--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009, 2010, 2011 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 pat_trie_/erase_fn_imps.hpp
+ * Contains an implementation class for pat_trie.
+ */
+
+PB_DS_CLASS_T_DEC
+inline bool
+PB_DS_CLASS_C_DEC::
+erase(key_const_reference r_key)
+{
+ node_pointer p_nd = find_imp(r_key);
+ if (p_nd == 0 || p_nd->m_type == i_node)
+ {
+ PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
+ return false;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == leaf_node);
+ if (!synth_access_traits::equal_keys(PB_DS_V2F(reinterpret_cast<leaf_pointer>(p_nd)->value()), r_key))
+ {
+ PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
+ return false;
+ }
+
+ PB_DS_CHECK_KEY_EXISTS(r_key)
+ erase_leaf(static_cast<leaf_pointer>(p_nd));
+ PB_DS_ASSERT_VALID((*this))
+ return true;
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+erase_fixup(inode_pointer p_nd)
+{
+ _GLIBCXX_DEBUG_ASSERT(std::distance(p_nd->begin(), p_nd->end()) >= 1);
+ if (std::distance(p_nd->begin(), p_nd->end()) == 1)
+ {
+ node_pointer p_parent = p_nd->m_p_parent;
+ if (p_parent == m_p_head)
+ m_p_head->m_p_parent = *p_nd->begin();
+ else
+ {
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_type == i_node);
+ node_pointer p_new_child = *p_nd->begin();
+
+ typedef inode_pointer inode_ptr;
+ inode_ptr p_internal = static_cast<inode_ptr>(p_parent);
+ p_internal->replace_child(p_new_child, pref_begin(p_new_child),
+ pref_end(p_new_child), this);
+ }
+ (*p_nd->begin())->m_p_parent = p_nd->m_p_parent;
+ p_nd->~inode();
+ s_inode_allocator.deallocate(p_nd, 1);
+
+ if (p_parent == m_p_head)
+ return;
+
+ _GLIBCXX_DEBUG_ASSERT(p_parent->m_type == i_node);
+ p_nd = static_cast<inode_pointer>(p_parent);
+ }
+
+ while (true)
+ {
+ _GLIBCXX_DEBUG_ASSERT(std::distance(p_nd->begin(), p_nd->end()) > 1);
+ p_nd->update_prefixes(this);
+ apply_update(p_nd, (node_update*)this);
+ PB_DS_ASSERT_NODE_VALID(p_nd)
+ if (p_nd->m_p_parent->m_type == head_node)
+ return;
+
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_p_parent->m_type == i_node);
+
+ p_nd = static_cast<inode_pointer>(p_nd->m_p_parent);
+ }
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+actual_erase_leaf(leaf_pointer p_l)
+{
+ _GLIBCXX_DEBUG_ASSERT(m_size > 0);
+ --m_size;
+ _GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(p_l->value())));
+ p_l->~leaf();
+ s_leaf_allocator.deallocate(p_l, 1);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+clear()
+{
+ if (!empty())
+ {
+ clear_imp(m_p_head->m_p_parent);
+ m_size = 0;
+ initialize();
+ _GLIBCXX_DEBUG_ONLY(debug_base::clear();)
+ PB_DS_ASSERT_VALID((*this))
+ }
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+clear_imp(node_pointer p_nd)
+{
+ if (p_nd->m_type == i_node)
+ {
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == i_node);
+ for (typename inode::iterator it =
+ static_cast<inode_pointer>(p_nd)->begin();
+ it != static_cast<inode_pointer>(p_nd)->end();
+ ++it)
+ {
+ node_pointer p_child =* it;
+ clear_imp(p_child);
+ }
+ s_inode_allocator.deallocate(static_cast<inode_pointer>(p_nd), 1);
+ return;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(p_nd->m_type == leaf_node);
