std::(experimental::)mdspan testing

This repository contains my trial & error to understand std::(experimental::)mdspan well enough to use it with std::linalg. Right now I try to allow to have a std::ranges::view of an extent of an std::mdspan. The goal is to be able to use the iterators with the std algorithm's to test how good GCC (and Clang and perhaps others) generates code for it to evaluate the current usability for me. Stretch goal, if using proper execution policies with the std algorithm's is not sufficiently efficient, is to integrate them with std::(experimental::)simd . Feedback from the people working on the std::mdspan reference implementation and others would be really appreciated. It's my first time trying to contribute to the standard library.

Status Badges

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Project Structure

File/Directory	Description
.clang-format	Clang format configuration file based on llvm as this seems to be the main target of the mdspan reference implementation.
.clang-tidy	Clang tidy configuration file based on llvm as this seems to be the main target of the mdspan reference implementation.
.github/	GitHub related files. I should improve the content based on https://stackoverflow.com/a/61301254/1950725 .
CODEOWNERS	Code Owners File giving (only) me the ownership over everything in the repository.
dependabot.yml	DependaBot configuration file
workflow/	GitHub Action workflow files
ci.yml	GitHub Actions workflow file
.gitignore	Git ignore file
CMakeLists.txt	CMake build configuration file
LICENSE	License file, license intentionally equal to the one of the mdspan reference implementation.
README.md	Project readme file/ this file. Hopefully you find everything from here.
include/	C++ headers/ include files.
mdspan_extensions.hpp	Header file for my draft/ work-in-progress/ to-be-proposed mdspan extensions.
benchmark/	Google Benchmarks to be able to compare the performance using various execution policies and so on.
BenchmarkMain.cpp	Dummy Benchmarks right now, first the tests have to pass.
test/	Google Test based functionality tests to be passed before benchmarks make sense.
TestMain.cpp	The one and only tests right now I have.

Requirements

• C++26 compatible compiler
• CMake
• std::(experimental::)mdspan
• Google Benchmark
• Google Test

Building the Project

1. Clone the repository:

   git clone <repository-url>
   cd MDSpanTest
   

2. Create a build directory:

   mkdir build
   cd build
   

3. Configure the project using CMake:

   cmake ..
   

4. Build the project:

   cmake --build .
   

Running Tests

To run the Google Test cases, execute the following command in the build directory:

ctest

Running Benchmarks

To run the Google Benchmark tests, execute the following command in the build directory:

./benchmark/BenchmarkMain

CI/CD

This project includes a GitHub Actions workflow configured to build the project using all available C++26 toolchains, run the tests and benchmarks, and report the results. The workflow file is located at .github/workflows/ci.yml.

License

This project is licensed under the terms of the Apache License 2.0. See the LICENSE file for details.