[all-commits] [llvm/llvm-project] 484e64: [libc++] Use __is_convertible built-in when available

[Roland McGrath via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 484e64f7e7b2c0494d7b2dbfdd528bcd707ee652
      https://github.com/llvm/llvm-project/commit/484e64f7e7b2c0494d7b2dbfdd528bcd707ee652
  Author: Roland McGrath <mcgrathr at google.com>
  Date:   2023-04-27 (Thu, 27 Apr 2023)

  Changed paths:
    M libcxx/include/__type_traits/is_convertible.h

  Log Message:
  -----------
  [libc++] Use __is_convertible built-in when available

https://github.com/llvm/llvm-project/issues/62396 reports that
GCC 13 barfs on parsing <type_traits> because of the declarations
of `struct __is_convertible`.  In GCC 13, `__is_convertible` is a
built-in, but `__is_convertible_to` is not.  Clang has both, so
using either should be fine.

Reviewed By: #libc, philnik

Differential Revision: https://reviews.llvm.org/D149313