1 files changed, 128 insertions, 0 deletions
diff --git a/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/const_child_iterator.hpp b/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/const_child_iterator.hpp
new file mode 100644
index 00000000000..d0e1ce98ce8
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/const_child_iterator.hpp
@@ -0,0 +1,128 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006 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) 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.
+
+// 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.
+
+// 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.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file const_child_iterator.hpp
+ * Contains a const_iterator for a patricia tree.
+ */
+
+struct const_iterator
+{
+public:
+  typedef std::forward_iterator_tag iterator_category;
+
+  typedef typename Allocator::difference_type difference_type;
+
+  typedef node_pointer value_type;
+
+  typedef node_pointer_pointer pointer;
+
+  typedef node_pointer_reference reference;
+
+public:
+  inline
+  const_iterator(node_pointer_pointer p_p_cur = NULL,  node_pointer_pointer p_p_end = NULL) : m_p_p_cur(p_p_cur),
+											      m_p_p_end(p_p_end)
+  { }
+
+  inline bool
+  operator==(const const_iterator& other) const
+  {
+    return (m_p_p_cur == other.m_p_p_cur);
+  }
+
+  inline bool
+  operator!=(const const_iterator& other) const
+  {
+    return (m_p_p_cur != other.m_p_p_cur);
+  }
+
+  inline const_iterator& 
+  operator++()
+  {
+    do
+      ++m_p_p_cur;
+    while (m_p_p_cur != m_p_p_end&& * m_p_p_cur == NULL);
+
+    return (*this);
+  }
+
+  inline const_iterator
+  operator++(int)
+  {
+    const_iterator ret_it(*this);
+
+    operator++();
+
+    return (ret_it);
+  }
+
+  const node_pointer_pointer
+  operator->() const
+  {
+    PB_DS_DBG_ONLY(assert_referencible();)
+
+      return (m_p_p_cur);
+  }
+
+  const_node_pointer
+  operator*() const
+  {
+    PB_DS_DBG_ONLY(assert_referencible();)
+
+      return (*m_p_p_cur);
+  }
+
+protected:
+#ifdef PB_DS_PAT_TRIE_DEBUG_
+  void
+  assert_referencible() const
+  {
+    PB_DS_DBG_ASSERT(m_p_p_cur != m_p_p_end&& * m_p_p_cur != NULL);
+  }
+#endif // #ifdef PB_DS_PAT_TRIE_DEBUG_
+
+public:
+  node_pointer_pointer m_p_p_cur;
+
+  node_pointer_pointer m_p_p_end;
+};
+