[libcxx-commits] [libcxx] [libc++] Mark std::expected as nodiscard (PR #139651)

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halbi2 wrote:

@philnik777 oh, I missed that consensus, I saw the comments from @zmodem and @hulxv about LLVM and Rust and from @strega-nil-re and @StephanTLavavej about Microsoft C++. Now there is a way to disable the warning. @huixie90 what do you think, are you willing to "give it a try?"

https://github.com/llvm/llvm-project/pull/139651