideoSource::init(const string &file)
+{
 	capabilities_ = kCapVideo | kCapStereo;
 
 	if (ftl::is_video(file)) {
@@ -57,6 +58,18 @@ void StereoVideoSource::init(const string &file) {
 	}
 
 	cv::Size size = cv::Size(lsrc_->width(), lsrc_->height());
+	frames_ = std::vector<Frame>(2);
+
+#ifdef HAVE_OPTFLOW
+	use_optflow_ =  host_->value("use_optflow", false);
+	LOG(INFO) << "Using optical flow: " << (use_optflow_ ? "true" : "false");
+
+	nvof_ = cv::cuda::NvidiaOpticalFlow_1_0::create(size.width, size.height,
+													cv::cuda::NvidiaOpticalFlow_1_0::NV_OF_PERF_LEVEL_SLOW,
+													true, false, false, 0);
+
+#endif
+
 	calib_ = ftl::create<Calibrate>(host_, "calibration", size, stream_);
 
 	if (!calib_->isCalibrated()) LOG(WARNING) << "Cameras are not calibrated!";
@@ -160,49 +173,71 @@ bool StereoVideoSource::capture(int64_t ts) {
 }
 
 bool StereoVideoSource::retrieve() {
-	lsrc_->get(cap_left_, cap_right_, calib_, stream2_);
+	auto &frame = frames_[0];
+	frame.reset();
+	auto &left = frame.setChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanLeft);
+	auto &right = frame.setChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanRight);
+	lsrc_->get(left, right, calib_, stream2_);
+
+#ifdef HAVE_OPTFLOW
+	// see comments in https://gitlab.utu.fi/nicolas.pope/ftl/issues/155
+	
+	if (use_optflow_)
+	{
+		auto &left_gray = frame.setChannel<cv::cuda::GpuMat>(kChanLeftGray);
+		auto &right_gray = frame.setChannel<cv::cuda::GpuMat>(kChanRightGray);
+
+		cv::cuda::cvtColor(left, left_gray, cv::COLOR_BGR2GRAY, 0, stream2_);
+		cv::cuda::cvtColor(right, right_gray, cv::COLOR_BGR2GRAY, 0, stream2_);
+
+		if (frames_[1].hasChannel(kChanLeftGray))
+		{
+			auto &left_gray_prev = frame.getChannel<cv::cuda::GpuMat>(kChanLeftGray, stream2_);
+			auto &optflow = frame.setChannel<cv::cuda::GpuMat>(kChanFlow);
+			nvof_->calc(left_gray, left_gray_prev, optflow_, stream2_);
+			// nvof_->upSampler() isn't implemented with CUDA
+			// cv::cuda::resize() does not work wiht 2-channel input
+			// cv::cuda::resize(optflow_, optflow, left.size(), 0.0, 0.0, cv::INTER_NEAREST, stream2_);
+		}
+	}
+#endif
+
 	stream2_.waitForCompletion();
 	return true;
 }
 
 void StereoVideoSource::swap() {
-	cv::cuda::GpuMat tmp;
-	tmp = left_;
-	left_ = cap_left_;
-	cap_left_ = tmp;
-	tmp = right_;
-	right_ = cap_right_;
-	cap_right_ = tmp;
+	auto tmp = frames_[0];
+	frames_[0] = frames_[1];
+	frames_[1] = tmp;
 }
 
-bool StereoVideoSource::compute(int n, int b) {	
-	const ftl::rgbd::channel_t chan = host_->getChannel();
+bool StereoVideoSource::compute(int n, int b) {
+	auto &frame = frames_[1];
+	auto &left = frame.getChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanLeft);
+	auto &right = frame.getChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanRight);
 
-	if (left_.empty() || right_.empty()) return false;
+	const ftl::rgbd::channel_t chan = host_->getChannel();
+	if (left.empty() || right.empty()) return false;
 
 	if (chan == ftl::rgbd::kChanDepth) {
-		//lsrc_->get(left_, right_, stream_);
-		if (depth_tmp_.empty()) depth_tmp_ = cv::cuda::GpuMat(left_.size(), CV_32FC1);
-		if (disp_tmp_.empty()) disp_tmp_ = cv::cuda::GpuMat(left_.size(), CV_32FC1);
-		//calib_->rectifyStereo(left_, right_, stream_);
-		disp_->compute(left_, right_, disp_tmp_, stream_);
-		ftl::cuda::disparity_to_depth(disp_tmp_, depth_tmp_, params_, stream_);
-		left_.download(rgb_, stream_);
-		//rgb_ = lsrc_->cachedLeft();
-		depth_tmp_.download(depth_, stream_);
-
+		disp_->compute(frame, stream_);
+		
+		auto &disp = frame.getChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanDisparity);
+		auto &depth = frame.setChannel<cv::cuda::GpuMat>(ftl::rgbd::kChanDepth);
+		if (depth.empty()) depth = cv::cuda::GpuMat(left.size(), CV_32FC1);
+
+		ftl::cuda::disparity_to_depth(disp, depth, params_, stream_);
+		
+		left.download(rgb_, stream_);
+		depth.download(depth_, stream_);
 		stream_.waitForCompletion();  // TODO:(Nick) Move to getFrames
 	} else if (chan == ftl::rgbd::kChanRight) {
-		//lsrc_->get(left_, right_, stream_);
-		//calib_->rectifyStereo(left_, right_, stream_);
-		left_.download(rgb_, stream_);
-		right_.download(depth_, stream_);
+		left.download(rgb_, stream_);
+		right.download(depth_, stream_);
 		stream_.waitForCompletion();  // TODO:(Nick) Move to getFrames
 	} else {
-		//lsrc_->get(left_, right_, stream_);
-		//calib_->rectifyStereo(left_, right_, stream_);
-		//rgb_ = lsrc_->cachedLeft();
-		left_.download(rgb_, stream_);
+		left.download(rgb_, stream_);
 		stream_.waitForCompletion();  // TODO:(Nick) Move to getFrames
 	}
 
diff --git a/components/rgbd-sources/src/stereovideo.hpp b/components/rgbd-sources/src/stereovideo.hpp
index 88b71a068..9fe3ca529 100644
--- a/components/rgbd-sources/src/stereovideo.hpp
+++ b/components/rgbd-sources/src/stereovideo.hpp
@@ -41,19 +41,21 @@ class StereoVideoSource : public detail::Source {
 	Disparity *disp_;
 	
 	bool ready_;
+	bool use_optflow_;
 	
 	cv::cuda::Stream stream_;
 	cv::cuda::Stream stream2_;
 
-	cv::cuda::GpuMat left_;
-	cv::cuda::GpuMat right_;
-	cv::cuda::GpuMat cap_left_;
-	cv::cuda::GpuMat cap_right_;
-	cv::cuda::GpuMat disp_tmp_;
-	cv::cuda::GpuMat depth_tmp_;
-	
+	std::vector<Frame> frames_;
+
 	cv::Mat mask_l_;
 
+#ifdef HAVE_OPTFLOW
+	// see comments in https://gitlab.utu.fi/nicolas.pope/ftl/issues/155
+	cv::Ptr<cv::cuda::NvidiaOpticalFlow_1_0> nvof_;
+	cv::cuda::GpuMat optflow_;
+#endif
+
 	void init(const std::string &);
 };
 
diff --git a/components/rgbd-sources/src/streamer.cpp b/components/rgbd-sources/src/streamer.cpp
index 81731781c..4a9ccf529 100644
--- a/components/rgbd-sources/src/streamer.cpp
+++ b/components/rgbd-sources/src/streamer.cpp
@@ -8,13 +8,15 @@
 #include <algorithm>
 
