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

   1 // Copyright (C) 2013-2015 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=gnu++11" }
  20
  21 #include <unordered_set>
  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 // Versions of the function objects without nothrow swap.
  39 struct hash_t : hash { };
  40 void swap(hash_t&, hash_t&) noexcept(false) { }
  41 struct equal_to_t : equal_to { };
  42 void swap(equal_to_t&, equal_to_t&) noexcept(false) { }
  43
  44 using __gnu_test::propagating_allocator;
  45
  46 void test01()
  47 {
  48   typedef std::allocator<T> alloc_type;
  49   typedef std::unordered_set<T, hash, equal_to, 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 std::allocator<T> alloc_type;
  60   typedef std::unordered_set<T, hash_t, equal_to, alloc_type> test_type;
  61   test_type v1;
  62   test_type v2;
  63   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  64   static_assert( !noexcept( v1.swap(v2) ), "Swap can throw" );
  65 }
  66
  67 void test03()
  68 {
  69   typedef std::allocator<T> alloc_type;
  70   typedef std::unordered_set<T, hash, equal_to_t, alloc_type> test_type;
  71   test_type v1;
  72   test_type v2;
  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 void test04()
  78 {
  79   typedef propagating_allocator<T, false> alloc_type;
  80   typedef std::unordered_set<T, hash, equal_to, alloc_type> test_type;
  81   test_type v1(alloc_type(1));
  82   test_type v2(alloc_type(2));
  83   static_assert( !noexcept( v1 = std::move(v2) ), "Move assign can throw" );
  84   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  85 }
  86
  87 void test05()
  88 {
  89   typedef propagating_allocator<T, true> alloc_type;
  90   typedef std::unordered_set<T, hash, equal_to, alloc_type> test_type;
  91   test_type v1(alloc_type(1));
  92   test_type v2(alloc_type(2));
  93   static_assert( noexcept( v1 = std::move(v2) ), "Move assign cannot throw" );
  94   static_assert( noexcept( v1.swap(v2) ), "Swap cannot throw" );
  95 }
  96
  97 void test06()
  98 {
  99   typedef std::unordered_set<int> test_type;
 100   static_assert( noexcept( test_type() ), "Default constructor does not throw" );
 101   static_assert( noexcept( test_type(test_type()) ), "Move constructor does not throw" );
 102 }