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

   1 // Copyright (C) 2013-2014 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-do compile }
  19 // { dg-options "-std=c++11" }
  20
  21 #include <unordered_map>
  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   template<typename U>
  41     inline void
  42     swap(propagating_allocator<U, true>& l, propagating_allocator<U, true>& r)
  43     noexcept(false)
  44     { }
  45 }
  46
  47 using __gnu_test::propagating_allocator;
  48
  49 void test01()
  50 {
  51   typedef std::allocator<T> alloc_type;
  52   typedef std::unordered_map<T, T, hash, equal_to, alloc_type> test_type;
  53   test_type v1;
  54   test_type v2;
  55   // this is a GNU extension for std::allocator
  56   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  57   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  58 }
  59
  60 void test02()
  61 {
  62   typedef propagating_allocator<T, false> alloc_type;
  63   typedef std::unordered_map<T, T, hash, equal_to, alloc_type> test_type;
  64   test_type v1(alloc_type(1));
  65   test_type v2(alloc_type(2));
  66   static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  67   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  68 }
  69
  70 void test03()
  71 {
  72   typedef propagating_allocator<T, true> alloc_type;
  73   typedef std::unordered_map<T, T, hash, equal_to, alloc_type> test_type;
  74   test_type v1(alloc_type(1));
  75   test_type v2(alloc_type(2));
  76   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  77   static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
  78 }