[libcxx-commits] [PATCH] D93166: [libc++][format] Add basic_format_parse_context.

[Mark de Wever via Phabricator via libcxx-commits]

Mordante added a comment.

In D93166#2534776 <https://reviews.llvm.org/D93166#2534776>, @antiagainst wrote:

> Some additional information that might help: looks like `std:: is_constant_evaluated` is supported since Clang 9: https://clang.llvm.org/cxx_status.html

Thanks there's already a library macro to test whether it's available `_LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED`. But the we don't test with old compilers in C++20 mode.


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  https://reviews.llvm.org/D93166/new/

https://reviews.llvm.org/D93166