libstdc++: checkers.h Source File

libstdc++

checkers.h
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1// -*- C++ -*-
2
3// Copyright (C) 2007-2026 Free Software Foundation, Inc.
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 terms
7// of the GNU General Public License as published by the Free Software
8// Foundation; either version 3, or (at your option) any later
9// version.
10
11// This library is distributed in the hope that it will be useful, but
12// WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14// General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file parallel/checkers.h
26 * @brief Routines for checking the correctness of algorithm results.
27 * This file is a GNU parallel extension to the Standard C++ Library.
28 */
29
30// Written by Johannes Singler.
31
32#ifndef _GLIBCXX_PARALLEL_CHECKERS_H
33#define _GLIBCXX_PARALLEL_CHECKERS_H 1
34
35#include <cstdio>
36#include <bits/stl_algobase.h>
37#include <bits/stl_function.h>
38
39namespace __gnu_parallel
40{
41 /**
42 * @brief Check whether @c [__begin, @c __end) is sorted according
43 * to @c __comp.
44 * @param __begin Begin iterator of sequence.
45 * @param __end End iterator of sequence.
46 * @param __comp Comparator.
47 * @return @c true if sorted, @c false otherwise.
48 */
49 template<typename _IIter, typename _Compare>
50 bool
51 __is_sorted(_IIter __begin, _IIter __end, _Compare __comp)
52 {
53 if (__begin == __end)
54 return true;
55
56 _IIter __current(__begin), __recent(__begin);
57
58 for (__current++; __current != __end; __current++)
59 {
60 if (__comp(*__current, *__recent))
61 {
62 return false;
63 }
64 __recent = __current;
65 }
66
67 return true;
68 }
69}
70
71#endif /* _GLIBCXX_PARALLEL_CHECKERS_H */
cstdio
stl_algobase.h
stl_function.h
__gnu_parallel
GNU parallel code for public use.
Definition balanced_quicksort.h:62
__gnu_parallel::__is_sorted
bool __is_sorted(_IIter __begin, _IIter __end, _Compare __comp)
Check whether [__begin, __end) is sorted according to __comp.
Definition checkers.h:51