 #include <ftl/rgbd/detail/abr.hpp>
+#include <ftl/codecs/encoder.hpp>
 
 using ftl::rgbd::Streamer;
 using ftl::rgbd::Source;
 using ftl::rgbd::detail::StreamSource;
 using ftl::rgbd::detail::StreamClient;
-using ftl::rgbd::detail::bitrate_settings;
 using ftl::rgbd::detail::ABRController;
+using ftl::codecs::definition_t;
+using ftl::codecs::device_t;
 using ftl::net::Universe;
 using std::string;
 using std::list;
@@ -26,9 +28,11 @@ using std::chrono::milliseconds;
 using std::tuple;
 using std::make_tuple;
 
+static const ftl::codecs::preset_t kQualityThreshold = ftl::codecs::kPresetLQThreshold;
+
 
 Streamer::Streamer(nlohmann::json &config, Universe *net)
-		: ftl::Configurable(config), late_(false), jobs_(0) {
+		: ftl::Configurable(config), late_(false) {
 
 	active_ = false;
 	net_ = net;
@@ -38,10 +42,8 @@ Streamer::Streamer(nlohmann::json &config, Universe *net)
 	//last_dropped_ = 0;
 	//drop_count_ = 0;
 
-	chunk_dim_ = value("chunking",4);
-	chunk_count_ = chunk_dim_*chunk_dim_;
-
-	LOG(INFO) << "CHUNK COUNT = " << chunk_count_;
+	encode_mode_ = ftl::rgbd::kEncodeVideo;
+	hq_devices_ = (value("disable_hardware_encode", false)) ? device_t::Software : device_t::Any;
 
 	//group_.setFPS(value("fps", 20));
 	group_.setLatency(10);
@@ -134,6 +136,19 @@ Streamer::~Streamer() {
 	net_->unbind("sync_streams");
 	net_->unbind("ping_streamer");
 	//pool_.stop();
+
+	{
+		UNIQUE_LOCK(mutex_,ulk);
+		for (auto &s : sources_) {
+			StreamSource *src = s.second;
+			src->clientCount = 0;
+		}
+	}
+	_cleanUp();
+	{
+		UNIQUE_LOCK(mutex_,ulk);
+		sources_.clear();
+	}
 }
 
 void Streamer::add(Source *src) {
@@ -147,6 +162,8 @@ void Streamer::add(Source *src) {
 		s->jobs = 0;
 		s->frame = 0;
 		s->clientCount = 0;
+		s->hq_count = 0;
+		s->lq_count = 0;
 		sources_[src->getID()] = s;
 
 		group_.addSource(src);
@@ -166,7 +183,7 @@ void Streamer::_addClient(const string &source, int N, int rate, const ftl::UUID
 		if (rate < 0 || rate >= 10) return;
 		if (N < 0 || N > ftl::rgbd::kMaxFrames) return;
 
-		DLOG(INFO) << "Adding Stream Peer: " << peer.to_string() << " rate=" << rate << " N=" << N;
+		//DLOG(INFO) << "Adding Stream Peer: " << peer.to_string() << " rate=" << rate << " N=" << N;
 
 		s = sources_[source];
 
@@ -211,9 +228,23 @@ void Streamer::_addClient(const string &source, int N, int rate, const ftl::UUID
 	for (auto &client : s->clients) {
 		// If already listening, just update chunk counters
 		if (client.peerid == peer) {
-			client.txmax = N * chunk_count_;
+			client.txmax = N;
 			client.txcount = 0;
-			client.bitrate = rate;
+
+			// Possible switch from high quality to low quality encoding or vice versa
+			if (client.preset < kQualityThreshold && rate >= kQualityThreshold) {
+				s->hq_count--;
+				s->lq_count++;
+				if (s->lq_encoder_c1) s->lq_encoder_c1->reset();
+				if (s->lq_encoder_c2) s->lq_encoder_c2->reset();
+			} else if (client.preset >= kQualityThreshold && rate < kQualityThreshold) {
+				s->hq_count++;
+				s->lq_count--;
+				if (s->hq_encoder_c1) s->hq_encoder_c1->reset();
+				if (s->hq_encoder_c2) s->hq_encoder_c2->reset();
+			}
+
+			client.preset = rate;
 			return;
 		}
 	}
@@ -223,8 +254,19 @@ void Streamer::_addClient(const string &source, int N, int rate, const ftl::UUID
 	c.peerid = peer;
 	c.uri = dest;
 	c.txcount = 0;
-	c.txmax = N * chunk_count_;
-	c.bitrate = rate;
+	c.txmax = N;
+	c.preset = rate;
+
+	if (rate >= kQualityThreshold) {
+		if (s->lq_encoder_c1) s->lq_encoder_c1->reset();
+		if (s->lq_encoder_c2) s->lq_encoder_c2->reset();
+		s->lq_count++;
+	} else {
+		if (s->hq_encoder_c1) s->hq_encoder_c1->reset();
+		if (s->hq_encoder_c2) s->hq_encoder_c2->reset();
+		s->hq_count++;
+	}
+
 	++s->clientCount;
 }
 
@@ -243,14 +285,14 @@ void Streamer::stop() {
 void Streamer::run(bool block) {
 	if (block) {
 		group_.sync([this](FrameSet &fs) -> bool {
-			_transmit(fs);
+			_process(fs);
 			return true;
 		});
 	} else {
 		// Create thread job for frame ticking
 		ftl::pool.push([this](int id) {
 			group_.sync([this](FrameSet &fs) -> bool {
-				_transmit(fs);
+				_process(fs);
 				return true;
 			});
 		});
@@ -272,16 +314,37 @@ void Streamer::_cleanUp() {
 					time_peer_ = ftl::UUID(0);
 				}
 				LOG(INFO) << "Remove client: " << (*i).uri;
+
+				if ((*i).preset < kQualityThreshold) {
+					src->hq_count--;
+				} else {
+					src->lq_count--;
+				}
+
 				i = src->clients.erase(i);
 				--src->clientCount;
 			} else {
 				i++;
 			}
 		}
+
+		if (src->hq_count == 0) {
+			if (src->hq_encoder_c1) ftl::codecs::free(src->hq_encoder_c1);
+			if (src->hq_encoder_c2) ftl::codecs::free(src->hq_encoder_c2);
+		}
+
+		if (src->lq_count == 0) {
+			if (src->lq_encoder_c1) ftl::codecs::free(src->lq_encoder_c1);
+			if (src->lq_encoder_c2) ftl::codecs::free(src->lq_encoder_c2);
+		}
+
+		if (src->clientCount == 0) {
+
+		}
 	}
 }
 
-void Streamer::_transmit(ftl::rgbd::FrameSet &fs) {
+void Streamer::_process(ftl::rgbd::FrameSet &fs) {
 	// Prevent new clients during processing.
 	SHARED_LOCK(mutex_,slk);
 
@@ -296,6 +359,7 @@ void Streamer::_transmit(ftl::rgbd::FrameSet &fs) {
 
 	for (int j=0; j<fs.sources.size(); ++j) {
 		StreamSource *src = sources_[fs.sources[j]->getID()];
+		SHARED_LOCK(src->mutex,lk);
 
 		// Don't do any work in the following cases
 		if (!src) continue;
@@ -303,45 +367,278 @@ void Streamer::_transmit(ftl::rgbd::FrameSet &fs) {
 		if (src->clientCount == 0) continue;
 		if (fs.channel1[j].empty() || (fs.sources[j]->getChannel() != ftl::rgbd::kChanNone && fs.channel2[j].empty())) continue;
 
+		bool hasChan2 = fs.sources[j]->getChannel() != ftl::rgbd::kChanNone;
+
 		totalclients += src->clientCount;
 
