test/std/containers/unord/unord.multiset/unord.multiset.cnstr/default_noexcept.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // <unordered_set>
  11
  12 // unordered_multiset()
  13 //    noexcept(
  14 //        is_nothrow_default_constructible<allocator_type>::value &&
  15 //        is_nothrow_default_constructible<key_compare>::value &&
  16 //        is_nothrow_copy_constructible<key_compare>::value);
  17
  18 // This tests a conforming extension
  19
  20 // UNSUPPORTED: c++98, c++03
  21
  22 #include <unordered_set>
  23 #include <cassert>
  24
  25 #include "test_macros.h"
  26 #include "MoveOnly.h"
  27 #include "test_allocator.h"
  28 #include "../../../test_hash.h"
  29
  30 template <class T>
  31 struct some_comp
  32 {
  33     typedef T value_type;
  34     some_comp();
  35     some_comp(const some_comp&);
  36     bool operator()(const T&, const T&) const { return false; }
  37 };
  38
  39 template <class T>
  40 struct some_hash
  41 {
  42     typedef T value_type;
  43     some_hash();
  44     some_hash(const some_hash&);
  45     std::size_t operator()(T const&) const;
  46 };
  47
  48 int main()
  49 {
  50 #if defined(_LIBCPP_VERSION)
  51     {
  52         typedef std::unordered_multiset<MoveOnly> C;
  53         static_assert(std::is_nothrow_default_constructible<C>::value, "");
  54     }
  55     {
  56         typedef std::unordered_multiset<MoveOnly, std::hash<MoveOnly>,
  57                            std::equal_to<MoveOnly>, test_allocator<MoveOnly>> C;
  58         static_assert(std::is_nothrow_default_constructible<C>::value, "");
  59     }
  60 #endif // _LIBCPP_VERSION
  61     {
  62         typedef std::unordered_multiset<MoveOnly, std::hash<MoveOnly>,
  63                           std::equal_to<MoveOnly>, other_allocator<MoveOnly>> C;
  64         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
  65     }
  66     {
  67         typedef std::unordered_multiset<MoveOnly, some_hash<MoveOnly>> C;
  68         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
  69     }
  70     {
  71         typedef std::unordered_multiset<MoveOnly, std::hash<MoveOnly>,
  72                                                          some_comp<MoveOnly>> C;
  73         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
  74     }
  75 }