[libcxx-commits] [PATCH] D118457: [libc++][pstl][NFC] Remove usage of std::result_of from Parallel STL

[Ruslan Arutyunyan via Phabricator via libcxx-commits]

rarutyun created this revision.
rarutyun added reviewers: ldionne, Quuxplusone, MikeDvorskiy.
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`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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118457

Files:
  pstl/include/pstl/internal/utils.h


Index: pstl/include/pstl/internal/utils.h
===================================================================
--- pstl/include/pstl/internal/utils.h
+++ pstl/include/pstl/internal/utils.h
@@ -21,8 +21,8 @@
 {
 
 template <typename _Fp>
-typename std::result_of<_Fp()>::type
-__except_handler(_Fp __f)
+auto
+__except_handler(_Fp __f) -> decltype(__f())
 {
     try
     {


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