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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/list_update_map_/find_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/list_update_map_/find_fn_imps.hpp
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--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/list_update_map_/find_fn_imps.hpp
@@ -0,0 +1,90 @@
+// -*- 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 find_fn_imps.hpp
+ * Contains implementations of lu_map_.
+ */
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::entry_pointer
+PB_DS_CLASS_C_DEC::
+find_imp(const_key_reference r_key) const
+{
+  if (m_p_l == NULL)
+    return NULL;
+  if (s_eq_fn(r_key, PB_DS_V2F(m_p_l->m_value)))
+    {
+      apply_update(m_p_l, s_metadata_type_indicator);
+      _GLIBCXX_DEBUG_ONLY(debug_base::check_key_exists(r_key);)
+      return m_p_l;
+    }
+
+  entry_pointer p_l = m_p_l;
+  while (p_l->m_p_next != NULL)
+    {
+      entry_pointer p_next = p_l->m_p_next;
+      if (s_eq_fn(r_key, PB_DS_V2F(p_next->m_value)))
+        {
+	  if (apply_update(p_next, s_metadata_type_indicator))
+            {
+	      p_l->m_p_next = p_next->m_p_next;
+	      p_next->m_p_next = m_p_l;
+	      m_p_l = p_next;
+	      return m_p_l;
+            }
+	  return p_next;
+        }
+      else
+	p_l = p_next;
+    }
+
+  _GLIBCXX_DEBUG_ONLY(debug_base::check_key_does_not_exist(r_key);)
+  return NULL;
+}
+
+PB_DS_CLASS_T_DEC
+template<typename Metadata>
+inline bool
+PB_DS_CLASS_C_DEC::
+apply_update(entry_pointer p_l, type_to_type<Metadata>)
+{ return s_update_policy(p_l->m_update_metadata); }
+
+PB_DS_CLASS_T_DEC
+inline bool
+PB_DS_CLASS_C_DEC::
+apply_update(entry_pointer, type_to_type<null_lu_metadata>)
+{ return s_update_policy(s_null_lu_metadata); }
+