libstdc++-v3/testsuite/tr1/6_containers/utility/pair.cc

   1 // 2004-09-23 Chris Jefferson <chris@bubblescope.net>
   2
   3 // Copyright (C) 2004-2023 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 // { dg-options "-std=c++98" }
  21
  22 // tr1 additions to pair
  23
  24 #include <tr1/utility>
  25 #include <testsuite_hooks.h>
  26
  27 using namespace std::tr1;
  28 using std::pair;
  29
  30 struct blank_class
  31 { };
  32
  33 int
  34 main()
  35 {
  36   typedef pair<int,int> test_pair_type;
  37   VERIFY(tuple_size<test_pair_type>::value == 2);
  38   // Test if tuple_element::type returns the correct type
  39   blank_class blank;
  40   tuple_element<0, pair<blank_class, int> >::type
  41     blank2 __attribute__((unused)) = blank;
  42   tuple_element<1, pair<int ,blank_class> >::type
  43     blank3 __attribute__((unused)) = blank;
  44   pair<int,int> test_pair(1, 2);
  45   VERIFY(get<0>(test_pair) == 1);
  46   VERIFY(get<1>(test_pair) == 2);
  47   get<0>(test_pair) = 3;
  48   get<1>(test_pair) = 4;
  49   VERIFY(get<0>(test_pair) == 3);
  50   VERIFY(get<1>(test_pair) == 4);
  51
  52   const pair<int,int> test_pair2(1,2);
  53   VERIFY(get<0>(test_pair2) == 1);
  54   VERIFY(get<1>(test_pair2) == 2);
  55 }
  56