ItemGroupRangeIterator.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* ItemGroupRangeIterator.h                                    (C) 2000-2025 */
/*                                                                           */
/* Iteration range over the entities of a mesh group.                        */
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#ifndef ARCANE_CORE_ITEMGROUPRANGEITERATOR_H
#define ARCANE_CORE_ITEMGROUPRANGEITERATOR_H
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#include "arcane/core/ItemInfoListView.h"
#include "arcane/core/Item.h"
 
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namespace Arcane
{
 
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/*!
 * \brief Iterator over the elements of a group.
 */
class ARCANE_CORE_EXPORT ItemGroupRangeIterator
{
 public:
 
  typedef ItemInternal* ItemPtr;
  typedef ItemPtr* Iterator;
 
  ItemGroupRangeIterator(const ItemGroup& group);
  ItemGroupRangeIterator();
 
 public:
 
  inline void operator++()
  {
    ++m_current;
  }
  inline bool hasNext() const
  {
    return m_current < m_end;
  }
  inline Integer itemLocalId() const
  {
    return m_items_local_ids[m_current];
  }
  inline Integer index() const
  {
    return m_current;
  }
  inline eItemKind kind() const
  {
    return m_kind;
  }
 
 protected:
 
  eItemKind m_kind;
  Integer m_current;
  Integer m_end;
  const Int32* ARCANE_RESTRICT m_items_local_ids;
  ItemInfoListView m_items;
};
 
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/*!
 * \brief Iteration range over a group of mesh entities.
 */
template <typename T>
class ItemGroupRangeIteratorT
: public ItemGroupRangeIterator
{
 public:
 
  inline ItemGroupRangeIteratorT(const ItemGroup& group)
  : ItemGroupRangeIterator(group)
  {
  }
  inline ItemGroupRangeIteratorT()
  : ItemGroupRangeIterator()
  {
  }
 
 public:
 
  T operator*() const
  {
    return T(m_items[m_items_local_ids[m_current]]);
  }
};
 
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} // namespace Arcane
 
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#endif