Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / include / bits / move.h

diff --git a/libstdc++-v3/include/bits/move.h b/libstdc++-v3/include/bits/move.h
new file mode 100644 (file)
index 0000000..ef86c4d
--- /dev/null
+++ b/libstdc++-v3/include/bits/move.h
@@ -0,0 +1,98 @@
+// Move, forward and identity for C++0x + swap -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009 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 move.h
+ *  This is an internal header file, included by other library headers.
+ *  You should not attempt to use it directly.
+ */
+
+#ifndef _MOVE_H
+#define _MOVE_H 1
+
+#include <bits/c++config.h>
+#include <cstddef>
+#include <bits/concept_check.h>
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+#include <type_traits>
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+  // 20.2.2, forward/move
+  template<typename _Tp>
+    struct identity
+    {
+      typedef _Tp type;
+    };
+
+  template<typename _Tp>
+    inline _Tp&&
+    forward(typename std::identity<_Tp>::type&& __t)
+    { return __t; }
+
+  template<typename _Tp>
+    inline typename std::remove_reference<_Tp>::type&&
+    move(_Tp&& __t)
+    { return __t; }
+
+_GLIBCXX_END_NAMESPACE
+
+#define _GLIBCXX_MOVE(_Tp) std::move(_Tp)
+#else
+#define _GLIBCXX_MOVE(_Tp) (_Tp)
+#endif
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+  /**
+   *  @brief Swaps two values.
+   *  @param  a  A thing of arbitrary type.
+   *  @param  b  Another thing of arbitrary type.
+   *  @return   Nothing.
+  */
+  template<typename _Tp>
+    inline void
+    swap(_Tp& __a, _Tp& __b)
+    {
+      // concept requirements
+      __glibcxx_function_requires(_SGIAssignableConcept<_Tp>)
+
+      _Tp __tmp = _GLIBCXX_MOVE(__a);
+      __a = _GLIBCXX_MOVE(__b);
+      __b = _GLIBCXX_MOVE(__tmp);
+    }
+
+  // _GLIBCXX_RESOLVE_LIB_DEFECTS
+  // DR 809. std::swap should be overloaded for array types.
+  template<typename _Tp, size_t _Nm>
+    inline void
+    swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
+    {
+      for (size_t __n = 0; __n < _Nm; ++__n)
+       swap(__a[__n], __b[__n]);
+    }
+
+_GLIBCXX_END_NAMESPACE
+
+#endif /* _MOVE_H */