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52066eae | 1 | // { dg-do run { target c++11 } } |
5b3be7cf | 2 | |
83ffe9cd | 3 | // Copyright (C) 2013-2023 Free Software Foundation, Inc. |
5b3be7cf 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 <testsuite_hooks.h> | |
21 | #include <unordered_set> | |
22 | ||
23 | namespace | |
24 | { | |
25 | struct hash | |
26 | { | |
27 | hash() = default; | |
28 | hash(int modulo) | |
29 | : _M_modulo(modulo) | |
30 | { } | |
31 | ||
32 | std::size_t operator() (int val) const noexcept | |
33 | { return val % _M_modulo; } | |
34 | ||
35 | int _M_modulo; | |
36 | }; | |
37 | } | |
38 | ||
39 | void | |
40 | test01() | |
41 | { | |
5b3be7cf FD |
42 | // static_assert(std::__cache_default<int, hash>::value, |
43 | // "Unexpected default cache value"); | |
44 | typedef std::unordered_set<int, hash> us_t; | |
45 | us_t us1(10, hash(13)); | |
46 | us_t us2(10, hash(7)); | |
47 | ||
48 | VERIFY( us1.hash_function()._M_modulo == 13 ); | |
49 | VERIFY( us2.hash_function()._M_modulo == 7 ); | |
50 | ||
51 | const int nb = 5; | |
52 | for (int i = 0; i != nb * us1.hash_function()._M_modulo; ++i) | |
53 | us1.insert(i); | |
54 | ||
55 | us_t::local_iterator lit = us1.begin(12); | |
56 | us_t::local_iterator litend = us1.end(12); | |
57 | VERIFY( std::distance(lit, litend) == nb ); | |
58 | ||
59 | us1.swap(us2); | |
60 | ||
61 | VERIFY( us1.hash_function()._M_modulo == 7 ); | |
62 | VERIFY( us2.hash_function()._M_modulo == 13 ); | |
63 | ||
64 | VERIFY( std::distance(lit, litend) == nb ); | |
65 | } | |
66 | ||
67 | int main() | |
68 | { | |
69 | test01(); | |
70 | } |