libstdc++-v3/testsuite/23_containers/multiset/modifiers/swap/1.cc

   1 // Copyright (C) 2004-2019 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 <set>
  19 #include <testsuite_hooks.h>
  20
  21 struct T { int i; };
  22
  23 // T must be LessThanComparable to pass concept-checks
  24 bool operator<(T l, T r) { return l.i < r.i; }
  25
  26 int swap_calls;
  27
  28 namespace std
  29 {
  30   template<>
  31     void
  32     multiset<T>::swap(multiset<T>&)
  33     { ++swap_calls; }
  34 }
  35
  36 // Should use multiset specialization for swap.
  37 void test01()
  38 {
  39   std::multiset<T> A;
  40   std::multiset<T> B;
  41   swap_calls = 0;
  42   std::swap(A, B);
  43   VERIFY(1 == swap_calls);
  44 }
  45
  46 // Should use multiset specialization for swap.
  47 void test02()
  48 {
  49   using namespace std;
  50   multiset<T> A;
  51   multiset<T> B;
  52   swap_calls = 0;
  53   swap(A, B);
  54   VERIFY(1 == swap_calls);
  55 }
  56
  57 // See c++/13658 for background info.
  58 int main()
  59 {
  60   test01();
  61   test02();
  62   return 0;
  63 }