-		// Create jobs for each chunk
-		for (int i=0; i<chunk_count_; ++i) {
-			// Add chunk job to thread pool
-			ftl::pool.push([this,&fs,j,i,src](int id) {
-				int chunk = i;
-				try {
-					_encodeAndTransmit(src, fs.channel1[j], fs.channel2[j], chunk);
-				} catch(...) {
-					LOG(ERROR) << "Encode Exception: " << chunk;
+		// Do we need to do high quality encoding?
+		if (src->hq_count > 0) {
+			if (!src->hq_encoder_c1) src->hq_encoder_c1 = ftl::codecs::allocateEncoder(
+					definition_t::HD1080, hq_devices_);
+			if (!src->hq_encoder_c2 && hasChan2) src->hq_encoder_c2 = ftl::codecs::allocateEncoder(
+					definition_t::HD1080, hq_devices_);
+
+			// Do we have the resources to do a HQ encoding?
+			if (src->hq_encoder_c1 && (!hasChan2 || src->hq_encoder_c2)) {
+				auto *enc1 = src->hq_encoder_c1;
+				auto *enc2 = src->hq_encoder_c2;
+
+				// Important to send channel 2 first if needed...
+				// Receiver only waits for channel 1 by default
+				// TODO: Each encode could be done in own thread
+				if (hasChan2) {
+					enc2->encode(fs.channel2[j], src->hq_bitrate, [this,src,hasChan2](const ftl::codecs::Packet &blk){
+						_transmitPacket(src, blk, 1, hasChan2, true);
+					});
+				} else {
+					if (enc2) enc2->reset();
 				}
 
-				//src->jobs--;
-				std::unique_lock<std::mutex> lk(job_mtx_);
-				--jobs_;
-				if (jobs_ == 0) job_cv_.notify_one();
-			});
+				enc1->encode(fs.channel1[j], src->hq_bitrate, [this,src,hasChan2](const ftl::codecs::Packet &blk){
+					_transmitPacket(src, blk, 0, hasChan2, true);
+				});
+			}
+		}
+
+		// Do we need to do low quality encoding?
+		if (src->lq_count > 0) {
+			if (!src->lq_encoder_c1) src->lq_encoder_c1 = ftl::codecs::allocateEncoder(
+					definition_t::SD480, device_t::Software);
+			if (!src->lq_encoder_c2 && hasChan2) src->lq_encoder_c2 = ftl::codecs::allocateEncoder(
+					definition_t::SD480, device_t::Software);
+
+			// Do we have the resources to do a LQ encoding?
+			if (src->lq_encoder_c1 && (!hasChan2 || src->lq_encoder_c2)) {
+				auto *enc1 = src->lq_encoder_c1;
+				auto *enc2 = src->lq_encoder_c2;
+
+				// Important to send channel 2 first if needed...
+				// Receiver only waits for channel 1 by default
+				if (hasChan2) {
+					enc2->encode(fs.channel2[j], src->lq_bitrate, [this,src,hasChan2](const ftl::codecs::Packet &blk){
+						_transmitPacket(src, blk, 1, hasChan2, false);
+					});
+				} else {
+					if (enc2) enc2->reset();
+				}
+
+				enc1->encode(fs.channel1[j], src->lq_bitrate, [this,src,hasChan2](const ftl::codecs::Packet &blk){
+					_transmitPacket(src, blk, 0, hasChan2, false);
+				});
+			}
 		}
 
-		jobs_ += chunk_count_;
+		// Do we need to do low quality encoding?
+		/*if (src->lq_count > 0) {
+			if (!src->lq_encoder_c1) src->lq_encoder_c1 = ftl::codecs::allocateLQEncoder();
+			if (!src->lq_encoder_c2) src->lq_encoder_c2 = ftl::codecs::allocateLQEncoder();
+
+			// Do we have the resources to do a LQ encoding?
+			if (src->lq_encoder_c1 && src->lq_encoder_c2) {
+				const auto *enc1 = src->lq_encoder_c1;
+				const auto *enc2 = src->lq_encoder_c2;
+
+				// Do entire frame as single step
+				if (!enc1->useBlocks() || !enc2->useBlocks()) {
+					ftl::pool.push([this,&fs,j,src](int id) {
+						_encodeLQAndTransmit(src, fs.channel1[j], fs.channel2[j], -1);
+						std::unique_lock<std::mutex> lk(job_mtx_);
+						--jobs_;
+						if (jobs_ == 0) job_cv_.notify_one();
+					});
+
+					jobs_++;
+				// Or divide frame into blocks and encode each
+				} else {
+					// Create jobs for each chunk
+					for (int i=0; i<chunk_count_; ++i) {
+						// Add chunk job to thread pool
+						ftl::pool.push([this,&fs,j,i,src](int id) {
+							int chunk = i;
+							try {
+								_encodeLQAndTransmit(src, fs.channel1[j], fs.channel2[j], chunk);
+							} catch(...) {
+								LOG(ERROR) << "Encode Exception: " << chunk;
+							}
+
+							//src->jobs--;
+							std::unique_lock<std::mutex> lk(job_mtx_);
+							--jobs_;
+							if (jobs_ == 0) job_cv_.notify_one();
+						});
+					}
+
+					jobs_ += chunk_count_;
+				}
+			}
+		}*/
 	}
 
-	std::unique_lock<std::mutex> lk(job_mtx_);
+	/*std::unique_lock<std::mutex> lk(job_mtx_);
 	job_cv_.wait_for(lk, std::chrono::seconds(20), [this]{ return jobs_ == 0; });
 	if (jobs_ != 0) {
 		LOG(FATAL) << "Deadlock detected";
-	}
+	}*/
 
 	// Go to sleep if no clients instead of spinning the cpu
 	if (totalclients == 0 || sources_.size() == 0) {
 		// Make sure to unlock so clients can connect!
-		lk.unlock();
+		//lk.unlock();
 		slk.unlock();
 		sleep_for(milliseconds(50));
 	} else _cleanUp();
 }
 
