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 // <unordered_map>
10
11 // unordered_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 <unordered_map>
22 #include <cassert>
23
24 #include "test_macros.h"
25 #include "MoveOnly.h"
26 #include "test_allocator.h"
27 #include "../../../test_hash.h"
28
29 template <class T>
30 struct some_comp
31 {
32 typedef T value_type;
33 some_comp();
34 some_comp(const some_comp&);
operator ()some_comp35 bool operator()(const T&, const T&) const { return false; }
36 };
37
38 template <class T>
39 struct some_hash
40 {
41 typedef T value_type;
42 some_hash();
43 some_hash(const some_hash&);
44
45 std::size_t operator()(T const&) const;
46 };
47
main(int,char **)48 int main(int, char**)
49 {
50 #if defined(_LIBCPP_VERSION)
51 {
52 typedef std::unordered_map<MoveOnly, MoveOnly> C;
53 static_assert(std::is_nothrow_default_constructible<C>::value, "");
54 }
55 {
56 typedef std::unordered_map<MoveOnly, MoveOnly, std::hash<MoveOnly>,
57 std::equal_to<MoveOnly>, test_allocator<std::pair<const MoveOnly, MoveOnly>>> C;
58 static_assert(std::is_nothrow_default_constructible<C>::value, "");
59 }
60 #endif // _LIBCPP_VERSION
61 {
62 typedef std::unordered_map<MoveOnly, MoveOnly, std::hash<MoveOnly>,
63 std::equal_to<MoveOnly>, other_allocator<std::pair<const MoveOnly, MoveOnly>>> C;
64 static_assert(!std::is_nothrow_default_constructible<C>::value, "");
65 }
66 {
67 typedef std::unordered_map<MoveOnly, MoveOnly, some_hash<MoveOnly>> C;
68 static_assert(!std::is_nothrow_default_constructible<C>::value, "");
69 }
70 {
71 typedef std::unordered_map<MoveOnly, MoveOnly, std::hash<MoveOnly>,
72 some_comp<MoveOnly>> C;
73 static_assert(!std::is_nothrow_default_constructible<C>::value, "");
74 }
75
76 return 0;
77 }
78