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f1717362 | 1 | // Copyright (C) 2013-2016 Free Software Foundation, Inc. |
bf7468d8 | 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++11" } | |
19 | // { dg-options "-std=gnu++11 -DSIMULATOR_TEST" { target simulator } } | |
20 | // { dg-require-cstdint "" } | |
21 | ||
22 | // 25.4.2 [lib.alg.nth.element] | |
23 | ||
24 | #include <algorithm> | |
25 | #include <random> | |
26 | #include <testsuite_hooks.h> | |
27 | #include <testsuite_iterators.h> | |
28 | #include <testsuite_containergen.h> | |
29 | ||
30 | using __gnu_test::test_container; | |
31 | using __gnu_test::random_access_iterator_wrapper; | |
32 | ||
33 | typedef test_container<int, random_access_iterator_wrapper> Container; | |
34 | ||
35 | struct testNthElement | |
36 | { | |
37 | template<typename Container, typename RandomGen> | |
38 | void operator()(Container con, RandomGen& rg) | |
39 | { | |
40 | bool test __attribute__((unused)) = true; | |
41 | ||
42 | const int size = con.end() - con.begin(); | |
43 | auto dist = std::uniform_int_distribution<>(0, size); | |
44 | const int element = dist(rg); | |
45 | ||
46 | std::nth_element(con.begin(), con.begin() + element, con.end()); | |
47 | ||
48 | if (element < size) | |
49 | { | |
50 | for (int i = 0; i < element; ++i) | |
51 | VERIFY( con.val(i) <= con.val(element) ); | |
52 | ||
53 | for (int i = element + 1; i < size; ++i) | |
54 | VERIFY( con.val(i) >= con.val(element) ); | |
55 | } | |
56 | } | |
57 | }; | |
58 | ||
59 | int | |
60 | main() | |
61 | { | |
62 | __gnu_test::test_containers<Container>(testNthElement()); | |
63 | } |