<h2>Editing File: /usr/include/c++/8/experimental/array</h2><form method='post'><textarea name='content' class='file-edit'>// &lt;experimental/array&gt; -*- C++ -*-

// Copyright (C) 2015-2018 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
// &lt;http://www.gnu.org/licenses/&gt;.

/** @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 &gt;= 201402L

#include &lt;array&gt;
#include &lt;experimental/type_traits&gt;

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 experimental
   *
   * Array creation functions as described in N4529,
   * Working Draft, C++ Extensions for Library Fundamentals, Version 2
   *
   * @{
   */

template&lt;typename _Dest, typename... _Types&gt;
  struct __make_array_elem
  {
    using type = _Dest;
  };

template&lt;typename... _Types&gt;
  struct __make_array_elem&lt;void, _Types...&gt;
  : common_type&lt;_Types...&gt;
  {
    template &lt;typename&gt;
      struct __is_reference_wrapper : false_type
      {};

    template &lt;typename _Up&gt;
      struct __is_reference_wrapper&lt;reference_wrapper&lt;_Up&gt;&gt; : true_type
      {};

    static_assert(!__or_&lt;__is_reference_wrapper&lt;decay_t&lt;_Types&gt;&gt;...&gt;::value,
                  &quot;make_array must be used with an explicit target type when&quot;
                  &quot;any of the arguments is a reference_wrapper&quot;);
  };

template &lt;typename _Dest = void, typename... _Types&gt;
  constexpr
  array&lt;typename __make_array_elem&lt;_Dest, _Types...&gt;::type, sizeof...(_Types)&gt;
  make_array(_Types&amp;&amp;... __t)
  {
    return {{ std::forward&lt;_Types&gt;(__t)... }};
  }

template &lt;typename _Tp, size_t _Nm, size_t... _Idx&gt;
  constexpr array&lt;remove_cv_t&lt;_Tp&gt;, _Nm&gt;
  __to_array(_Tp (&amp;__a)[_Nm], index_sequence&lt;_Idx...&gt;)
  {
    return {{__a[_Idx]...}};
  }

template &lt;typename _Tp, size_t _Nm&gt;
  constexpr array&lt;remove_cv_t&lt;_Tp&gt;, _Nm&gt;
  to_array(_Tp (&amp;__a)[_Nm])
  noexcept(is_nothrow_constructible&lt;remove_cv_t&lt;_Tp&gt;, _Tp&amp;&gt;::value)
  {
    return __to_array(__a, make_index_sequence&lt;_Nm&gt;{});
  }

  // @} 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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