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

   1 // Copyright (C) 2004-2025 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 #if __cplusplus >= 201103L
  22 # define NOTHROW noexcept
  23 #else
  24 # define NOTHROW
  25 #endif
  26
  27 struct T { int i; };
  28
  29 int swap_calls;
  30
  31 namespace std
  32 {
  33   template<>
  34     void
  35     deque<T, allocator<T> >::swap(deque<T, allocator<T> >&) NOTHROW
  36     { ++swap_calls; }
  37 }
  38
  39 // Should use deque specialization for swap.
  40 void test01()
  41 {
  42   std::deque<T> A;
  43   std::deque<T> B;
  44   swap_calls = 0;
  45   std::swap(A, B);
  46   VERIFY(1 == swap_calls);
  47 }
  48
  49 // Should use deque specialization for swap.
  50 void test02()
  51 {
  52   using namespace std;
  53   deque<T> A;
  54   deque<T> B;
  55   swap_calls = 0;
  56   swap(A, B);
  57   VERIFY(1 == swap_calls);
  58 }
  59
  60 // See c++/13658 for background info.
  61 int main()
  62 {
  63   test01();
  64   test02();
  65   return 0;
  66 }