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 // <map>
11 
12 // multimap()
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 #include <map>
21 #include <cassert>
22 
23 #include "MoveOnly.h"
24 #include "test_allocator.h"
25 
26 template <class T>
27 struct some_comp
28 {
29     typedef T value_type;
30     some_comp();
31     bool operator()(const T&, const T&) const { return false; }
32 };
33 
34 int main()
35 {
36 #if __has_feature(cxx_noexcept)
37     typedef std::pair<const MoveOnly, MoveOnly> V;
38     {
39         typedef std::multimap<MoveOnly, MoveOnly> C;
40         static_assert(std::is_nothrow_default_constructible<C>::value, "");
41     }
42     {
43         typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<V>> C;
44         static_assert(std::is_nothrow_default_constructible<C>::value, "");
45     }
46     {
47         typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<V>> C;
48         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
49     }
50     {
51         typedef std::multimap<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
52         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
53     }
54 #endif
55 }
56