+ static_cast<leaf_pointer>(p_nd)->~leaf();
+ s_leaf_allocator.deallocate(static_cast<leaf_pointer>(p_nd), 1);
+}
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::const_iterator
+PB_DS_CLASS_C_DEC::
+erase(const_iterator it)
+{
+ PB_DS_ASSERT_VALID((*this))
+
+ if (it == end())
+ return it;
+
+ const_iterator ret_it = it;
+ ++ret_it;
+ _GLIBCXX_DEBUG_ASSERT(it.m_p_nd->m_type == leaf_node);
+ erase_leaf(static_cast<leaf_pointer>(it.m_p_nd));
+ PB_DS_ASSERT_VALID((*this))
+ return ret_it;
+}
+
+#ifdef PB_DS_DATA_TRUE_INDICATOR
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::iterator
+PB_DS_CLASS_C_DEC::
+erase(iterator it)
+{
+ PB_DS_ASSERT_VALID((*this))
+
+ if (it == end())
+ return it;
+ iterator ret_it = it;
+ ++ret_it;
+ _GLIBCXX_DEBUG_ASSERT(it.m_p_nd->m_type == leaf_node);
+ erase_leaf(static_cast<leaf_pointer>(it.m_p_nd));
+ PB_DS_ASSERT_VALID((*this))
+ return ret_it;
+}
+#endif // #ifdef PB_DS_DATA_TRUE_INDICATOR
+
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::const_reverse_iterator
+PB_DS_CLASS_C_DEC::
+erase(const_reverse_iterator it)
+{
+ PB_DS_ASSERT_VALID((*this))
+
+ if (it.m_p_nd == m_p_head)
+ return it;
+ const_reverse_iterator ret_it = it;
+ ++ret_it;
+
+ _GLIBCXX_DEBUG_ASSERT(it.m_p_nd->m_type == leaf_node);
+ erase_leaf(static_cast<leaf_pointer>(it.m_p_nd));
+ PB_DS_ASSERT_VALID((*this))
+ return ret_it;
+}
+
+#ifdef PB_DS_DATA_TRUE_INDICATOR
+PB_DS_CLASS_T_DEC
+inline typename PB_DS_CLASS_C_DEC::reverse_iterator
+PB_DS_CLASS_C_DEC::
+erase(reverse_iterator it)
+{
+ PB_DS_ASSERT_VALID((*this))
+
+ if (it.m_p_nd == m_p_head)
+ return it;
+ reverse_iterator ret_it = it;
+ ++ret_it;
+
+ _GLIBCXX_DEBUG_ASSERT(it.m_p_nd->m_type == leaf_node);
+ erase_leaf(static_cast<leaf_pointer>(it.m_p_nd));
+ PB_DS_ASSERT_VALID((*this))
+ return ret_it;
+}
+#endif // #ifdef PB_DS_DATA_TRUE_INDICATOR
+
+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)
+{
+ size_type num_ersd = 0;
+ PB_DS_ASSERT_VALID((*this))
+
+ iterator it = begin();
+ while (it != end())
+ {
+ PB_DS_ASSERT_VALID((*this))
+ if (pred(*it))
+ {
+ ++num_ersd;
+ it = erase(it);
+ }
+ else
+ ++it;
+ }
+
+ PB_DS_ASSERT_VALID((*this))
+ return num_ersd;
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+erase_leaf(leaf_pointer p_l)
+{
+ update_min_max_for_erased_leaf(p_l);
+ if (p_l->m_p_parent->m_type == head_node)
+ {
+ _GLIBCXX_DEBUG_ASSERT(size() == 1);
+ clear();
+ return;
+ }
+
+ _GLIBCXX_DEBUG_ASSERT(size() > 1);
+ _GLIBCXX_DEBUG_ASSERT(p_l->m_p_parent->m_type == i_node);
+
+ inode_pointer p_parent = static_cast<inode_pointer>(p_l->m_p_parent);
+
+ p_parent->remove_child(p_l);
+ erase_fixup(p_parent);
+ actual_erase_leaf(p_l);
+}
+
+PB_DS_CLASS_T_DEC
+void
+PB_DS_CLASS_C_DEC::
+update_min_max_for_erased_leaf(leaf_pointer p_l)
+{
+ if (m_size == 1)
+ {
+ m_p_head->m_p_min = m_p_head;
+ m_p_head->m_p_max = m_p_head;
+ return;
+ }
+
+ if (p_l == static_cast<leaf_const_pointer>(m_p_head->m_p_min))
+ {
+ iterator it(p_l);
+ ++it;
+ m_p_head->m_p_min = it.m_p_nd;
+ return;
+ }
+
+ if (p_l == static_cast<leaf_const_pointer>(m_p_head->m_p_max))
+ {
+ iterator it(p_l);
+ --it;
+ m_p_head->m_p_max = it.m_p_nd;
+ }
+}
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