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

   1 // { dg-do compile { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2011-2022 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // libstdc++/60594
  22
  23 #include <functional>
  24 #include <type_traits>
  25 struct bar;
  26 using F = std::function<bar()>;
  27 // check for copy constructible and assignable while 'bar' is incomplete
  28 constexpr int c = std::is_copy_constructible<F>::value;
  29 constexpr int a = std::is_copy_assignable<F>::value;
  30 struct bar { };
  31 bar func();
  32 void test()
  33 {
  34   F g{ &func };
  35   g = func;
  36 }