1 // <experimental/numeric> -*- C++ -*-
2 
3 // Copyright (C) 2015-2017 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
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/numeric
26  *  This is a TS C++ Library header.
27  */
28 
29 //
30 // N4336 Working Draft, C++ Extensions for Library Fundamentals, Version 2
31 //
32 
33 #ifndef _GLIBCXX_EXPERIMENTAL_NUMERIC
34 #define _GLIBCXX_EXPERIMENTAL_NUMERIC 1
35 
36 #pragma GCC system_header
37 
38 #if __cplusplus >= 201402L
39 
40 #include <numeric>
41 #include <experimental/type_traits>
42 
43 namespace std _GLIBCXX_VISIBILITY(default)
44 {
45 namespace experimental
46 {
47 inline namespace fundamentals_v2
48 {
49 _GLIBCXX_BEGIN_NAMESPACE_VERSION
50 
51 #define __cpp_lib_experimental_gcd_lcm 201411
52 
53   /// Greatest common divisor
54   template<typename _Mn, typename _Nn>
55     constexpr common_type_t<_Mn, _Nn>
56     gcd(_Mn __m, _Nn __n)
57     {
58       static_assert(is_integral<_Mn>::value, "gcd arguments are integers");
59       static_assert(is_integral<_Nn>::value, "gcd arguments are integers");
60       static_assert(!is_same<_Mn, bool>::value, "gcd arguments are not bools");
61       static_assert(!is_same<_Nn, bool>::value, "gcd arguments are not bools");
62       return std::__detail::__gcd(__m, __n);
63     }
64 
65   /// Least common multiple
66   template<typename _Mn, typename _Nn>
67     constexpr common_type_t<_Mn, _Nn>
68     lcm(_Mn __m, _Nn __n)
69     {
70       static_assert(is_integral<_Mn>::value, "lcm arguments are integers");
71       static_assert(is_integral<_Nn>::value, "lcm arguments are integers");
72       static_assert(!is_same<_Mn, bool>::value, "lcm arguments are not bools");
73       static_assert(!is_same<_Nn, bool>::value, "lcm arguments are not bools");
74       return std::__detail::__lcm(__m, __n);
75     }
76 
77 _GLIBCXX_END_NAMESPACE_VERSION
78 } // namespace fundamentals_v2
79 } // namespace experimental
80 } // namespace std
81 
82 #endif // __cplusplus <= 201103L
83 
84 #endif // _GLIBCXX_EXPERIMENTAL_NUMERIC
85