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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/cond_dtor_entry_dealtor.hpp b/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/cond_dtor_entry_dealtor.hpp
new file mode 100644
index 00000000..184b9865
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/pat_trie_/cond_dtor_entry_dealtor.hpp
@@ -0,0 +1,79 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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/>.
+
+// 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 cond_dtor_entry_dealtor.hpp
+ * Contains a binary tree container conditional deallocator
+ */
+
+class cond_dealtor
+{
+public:
+  inline
+  cond_dealtor(leaf_pointer p_nd) : m_p_nd(p_nd),
+				    m_no_action_dtor(false),
+				    m_call_destructor(false)
+  { }
+
+  inline void
+  set_no_action_dtor()
+  {
+    m_no_action_dtor = true;
+  }
+
+  inline void
+  set_call_destructor()
+  {
+    m_call_destructor = true;
+  }
+
+  inline
+  ~cond_dealtor()
+  {
+    if (m_no_action_dtor)
+      return;
+
+    if (m_call_destructor)
+      m_p_nd->~leaf();
+
+    s_leaf_allocator.deallocate(m_p_nd, 1);
+  }
+
+protected:
+  leaf_pointer m_p_nd;
+  bool m_no_action_dtor;
+  bool m_call_destructor;
+};
+