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1 | // Copyright (C) 2005 Free Software Foundation, Inc. |
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 2, 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 COPYING. If not, write to the Free | |
83f51799 | 16 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
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17 | // USA. |
18 | ||
19 | // 25.3.2 [lib.alg.nth.element] | |
20 | ||
21 | #include <algorithm> | |
22 | #include <testsuite_hooks.h> | |
23 | #include <testsuite_iterators.h> | |
24 | ||
25 | using __gnu_test::test_container; | |
26 | using __gnu_test::random_access_iterator_wrapper; | |
27 | using std::nth_element; | |
bd1a56a0 | 28 | using std::partial_sort; |
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29 | |
30 | typedef test_container<int, random_access_iterator_wrapper> Container; | |
31 | ||
32 | void | |
33 | test1() | |
34 | { | |
35 | int array[]={0}; | |
36 | Container con(array, array); | |
37 | partial_sort(con.begin(), con.begin(), con.end()); | |
38 | } | |
39 | ||
40 | void | |
41 | test2() | |
42 | { | |
43 | int array[]={2,1,0}; | |
44 | Container con(array, array + 2); | |
45 | partial_sort(con.begin(), con.begin(), con.end()); | |
46 | partial_sort(con.begin(), con.end(), con.end()); | |
47 | } | |
48 | ||
49 | void | |
50 | test3() | |
51 | { | |
847eb551 | 52 | bool test __attribute__((unused)) = true; |
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53 | int array[] = {6, 5, 4, 3, 2, 1, 0}; |
54 | Container con(array, array + 7); | |
55 | nth_element(con.begin(), con.it(3), con.end()); | |
56 | for(int i = 0; i < 3; ++i) | |
57 | VERIFY(array[i] < array[3]); | |
58 | for(int i = 4; i < 7; ++i) | |
59 | VERIFY(array[3] < array[i]); | |
60 | } | |
61 | ||
62 | void | |
63 | test4() | |
64 | { | |
847eb551 | 65 | bool test __attribute__((unused)) = true; |
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66 | int array[] = {0, 6, 1, 5, 2, 4, 3}; |
67 | Container con(array,array + 7); | |
68 | nth_element(con.begin(), con.it(3), con.end()); | |
69 | for(int i = 0; i < 3; ++i) | |
70 | VERIFY(array[i] < array[3]); | |
71 | for(int i = 4; i < 7; ++i) | |
72 | VERIFY(array[3] < array[i]); | |
73 | } | |
74 | ||
75 | int | |
76 | main() | |
77 | { | |
78 | test1(); | |
79 | test2(); | |
80 | test3(); | |
81 | test4(); | |
82 | } |