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 // <map>
10 
11 // map()
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 <map>
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     typedef std::pair<const MoveOnly, MoveOnly> V;
39 #if defined(_LIBCPP_VERSION)
40     {
41         typedef std::map<MoveOnly, MoveOnly> C;
42         static_assert(std::is_nothrow_default_constructible<C>::value, "");
43     }
44     {
45         typedef std::map<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<V>> C;
46         static_assert(std::is_nothrow_default_constructible<C>::value, "");
47     }
48 #endif // _LIBCPP_VERSION
49     {
50         typedef std::map<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<V>> C;
51         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
52     }
53     {
54         typedef std::map<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
55         static_assert(!std::is_nothrow_default_constructible<C>::value, "");
56     }
57 
58   return 0;
59 }
60