[PATCH] D104975: Implement P1949

[JF Bastien via Phabricator via cfe-commits]

jfb added a comment.

It would be more user friendly to say which character is not allowed in the diagnostic.

Do we need to have a backwards compatible flag to preserve the old behavior, or do we believe that nobody will be affected by the change? We should make this choice explicitly and state it in the patch description.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D104975/new/

https://reviews.llvm.org/D104975