// -*- C++ -*- // Copyright (C) 2015-2021 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 // . /** @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 #include 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 struct __make_array_elem { using type = _Dest; }; template struct __make_array_elem : common_type<_Types...> { template struct __is_reference_wrapper : false_type {}; template struct __is_reference_wrapper> : true_type {}; static_assert(!__or_<__is_reference_wrapper>...>::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 constexpr array::type, sizeof...(_Types)> make_array(_Types&&... __t) { return {{ std::forward<_Types>(__t)... }}; } template constexpr array, _Nm> __to_array(_Tp (&__a)[_Nm], index_sequence<_Idx...>) { return {{__a[_Idx]...}}; } /// Create a std::array from an array. template constexpr array, _Nm> to_array(_Tp (&__a)[_Nm]) noexcept(is_nothrow_constructible, _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