-void Streamer::_encodeAndTransmit(StreamSource *src, const cv::Mat &rgb, const cv::Mat &depth, int chunk) {
+void Streamer::_transmitPacket(StreamSource *src, const ftl::codecs::Packet &pkt, int chan, bool hasChan2, bool hqonly) {
+	ftl::codecs::StreamPacket spkt = {
+		frame_no_,
+		static_cast<uint8_t>((chan & 0x1) | ((hasChan2) ? 0x2 : 0x0))
+	};
+
+	// Lock to prevent clients being added / removed
+	//SHARED_LOCK(src->mutex,lk);
+	auto c = src->clients.begin();
+	while (c != src->clients.end()) {
+		const ftl::codecs::preset_t b = (*c).preset;
+		if ((hqonly && b >= kQualityThreshold) || (!hqonly && b < kQualityThreshold)) {
+			++c;
+			continue;
+		}
+
+		try {
+			// TODO:(Nick) Send pose
+			short pre_transmit_latency = short(ftl::timer::get_time() - spkt.timestamp);
+			if (!net_->send((*c).peerid,
+					(*c).uri,
+					pre_transmit_latency,  // Time since timestamp for tx
+					spkt,
+					pkt)) {
+
+				// Send failed so mark as client stream completed
+				(*c).txcount = (*c).txmax;
+			} else {
+				// Count frame as completed only if last block and channel is 0
+				if (pkt.block_number == pkt.block_total - 1 && chan == 0) ++(*c).txcount;
+			}
+		} catch(...) {
+			(*c).txcount = (*c).txmax;
+		}
+		++c;
+	}
+}
+
+/*void Streamer::_encodeHQAndTransmit(StreamSource *src, const cv::Mat &c1, const cv::Mat &c2, int block) {
+	bool hasChan2 = (!c2.empty() && src->src->getChannel() != ftl::rgbd::kChanNone);
+
+	LOG(INFO) << "Encode HQ: " << block;
+
+	vector<unsigned char> c1buff;
+	vector<unsigned char> c2buff;
+
+	if (block == -1) {
+		src->hq_encoder_c1->encode(c1, c1buff, src->hq_bitrate, false);
+		if (hasChan2) src->hq_encoder_c2->encode(c2, c2buff, src->hq_bitrate, false);
+	} else {
+		//bool delta = (chunk+src->frame) % 8 > 0;  // Do XOR or not
+		int chunk_width = c1.cols / chunk_dim_;
+		int chunk_height = c1.rows / chunk_dim_;
+
+		// Build chunk heads
+		int cx = (block % chunk_dim_) * chunk_width;
+		int cy = (block / chunk_dim_) * chunk_height;
+		cv::Rect roi(cx,cy,chunk_width,chunk_height);
+		//vector<unsigned char> rgb_buf;
+		cv::Mat chunkRGB = c1(roi);
+		src->hq_encoder_c1->encode(chunkRGB, c1buff, src->hq_bitrate, false);
+
+		if (hasChan2) {
+			cv::Mat chunkDepth = c2(roi);
+			src->hq_encoder_c2->encode(chunkDepth, c2buff, src->hq_bitrate, false);
+		}
+	}
+
+	// Lock to prevent clients being added / removed
+	SHARED_LOCK(src->mutex,lk);
+	auto c = src->clients.begin();
+	while (c != src->clients.end()) {
+		const int b = (*c).bitrate;
+		if (b >= kQualityThreshold) continue; // Not a HQ request
+
+		try {
+			// TODO:(Nick) Send pose
+			short pre_transmit_latency = short(ftl::timer::get_time() - frame_no_);
+			if (!net_->send((*c).peerid, (*c).uri, frame_no_, pre_transmit_latency, uint8_t(src->hq_bitrate), block, c1buff, c2buff)) {
+				// Send failed so mark as client stream completed
+				(*c).txcount = (*c).txmax;
+			} else {
+				++(*c).txcount;
+				//LOG(INFO) << "SENT CHUNK : " << frame_no_ << "-" << chunk;
+			}
+		} catch(...) {
+			(*c).txcount = (*c).txmax;
+		}
+		++c;
+	}
+}
+
+void Streamer::_encodeLQAndTransmit(StreamSource *src, const cv::Mat &c1, const cv::Mat &c2, int block) {
+	bool hasChan2 = (!c2.empty() && src->src->getChannel() != ftl::rgbd::kChanNone);
+
+	LOG(INFO) << "Encode LQ: " << block;
+
+	vector<unsigned char> c1buff;
+	vector<unsigned char> c2buff;
+
+	if (block == -1) {
+		src->lq_encoder_c1->encode(c1, c1buff, src->lq_bitrate, false);
+		if (hasChan2) src->lq_encoder_c2->encode(c2, c2buff, src->lq_bitrate, false);
+	} else {
+		//bool delta = (chunk+src->frame) % 8 > 0;  // Do XOR or not
+		int chunk_width = c1.cols / chunk_dim_;
+		int chunk_height = c1.rows / chunk_dim_;
+
+		// Build chunk heads
+		int cx = (block % chunk_dim_) * chunk_width;
+		int cy = (block / chunk_dim_) * chunk_height;
+		cv::Rect roi(cx,cy,chunk_width,chunk_height);
+		//vector<unsigned char> rgb_buf;
+		cv::Mat chunkRGB = c1(roi);
+		//cv::resize(chunkRGB, downrgb, cv::Size(ABRController::getColourWidth(b) / chunk_dim_, ABRController::getColourHeight(b) / chunk_dim_));
+
+		src->lq_encoder_c1->encode(chunkRGB, c1buff, src->lq_bitrate, false);
+
+		if (hasChan2) {
+			cv::Mat chunkDepth = c2(roi);
+			//cv::resize(chunkDepth, tmp, cv::Size(ABRController::getDepthWidth(b) / chunk_dim_, ABRController::getDepthHeight(b) / chunk_dim_), 0, 0, cv::INTER_NEAREST);
+			src->lq_encoder_c2->encode(chunkDepth, c2buff, src->lq_bitrate, false);
+		}
+	}
+
+	// Lock to prevent clients being added / removed
+	SHARED_LOCK(src->mutex,lk);
+	auto c = src->clients.begin();
+	while (c != src->clients.end()) {
+		const int b = (*c).bitrate;
+		if (b < kQualityThreshold) continue; // Not an LQ request
+
+		try {
+			// TODO:(Nick) Send pose
+			short pre_transmit_latency = short(ftl::timer::get_time() - frame_no_);
+			if (!net_->send((*c).peerid, (*c).uri, frame_no_, pre_transmit_latency, uint8_t(src->hq_bitrate), block, c1buff, c2buff)) {
+				// Send failed so mark as client stream completed
+				(*c).txcount = (*c).txmax;
+			} else {
+				++(*c).txcount;
+				//LOG(INFO) << "SENT CHUNK : " << frame_no_ << "-" << chunk;
+			}
+		} catch(...) {
+			(*c).txcount = (*c).txmax;
+		}
+		++c;
+	}
+}*/
+
+/*void Streamer::_encodeImagesAndTransmit(StreamSource *src, const cv::Mat &rgb, const cv::Mat &depth, int chunk) {
 	bool hasChan2 = (!depth.empty() && src->src->getChannel() != ftl::rgbd::kChanNone);
 
 	//bool delta = (chunk+src->frame) % 8 > 0;  // Do XOR or not
@@ -383,8 +680,8 @@ void Streamer::_encodeAndTransmit(StreamSource *src, const cv::Mat &rgb, const c
 		if (brgb[b].empty()) {
 			// Max bitrate means no changes
 			if (b == 0) {
-				_encodeChannel1(chunkRGB, brgb[b], b);
-				if (hasChan2) _encodeChannel2(d2, bdepth[b], src->src->getChannel(), b);
+				_encodeImageChannel1(chunkRGB, brgb[b], b);
+				if (hasChan2) _encodeImageChannel2(d2, bdepth[b], src->src->getChannel(), b);
 
 			// Otherwise must downscale and change compression params
 			} else {
@@ -392,15 +689,15 @@ void Streamer::_encodeAndTransmit(StreamSource *src, const cv::Mat &rgb, const c
 				cv::resize(chunkRGB, downrgb, cv::Size(ABRController::getColourWidth(b) / chunk_dim_, ABRController::getColourHeight(b) / chunk_dim_));
 				if (hasChan2) cv::resize(d2, downdepth, cv::Size(ABRController::getDepthWidth(b) / chunk_dim_, ABRController::getDepthHeight(b) / chunk_dim_), 0, 0, cv::INTER_NEAREST);
 
-				_encodeChannel1(downrgb, brgb[b], b);
-				if (hasChan2) _encodeChannel2(downdepth, bdepth[b], src->src->getChannel(), b);
+				_encodeImageChannel1(downrgb, brgb[b], b);
+				if (hasChan2) _encodeImageChannel2(downdepth, bdepth[b], src->src->getChannel(), b);
 			}
 		}
 
