1 files changed, 113 insertions, 0 deletions
diff --git a/libstdc++-v3/include/debug/stl_iterator.h b/libstdc++-v3/include/debug/stl_iterator.h
new file mode 100644
index 00000000000..d1e57ea75a0
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+++ b/libstdc++-v3/include/debug/stl_iterator.h
@@ -0,0 +1,113 @@
+// Debugging support implementation -*- C++ -*-
+
+// Copyright (C) 2015 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 debug/stl_iterator.h
+ *  This file is a GNU debug extension to the Standard C++ Library.
+ */
+
+#ifndef _GLIBCXX_DEBUG_STL_ITERATOR_H
+#define _GLIBCXX_DEBUG_STL_ITERATOR_H 1
+
+#include <debug/helper_functions.h>
+
+namespace __gnu_debug
+{
+  // Help Debug mode to see through reverse_iterator.
+  template<typename _Iterator>
+    inline bool
+    __valid_range(const std::reverse_iterator<_Iterator>& __first,
+		  const std::reverse_iterator<_Iterator>& __last,
+		  typename _Distance_traits<_Iterator>::__type& __dist)
+    { return __valid_range(__last.base(), __first.base(), __dist); }
+
+  template<typename _Iterator>
+    inline typename _Distance_traits<_Iterator>::__type
+    __get_distance(const std::reverse_iterator<_Iterator>& __first,
+		   const std::reverse_iterator<_Iterator>& __last)
+    { return __get_distance(__last.base(), __first.base()); }
+
+#if __cplusplus < 201103L
+  template<typename _Iterator>
+    struct __is_safe_random_iterator<std::reverse_iterator<_Iterator> >
+      : __is_safe_random_iterator<_Iterator>
+    { };
+
+  template<typename _Iterator>
+    struct _Unsafe_type<std::reverse_iterator<_Iterator> >
+    {
+      typedef typename _Unsafe_type<_Iterator>::_Type _UnsafeType;
+      typedef std::reverse_iterator<_UnsafeType> _Type;
+    };
+
+  template<typename _Iterator>
+    inline std::reverse_iterator<typename _Unsafe_type<_Iterator>::_Type>
+    __unsafe(const std::reverse_iterator<_Iterator>& __it)
+    {
+      typedef typename _Unsafe_type<_Iterator>::_Type _UnsafeType;
+      return std::reverse_iterator<_UnsafeType>(__unsafe(__it.base()));
+    }
+#else
+  template<typename _Iterator>
+    inline auto
+    __base(const std::reverse_iterator<_Iterator>& __it)
+    -> decltype(std::__make_reverse_iterator(__base(__it.base())))
+    { return std::__make_reverse_iterator(__base(__it.base())); }
+
+  template<typename _Iterator>
+    inline auto
+    __unsafe(const std::reverse_iterator<_Iterator>& __it)
+    -> decltype(std::__make_reverse_iterator(__unsafe(__it.base())))
+    { return std::__make_reverse_iterator(__unsafe(__it.base())); }
+#endif
+
+#if __cplusplus >= 201103L
+  // Help Debug mode to see through move_iterator.
+  template<typename _Iterator>
+    inline bool
+    __valid_range(const std::move_iterator<_Iterator>& __first,
+		  const std::move_iterator<_Iterator>& __last,
+		  typename _Distance_traits<_Iterator>::__type& __dist)
+    { return __valid_range(__first.base(), __last.base(), __dist); }
+
+  template<typename _Iterator>
+    inline typename _Distance_traits<_Iterator>::__type
+    __get_distance(const std::move_iterator<_Iterator>& __first,
+		   const std::move_iterator<_Iterator>& __last)
+    { return __get_distance(__first.base(), __last.base()); }
+
+  template<typename _Iterator>
+    inline auto
+    __unsafe(const std::move_iterator<_Iterator>& __it)
+    -> decltype(std::make_move_iterator(__unsafe(__it.base())))
+    { return std::make_move_iterator(__unsafe(__it.base())); }
+
+  template<typename _Iterator>
+    inline auto
+    __base(const std::move_iterator<_Iterator>& __it)
+    -> decltype(std::make_move_iterator(__base(__it.base())))
+    { return std::make_move_iterator(__base(__it.base())); }
+#endif
+}
+
+#endif