xstd is an extremely portable (x64, ARM64, WASM32) and header-only library extending the C++20 STL with useful features. It is mainly extracted from VTIL-Common in an attempt to hopefully completely move it at some point.

Add the includes/ directory to your include path, or consume the CMake target:

add_subdirectory(xstd)               # or FetchContent
target_link_libraries(app PRIVATE xstd::xstd)

Requires a C++20 compiler. xstd/gzip.hpp and xstd/zstd.hpp additionally require zlib and libzstd.

• Formatting is enforced by .clang-format (clang-format >= 19); vendored files are excluded via .clang-format-ignore.
• cmake -B build -DXSTD_BUILD_CHECKS=ON && cmake --build build compiles every public header in a single TU — the same check CI runs on Linux (GCC, Clang) and macOS.

BSD-3-Clause, see LICENSE.