 		try {
 			// TODO:(Nick) Send pose
 			short pre_transmit_latency = short(ftl::timer::get_time() - frame_no_);
-			if (!net_->send((*c).peerid, (*c).uri, frame_no_, pre_transmit_latency, chunk, brgb[b], bdepth[b])) {
+			if (!net_->send((*c).peerid, (*c).uri, frame_no_, pre_transmit_latency, uint8_t(b), chunk, brgb[b], bdepth[b])) {
 				// Send failed so mark as client stream completed
 				(*c).txcount = (*c).txmax;
 			} else {
@@ -412,60 +709,14 @@ void Streamer::_encodeAndTransmit(StreamSource *src, const cv::Mat &rgb, const c
 		}
 		++c;
 	}
-
-	// For each allowed bitrate setting (0 = max quality)
-	/*for (unsigned int b=0; b<10; ++b) {
-		{
-			//SHARED_LOCK(src->mutex,lk);
-			if (src->clients[b].size() == 0) continue;
-		}
-		
-		// Max bitrate means no changes
-		if (b == 0) {
-			_encodeChannel1(chunkRGB, rgb_buf, b);
-			if (hasChan2) _encodeChannel2(d2, d_buf, src->src->getChannel(), b);
-
-		// Otherwise must downscale and change compression params
-		// TODO:(Nick) could reuse downscales
-		} else {
-			cv::Mat downrgb, downdepth;
-			cv::resize(chunkRGB, downrgb, cv::Size(bitrate_settings[b].width / chunk_dim_, bitrate_settings[b].height / chunk_dim_));
-			if (hasChan2) cv::resize(d2, downdepth, cv::Size(bitrate_settings[b].width / chunk_dim_, bitrate_settings[b].height / chunk_dim_));
-
-			_encodeChannel1(downrgb, rgb_buf, b);
-			if (hasChan2) _encodeChannel2(downdepth, d_buf, src->src->getChannel(), b);
-		}
-
-		//if (chunk == 0) LOG(INFO) << "Sending chunk " << chunk << " : size = " << (d_buf.size()+rgb_buf.size()) << "bytes";
-
-		// Lock to prevent clients being added / removed
-		SHARED_LOCK(src->mutex,lk);
-		auto c = src->clients[b].begin();
-		while (c != src->clients[b].end()) {
-			try {
-				// TODO:(Nick) Send pose
-				short pre_transmit_latency = short(ftl::timer::get_time() - frame_no_);
-				if (!net_->send((*c).peerid, (*c).uri, frame_no_, pre_transmit_latency, chunk, rgb_buf, d_buf)) {
-					// Send failed so mark as client stream completed
-					(*c).txcount = (*c).txmax;
-				} else {
-					++(*c).txcount;
-					//LOG(INFO) << "SENT CHUNK : " << frame_no_ << "-" << chunk;
-				}
-			} catch(...) {
-				(*c).txcount = (*c).txmax;
-			}
-			++c;
-		}
-	}*/
 }
 
-void Streamer::_encodeChannel1(const cv::Mat &in, vector<unsigned char> &out, unsigned int b) {
+void Streamer::_encodeImageChannel1(const cv::Mat &in, vector<unsigned char> &out, unsigned int b) {
 	vector<int> jpgparams = {cv::IMWRITE_JPEG_QUALITY, ABRController::getColourQuality(b)};
 	cv::imencode(".jpg", in, out, jpgparams);
 }
 
-bool Streamer::_encodeChannel2(const cv::Mat &in, vector<unsigned char> &out, ftl::rgbd::channel_t c, unsigned int b) {
+bool Streamer::_encodeImageChannel2(const cv::Mat &in, vector<unsigned char> &out, ftl::rgbd::channel_t c, unsigned int b) {
 	if (c == ftl::rgbd::kChanNone) return false;  // NOTE: Should not happen
 
