Rapid YAML - a library to parse and emit YAML, and do it fast

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Rapid YAML

MIT Licensed release PyPI Docs Gitter

test Coveralls Codecov Total alerts Language grade: C/C++

Or ryml, for short. ryml is a library to parse and emit YAML, and do it fast.

ryml parses both read-only and in-situ source buffers; the resulting data nodes hold only views to sub-ranges of the source buffer. No string copies or duplications are done, and no virtual functions are used. The data tree is a flat index-based structure stored in a single array. Serialization happens only at your direct request, after parsing / before emitting. Internally the data tree representation has no knowledge of types (but of course, every node can have a YAML type tag). It is easy and fast to read, write and iterate through the data tree.

ryml can use custom global and per-tree memory allocators, and is exception-agnostic. Errors are reported via a custom error handler callback. A default error handler implementation using std::abort() is provided, but you can opt out, or provide your exception-throwing callback.

ryml has respect for your compilation times and therefore it is NOT header-only. It uses standard cmake build files, so it is easy to compile and install.

ryml has no dependencies, not even on the STL (although it does use the libc). It provides optional headers that let you serialize/deserialize STL strings and containers (or show you how to do it).

ryml is written in C++11, and is known to compile with:

  • Visual Studio 2015 and later
  • clang++ 3.9 and later
  • g++ 5 and later

ryml is extensively unit-tested in Linux, Windows and MacOS. The tests run in the standard x64, x86 and arm architectures, and include analysing ryml with:

  • valgrind
  • clang-tidy
  • clang sanitizers:
    • memory
    • address
    • undefined behavior
    • thread
  • LGTM.com

ryml is also available in Python, with more languages to follow (see below).

See also the changelog and the roadmap.

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