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7adcbafe | 1 | // Copyright (C) 2020-2022 Free Software Foundation, Inc. |
bc464641 PP |
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-options "-std=gnu++2a" } | |
19 | // { dg-do run { target c++2a } } | |
20 | // { dg-require-cstdint "" } | |
21 | ||
22 | #include <algorithm> | |
23 | #include <random> | |
24 | #include <vector> | |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_iterators.h> | |
27 | ||
28 | using __gnu_test::test_container; | |
29 | using __gnu_test::test_range; | |
30 | using __gnu_test::random_access_iterator_wrapper; | |
31 | ||
32 | namespace ranges = std::ranges; | |
33 | ||
34 | // This test doesn't verify the stability property of ranges::stable_sort, | |
35 | // because at the moment it's just defined to be a wrapper over | |
36 | // std::stable_sort. | |
37 | ||
38 | void | |
39 | test01() | |
40 | { | |
41 | for (unsigned size = 0; size < 50; ++size) | |
42 | { | |
43 | std::vector<int> vref(size); | |
44 | std::iota(vref.begin(), vref.end(), 0); | |
45 | std::vector<int> v1(vref), v2(vref); | |
46 | test_container<int, random_access_iterator_wrapper> c | |
10a32d47 | 47 | = {v1.data(), v1.data() + size}; |
bc464641 | 48 | test_range<int, random_access_iterator_wrapper> r |
10a32d47 | 49 | = {v2.data(), v2.data() + size}; |
bc464641 PP |
50 | |
51 | std::ranlux48_base g1(size), g2(size + 1); | |
52 | ranges::shuffle(c, g1); | |
53 | ranges::shuffle(ranges::begin(r), ranges::end(r), g2); | |
54 | ||
55 | auto res1 = ranges::stable_sort(c.begin(), c.end(), {}, std::negate<>{}); | |
56 | VERIFY( res1 == c.end() ); | |
57 | ||
58 | auto res2 = ranges::stable_sort(r, ranges::greater{}); | |
59 | VERIFY( res2 == ranges::end(r) ); | |
60 | ||
61 | VERIFY( ranges::equal(c, r) ); | |
62 | VERIFY( ranges::equal(c.begin(), c.end(), vref.rbegin(), vref.rend()) ); | |
63 | } | |
64 | } | |
65 | ||
66 | int | |
67 | main() | |
68 | { | |
69 | test01(); | |
70 | } |