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1 | // <experimental/algorithm> -*- C++ -*- |
2 | ||
8d9254fc | 3 | // Copyright (C) 2014-2020 Free Software Foundation, Inc. |
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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 | // 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 experimental/algorithm | |
26 | * This is a TS C++ Library header. | |
1ababc8b | 27 | * @ingroup libfund-ts |
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28 | */ |
29 | ||
30 | #ifndef _GLIBCXX_EXPERIMENTAL_ALGORITHM | |
31 | #define _GLIBCXX_EXPERIMENTAL_ALGORITHM 1 | |
32 | ||
33 | #pragma GCC system_header | |
34 | ||
d681026d | 35 | #if __cplusplus >= 201402L |
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36 | |
37 | #include <algorithm> | |
e347987d | 38 | #include <experimental/bits/lfts_config.h> |
37cb7887 | 39 | #include <experimental/random> |
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40 | |
41 | namespace std _GLIBCXX_VISIBILITY(default) | |
42 | { | |
4a15d842 FD |
43 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
44 | ||
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45 | namespace experimental |
46 | { | |
37cb7887 | 47 | inline namespace fundamentals_v2 |
43e9f722 | 48 | { |
43e9f722 JW |
49 | template<typename _ForwardIterator, typename _Searcher> |
50 | inline _ForwardIterator | |
51 | search(_ForwardIterator __first, _ForwardIterator __last, | |
52 | const _Searcher& __searcher) | |
53 | { return __searcher(__first, __last); } | |
54 | ||
55 | #define __cpp_lib_experimental_sample 201402 | |
56 | ||
43e9f722 JW |
57 | /// Take a random sample from a population. |
58 | template<typename _PopulationIterator, typename _SampleIterator, | |
59 | typename _Distance, typename _UniformRandomNumberGenerator> | |
60 | _SampleIterator | |
61 | sample(_PopulationIterator __first, _PopulationIterator __last, | |
62 | _SampleIterator __out, _Distance __n, | |
63 | _UniformRandomNumberGenerator&& __g) | |
64 | { | |
65 | using __pop_cat = typename | |
66 | std::iterator_traits<_PopulationIterator>::iterator_category; | |
67 | using __samp_cat = typename | |
68 | std::iterator_traits<_SampleIterator>::iterator_category; | |
69 | ||
70 | static_assert( | |
71 | __or_<is_convertible<__pop_cat, forward_iterator_tag>, | |
72 | is_convertible<__samp_cat, random_access_iterator_tag>>::value, | |
73 | "output range must use a RandomAccessIterator when input range" | |
74 | " does not meet the ForwardIterator requirements"); | |
75 | ||
76 | static_assert(is_integral<_Distance>::value, | |
77 | "sample size must be an integer type"); | |
78 | ||
12d3f34b | 79 | typename iterator_traits<_PopulationIterator>::difference_type __d = __n; |
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80 | return _GLIBCXX_STD_A:: |
81 | __sample(__first, __last, __pop_cat{}, __out, __samp_cat{}, __d, | |
82 | std::forward<_UniformRandomNumberGenerator>(__g)); | |
43e9f722 | 83 | } |
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84 | |
85 | template<typename _PopulationIterator, typename _SampleIterator, | |
86 | typename _Distance> | |
87 | inline _SampleIterator | |
88 | sample(_PopulationIterator __first, _PopulationIterator __last, | |
89 | _SampleIterator __out, _Distance __n) | |
90 | { | |
91 | return experimental::sample(__first, __last, __out, __n, | |
92 | _S_randint_engine()); | |
93 | } | |
94 | ||
95 | template<typename _RandomAccessIterator> | |
96 | inline void | |
97 | shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) | |
98 | { return std::shuffle(__first, __last, _S_randint_engine()); } | |
99 | ||
100 | } // namespace fundamentals_v2 | |
43e9f722 | 101 | } // namespace experimental |
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102 | |
103 | _GLIBCXX_END_NAMESPACE_VERSION | |
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104 | } // namespace std |
105 | ||
106 | #endif // C++14 | |
107 | ||
108 | #endif // _GLIBCXX_EXPERIMENTAL_ALGORITHM |