[PATCH] D150226: [Clang] Remove ability to downgrade warning on the diagnostic for setting a non fixed enum to a value outside the range of the enumeration values

[James Y Knight via Phabricator via cfe-commits]

jyknight added a comment.

When looking for errors in existing codebases, don't forget that this diagnostic is currently suppressed by default in system headers. So this patch is moving from "no diagnostics for code in system headers" to "unconditional hard error in system headers". Just removing `-Wno-enum-constexpr-conversion` from your build flags is insufficient to test that this patch won't break code!

I haven't done any tests, but I'm rather skeptical that this change is going to be viable without breaking stuff, still.


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  https://reviews.llvm.org/D150226/new/

https://reviews.llvm.org/D150226