llvm/llvm-project

[Clang] Explain satisfaction failure for more type traits

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#141.911 aperta il 29 mag 2025

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clang:diagnosticsclang:frontendgood first issue

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Last week, we added the scaffolding for clang to explain why a standard type trait is not satisfied - when used either in a static_assert or as atomic constraint, in Sema::DiagnoseTypeTraitDetails (#141238)

https://gcc.godbolt.org/z/xb7PcxzTx

So far, this has only been done for std::is_trivially_relocatable.

There are plenty of type traits that could benefit from additional diagnostics https://eel.is/c++draft/type.traits#meta.type.synop

I figure adding support for more type traits (one at a time!) could be a good first issue, and it's always nice to improve our diagnostics.

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