libcxx/test/std/containers/associative/multiset/multiset.cons/default_noexcept.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <set>
  10
  11 // multiset()
  12 //    noexcept(
  13 //        is_nothrow_default_constructible<allocator_type>::value &&
  14 //        is_nothrow_default_constructible<key_compare>::value &&
  15 //        is_nothrow_copy_constructible<key_compare>::value);
  16
  17 // This tests a conforming extension
  18
  19 // UNSUPPORTED: c++03
  20
  21 #include <set>
  22 #include <cassert>
  23
  24 #include "test_macros.h"
  25 #include "MoveOnly.h"
  26 #include "test_allocator.h"
  27
  28 template <class T>
  29 struct some_comp
  30 {
  31     typedef T value_type;
  32     some_comp();
  33     bool operator()(const T&, const T&) const { return false; }
  34 };
  35
  36 int main(int, char**)
  37 {
  38 #if defined(_LIBCPP_VERSION)
  39     {
  40         typedef std::multiset<MoveOnly> C;
  41         static_assert(std::is_nothrow_default_constructible<C>::value, "");
  42     }
  43     {
  44         typedef std::multiset<MoveOnly, std::less<MoveOnly>, test_allocator<MoveOnly>> C;
  45         static_assert(std::is_nothrow_default_constructible<C>::value, "");
  46     }
  47 #endif // _LIBCPP_VERSION
  48     {
  49         typedef std::multiset<MoveOnly, std::less<MoveOnly>, other_allocator<MoveOnly>> C;
  50         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
  51     }
  52     {
  53         typedef std::multiset<MoveOnly, some_comp<MoveOnly>> C;
  54         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
  55     }
  56
  57   return 0;
  58 }