libstdc++-v3/testsuite/23_containers/map/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 <map>
  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 struct U { };
  31
  32 namespace __gnu_test
  33 {
  34   inline void
  35   swap(propagating_allocator<std::pair<const T, U>, true>& l,
  36        propagating_allocator<std::pair<const T, U>, true>& r)
  37   noexcept(false)
  38   {
  39     typedef uneq_allocator<std::pair<const T, U>> base_alloc;
  40     swap(static_cast<base_alloc&>(l), static_cast<base_alloc&>(r));
  41   }
  42 }
  43
  44 using __gnu_test::propagating_allocator;
  45
  46 void test01()
  47 {
  48   typedef std::allocator<std::pair<const T, U>> alloc_type;
  49   typedef std::map<T, U, Cmp, alloc_type> test_type;
  50   test_type v1;
  51   test_type v2;
  52   // this is a GNU extension for std::allocator
  53   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  54   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  55 }
  56
  57 void test02()
  58 {
  59   typedef propagating_allocator<std::pair<const T, U>, false> alloc_type;
  60   typedef std::map<T, U, Cmp, alloc_type> test_type;
  61   test_type v1(alloc_type(1));
  62   test_type v2(alloc_type(2));
  63   static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  64   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  65 }
  66
  67 void test03()
  68 {
  69   typedef propagating_allocator<std::pair<const T, U>, true> alloc_type;
  70   typedef std::map<T, U, Cmp, alloc_type> test_type;
  71   test_type v1(alloc_type(1));
  72   test_type v2(alloc_type(2));
  73   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  74   static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
  75 }
  76
  77 int main()
  78 {
  79   test01();
  80   test02();
  81   test03();
  82   return 0;
  83 }