Filename: //usr/include/c++/10///experimental/array

// <experimental/array> -*- C++ -*- // Copyright (C) 2015-2020 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file experimental/array * This is a TS C++ Library header. * @ingroup libfund-ts */ #ifndef _GLIBCXX_EXPERIMENTAL_ARRAY #define _GLIBCXX_EXPERIMENTAL_ARRAY 1 #pragma GCC system_header #if __cplusplus >= 201402L #include <array> #include <experimental/type_traits> namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace experimental { inline namespace fundamentals_v2 { #define __cpp_lib_experimental_make_array 201505 /** * @defgroup make_array Array creation functions * @ingroup libfund-ts * * Array creation functions as described in N4529, * Working Draft, C++ Extensions for Library Fundamentals, Version 2 * * @{ */ template<typename _Dest, typename... _Types> struct __make_array_elem { using type = _Dest; }; template<typename... _Types> struct __make_array_elem<void, _Types...> : common_type<_Types...> { template <typename> struct __is_reference_wrapper : false_type {}; template <typename _Up> struct __is_reference_wrapper<reference_wrapper<_Up>> : true_type {}; static_assert(!__or_<__is_reference_wrapper<decay_t<_Types>>...>::value, "make_array must be used with an explicit target type when" "any of the arguments is a reference_wrapper"); }; /// Create a std::array from a variable-length list of arguments. template <typename _Dest = void, typename... _Types> constexpr array<typename __make_array_elem<_Dest, _Types...>::type, sizeof...(_Types)> make_array(_Types&&... __t) { return {{ std::forward<_Types>(__t)... }}; } template <typename _Tp, size_t _Nm, size_t... _Idx> constexpr array<remove_cv_t<_Tp>, _Nm> __to_array(_Tp (&__a)[_Nm], index_sequence<_Idx...>) { return {{__a[_Idx]...}}; } /// Create a std::array from an array. template <typename _Tp, size_t _Nm> constexpr array<remove_cv_t<_Tp>, _Nm> to_array(_Tp (&__a)[_Nm]) noexcept(is_nothrow_constructible<remove_cv_t<_Tp>, _Tp&>::value) { return experimental::__to_array(__a, make_index_sequence<_Nm>{}); } // @} group make_array } // namespace fundamentals_v2 } // namespace experimental _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // C++14 #endif // _GLIBCXX_EXPERIMENTAL_ARRAY

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