libstdc++-v3/testsuite/25_algorithms/iter_swap/20577.cc

   1 // Copyright (C) 2005-2020 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 #include <algorithm>
  19 #include <vector>
  20 #include <testsuite_hooks.h>
  21
  22 void
  23 test1()
  24 {
  25   std::vector<bool> v;
  26   v.push_back(true);
  27   v.push_back(false);
  28   std::iter_swap(v.begin(), v.begin() + 1);
  29   VERIFY( v[0] == false && v[1] == true );
  30 }
  31
  32 void
  33 test2()
  34 {
  35   std::vector<int> v;
  36   v.push_back(1);
  37   v.push_back(2);
  38   std::iter_swap(v.begin(), v.begin() + 1);
  39   VERIFY( v[0] == 2 && v[1] == 1 );
  40 }
  41
  42 int int_swap_count;
  43
  44 struct X {};
  45 void swap(X&, X&)
  46 { ++int_swap_count; }
  47
  48 void
  49 test3()
  50 {
  51   int_swap_count = 0;
  52   X i, j;
  53   std::iter_swap(&i, &j);
  54   VERIFY( int_swap_count == 1 );
  55 }
  56
  57 // libstdc++/20577
  58 int main()
  59 {
  60   test1();
  61   test2();
  62   test3();
  63   return 0;
  64 }