commit f5dc8171ad2c81e0a61d7250be5b4a0c045fbe21
author zoecarver <z.zoelec2@gmail.com> Tue May 12 18:56:18 2020 -0700
committer zoecarver <z.zoelec2@gmail.com> Tue May 12 18:57:50 2020 -0700
tree 3dc2c5dc18cf79bac3f9bc50c3595c92c38c857f
parent 876c696124ef255d2c3cfdb171a6a129f2ae7527

[libcxx] Constrain function assignment operator (2574).

This patch fixes LWG issue 2574.

Differential Review: https://reviews.llvm.org/D62928

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 8aa2266fd8dd237c84daf12c2eec0df244558f49

include/functional

diff --git a/include/functional b/include/functional
index fa55864..9d15485 100644
--- a/include/functional
+++ b/include/functional
@@ -2387,7 +2387,7 @@
     function& operator=(const function&);
     function& operator=(function&&) _NOEXCEPT;
     function& operator=(nullptr_t) _NOEXCEPT;
-    template<class _Fp, class = _EnableIfCallable<_Fp>>
+    template<class _Fp, class = _EnableIfCallable<typename decay<_Fp>::type>>
     function& operator=(_Fp&&);
 
     ~function();