What is the status of the monadic operations for std::expected? It seems like they made it into the standard for C++23, but they don't actually seem to be available in the std::expected implementation (in MSVC's STL)

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  • STL

    MSVC's implementation of the C++ Standard Library.

  • They'll be in VS2022 17.6 Preview 3. Source: https://github.com/microsoft/STL/wiki/Changelog

  • papers

    ISO/IEC JTC1 SC22 WG21 paper scheduling and management (by cplusplus)

  • Regardless, I am so glad that the monadic functions actually made it into the standard for this year and that we can expect to see them in the MSVC STL soon. Would have been unfortunate to have to wait until C++26, and it appears that that was very nearly the case: https://github.com/cplusplus/papers/issues/1161

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  • expected

    C++11/14/17 std::expected with functional-style extensions

  • In the meantime, I may use the TartanLlama implementation (here) and plan around replacing it with the real deal in the near future.

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