This repository contains single-header libraries from the Magnum engine.

• Project homepage — https://magnum.graphics/
• Documentation — https://doc.magnum.graphics/
• GitHub project page — https://github.com/mosra/magnum-singles

LIBRARIES

There are the following single-header libraries at the moment. This list will grow with more Magnum features being exposed this way.

Library	LoC	PpLoC[1]	Description
CorradeArrayView.h	914	2026	Containers::ArrayView and Containers::StaticArrayView, lightweight alternatives to std::span
CorradeStridedArrayView.h	1313[2]	2858	Containers::StridedArrayView, multi-dimensional strided array view. Depends on CorradeArrayView.h.
CorradeArray.h	1060[2]	2727	Containers::Array and Containers::StaticArray, lightweight alternatives to std::vector and std::array. Depends on CorradeArrayView.h.
CorradeGrowableArray.h	1067[2]	4311	Growable APIs for Containers::Array. Depends on CorradeArray.h.
CorradeEnumSet.h	265	1705	Containers::EnumSet, a type-safe set of bits
CorradeFunction.h	511	1919	Containers::Function, a lightweight alternative to std::function
CorradeOptional.h	456	1879	Containers::Optional, a lightweight alternative to std::optional
CorradePair.h	420	1745	Containers::Pair, a lightweight alternative to std::pair
CorradePointer.h	381	1786	Containers::Pointer, a lightweight alternative to std::unique_ptr
CorradeReference.h	131	1630	Containers::Reference, a lightweight alternative to std::reference_wrapper
CorradeScopeGuard.h	263	1706	Containers::ScopeGuard, a lightweight alternative to std::unique_ptr with a custom deleter
CorradeString.hpp	2515[2]	2192	Containers::String and Containers::StringView, lightweight and optimized string (view) classes. Depends on CorradeEnumSet.h, the implementation depends on CorradePair.h and CorradeCpu.hpp.
CorradeTriple.h	464	1762	Containers::Triple, a lightweight alternative to a three-component std::tuple
CorradeCpu.hpp	1716	1995	Cpu library, compile-time and runtime CPU feature detection and dispatch
CorradeStlForwardArray.h	88	97[3]	Corrade's forward declaration for std::array, a lightweight alternative to the full <array> (15k PpLOC[1]) where supported
CorradeStlForwardString.h	89	68	Corrade's forward declaration for std::string, a lightweight alternative to the full <string> (11k PpLOC[1]) where supported
CorradeStlForwardTuple.h	102	2228	Corrade's forward declaration for std::tuple, a lightweight alternative to the full <tuple> (13k PpLOC[1]) where supported
CorradeStlForwardVector.h	77	498[3]	Corrade's forward declaration for std::vector, a lightweight alternative to the full <vector> (9k PpLOC[1]) where supported
CorradeStlMath.h	73	3222[4]	Corrade's optimized <cmath>, without the heavy C++17 additions (which is otherwise 11k PpLOC[4])
MagnumMath.hpp	7950	10096	Math namespace, a full-featured graphics-oriented linear algebra library

^[1] — lines of code after a preprocessor run, with system includes expanded. Gathered using GCC 13.2 and libstdc++, unless said otherwise.

^[2] — not a total size due to inter-library dependencies

^[3] — gathered using Clang 16.0 and libc++, since libstdc++ doesn't have a forward declaration for std::array / std::vector

^[4] — gathered using GCC 13.2, libstdc++ and -std=c++17

Where is the documentation?

Single-header libraries provided here are generated from multi-file sources in the Magnum project. This is done for two reasons — first, documentation and test coverage is much easier to maintain in the setting of a bigger project, avoiding any redundancy or duplicated efforts. Second, because the resulting files are generated with non-essential parts stripped away, there's no need to worry about bloating them due to original implementations having extensive documentation or rarely used features.

With the goal being easy integration, the files are deliberately free of all comments and documentation blocks to keep their size small. Documentation for each library is provided in the official Magnum documentation, linked from the table above. Each library file contains the same documentation link, together with a concrete Git revision it was generated from and a changelog for a few versions back for easier overview when updating.

For more information read the single-header library docs. The libraries are generated using acme.py, which is a part of Corrade. See its documentation, if you are interested. Particular libraries are introduced on the Magnum blog:

• Lightweight but still STL-compatible unique pointer (Jan 16, 2019)
• Array view implementations in Magnum (Feb 18, 2019)
• Forward-declaring STL container types (Mar 28, 2019)
• Multi-dimensional strided array views in Magnum (Apr 30, 2019)
• Convenient CPU feature detection and dispatch (Aug 2, 2022)

What about test coverage?

Testing done in this repository is mainly to ensure the libraries are generated correctly. Extensive testing on variety of compilers and OSes with > 99% test coverage is done in the Magnum Project itself. See the Build Status page for more information.

Reporting bugs and contributing

As always, bug reports, feature requests and code contributions are very welcome. However again please note the files in this repository are generated from original sources in the corrade and magnum repositories, meaning that ideally all PRs should go there instead, as there's a better infrastructure for documentation and testing. We don't enforce this rule though — if you have an important bugfix, it's better if you submit it here than not at all 😉

SUPPORTED PLATFORMS

All libraries are tested on these platforms:

• Linux and embedded Linux
• Windows, Windows RT (Store/Phone)
• macOS, iOS
• Android
• Web (asm.js or WebAssembly), through Emscripten

And on these compilers:

• GCC 4.8.1 and newer (and equivalent MinGW-w64 version)
• Clang 6.0 and newer (or AppleClang 10.0 and newer), both libstdc++ and libc++
• MSVC 2015 and newer

CONTACT & SUPPORT

• Project homepage — https://magnum.graphics/
• Documentation — https://doc.magnum.graphics/
• GitHub — https://github.com/mosra/magnum-singles and the #magnum topic
• GitLab — https://gitlab.com/mosra/magnum-singles
• Gitter community chat — https://gitter.im/mosra/magnum
• E-mail — info@magnum.graphics
• Google Groups mailing list — magnum-engine@googlegroups.com (archive)
• Twitter — https://twitter.com/czmosra and the #MagnumEngine hashtag

See also the Magnum Project Contact & Support page for further information.

Credits

Libraries presented here are a result of a dedicated work by many community members. List of all contributors to the Magnum Project can be found in the documentation.

License

Magnum is licensed under the MIT/Expat license, see the COPYING file for details.