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// <experimental/numeric> -*- C++ -*- |
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// Copyright (C) 2015-2021 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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|
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file experimental/numeric |
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* This is a TS C++ Library header. |
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* @ingroup libfund-ts |
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*/ |
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// |
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// N4336 Working Draft, C++ Extensions for Library Fundamentals, Version 2 |
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// |
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|
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#ifndef _GLIBCXX_EXPERIMENTAL_NUMERIC |
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#define _GLIBCXX_EXPERIMENTAL_NUMERIC 1 |
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#pragma GCC system_header |
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#if __cplusplus >= 201402L |
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|
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#include <numeric> |
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#include <experimental/type_traits> |
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|
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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namespace experimental |
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{ |
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inline namespace fundamentals_v2 |
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{ |
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#define __cpp_lib_experimental_gcd_lcm 201411 |
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|
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/// Greatest common divisor |
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template<typename _Mn, typename _Nn> |
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constexpr common_type_t<_Mn, _Nn> |
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gcd(_Mn __m, _Nn __n) noexcept |
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{ |
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static_assert(is_integral_v<_Mn>, |
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"std::experimental::gcd arguments must be integers"); |
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static_assert(is_integral_v<_Nn>, |
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"std::experimental::gcd arguments must be integers"); |
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static_assert(_Mn(2) != _Mn(1), |
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"std::experimental::gcd arguments must not be bool"); |
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static_assert(_Nn(2) != _Nn(1), |
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"std::experimental::gcd arguments must not be bool"); |
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using _Up = make_unsigned_t<common_type_t<_Mn, _Nn>>; |
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return std::__detail::__gcd(std::__detail::__absu<_Up>(__m), |
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std::__detail::__absu<_Up>(__n)); |
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} |
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|
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/// Least common multiple |
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template<typename _Mn, typename _Nn> |
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constexpr common_type_t<_Mn, _Nn> |
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lcm(_Mn __m, _Nn __n) |
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{ |
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static_assert(is_integral_v<_Mn>, |
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"std::experimental::lcm arguments must be integers"); |
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static_assert(is_integral_v<_Nn>, |
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"std::experimental::lcm arguments must be integers"); |
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static_assert(_Mn(2) != _Mn(1), |
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"std::experimental::lcm arguments must not be bool"); |
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static_assert(_Nn(2) != _Nn(1), |
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"std::experimental::lcm arguments must not be bool"); |
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using _Up = make_unsigned_t<common_type_t<_Mn, _Nn>>; |
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return std::__detail::__lcm(std::__detail::__absu<_Up>(__m), |
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std::__detail::__absu<_Up>(__n)); |
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} |
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} // namespace fundamentals_v2 |
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} // namespace experimental |
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|
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_GLIBCXX_END_NAMESPACE_VERSION |
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} // namespace std |
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#endif // __cplusplus <= 201103L |
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|
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#endif // _GLIBCXX_EXPERIMENTAL_NUMERIC |
