libstdc++-v3/testsuite/23_containers/deque/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 <deque>
  19 #include <testsuite_hooks.h>
  20
  21 struct T { int i; };
  22
  23 int swap_calls;
  24
  25 namespace std
  26 {
  27   template<>
  28     void
  29     deque<T, allocator<T> >::swap(deque<T, allocator<T> >&)
  30     { ++swap_calls; }
  31 }
  32
  33 // Should use deque specialization for swap.
  34 void test01()
  35 {
  36   std::deque<T> A;
  37   std::deque<T> B;
  38   swap_calls = 0;
  39   std::swap(A, B);
  40   VERIFY(1 == swap_calls);
  41 }
  42
  43 // Should use deque specialization for swap.
  44 void test02()
  45 {
  46   using namespace std;
  47   deque<T> A;
  48   deque<T> B;
  49   swap_calls = 0;
  50   swap(A, B);
  51   VERIFY(1 == swap_calls);
  52 }
  53
  54 // See c++/13658 for background info.
  55 int main()
  56 {
  57   test01();
  58   test02();
  59   return 0;
  60 }