text: // -*- C++ -*-
  
  // Copyright (C) 2005-2017 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 binary_heap_/insert_fn_imps.hpp
   * Contains an implementation class for a binary_heap.
   */
  
  PB_DS_CLASS_T_DEC
  inline typename PB_DS_CLASS_C_DEC::point_iterator
  PB_DS_CLASS_C_DEC::
  push(const_reference r_val)
  {
    PB_DS_ASSERT_VALID((*this))
    insert_value(r_val, s_no_throw_copies_ind);
    push_heap();
    PB_DS_ASSERT_VALID((*this))
    return point_iterator(m_a_entries);
  }
  
  PB_DS_CLASS_T_DEC
  inline void
  PB_DS_CLASS_C_DEC::
  insert_value(value_type val, true_type)
  {
    resize_for_insert_if_needed();
    m_a_entries[m_size++] = val;
  }
  
  PB_DS_CLASS_T_DEC
  inline void
  PB_DS_CLASS_C_DEC::
  insert_value(const_reference r_val, false_type)
  {
    resize_for_insert_if_needed();
    pointer p_new = s_value_allocator.allocate(1);
    cond_dealtor_t cond(p_new);
    new (p_new) value_type(r_val);
    cond.set_no_action();
    m_a_entries[m_size++] = p_new;
  }
  
  PB_DS_CLASS_T_DEC
  inline void
  PB_DS_CLASS_C_DEC::
  resize_for_insert_if_needed()
  {
    if (!resize_policy::resize_needed_for_grow(m_size))
      {
        _GLIBCXX_DEBUG_ASSERT(m_size < m_actual_size);
        return;
      }
  
    const size_type new_size = resize_policy::get_new_size_for_grow();
    entry_pointer new_entries = s_entry_allocator.allocate(new_size);
    resize_policy::notify_grow_resize();
  
    std::copy(m_a_entries, m_a_entries + m_size, new_entries);
    s_entry_allocator.deallocate(m_a_entries, m_actual_size);
    m_actual_size = new_size;
    m_a_entries = new_entries;
    make_heap();
  }
  
  PB_DS_CLASS_T_DEC
  void
  PB_DS_CLASS_C_DEC::
  modify(point_iterator it, const_reference r_new_val)
  {
    PB_DS_ASSERT_VALID((*this))
    swap_value_imp(it.m_p_e, r_new_val, s_no_throw_copies_ind);
    fix(it.m_p_e);
    PB_DS_ASSERT_VALID((*this))
  }
  
  PB_DS_CLASS_T_DEC
  void
  PB_DS_CLASS_C_DEC::
  fix(entry_pointer p_e)
  {
    size_type i = p_e - m_a_entries;
    if (i > 0 && entry_cmp::operator()(m_a_entries[parent(i)], m_a_entries[i]))
      {
        size_type parent_i = parent(i);
        while (i > 0
  	     && entry_cmp::operator()(m_a_entries[parent_i], m_a_entries[i]))
  	{
  	  std::swap(m_a_entries[i], m_a_entries[parent_i]);
  	  i = parent_i;
  	  parent_i = parent(i);
  	}
  
        PB_DS_ASSERT_VALID((*this))
        return;
      }
  
    while (i < m_size)
      {
        const size_type lchild_i = left_child(i);
        const size_type rchild_i = right_child(i);
        _GLIBCXX_DEBUG_ASSERT(rchild_i > lchild_i);
  
        const bool smaller_than_lchild = lchild_i < m_size &&
  	entry_cmp::operator()(m_a_entries[i], m_a_entries[lchild_i]);
  
        const bool smaller_than_rchild = rchild_i < m_size &&
  	entry_cmp::operator()(m_a_entries[i], m_a_entries[rchild_i]);
  
        const bool swap_with_rchild = smaller_than_rchild && (!smaller_than_lchild || entry_cmp::operator()(m_a_entries[lchild_i], m_a_entries[rchild_i]));
  
        const bool swap_with_lchild = !swap_with_rchild && smaller_than_lchild;
  
        if (swap_with_lchild)
  	{
  	  std::swap(m_a_entries[i], m_a_entries[lchild_i]);
  	  i = lchild_i;
  	}
        else if (swap_with_rchild)
  	{
  	  std::swap(m_a_entries[i], m_a_entries[rchild_i]);
  	  i = rchild_i;
  	}
        else
  	i = m_size;
      }
  }
  
  PB_DS_CLASS_T_DEC
  inline void
  PB_DS_CLASS_C_DEC::
  swap_value_imp(entry_pointer p_e, value_type new_val, true_type)
  { *p_e = new_val; }
  
  PB_DS_CLASS_T_DEC
  inline void
  PB_DS_CLASS_C_DEC::
  swap_value_imp(entry_pointer p_e, const_reference r_new_val, false_type)
  {
    value_type tmp(r_new_val);
    (*p_e)->swap(tmp);
  }
  