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a945c346 | 1 | // Copyright (C) 2020-2024 Free Software Foundation, Inc. |
b9c84e95 FD |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // { dg-do run { target c++11 } } | |
19 | ||
20 | #include <unordered_set> | |
21 | ||
22 | #include <testsuite_allocator.h> | |
23 | #include <testsuite_hooks.h> | |
24 | ||
25 | int moves = 0; | |
26 | ||
27 | struct X | |
28 | { | |
29 | X() = default; | |
30 | X(const X&) = default; | |
31 | X(int i) : _i(i) {} | |
32 | ||
33 | // Move constructor might throw | |
34 | X(X&& x) noexcept(false) | |
35 | { | |
36 | this->_i = x._i; | |
37 | x._i = -1; | |
38 | ++moves; | |
39 | } | |
40 | ||
41 | int _i; | |
42 | }; | |
43 | ||
44 | struct XHasher | |
45 | { | |
46 | std::size_t | |
47 | operator()(const X& x) const noexcept | |
48 | { return x._i; } | |
49 | }; | |
50 | ||
51 | struct XEqualTo | |
52 | { | |
53 | bool | |
54 | operator()(const X& lhs, const X& rhs) const noexcept | |
55 | { return lhs._i == rhs._i; } | |
56 | }; | |
57 | ||
58 | void | |
59 | test01() | |
60 | { | |
61 | using A = __gnu_test::propagating_allocator<X, false>; | |
62 | A a1(1), a2(2); | |
63 | std::unordered_set<X, XHasher, XEqualTo, A> u1(a1), u2(a2); | |
64 | u1 = { X(0), X(1), X(2) }; | |
65 | u2 = { X(3), X(4), X(5) }; | |
66 | ||
67 | moves = 0; | |
68 | u1 = std::move(u2); | |
69 | ||
70 | VERIFY( moves == 3 ); | |
71 | VERIFY( u1.count(X(1)) == 0 ); | |
72 | VERIFY( u1.count(X(3)) == 1 ); | |
73 | } | |
74 | ||
75 | int | |
76 | main() | |
77 | { | |
78 | test01(); | |
79 | } |