 	if (isFloatChannel(c) && in.type() == CV_16U && in.channels() == 1) {
@@ -490,4 +741,4 @@ Source *Streamer::get(const std::string &uri) {
 	SHARED_LOCK(mutex_,slk);
 	if (sources_.find(uri) != sources_.end()) return sources_[uri]->src;
 	else return nullptr;
-}
+}*/
diff --git a/config/config_nick.jsonc b/config/config_nick.jsonc
index 2dac067a2..53673a170 100644
--- a/config/config_nick.jsonc
+++ b/config/config_nick.jsonc
@@ -128,7 +128,15 @@
 				"SDFUseGradients": false,
 				"showBlockBorders": false
 			},
-			"baseline": 0.5,
+			"baseline": 0.05,
+			"focal": 700,
+			"width": 1280,
+			"height": 720,
+			"maxDepth": 15.0,
+			"minDepth": 0.05,
+			"splatting": true,
+			"texturing": true,
+			"upsampling": false,
 			"uri": "device:virtual"
 		}
 	},
@@ -150,7 +158,7 @@
 			"confidenceThreshold": 0.0,
 			"mls": true,
 			"voxels": false,
-			"clipping": true,
+			"clipping": false,
 			"bbox_x_max": 0.6,
 			"bbox_x_min": -0.6,
 			"bbox_y_max": 3.0,
diff --git a/web-service/client/.gitignore b/web-service/client/.gitignore
new file mode 100644
index 000000000..927d17bb9
--- /dev/null
+++ b/web-service/client/.gitignore
@@ -0,0 +1,18 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
diff --git a/web-service/client/package-lock.json b/web-service/client/package-lock.json
new file mode 100644
index 000000000..14231a541
--- /dev/null
+++ b/web-service/client/package-lock.json
@@ -0,0 +1,13159 @@
+{
+  "name": "client",
+  "version": "0.1.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
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diff --git a/web-service/client/package.json b/web-service/client/package.json
new file mode 100644
index 000000000..e8f24e819
--- /dev/null
+++ b/web-service/client/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "client",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "react": "^16.9.0",
+    "react-dom": "^16.9.0",
+    "react-scripts": "^3.1.1"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test --env=jsdom",
+    "eject": "react-scripts eject"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/web-service/client/public/index.html b/web-service/client/public/index.html
new file mode 100644
index 000000000..aab5e3b00
--- /dev/null
+++ b/web-service/client/public/index.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <!--
+      Notice the use of %PUBLIC_URL% in the tag above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start`.
+      To create a production bundle, use `npm run build`.
+    -->
+  </body>
+</html>
diff --git a/web-service/client/services/login.js b/web-service/client/services/login.js
new file mode 100644
index 000000000..b7118a600
--- /dev/null
+++ b/web-service/client/services/login.js
@@ -0,0 +1,9 @@
+import axios from 'axios'
+const baseUrl = 'http://localhost:8080/google'
+
+const login = async credentials => {
+  const response = await axios.post(baseUrl)
+  return response.data
+}
+
+export default { login }
\ No newline at end of file
diff --git a/web-service/client/src/App.css b/web-service/client/src/App.css
new file mode 100644
index 000000000..e2f834bb1
--- /dev/null
+++ b/web-service/client/src/App.css
@@ -0,0 +1,41 @@
+body {
+  margin-left: auto;
+  margin-right: auto;
+}
+a {
+  -webkit-tap-highlight-color: transparent;
+  text-decoration: none;
+ }
+ 
+ .button {
+  display: inline-block;
+  max-width: 300px;
+  margin-top: 50px;
+  border: 0;
+  padding: 0 18px;
+  text-align: left;
+  width: 100%;
+  height: 37px;
+  border-radius: 4px;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  -moz-font-feature-settings: "liga" on;
+  color: rgba(0, 0, 0, 0.84) !important;
+  fill: rgba(0, 0, 0, 0.84) !important;
+  box-shadow: 0 1px 7px rgba(0, 0, 0, 0.05);
+  font: inherit;
+  outline: none;
+ }
+ 
+ .button .svgIcon {
+  vertical-align: middle;
+  fill: rgba(0, 0, 0, 0.54);
+  padding-right: 4px;
+  height: 37px;
+  display: inline-block;
+ }
+
+.div {
+  vertical-align: center;
+  text-align: center
+}
\ No newline at end of file
diff --git a/web-service/client/src/App.js b/web-service/client/src/App.js
new file mode 100644
index 000000000..72edd8cc3
--- /dev/null
+++ b/web-service/client/src/App.js
@@ -0,0 +1,51 @@
+import React, { useState } from 'react';
+import './App.css'
+//import Streams from 'Streams'
+
+const App = () => {
+
+    const [user, setUser] = useState(null);
+    const [username, setUsername] = useState('');
+
+    const handleLogin = () => {
+        /* User clicks on the image of either Haka login or Google Oauth
+        Server redirects the user then to google oauths site or to the haka site */
+
+        //BEFORE BUILD CHANGE THE URL TO /google
+        //Otherwise it wont work as a static build in node server
+        window.location.href="/google";
+    }
+
+    if(user === null){
+        return (
+            <div>
+                <h2>Welcome to Future Technology Lab</h2>
+                <h3>Please login!</h3>
+                <a class="button" onClick={handleLogin}>
+                    <div>
+                        <span class="svgIcon t-popup-svg">
+                            <svg class="svgIcon-use" width="25" height="37" viewBox="0 0 25 25">
+                                <g fill="none" fill-rule="evenodd">
+                                <path d="M20.66 12.693c0-.603-.054-1.182-.155-1.738H12.5v3.287h4.575a3.91 3.91 0 0 1-1.697 2.566v2.133h2.747c1.608-1.48 2.535-3.65 2.535-6.24z" fill="#4285F4"/>
+                                <path d="M12.5 21c2.295 0 4.22-.76 5.625-2.06l-2.747-2.132c-.76.51-1.734.81-2.878.81-2.214 0-4.088-1.494-4.756-3.503h-2.84v2.202A8.498 8.498 0 0 0 12.5 21z" fill="#34A853"/>
+                                <path d="M7.744 14.115c-.17-.51-.267-1.055-.267-1.615s.097-1.105.267-1.615V8.683h-2.84A8.488 8.488 0 0 0 4 12.5c0 1.372.328 2.67.904 3.817l2.84-2.202z" fill="#FBBC05"/>
+                                <path d="M12.5 7.38c1.248 0 2.368.43 3.25 1.272l2.437-2.438C16.715 4.842 14.79 4 12.5 4a8.497 8.497 0 0 0-7.596 4.683l2.84 2.202c.668-2.01 2.542-3.504 4.756-3.504z" fill="#EA4335"/>
+                                </g>
+                            </svg>
+                        </span>
+                        <span class="button-label">Sign in with Google</span>
+                    </div>
+                </a>
+            </div>
+            
+        )
+    }else {
+        return(
+        <div>
+            <h1>IT WORKS!!</h1>
+            <h2>Namibia here we come!</h2>
+        </div>
+        )
+    }
+}
+export default App;   
\ No newline at end of file
diff --git a/web-service/client/src/Streams.js b/web-service/client/src/Streams.js
new file mode 100644
index 000000000..a3b02ca4a
--- /dev/null
+++ b/web-service/client/src/Streams.js
@@ -0,0 +1,7 @@
+
+
+/* This file will contain list of streams.
+The user is able to select which stream he/she will WebAuthentication.
+
+The user will be redirected to Stream.js file  
+*/
\ No newline at end of file
diff --git a/web-service/client/src/index.js b/web-service/client/src/index.js
new file mode 100644
index 000000000..0ea36197b
--- /dev/null
+++ b/web-service/client/src/index.js
@@ -0,0 +1,8 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+ReactDOM.render(
+  <App />,
+  document.getElementById('root')
+);
diff --git a/web-service/server/package-lock.json b/web-service/server/package-lock.json
new file mode 100644
index 000000000..1cbb0937c
--- /dev/null
+++ b/web-service/server/package-lock.json
@@ -0,0 +1,511 @@
+{
+  "name": "@ftl/web-service",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
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+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "async-limiter": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
+      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
+    },
+    "base64url": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/base64url/-/base64url-3.0.1.tgz",
+      "integrity": "sha512-ir1UPr3dkwexU7FdV8qBBbNDRUhMmIekYMFZfi+C/sLNnRESKPl23nB9b2pltqfOQNnGzsDdId90AEtG5tCx4A=="
+    },
+    "bl": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
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+      "requires": {
+        "readable-stream": "^2.3.5",
+        "safe-buffer": "^5.1.1"
+      }
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+    "body-parser": {
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+      "requires": {
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+      "integrity": "sha512-Xo7nE9ZfBVonQi1rSopNAqPdts/QHyuSEUwIEzAkB+V2FtmkkLUbP6MyVqVVQxsZYI65FpvW3Bb8Z9ZWEjbgHQ==",
+      "requires": {
+        "bl": "^2.0.1",
+        "inherits": "^2.0.3",
+        "readable-stream": "^2.3.6",
+        "safe-buffer": "^5.1.2"
+      }
+    },
+    "negotiator": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.2.tgz",
+      "integrity": "sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw=="
+    },
+    "oauth": {
+      "version": "0.9.15",
+      "resolved": "https://registry.npmjs.org/oauth/-/oauth-0.9.15.tgz",
+      "integrity": "sha1-vR/vr2hslrdUda7VGWQS/2DPucE="
+    },
+    "on-finished": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
+      "integrity": "sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=",
+      "requires": {
+        "ee-first": "1.1.1"
+      }
+    },
+    "parseurl": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
+      "integrity": "sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ=="
+    },
+    "passport": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/passport/-/passport-0.4.0.tgz",
+      "integrity": "sha1-xQlWkTR71a07XhgCOMORTRbwWBE=",
+      "requires": {
+        "passport-strategy": "1.x.x",
+        "pause": "0.0.1"
+      }
+    },
+    "passport-google-oauth20": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/passport-google-oauth20/-/passport-google-oauth20-2.0.0.tgz",
+      "integrity": "sha512-KSk6IJ15RoxuGq7D1UKK/8qKhNfzbLeLrG3gkLZ7p4A6DBCcv7xpyQwuXtWdpyR0+E0mwkpjY1VfPOhxQrKzdQ==",
+      "requires": {
+        "passport-oauth2": "1.x.x"
+      }
+    },
+    "passport-oauth2": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/passport-oauth2/-/passport-oauth2-1.5.0.tgz",
+      "integrity": "sha512-kqBt6vR/5VlCK8iCx1/KpY42kQ+NEHZwsSyt4Y6STiNjU+wWICG1i8ucc1FapXDGO15C5O5VZz7+7vRzrDPXXQ==",
+      "requires": {
+        "base64url": "3.x.x",
+        "oauth": "0.9.x",
+        "passport-strategy": "1.x.x",
+        "uid2": "0.0.x",
+        "utils-merge": "1.x.x"
+      }
+    },
+    "passport-strategy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/passport-strategy/-/passport-strategy-1.0.0.tgz",
+      "integrity": "sha1-tVOaqPwiWj0a0XlHbd8ja0QPUuQ="
+    },
+    "path-to-regexp": {
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
+      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
+    },
+    "pause": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
+      "integrity": "sha1-HUCLP9t2kjuVQ9lvtMnf1TXZy10="
+    },
+    "process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
+    },
+    "proxy-addr": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.5.tgz",
+      "integrity": "sha512-t/7RxHXPH6cJtP0pRG6smSr9QJidhB+3kXu0KgXnbGYMgzEnUxRQ4/LDdfOwZEMyIh3/xHb8PX3t+lfL9z+YVQ==",
+      "requires": {
+        "forwarded": "~0.1.2",
+        "ipaddr.js": "1.9.0"
+      }
+    },
+    "qs": {
+      "version": "6.7.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
+      "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
+    },
+    "range-parser": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
+      "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg=="
+    },
+    "raw-body": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.4.0.tgz",
+      "integrity": "sha512-4Oz8DUIwdvoa5qMJelxipzi/iJIi40O5cGV1wNYp5hvZP8ZN0T+jiNkL0QepXs+EsQ9XJ8ipEDoiH70ySUJP3Q==",
+      "requires": {
+        "bytes": "3.1.0",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "unpipe": "1.0.0"
+      }
+    },
+    "readable-stream": {
+      "version": "2.3.6",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+      "requires": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+    },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
+    "send": {
+      "version": "0.17.1",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
+      "integrity": "sha512-BsVKsiGcQMFwT8UxypobUKyv7irCNRHk1T0G680vk88yf6LBByGcZJOTJCrTP2xVN6yI+XjPJcNuE3V4fT9sAg==",
+      "requires": {
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "destroy": "~1.0.4",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "0.5.2",
+        "http-errors": "~1.7.2",
+        "mime": "1.6.0",
+        "ms": "2.1.1",
+        "on-finished": "~2.3.0",
+        "range-parser": "~1.2.1",
+        "statuses": "~1.5.0"
+      },
+      "dependencies": {
+        "ms": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
+        }
+      }
+    },
+    "serve-static": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
+      "integrity": "sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==",
+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.3",
+        "send": "0.17.1"
+      }
+    },
+    "setprototypeof": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+      "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw=="
+    },
+    "statuses": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
+      "integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow="
+    },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "toidentifier": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
+      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw=="
+    },
+    "type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      }
+    },
+    "uid2": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/uid2/-/uid2-0.0.3.tgz",
+      "integrity": "sha1-SDEm4Rd03y9xuLY53NeZw3YWK4I="
+    },
+    "unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "ws": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
+      "integrity": "sha512-jaHFD6PFv6UgoIVda6qZllptQsMlDEJkTQcybzzXDYM1XO9Y8em691FGMPmM46WGyLU4z9KMgQN+qrux/nhlHA==",
+      "requires": {
+        "async-limiter": "~1.0.0"
+      }
+    }
+  }
+}
diff --git a/web-service/server/package.json b/web-service/server/package.json
index c47b32652..144a1089e 100644
--- a/web-service/server/package.json
+++ b/web-service/server/package.json
@@ -16,9 +16,8 @@
   "dependencies": {
     "express": "^4.16.4",
     "express-ws": "^4.0.0",
-    "msgpack5": "^4.2.1"
-  },
-  "devDependencies": {
-    "nodemon": "^1.19.2"
+    "msgpack5": "^4.2.1",
+    "passport": "^0.4.0",
+    "passport-google-oauth20": "^2.0.0"
   }
 }
diff --git a/web-service/server/src/index.js b/web-service/server/src/index.js
index d168efb56..7576bae18 100644
--- a/web-service/server/src/index.js
+++ b/web-service/server/src/index.js
@@ -2,8 +2,21 @@ const express = require('express');
 const app = express();
 const expressWs = require('express-ws')(app);
 const Peer = require('./peer.js');
+const passport = require('passport');
+const passportSetup = require('./passport/passport');
 
