libstdc++-v3/testsuite/24_iterators/move_iterator/cust.cc

   1 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++20 } }
  19
  20 #include <iterator>
  21 #include <testsuite_hooks.h>
  22
  23 void
  24 test01()
  25 {
  26   struct X
  27   {
  28     X(int i) : i(i) { }
  29     X(X&& x) : i(x.i) { x.i = -1; }
  30     X& operator=(X&& x) { i = x.i; x.i = 0; return *this; }
  31     int i;
  32   };
  33
  34   X arr[] = { 1, 2 };
  35   std::move_iterator<X*> i(arr), j(arr + 1);
  36   std::ranges::iter_swap(i, j);
  37   VERIFY( arr[0].i == 2 );
  38   VERIFY( arr[1].i == 1 );
  39
  40   X x = std::ranges::iter_move(i);
  41   VERIFY( arr[0].i == -1 );
  42   VERIFY( x.i == 2 );
  43 }
  44
  45 int
  46 main()
  47 {
  48   test01();
  49 }