[PATCH] D156247: [Clang] Add a warning on uses of coroutine keywords

[Corentin Jabot via Phabricator via cfe-commits]

cor3ntin added a comment.

We usually reserve these warnings for feature backported to older c++ standards, and I'm not sure "you are using a standard feature" is in general a useful warning.
however, if there are important unresolved issues, why did we set `__cpp_impl_coroutine` ?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D156247/new/

https://reviews.llvm.org/D156247