[libcxx] Constrain function assignment operator (2574).
authorzoecarver <z.zoelec2@gmail.com>
Wed, 13 May 2020 01:56:18 +0000 (18:56 -0700)
committerzoecarver <z.zoelec2@gmail.com>
Wed, 13 May 2020 01:57:50 +0000 (18:57 -0700)
commit8aa2266fd8dd237c84daf12c2eec0df244558f49
tree58592fae2eb6dda0e6b07119b4f8f13b7899d6bb
parent96282b1a0c47ae5001394f7959bb24924157e8ff
[libcxx] Constrain function assignment operator (2574).

This patch fixes LWG issue 2574.

Differential Review: https://reviews.llvm.org/D62928
libcxx/include/functional
libcxx/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.con/F_assign.pass.cpp
libcxx/www/cxx1z_status.html