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52066eae | 1 | // { dg-do run { target c++11 } } |
01bbe151 | 2 | |
8d9254fc | 3 | // Copyright (C) 2009-2020 Free Software Foundation, Inc. |
01bbe151 CJ |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | // 25.2.11 random_shuffle() | |
21 | ||
932f6f4a PC |
22 | // XXX FIXME: parallel-mode should deal correctly with moveable-only types |
23 | // per C++0x, at minimum smoothly fall back to serial. | |
24 | #undef _GLIBCXX_PARALLEL | |
25 | ||
01bbe151 CJ |
26 | #include <algorithm> |
27 | #include <testsuite_hooks.h> | |
28 | #include <testsuite_iterators.h> | |
29 | #include <testsuite_rvalref.h> | |
30 | ||
31 | using __gnu_test::test_container; | |
32 | using __gnu_test::random_access_iterator_wrapper; | |
33 | using __gnu_test::rvalstruct; | |
34 | ||
35 | typedef test_container<rvalstruct, random_access_iterator_wrapper> Container; | |
36 | ||
6b6254db AR |
37 | const unsigned int N = 10000; |
38 | int A[N]; // This is made global because we don't want it on the stack | |
01bbe151 CJ |
39 | |
40 | void fill_ascending() | |
41 | { | |
42 | for (int i = 0; i < N; ++i) | |
43 | A[i] = i; | |
44 | } | |
45 | ||
46 | void | |
47 | test01() | |
48 | { | |
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49 | fill_ascending(); |
50 | rvalstruct rv[N]; | |
51 | std::copy(A, A + N, rv); | |
52 | Container con(rv, rv + N); | |
53 | std::random_shuffle(con.begin(), con.end()); | |
54 | ||
55 | // The chance that random_shuffle leaves the order as is by coincidence | |
56 | // is negligible, so we expect it to be permuted | |
57 | VERIFY( !std::equal(rv, rv + N, A) ); | |
58 | ||
59 | std::sort(con.begin(), con.end()); | |
60 | VERIFY( std::equal(rv, rv + N, A) ); | |
61 | } | |
62 | ||
63 | int random_generator(int) | |
64 | { return 0; } | |
65 | ||
66 | void | |
67 | test02() | |
68 | { | |
01bbe151 CJ |
69 | rvalstruct rv[10] = {1,2,3,4,5,6,7,8,9,10}; |
70 | int result[10] = {10,1,2,3,4,5,6,7,8,9}; | |
71 | Container con(rv, rv + 10); | |
72 | std::random_shuffle(con.begin(), con.end(), random_generator); | |
73 | // The above answer was generated by hand. It is not required by the standard, | |
74 | // but is produced by the current algorithm. | |
75 | VERIFY( std::equal(rv, rv + 10, result) ); | |
76 | } | |
77 | ||
78 | int | |
79 | main() | |
80 | { | |
81 | test01(); | |
82 | test02(); | |
83 | return 0; | |
84 | } |