cpplearner added a comment. In D133853#3808674 <https://reviews.llvm.org/D133853#3808674>, @aaron.ballman wrote:
> Now I'm wondering why the attribute exists at all. If it's functionally > equivalent to `constexpr` as a keyword, what are the use cases for the > attribute? It appears that `[[msvc::constexpr]]` does not make a function `constexpr`, but if `[[msvc::constexpr]]` is used in a function definition //and// in a call to that function, then the annotated function call can be evaluated during constant evaluation: https://godbolt.org/z/3MPTsz6Yn Apparently this is used to implement constexpr `std::construct_at`, which needs to call placement `operator new`, but the latter is not `constexpr`. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D133853/new/ https://reviews.llvm.org/D133853 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
