// <utility> -*- C++ -*-
-// Copyright (C) 2001 Free Software Foundation, Inc.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+// 2010, 2011
+// 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 2, or (at your option)
+// 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,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
+// 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.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// 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/>.
/*
*
* purpose. It is provided "as is" without express or implied warranty.
*/
-/** @file std_utility.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+/** @file include/utility
+ * This is a Standard C++ Library header.
*/
-#ifndef _CPP_UTILITY
-#define _CPP_UTILITY 1
+#ifndef _GLIBCXX_UTILITY
+#define _GLIBCXX_UTILITY 1
#pragma GCC system_header
+
+/**
+ * @defgroup utilities Utilities
+ *
+ * Components deemed generally useful. Includes pair, tuple,
+ * forward/move helpers, ratio, function object, metaprogramming and
+ * type traits, time, date, and memory functions.
+ */
+
#include <bits/c++config.h>
#include <bits/stl_relops.h>
#include <bits/stl_pair.h>
-#endif /* _CPP_UTILITY */
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+#include <bits/move.h>
+#include <initializer_list>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ template<class _Tp>
+ class tuple_size;
+
+ template<std::size_t _Int, class _Tp>
+ class tuple_element;
+
+ // Various functions which give std::pair a tuple-like interface.
+ template<class _Tp1, class _Tp2>
+ struct tuple_size<std::pair<_Tp1, _Tp2>>
+ : public integral_constant<std::size_t, 2> { };
+
+ template<class _Tp1, class _Tp2>
+ struct tuple_element<0, std::pair<_Tp1, _Tp2>>
+ { typedef _Tp1 type; };
+
+ template<class _Tp1, class _Tp2>
+ struct tuple_element<1, std::pair<_Tp1, _Tp2>>
+ { typedef _Tp2 type; };
+
+ template<std::size_t _Int>
+ struct __pair_get;
+
+ template<>
+ struct __pair_get<0>
+ {
+ template<typename _Tp1, typename _Tp2>
+ static constexpr _Tp1&
+ __get(std::pair<_Tp1, _Tp2>& __pair) noexcept
+ { return __pair.first; }
+
+ template<typename _Tp1, typename _Tp2>
+ static constexpr _Tp1&&
+ __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept
+ { return std::forward<_Tp1>(__pair.first); }
+
+ template<typename _Tp1, typename _Tp2>
+ static constexpr const _Tp1&
+ __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept
+ { return __pair.first; }
+ };
+
+ template<>
+ struct __pair_get<1>
+ {
+ template<typename _Tp1, typename _Tp2>
+ static constexpr _Tp2&
+ __get(std::pair<_Tp1, _Tp2>& __pair) noexcept
+ { return __pair.second; }
+
+ template<typename _Tp1, typename _Tp2>
+ static constexpr _Tp2&&
+ __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept
+ { return std::forward<_Tp2>(__pair.second); }
+
+ template<typename _Tp1, typename _Tp2>
+ static constexpr const _Tp2&
+ __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept
+ { return __pair.second; }
+ };
+
+ template<std::size_t _Int, class _Tp1, class _Tp2>
+ constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&
+ get(std::pair<_Tp1, _Tp2>& __in) noexcept
+ { return __pair_get<_Int>::__get(__in); }
+
+ template<std::size_t _Int, class _Tp1, class _Tp2>
+ constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&&
+ get(std::pair<_Tp1, _Tp2>&& __in) noexcept
+ { return __pair_get<_Int>::__move_get(std::move(__in)); }
+
+ template<std::size_t _Int, class _Tp1, class _Tp2>
+ constexpr const typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&
+ get(const std::pair<_Tp1, _Tp2>& __in) noexcept
+ { return __pair_get<_Int>::__const_get(__in); }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif
-// Local Variables:
-// mode:C++
-// End:
+#endif /* _GLIBCXX_UTILITY */
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