libstdc++-v3/testsuite/23_containers/unordered_multimap/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=c++11" }
  19
  20 #include <unordered_map>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_allocator.h>
  23
  24 struct T { int i; };
  25
  26 struct hash
  27 {
  28   std::size_t operator()(const T t) const noexcept
  29   { return t.i; }
  30 };
  31
  32 struct equal_to
  33 {
  34   bool operator()(const T& lhs, const T& rhs) const noexcept
  35   { return lhs.i == rhs.i; }
  36 };
  37
  38 namespace __gnu_test
  39 {
  40   inline void
  41   swap(propagating_allocator<T, true>& l, propagating_allocator<T, true>& r)
  42   noexcept(false)
  43   {
  44     typedef uneq_allocator<T> base_alloc;
  45     swap(static_cast<base_alloc&>(l), static_cast<base_alloc&>(r));
  46   }
  47 }
  48
  49 using __gnu_test::propagating_allocator;
  50
  51 void test01()
  52 {
  53   typedef std::allocator<T> alloc_type;
  54   typedef std::unordered_multimap<T, T, hash, equal_to, alloc_type> test_type;
  55   test_type v1;
  56   test_type v2;
  57   // this is a GNU extension for std::allocator
  58   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  59   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  60 }
  61
  62 void test02()
  63 {
  64   typedef propagating_allocator<T, false> alloc_type;
  65   typedef std::unordered_multimap<T, T, hash, equal_to, alloc_type> test_type;
  66   test_type v1(alloc_type(1));
  67   test_type v2(alloc_type(2));
  68   static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  69   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  70 }
  71
  72 void test03()
  73 {
  74   typedef propagating_allocator<T, true> alloc_type;
  75   typedef std::unordered_multimap<T, T, hash, equal_to, alloc_type> test_type;
  76   test_type v1(alloc_type(1));
  77   test_type v2(alloc_type(2));
  78   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  79   // static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
  80 }
  81
  82 int main()
  83 {
  84   test01();
  85   test02();
  86   test03();
  87   return 0;
  88 }