libstdc++-v3/testsuite/23_containers/multiset/allocator/noexcept.cc

   1 // Copyright (C) 2013 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 // { dg-options "-std=gnu++11" }
  19
  20 #include <set>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_allocator.h>
  23
  24 struct T { int i; };
  25
  26 bool operator<(T l, T r) { return l.i < r.i; }
  27
  28 using Cmp = std::less<T>;
  29
  30 namespace __gnu_test
  31 {
  32   inline void
  33   swap(propagating_allocator<T, true>& l,
  34        propagating_allocator<T, true>& r)
  35   noexcept(false)
  36   {
  37     typedef uneq_allocator<T> base_alloc;
  38     swap(static_cast<base_alloc&>(l), static_cast<base_alloc&>(r));
  39   }
  40 }
  41
  42 using __gnu_test::propagating_allocator;
  43
  44 void test01()
  45 {
  46   typedef std::allocator<T> alloc_type;
  47   typedef std::multiset<T, Cmp, alloc_type> test_type;
  48   test_type v1;
  49   test_type v2;
  50   // this is a GNU extension for std::allocator
  51   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  52   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  53 }
  54
  55 void test02()
  56 {
  57   typedef propagating_allocator<T, false> alloc_type;
  58   typedef std::multiset<T, Cmp, alloc_type> test_type;
  59   test_type v1(alloc_type(1));
  60   test_type v2(alloc_type(2));
  61   static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  62   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  63 }
  64
  65 void test03()
  66 {
  67   typedef propagating_allocator<T, true> alloc_type;
  68   typedef std::multiset<T, Cmp, alloc_type> test_type;
  69   test_type v1(alloc_type(1));
  70   test_type v2(alloc_type(2));
  71   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  72   static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
  73 }
  74
  75 int main()
  76 {
  77   test01();
  78   test02();
  79   test03();
  80   return 0;
  81 }