llvm-project

e476f968 - [libc++][Clang] Added explanation why is_constructible evaluated to false. Updated the diagnostics checks in libc++ tests. (#144220)

[libc++][Clang] Added explanation why is_constructible evaluated to false. Updated the diagnostics checks in libc++ tests. (#144220) Added explanation why a is constructible evaluated to false. Also fixed problem with ExtractTypeTraitFromExpression. In case std::is_xxx_v<> with variadic pack it tries to get template argument, but fails in expression Arg.getAsType() due to Arg.getKind() == TemplateArgument::ArgKind::Pack, but not TemplateArgument::ArgKind::Type. Reverts #144127 Fixies https://github.com/llvm/llvm-project/pull/143309#issuecomment-2970012054