Embedded Template Library 1.0
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permutations.h
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1
2
3/******************************************************************************
4The MIT License(MIT)
5
6Embedded Template Library.
7https://github.com/ETLCPP/etl
8https://www.etlcpp.com
9
10Copyright(c) 2018 John Wellbelove
11
12Permission is hereby granted, free of charge, to any person obtaining a copy
13of this software and associated documentation files(the "Software"), to deal
14in the Software without restriction, including without limitation the rights
15to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
16copies of the Software, and to permit persons to whom the Software is
17furnished to do so, subject to the following conditions :
18
19The above copyright notice and this permission notice shall be included in all
20copies or substantial portions of the Software.
21
22THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
25AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28SOFTWARE.
29******************************************************************************/
30
31#ifndef ETL_PERMUTATIONS_INCLUDED
32#define ETL_PERMUTATIONS_INCLUDED
33
34#include "platform.h"
35
39
40namespace etl
41{
42 //***************************************************************************
45 //***************************************************************************
46 template <size_t NV, size_t KV>
48 {
49 static ETL_CONSTANT size_t value = NV * permutations<NV - 1, KV - 1>::value;
50 };
51
52 template <size_t NV, size_t KV>
53 ETL_CONSTANT size_t permutations<NV, KV>::value;
54
55 //***************************************************************************
58 //***************************************************************************
59 template <size_t NV>
60 struct permutations<NV, 0>
61 {
62 static ETL_CONSTANT size_t value = 1UL;
63 };
64
65 template <size_t NV>
66 ETL_CONSTANT size_t permutations<NV, 0>::value;
67
68#if ETL_USING_CPP17
69 template <size_t NV, size_t KV>
70 inline constexpr size_t permutations_v = permutations<NV, KV>::value;
71#endif
72}
73
74#endif
Definition permutations.h:48
bitset_ext
Definition absolute.h:38
pair holds two objects of arbitrary type
Definition utility.h:164