libstdc++-v3/testsuite/20_util/function/60594.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2011-2018 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // libstdc++/60594
  21
  22 #include <functional>
  23 #include <type_traits>
  24 struct bar;
  25 using F = std::function<bar()>;
  26 // check for copy constructible and assignable while 'bar' is incomplete
  27 constexpr int c = std::is_copy_constructible<F>::value;
  28 constexpr int a = std::is_copy_assignable<F>::value;
  29 struct bar { };
  30 bar func();
  31 void test()
  32 {
  33   F g{ &func };
  34   g = func;
  35 }