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83ffe9cd | 1 | // Copyright (C) 2020-2023 Free Software Foundation, Inc. |
f3169941 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 <testsuite_hooks.h> | |
25 | #include <testsuite_iterators.h> | |
26 | ||
27 | using __gnu_test::test_range; | |
28 | using __gnu_test::forward_iterator_wrapper; | |
29 | using __gnu_test::input_iterator_wrapper; | |
30 | using __gnu_test::output_iterator_wrapper; | |
31 | using __gnu_test::random_access_iterator_wrapper; | |
32 | ||
33 | namespace ranges = std::ranges; | |
34 | ||
35 | std::mt19937 rng; | |
36 | ||
37 | template<template<typename> typename in_wrapper, | |
38 | template<typename> typename out_wrapper> | |
39 | void | |
40 | test01() | |
41 | { | |
42 | const int x[] = {1,2,3,4,5,6,7,8,9,10}; | |
43 | test_range<const int, in_wrapper> rx(x); | |
44 | int y[10]; | |
45 | test_range<int, out_wrapper> ry(y); | |
46 | auto out = ranges::sample(rx.begin(), rx.end(), ry.begin(), 20, rng); | |
47 | VERIFY( out.ptr == y+10 ); | |
48 | VERIFY( ranges::equal(x, y) ); | |
49 | ||
50 | for (int i = 0; i < 100; i++) | |
51 | { | |
52 | int z[5] = {0}; | |
53 | test_range<int, out_wrapper> rz(z); | |
54 | rx.bounds.first = x; | |
55 | auto out = ranges::sample(rx, rz.begin(), 5, rng); | |
56 | VERIFY( out.ptr == z+5 ); | |
57 | ranges::sort(z); | |
58 | VERIFY( ranges::adjacent_find(z) == out.ptr ); | |
59 | VERIFY( ranges::includes(x, z) ); | |
60 | } | |
61 | } | |
62 | ||
63 | int | |
64 | main() | |
65 | { | |
66 | test01<forward_iterator_wrapper, output_iterator_wrapper>(); | |
67 | test01<input_iterator_wrapper, random_access_iterator_wrapper>(); | |
68 | } |