libstdc++-v3/include/experimental/numeric

   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 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  46
  47 namespace experimental
  48 {
  49 inline namespace fundamentals_v2
  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 } // namespace fundamentals_v2
  77 } // namespace experimental
  78
  79 _GLIBCXX_END_NAMESPACE_VERSION
  80 } // namespace std
  81
  82 #endif // __cplusplus <= 201103L
  83
  84 #endif // _GLIBCXX_EXPERIMENTAL_NUMERIC