[libcxx-commits] [libcxx] [libcxx] Allow string to use SSO in constant evaluation. (PR #66576)

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

In general I really like this patch. I understand that this could be a portability problem, but given that libstdc++ and the MSVC STL already allow this, I don't think that's something we introduce. Maybe we could add a warning for this case. I think that would address any portability concerns. @AaronBallman @cor3ntin @erichkeane do you have any idea if that would be feasible?

https://github.com/llvm/llvm-project/pull/66576