 // ---- INDEXES ----------------------------------------------------------------
+app.use(passport.initialize());
+app.use(passport.session());
+app.use(express.static('build'))
+
+passport.serializeUser((user, done) => {
+    done(null, user);
+})
+
+passport.deserializeUser((userDataFromCookie, done) => {
+    done(null, userDataFromCookie);
+})
 
 let peer_by_id = {};
 //let uri_to_peer = {};
@@ -11,32 +24,56 @@ let peer_uris = {};
 
 let uri_data = {};
 
+/**
+ * A client stream request object. Each source maintains a list of clients who
+ * are wanting frames from that source. Clients can only request N frames at a
+ * time, after that if no new request is received then the client is removed.
+ * 
+ * @param {Peer} peer Peer websocket wrapper
+ * @param {number} N Number of frames requested
+ * @param {number} rate Bitrate index requested
+ * @param {string} dest URI destination
+ */
 function RGBDClient(peer, N, rate, dest) {
 	this.peer = peer;
-	this.txmax = N;
+	this.txmax = N*16;  // 16 is for 16 blocks per frame... this will change in the near future
 	this.rate = rate;
 	this.dest = dest;
 	this.txcount = 0;
 }
 
-RGBDClient.prototype.push = function(uri, rgb, depth) {
-	this.peer.send(uri, rgb, depth);
+/**
+ * Actually send a frame over network to the client.
+ */
+RGBDClient.prototype.push = function(uri, frame, ttime, chunk,  rgb, depth) {
+	this.peer.send(uri, frame, ttime, chunk, rgb, depth);
 	this.txcount++;
 }
 
+/**
+ * A video stream. Each peer provides a list of these streams. Each stream can
+ * receive frames from the source and forward those frames to any clients.
+ * Therefore each of these stream objects maintains a list of clients and
+ * loops over them whenever a new frame is received.
+ * 
+ * @param {string} uri Address of the stream
+ * @param {Peer} peer Origin of the stream
+ */
 function RGBDStream(uri, peer) {
 	this.uri = uri;
 	this.peer = peer;
 	this.title = "";
-	this.rgb = null;
-	this.depth = null;
+	this.rgb = null;		// TODO: No longer works as an image
+	this.depth = null;		// TODO: No longer works as an image
 	this.pose = null;
 	this.clients = [];
 	this.rxcount = 10;
 	this.rxmax = 10;
 
-	peer.bind(uri, (rgb, depth) => {
-		this.pushFrames(rgb, depth);
+	// Add RPC handler to receive frames from the source
+	peer.bind(uri, (frame, ttime, chunk, rgb, depth) => {
+		// Forward frames to all clients
+		this.pushFrames(frame, ttime, chunk, rgb, depth);
 		this.rxcount++;
 		if (this.rxcount >= this.rxmax && this.clients.length > 0) {
 			this.subscribe();
@@ -60,16 +97,16 @@ RGBDStream.prototype.addClient = function(peer, N, rate, dest) {
 RGBDStream.prototype.subscribe = function() {
 	this.rxcount = 0;
 	this.rxmax = 10;
-	console.log("Subscribe to ", this.uri);
+	//console.log("Subscribe to ", this.uri);
 	this.peer.send("get_stream", this.uri, 10, 0, [Peer.uuid], this.uri);
 }
 
-RGBDStream.prototype.pushFrames = function(rgb, depth) {
+RGBDStream.prototype.pushFrames = function(frame, ttime, chunk, rgb, depth) {
 	this.rgb = rgb;
 	this.depth = depth;
 
 	for (let i=0; i < this.clients.length; i++) {
-		this.clients[i].push(this.uri, rgb, depth);
+		this.clients[i].push(this.uri, frame, ttime, chunk, rgb, depth);
 	}
 
 	let i=0;
@@ -115,6 +152,30 @@ app.get('/stream/depth', (req, res) => {
 
 //app.get('/stream', (req, res))
 
+/** 
+ * Route for Google authentication API
+*/
+app.get('/google', passport.authenticate('google', {
+	scope: ['profile']
+}))
+
+/** 
+ * Google authentication API callback route. 
+ * Sets the JWT to clients browser and redirects the user back to React app.
+*/
+app.get('/auth/google/redirect', passport.authenticate('google'), (req, res) => {
+	const htmlWithEmbeddedJWT = `
+    <html>
+        <body><h3> You will be automatically redirected to next page.<h3><body>
+        <script>
+			window.localStorage.setItem('token', 'bearer token');
+			window.location.href = '/';
+        </script>
+    <html>
+    `;
+    res.send(htmlWithEmbeddedJWT)
+})
+
 function checkStreams(peer) {
 	if (!peer.master) {
 		peer.rpc("list_streams", (streams) => {
@@ -143,7 +204,7 @@ app.ws('/', (ws, req) => {
 	let p = new Peer(ws);
 
 	p.on("connect", (peer) => {
-		console.log("Node connected...");
+		console.log("Node connected...", peer.string_id);
 		peer_uris[peer.string_id] = [];
 		peer_by_id[peer.string_id] = peer;
 
@@ -154,6 +215,7 @@ app.ws('/', (ws, req) => {
 			peer.name = obj.title;
 			peer.master = (obj.kind == "master");
 			console.log("Peer name = ", peer.name);
+			console.log("Details: ", details);
 
 			checkStreams(peer);
 		});
@@ -179,6 +241,15 @@ app.ws('/', (ws, req) => {
 		checkStreams(p);
 	});
 
