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83ffe9cd | 1 | // Copyright (C) 2020-2023 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 | void | |
35 | test01() | |
36 | { | |
37 | for (unsigned size = 0; size < 50; ++size) | |
38 | { | |
39 | std::vector<int> vref(size); | |
40 | std::iota(vref.begin(), vref.end(), 0); | |
41 | std::vector<int> v1(vref), v2(vref); | |
42 | test_container<int, random_access_iterator_wrapper> c | |
10a32d47 | 43 | = {v1.data(), v1.data() + size}; |
bc464641 | 44 | test_range<int, random_access_iterator_wrapper> r |
10a32d47 | 45 | = {v2.data(), v2.data() + size}; |
bc464641 PP |
46 | |
47 | std::ranlux48_base g1(size), g2(size + 1); | |
48 | ranges::shuffle(c, g1); | |
49 | ranges::shuffle(ranges::begin(r), ranges::end(r), g2); | |
50 | ||
51 | for (unsigned middle = 0; middle < std::min(size, 10U); ++middle) | |
52 | { | |
53 | auto res1 = ranges::partial_sort(c.begin(), c.begin()+middle, c.end(), | |
54 | {}, std::negate<>{}); | |
55 | VERIFY( res1 == c.end() ); | |
56 | ||
57 | auto res2 = ranges::partial_sort(r, | |
58 | ranges::begin(r)+middle, | |
59 | ranges::greater{}); | |
60 | VERIFY( res2 == ranges::end(r) ); | |
61 | ||
62 | VERIFY( ranges::equal(c.begin(), c.begin()+middle, | |
63 | r.begin(), r.begin()+middle) ); | |
64 | VERIFY( ranges::equal(c.begin(), c.begin()+middle, | |
65 | vref.rbegin(), vref.rbegin()+middle) ); | |
66 | } | |
67 | } | |
68 | } | |
69 | ||
70 | constexpr bool | |
71 | test02() | |
72 | { | |
73 | int x[] = { 5,4,1,3,2 }; | |
74 | const int y[] = { 1,2,3 }; | |
75 | ranges::partial_sort(x, x+3, x+5); | |
76 | return ranges::equal(x, x+3, y, y+3); | |
77 | } | |
78 | ||
79 | int | |
80 | main() | |
81 | { | |
82 | test01(); | |
83 | static_assert(test02()); | |
84 | } |