[libcxx-commits] [libcxx] [libc++][cmath] Adding `[[nodicard]]` (PR #171763)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 requested changes to this pull request.

I'm not convinced we should extend the annotations in cmath for now. The current ones have been added to reflect what Clang diagnoses on its own and I'm hesitant to do anything more, since any functions not annotated currently have side-effects.

https://github.com/llvm/llvm-project/pull/171763