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For example, the [[maybe_unused]] and similar annotations in C++17 grew out of gcc builtins.

• saagarjha 8y ago
  Of course, C++ is much more aggressive in stealing popular features from the community, especially Boost.
  • bstamour 8y ago
    Boost came about from a few members of the ISO C++ committee as a way to iterate on library features. It would be a shame if none of that work made it's way back into the standard.
  • jcelerier 8y ago
    Boost was created as a place to beta-test future C++ features. Its whole point is to move stuff from boost:: to std::