Corentin Jabot 49e0495feb [Clang] Produce a warning instead of an error in unevaluated strings before C++26 ...

Emiting an error on unexpected encoding prefix - which was allowed before C++26 -
caused build errors for a few users.
This downgrade the error to a warning on older language modes and C.

Reviewed By: aaron.ballman, hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D156596

2023-08-10 09:43:20 +02:00

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