Mark de Wever e5d2d3eafb [libc++][chrono] Implements formatter day.
This implements the enabled specializaton
template<class charT> struct formatter<chrono::day, charT>;

and
template<class charT, class traits>
    basic_ostream<charT, traits>&
      operator<<(basic_ostream<charT, traits>& os, const day& d);

Implements:
- LWG 3241 chrono-spec grammar ambiguity in §[time.format]

Partially implements:
- P1361 Integration of chrono with text formatting

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D128577
2022-09-07 18:44:04 +02:00
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