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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/bin_search_tree_/debug_fn_imps.hpp b/libstdc++-v3/include/ext/pb_ds/detail/bin_search_tree_/debug_fn_imps.hpp
new file mode 100644
index 00000000..e3447bd4
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/bin_search_tree_/debug_fn_imps.hpp
@@ -0,0 +1,272 @@
+// -*- 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
+// .
+
+// 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 debug_fn_imps.hpp
+ * Contains an implementation class for bin_search_tree_.
+ */
+
+#ifdef _GLIBCXX_DEBUG
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_valid() const
+{
+ structure_only_assert_valid();
+ assert_consistent_with_debug_base();
+ assert_size();
+ assert_iterators();
+ if (m_p_head->m_p_parent == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_size == 0);
+ }
+ else
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_size > 0);
+ }
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+structure_only_assert_valid() const
+{
+ _GLIBCXX_DEBUG_ASSERT(m_p_head != NULL);
+ if (m_p_head->m_p_parent == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_left == m_p_head);
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_right == m_p_head);
+ }
+ else
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_parent->m_p_parent == m_p_head);
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_left != m_p_head);
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_right != m_p_head);
+ }
+
+ if (m_p_head->m_p_parent != NULL)
+ assert_node_consistent(m_p_head->m_p_parent);
+ assert_min();
+ assert_max();
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_node_consistent(const node_pointer p_nd) const
+{
+ assert_node_consistent_(p_nd);
+}
+
+PB_DS_CLASS_T_DEC
+typename PB_DS_CLASS_C_DEC::node_consistent_t
+PB_DS_CLASS_C_DEC::
+assert_node_consistent_(const node_pointer p_nd) const
+{
+ if (p_nd == NULL)
+ return (std::make_pair((const_pointer)NULL,(const_pointer)NULL));
+
+ assert_node_consistent_with_left(p_nd);
+ assert_node_consistent_with_right(p_nd);
+
+ const std::pair
+ l_range = assert_node_consistent_(p_nd->m_p_left);
+
+ if (l_range.second != NULL)
+ _GLIBCXX_DEBUG_ASSERT(Cmp_Fn::operator()(PB_DS_V2F(*l_range.second),
+ PB_DS_V2F(p_nd->m_value)));
+
+ const std::pair
+ r_range = assert_node_consistent_(p_nd->m_p_right);
+
+ if (r_range.first != NULL)
+ _GLIBCXX_DEBUG_ASSERT(Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value),
+ PB_DS_V2F(*r_range.first)));
+
+ return (std::make_pair((l_range.first != NULL)? l_range.first :& p_nd->m_value,(r_range.second != NULL)? r_range.second :& p_nd->m_value));
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_node_consistent_with_left(const node_pointer p_nd) const
+{
+ if (p_nd->m_p_left == NULL)
+ return;
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_left->m_p_parent == p_nd);
+ _GLIBCXX_DEBUG_ASSERT(!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_value),
+ PB_DS_V2F(p_nd->m_p_left->m_value)));
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_node_consistent_with_right(const node_pointer p_nd) const
+{
+ if (p_nd->m_p_right == NULL)
+ return;
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_right->m_p_parent == p_nd);
+ _GLIBCXX_DEBUG_ASSERT(!Cmp_Fn::operator()(PB_DS_V2F(p_nd->m_p_right->m_value),
+ PB_DS_V2F(p_nd->m_value)));
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_min() const
+{
+ assert_min_imp(m_p_head->m_p_parent);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_min_imp(const node_pointer p_nd) const
+{
+ if (p_nd == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_left == m_p_head);
+ return;
+ }
+
+ if (p_nd->m_p_left == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(p_nd == m_p_head->m_p_left);
+ return;
+ }
+ assert_min_imp(p_nd->m_p_left);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_max() const
+{
+ assert_max_imp(m_p_head->m_p_parent);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_max_imp(const node_pointer p_nd) const
+{
+ if (p_nd == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(m_p_head->m_p_right == m_p_head);
+ return;
+ }
+
+ if (p_nd->m_p_right == NULL)
+ {
+ _GLIBCXX_DEBUG_ASSERT(p_nd == m_p_head->m_p_right);
+ return;
+ }
+
+ assert_max_imp(p_nd->m_p_right);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_iterators() const
+{
+ size_type iterated_num = 0;
+ const_iterator prev_it = end();
+ for (const_iterator it = begin(); it != end(); ++it)
+ {
+ ++iterated_num;
+ _GLIBCXX_DEBUG_ASSERT(lower_bound(PB_DS_V2F(*it)).m_p_nd == it.m_p_nd);
+ const_iterator upper_bound_it = upper_bound(PB_DS_V2F(*it));
+ --upper_bound_it;
+ _GLIBCXX_DEBUG_ASSERT(upper_bound_it.m_p_nd == it.m_p_nd);
+
+ if (prev_it != end())
+ _GLIBCXX_DEBUG_ASSERT(Cmp_Fn::operator()(PB_DS_V2F(*prev_it),
+ PB_DS_V2F(*it)));
+ prev_it = it;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(iterated_num == m_size);
+ size_type reverse_iterated_num = 0;
+ const_reverse_iterator reverse_prev_it = rend();
+ for (const_reverse_iterator reverse_it = rbegin(); reverse_it != rend();
+ ++reverse_it)
+ {
+ ++reverse_iterated_num;
+ _GLIBCXX_DEBUG_ASSERT(lower_bound(
+ PB_DS_V2F(*reverse_it)).m_p_nd == reverse_it.m_p_nd);
+
+ const_iterator upper_bound_it = upper_bound(PB_DS_V2F(*reverse_it));
+ --upper_bound_it;
+ _GLIBCXX_DEBUG_ASSERT(upper_bound_it.m_p_nd == reverse_it.m_p_nd);
+ if (reverse_prev_it != rend())
+ _GLIBCXX_DEBUG_ASSERT(!Cmp_Fn::operator()(PB_DS_V2F(*reverse_prev_it),
+ PB_DS_V2F(*reverse_it)));
+ reverse_prev_it = reverse_it;
+ }
+ _GLIBCXX_DEBUG_ASSERT(reverse_iterated_num == m_size);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_consistent_with_debug_base() const
+{
+ debug_base::check_size(m_size);
+ assert_consistent_with_debug_base(m_p_head->m_p_parent);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_consistent_with_debug_base(const node_pointer p_nd) const
+{
+ if (p_nd == NULL)
+ return;
+ debug_base::check_key_exists(PB_DS_V2F(p_nd->m_value));
+ assert_consistent_with_debug_base(p_nd->m_p_left);
+ assert_consistent_with_debug_base(p_nd->m_p_right);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+assert_size() const
+{
+ _GLIBCXX_DEBUG_ASSERT(recursive_count(m_p_head->m_p_parent) == m_size);
+}
+
+#endif