+	// Used to sync clocks
+	p.bind("__ping__", () => {
+		return Date.now();
+	});
+
+	p.bind("node_details", () => {
+		return ['{"title": "FTL Web-Service", "id": "0", "kind": "master"}'];
+	});
+
 	p.bind("list_streams", () => {
 		return Object.keys(uri_data);
 	});
@@ -193,15 +264,25 @@ app.ws('/', (ws, req) => {
 		}
 	});
 
-	p.proxy("source_calibration", (cb, uri) => {
+	// Requests camera calibration information
+	p.proxy("source_details", (cb, uri, chan) => {
 		let peer = uri_data[uri].peer;
 		if (peer) {
-			peer.rpc("source_calibration", cb, uri);
+			peer.rpc("source_details", cb, uri, chan);
 		}
 	});
 
-	p.bind("set_pose", (uri, vec) => {
+	// Get the current position of a camera
+	p.proxy("get_pose", (cb, uri) => {
 		//console.log("SET POSE");
+		let peer = uri_data[uri].peer;
+		if (peer) {
+			peer.rpc("get_pose", cb, uri);
+		}
+	});
+
+	// Change the position of a camera
+	p.bind("set_pose", (uri, vec) => {
 		let peer = uri_data[uri].peer;
 		if (peer) {
 			uri_data[uri].pose = vec;
@@ -209,6 +290,7 @@ app.ws('/', (ws, req) => {
 		}
 	});
 
+	// Request from frames from a source
 	p.bind("get_stream", (uri, N, rate, pid, dest) => {
 		let peer = uri_data[uri].peer;
 		if (peer) {
@@ -217,6 +299,7 @@ app.ws('/', (ws, req) => {
 		}
 	});
 
+	// Register a new stream
 	p.bind("add_stream", (uri) => {
 		console.log("Adding stream: ", uri);
 		//uri_to_peer[streams[i]] = peer;
diff --git a/web-service/server/src/passport/passport.js b/web-service/server/src/passport/passport.js
new file mode 100644
index 000000000..35d1fd652
--- /dev/null
+++ b/web-service/server/src/passport/passport.js
@@ -0,0 +1,15 @@
+const passport = require('passport');
+const GoogleStrategy = require('passport-google-oauth20');
+const keys = require('./keys')
+
+passport.use(
+    new GoogleStrategy({
+        clientID: keys.google.clientID,
+        clientSecret: keys.google.clientSecret,
+        callbackURL: '/auth/google/redirect',
+        passReqToCallback: true
+    }, (req, accessToken, refreshToken, profile, done) => {
+
+        return done(null, profile)
+    })
+)
\ No newline at end of file
diff --git a/web-service/server/src/peer.js b/web-service/server/src/peer.js
index b1fc40dd8..51cd78e6a 100644
--- a/web-service/server/src/peer.js
+++ b/web-service/server/src/peer.js
@@ -6,6 +6,7 @@ const kConnecting = 1;
 const kConnected = 2;
 const kDisconnected = 3;
 
+// Generate a unique id for this webservice
 let my_uuid = new Uint8Array(16);
 my_uuid[0] = 44;
 my_uuid = Buffer.from(my_uuid);
@@ -13,6 +14,10 @@ my_uuid = Buffer.from(my_uuid);
 const kMagic = 0x0009340053640912;
 const kVersion = 0;
 
+/**
+ * Wrap a web socket with a MsgPack RCP protocol that works with our C++ version.
+ * @param {websocket} ws Websocket object
+ */
 function Peer(ws) {
 	this.sock = ws;
 	this.status = kConnecting;
@@ -79,26 +84,34 @@ function Peer(ws) {
 
 Peer.uuid = my_uuid;
 
+/**
+ * @private
+ */
 Peer.prototype._dispatchNotification = function(name, args) {
 	if (this.bindings.hasOwnProperty(name)) {
+		//console.log("Notification for: ", name);
 		this.bindings[name].apply(this, args);
 	} else {
 		console.log("Missing handler for: ", name);
 	}
 }
 
+/**
+ * @private
+ */
 Peer.prototype._dispatchCall = function(name, id, args) {
 	if (this.bindings.hasOwnProperty(name)) {
-		console.log("Call for:", name, id);
-		let res = this.bindings[name].apply(this, args);
+		//console.log("Call for:", name, id);
 
 		try {
+			let res = this.bindings[name].apply(this, args);
 			this.sock.send(encode([1,id,name,res]));
 		} catch(e) {
+			console.error("Could to dispatch or return call");
 			this.close();
 		}
 	} else if (this.proxies.hasOwnProperty(name)) {
-		console.log("Proxy for:", name, id);
+		//console.log("Proxy for:", name, id);
 		args.unshift((res) => {
 			try {
 				this.sock.send(encode([1,id,name,res]));
@@ -112,6 +125,9 @@ Peer.prototype._dispatchCall = function(name, id, args) {
 	}
 }
 
+/**
+ * @private
+ */
 Peer.prototype._dispatchResponse = function(id, res) {
 	if (this.callbacks.hasOwnProperty(id)) {
 		this.callbacks[id].call(this, res);
@@ -121,6 +137,14 @@ Peer.prototype._dispatchResponse = function(id, res) {
 	}
 }
 
+/**
+ * Register an RPC handler that will be called from a remote machine. Remotely
+ * passed arguments are provided to the given function as normal arguments, and
+ * if the function returns a value, it will be returned over the network also.
+ * 
+ * @param {string} name The name of the function
+ * @param {function} f A function or lambda to be callable remotely
+ */
 Peer.prototype.bind = function(name, f) {
 	if (this.bindings.hasOwnProperty(name)) {
 		//console.error("Duplicate bind to same procedure");
@@ -130,6 +154,10 @@ Peer.prototype.bind = function(name, f) {
 	}
 }
 
+/**
+ * Allow an RPC call to pass through to another machine with minimal local
+ * processing.
+ */
 Peer.prototype.proxy = function(name, f) {
 	if (this.proxies.hasOwnProperty(name)) {
 		//console.error("Duplicate proxy to same procedure");
@@ -139,6 +167,13 @@ Peer.prototype.proxy = function(name, f) {
 	}
 }
 
+/**
+ * Call a procedure on a remote machine.
+ * 
+ * @param {string} name Name of the procedure
+ * @param {function} cb Callback to receive return value as argument
+ * @param {...} args Any number of arguments to also pass to remote procedure
+ */
 Peer.prototype.rpc = function(name, cb, ...args) {
 	let id = this.cbid++;
 	this.callbacks[id] = cb;
@@ -158,6 +193,12 @@ Peer.prototype.sendB = function(name, args) {
 	}
 }
 
+/**
+ * Call a remote procedure but with no return value expected.
+ * 
+ * @param {string} name Name of the procedure
+ * @param {...} args Any number of arguments to also pass to remote procedure
+ */
 Peer.prototype.send = function(name, ...args) {
 	try {
 		this.sock.send(encode([0, name, args]));
@@ -171,6 +212,9 @@ Peer.prototype.close = function() {
 	this.status = kDisconnected;
 }
 
+/**
+ * @private
+ */
 Peer.prototype._notify = function(evt, ...args) {
 	if (this.events.hasOwnProperty(evt)) {
 		for (let i=0; i<this.events[evt].length; i++) {
@@ -180,6 +224,13 @@ Peer.prototype._notify = function(evt, ...args) {
 	}
 }
 
+/**
+ * Register a callback for socket events. Events include: 'connect',
+ * 'disconnect' and 'error'.
+ * 
+ * @param {string} evt Event name
+ * @param {function} f Callback on event
+ */
 Peer.prototype.on = function(evt, f) {
 	if (!this.events.hasOwnProperty(evt)) {
 		this.events[evt] = [];
-- 
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