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_set>
10
11// unordered_set& operator=(unordered_set&& c)
12// noexcept(
13// allocator_type::propagate_on_container_move_assignment::value &&
14// is_nothrow_move_assignable<allocator_type>::value &&
15// is_nothrow_move_assignable<key_compare>::value);
16
17// This tests a conforming extension
18
19// UNSUPPORTED: c++03
20
21#include <unordered_set>
22#include <cassert>
23
24#include "test_macros.h"
25#include "MoveOnly.h"
26#include "test_allocator.h"
27
28template <class T>
29struct some_comp
30{
31 typedef T value_type;
32 some_comp& operator=(const some_comp&);
33 bool operator()(const T&, const T&) const { return false; }
34};
35
36template <class T>
37struct some_hash
38{
39 typedef T value_type;
40 some_hash();
41 some_hash(const some_hash&);
42 some_hash& operator=(const some_hash&);
43 std::size_t operator()(T const&) const;
44};
45
46int main(int, char**)
47{
48 {
49 typedef std::unordered_set<MoveOnly> C;
50 static_assert(std::is_nothrow_move_assignable<C>::value, "");
51 }
52 {
53 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
54 std::equal_to<MoveOnly>, test_allocator<MoveOnly>> C;
55 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
56 }
57#if defined(_LIBCPP_VERSION)
58 {
59 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
60 std::equal_to<MoveOnly>, other_allocator<MoveOnly>> C;
61 static_assert(std::is_nothrow_move_assignable<C>::value, "");
62 }
63#endif // _LIBCPP_VERSION
64 {
65 typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>> C;
66 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
67 }
68 {
69 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
70 some_comp<MoveOnly>> C;
71 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
72 }
73
74 return 0;
75}
76

source code of libcxx/test/std/containers/unord/unord.set/unord.set.cnstr/move_assign_noexcept.pass.cpp