tree e2bf7e6d645dc3aa0c45d0a12a81e5f5ee33672e
parent 696a6e906e055d3b3de7f2861ee0cc48c2f98e07
author Ruslan Arutyunyan <ruslan.arutyunyan@intel.com> 1643654416 +0300
committer Copybara-Service <copybara-worker@google.com> 1643657477 -0800

[libc++][pstl][NFC] Remove usage of std::result_of from Parallel STL

std::result_of creates problems when building with C++20 because it's
deprecated there.

The solution is to remove it and get return value type for a function
with decltype.

Substitute std::invoke_result for std::result_of is unnecessary because
we don't have std::invoke semantics within the function - we don't work
with pointer-to-member's.

Reviewed by: ldionne, MikeDvorskiy, #libc

Differential Revision: https://reviews.llvm.org/D118457

GitOrigin-RevId: d01d91d1aec9cca8dc7259009a6b3db0900e8623