libstdc++-v3/testsuite/20_util/function/cons/move.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2009-2018 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 #include <functional>
  21 #include <testsuite_hooks.h>
  22
  23 int f1() { return 1; }
  24 struct { int operator()() { return 2; } } f2;
  25
  26 void test01()
  27 {
  28   typedef std::function<int()> function;
  29
  30   function fo(f1);
  31   function fo1(std::move(fo));
  32   VERIFY( static_cast<bool>(fo1) );
  33   VERIFY( fo1() == 1 );
  34
  35   fo = function(f2);
  36   function fo2(std::move(fo));
  37   VERIFY( static_cast<bool>(fo2) );
  38   VERIFY( fo2() == 2 );
  39
  40   static_assert(std::is_nothrow_move_constructible<function>::value,
  41                 "PR libstdc++/81017");
  42 }
  43
  44 int main()
  45 {
  46   test01();
  47 }