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1 | // { dg-options "-std=gnu++2a" } |
2 | // { dg-do run { target c++2a } } | |
3 | ||
83ffe9cd | 4 | // Copyright (C) 2020-2023 Free Software Foundation, Inc. |
e06cde87 VV |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | // | |
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | // | |
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <unordered_set> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | struct aggressive_aggregate | |
25 | { | |
26 | int a; | |
27 | int b; | |
28 | }; | |
29 | ||
30 | bool operator==(const aggressive_aggregate& a, | |
31 | const aggressive_aggregate& b) | |
32 | { | |
33 | return a.a == b.a; | |
34 | }; | |
35 | ||
36 | namespace std { | |
37 | template<> struct hash<aggressive_aggregate> { | |
38 | size_t operator()(const aggressive_aggregate& x) const { | |
39 | return std::hash<int>()(x.a); | |
40 | } | |
41 | }; | |
42 | } | |
43 | ||
44 | void test_emplace() | |
45 | { | |
46 | std::unordered_multiset<aggressive_aggregate> x; | |
47 | auto it = x.emplace(1, 2); | |
48 | VERIFY(it->a == 1); | |
49 | VERIFY(it->b == 2); | |
50 | it = x.emplace(2); | |
51 | VERIFY(it->a == 2); | |
52 | VERIFY(it->b == 0); | |
53 | it = x.emplace(); | |
54 | VERIFY(it->a == 0); | |
55 | VERIFY(it->b == 0); | |
56 | } | |
57 | ||
58 | void test_emplace_hint() | |
59 | { | |
60 | std::unordered_multiset<aggressive_aggregate> x; | |
61 | auto it = x.emplace_hint(x.begin(), | |
62 | 3, 2); | |
63 | VERIFY(it->a == 3); | |
64 | VERIFY(it->b == 2); | |
65 | it = x.emplace_hint(x.begin(), | |
66 | 4); | |
67 | VERIFY(it->a == 4); | |
68 | VERIFY(it->b == 0); | |
69 | it = x.emplace_hint(x.begin()); | |
70 | VERIFY(it->a == 0); | |
71 | VERIFY(it->b == 0); | |
72 | } | |
73 | ||
74 | int main() | |
75 | { | |
76 | test_emplace(); | |
77 | test_emplace_hint(); | |
78 | } |