| // <experimental/array> -*- C++ -*- |
| |
| // Copyright (C) 2015-2016 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. |
| */ |
| |
| #ifndef _GLIBCXX_EXPERIMENTAL_ARRAY |
| #define _GLIBCXX_EXPERIMENTAL_ARRAY 1 |
| |
| #pragma GCC system_header |
| |
| #if __cplusplus <= 201103L |
| # include <bits/c++14_warning.h> |
| #else |
| |
| #include <array> |
| #include <functional> |
| #include <experimental/type_traits> |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| namespace experimental |
| { |
| inline namespace fundamentals_v2 |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| #define __cpp_lib_experimental_make_array 201505 |
| /** |
| * @defgroup make_array Array creation functions |
| * @ingroup experimental |
| * |
| * Array creation functions as described in N4529, |
| * Working Draft, C++ Extensions for Library Fundamentals, Version 2 |
| * |
| * @{ |
| */ |
| |
| template <typename _Up> |
| struct __is_reference_wrapper : false_type |
| {}; |
| |
| template <typename _Up> |
| struct __is_reference_wrapper<reference_wrapper<_Up>> : true_type |
| {}; |
| |
| template <typename _Dest = void, typename... _Types> |
| constexpr auto |
| make_array(_Types&&... __t) |
| -> array<conditional_t<is_void_v<_Dest>, |
| common_type_t<_Types...>, |
| _Dest>, |
| sizeof...(_Types)> |
| { |
| static_assert(__or_< |
| __not_<is_void<_Dest>>, |
| __and_<__not_<__is_reference_wrapper<decay_t<_Types>>>...>> |
| ::value, |
| "make_array cannot be used without an explicit target type " |
| "if any of the types given is a reference_wrapper"); |
| return {{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]...}}; |
| } |
| |
| template <typename _Tp, size_t _Nm> |
| constexpr array<remove_cv_t<_Tp>, _Nm> |
| to_array(_Tp (&__a)[_Nm]) |
| { |
| return __to_array(__a, make_index_sequence<_Nm>{}); |
| } |
| |
| // @} group make_array |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace fundamentals_v2 |
| } // namespace experimental |
| |
| } // namespace std |
| |
| #endif // C++14 |
| |
| #endif // _GLIBCXX_EXPERIMENTAL_ARRAY |