commit 9143c606ed35f9b93357ff4355ea59d80661f0d4
author Christopher Di Bella <cjdb.ns@gmail.com> Tue Mar 02 22:33:21 2021 +0000
committer Copybara-Service <copybara-worker@google.com> Thu Mar 18 00:22:21 2021 -0700
tree 96ab18a6e85ff15b41745fd2c9b8a0c2ee74d5d9
parent 8cc0b95c36454181769ae40c6c594abe44259786

[libcxx] adds common_reference to <type_traits>

Implements part of P0898R3 Standard Library Concepts

Reworks D74351 to use requires-clauses over SFINAE and so that it more
closely follows the wording.

Co-authored by: Michael Schellenberger Costa <mschellenbergercosta@googlemail.com>

(Michael did all the heavy lifting and I came in to polish it for
 submission, since Michael is focussing on `std::format` now.)

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D96657

GitOrigin-RevId: eadece333f6112502046fad0f2c062d13a37079b