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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2009-2024 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 #include <functional>
  22 #include <testsuite_hooks.h>
  23
  24 int f1() { return 1; }
  25 struct { int operator()() { return 2; } } f2;
  26
  27 void test01()
  28 {
  29   typedef std::function<int()> function;
  30
  31   function fo(f1);
  32   function fo1;
  33   fo1 = (std::move(fo));
  34   VERIFY( static_cast<bool>(fo1) );
  35   VERIFY( fo1() == 1 );
  36
  37   fo = function(f2);
  38   function fo2;
  39   fo2 = (std::move(fo));
  40   VERIFY( static_cast<bool>(fo2) );
  41   VERIFY( fo2() == 2 );
  42
  43   static_assert(std::is_nothrow_move_assignable<function>::value,
  44                 "PR libstdc++/81017");
  45 }
  46
  47 int main()
  48 {
  49   test01();
  50 }