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52066eae | 1 | // { dg-do run { target c++11 } } |
66b432fd | 2 | // |
99dee823 | 3 | // Copyright (C) 2012-2021 Free Software Foundation, Inc. |
66b432fd FD |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | // | |
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <unordered_set> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | struct num | |
24 | { | |
25 | int value; | |
26 | num(int n) : value(n) {} | |
27 | num(num const&) = default; | |
28 | num& operator=(num const&) = default; | |
29 | num(num&& o) : value(o.value) | |
30 | { o.value = -1; } | |
31 | num& operator=(num&& o) | |
32 | { | |
33 | if (this != &o) | |
34 | { | |
35 | value = o.value; | |
36 | o.value = -1; | |
37 | } | |
38 | return *this; | |
39 | } | |
40 | }; | |
41 | ||
42 | struct num_hash | |
43 | { | |
44 | size_t operator()(num const& a) const | |
45 | { return a.value; } | |
46 | }; | |
47 | ||
48 | struct num_equal | |
49 | { | |
50 | static bool _S_called_on_moved_instance; | |
51 | bool operator()(num const& a, num const& b) const | |
52 | { | |
53 | if (a.value == -1 || b.value == -1) | |
54 | _S_called_on_moved_instance = true; | |
55 | return a.value == b.value; | |
56 | } | |
57 | }; | |
58 | ||
59 | bool num_equal::_S_called_on_moved_instance = false; | |
60 | ||
61 | // libstdc++/51866 | |
62 | void test01() | |
63 | { | |
66b432fd FD |
64 | std::unordered_multiset<num, num_hash, num_equal> mset; |
65 | mset.insert(num(1)); | |
66 | mset.insert(num(2)); | |
67 | mset.insert(num(1)); | |
68 | mset.insert(num(2)); | |
69 | VERIFY( mset.size() == 4 ); | |
70 | auto iter = mset.cbegin(); | |
71 | int x0 = (iter++)->value; | |
72 | int x1 = (iter++)->value; | |
73 | int x2 = (iter++)->value; | |
74 | int x3 = (iter++)->value; | |
75 | VERIFY( iter == mset.cend() ); | |
76 | VERIFY( (x0 == 1 && x1 == 1 && x2 == 2 && x3 == 2) | |
77 | || (x0 == 2 && x1 == 2 && x2 == 1 && x3 == 1) ); | |
78 | VERIFY( !num_equal::_S_called_on_moved_instance ); | |
79 | } | |
80 | ||
81 | int main() | |
82 | { | |
83 | test01(); | |
84 | return 0; | |
85 | } |