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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/erase_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/erase_fn_imps.hpp
new file mode 100644
index 00000000..508f586d
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/splay_tree_/erase_fn_imps.hpp
@@ -0,0 +1,157 @@
+// -*- 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 erase_fn_imps.hpp
+ * Contains an implementation class for splay_tree_.
+ */
+
+PB_DS_CLASS_T_DEC
+inline bool
+PB_DS_CLASS_C_DEC::
+erase(const_key_reference r_key)
+{
+  point_iterator it = find(r_key);
+  if (it == base_type::end())
+    return false;
+  erase(it);
+  return true;
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::iterator
+PB_DS_CLASS_C_DEC::
+erase(iterator it)
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid());
+  if (it == base_type::end())
+    return it;
+  iterator ret_it = it;
+  ++ret_it;
+  erase_node(it.m_p_nd);
+  _GLIBCXX_DEBUG_ONLY(assert_valid());
+  return ret_it;
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::reverse_iterator
+PB_DS_CLASS_C_DEC::
+erase(reverse_iterator it)
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid());
+  if (it.m_p_nd == base_type::m_p_head)
+    return (it);
+  reverse_iterator ret_it = it;
+  ++ret_it;
+  erase_node(it.m_p_nd);
+  _GLIBCXX_DEBUG_ONLY(assert_valid());
+  return ret_it;
+}
+
+PB_DS_CLASS_T_DEC
+template<typename Pred>
+inline typename PB_DS_CLASS_C_DEC::size_type
+PB_DS_CLASS_C_DEC::
+erase_if(Pred pred)
+{
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+  size_type num_ersd = 0;
+  iterator it = base_type::begin();
+  while (it != base_type::end())
+    {
+      if (pred(*it))
+        {
+	  ++num_ersd;
+	  it = erase(it);
+        }
+      else
+	++it;
+    }
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+  return num_ersd;
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+erase_node(node_pointer p_nd)
+{
+  _GLIBCXX_DEBUG_ASSERT(p_nd != NULL);
+  splay(p_nd);
+
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+  _GLIBCXX_DEBUG_ASSERT(p_nd == this->m_p_head->m_p_parent);
+
+  node_pointer p_l = p_nd->m_p_left;
+  node_pointer p_r = p_nd->m_p_right;
+
+  base_type::update_min_max_for_erased_node(p_nd);
+  base_type::actual_erase_node(p_nd);
+  if (p_r == NULL)
+    {
+      base_type::m_p_head->m_p_parent = p_l;
+      if (p_l != NULL)
+	p_l->m_p_parent = base_type::m_p_head;
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      return;
+    }
+
+  node_pointer p_target_r = leftmost(p_r);
+  _GLIBCXX_DEBUG_ASSERT(p_target_r != NULL);
+  p_r->m_p_parent = base_type::m_p_head;
+  base_type::m_p_head->m_p_parent = p_r;
+  splay(p_target_r);
+
+  _GLIBCXX_DEBUG_ONLY(p_target_r->m_p_left = NULL);
+  _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_parent == this->m_p_head);
+  _GLIBCXX_DEBUG_ASSERT(this->m_p_head->m_p_parent == p_target_r);
+
+  p_target_r->m_p_left = p_l;
+  if (p_l != NULL)
+    p_l->m_p_parent = p_target_r;
+  _GLIBCXX_DEBUG_ONLY(assert_valid();)
+  apply_update(p_target_r, (node_update* )this);
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::node_pointer
+PB_DS_CLASS_C_DEC::
+leftmost(node_pointer p_nd)
+{
+  _GLIBCXX_DEBUG_ASSERT(p_nd != NULL);
+  while (p_nd->m_p_left != NULL)
+    p_nd = p_nd->m_p_left;
+  return p_nd;
+}