[Bug c/79459] Please add enable_if and diagnose_if attributes (from clang)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79459

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Severity|normal                      |enhancement