Re: [boost] [config] First steps towards C++20 modules

ср, 10 июл. 2024 г. в 00:01, Antony Polukhin :

понедельник, 8 июля 2024 г. пользователь Ruben Perez написал: <...>

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I'm happy to hear your opinion.

My opinion is that I have not enough experience with modules yet :)

To fix that I'll try to modularise Boost.PFR in a few months. Many thanks for the links, especially with CMake scripts for modules

Here's my first attempt https://github.com/boostorg/pfr/pull/177/files I've only tested it on clang-15. Looks like the compiler has issues with mixing global module fragment and includes (just as was noted above), so I've ended up with a toy sample that uses only std::puts. And it works! The compilation time change is qute impressive: $ time clang++-15 -std=c++20 -I /data/code/boost/ example/motivating_example0.cpp real 0m2,051s user 0m1,844s sys 0m0,144s $ time clang++-15 -std=c++20 -fmodule-file=pfr.pcm pfr.pcm example/module_usage.cpp real 0m0,375s user 0m0,249s sys 0m0,107s No idea how to deal with dependencies between diffrent Boost libraries, so I'd probably try to modularise Boost.Core + Boost.TypeIndex to get the idea. -- Best regards, Antony Polukhin