Enumerator.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2022 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
/*---------------------------------------------------------------------------*/
/* Enumerator.h                                                (C) 2000-2022 */
/*                                                                           */
/* Enumérateurs.                                                             */
/*---------------------------------------------------------------------------*/
#ifndef ARCANE_ENUMERATOR_H
#define ARCANE_ENUMERATOR_H
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
#include "arcane/utils/ObjectImpl.h"
#include "arcane/utils/AutoRef.h"
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
namespace Arcane
{
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
class ARCANE_UTILS_EXPORT EnumeratorImplBase
: public ObjectImpl
{
 public:
 
  virtual void reset() = 0;
  virtual bool moveNext() = 0;
  virtual void* current() = 0;
  virtual const void* current() const = 0;
 
 private:
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
class ARCANE_UTILS_EXPORT EnumeratorBase
{
 public:
 
  EnumeratorBase() = default;
 
  explicit EnumeratorBase(EnumeratorImplBase* impl)
  : m_impl(impl)
  {}
 
 public:
 
  void reset() { m_impl->reset(); }
  bool moveNext() { return m_impl->moveNext(); }
  void* current() { return m_impl->current(); }
  const void* current() const { return m_impl->current(); }
 
 public:
 
  bool operator++() { return moveNext(); }
 
 protected:
 
  EnumeratorImplBase* _impl() { return m_impl.get(); }
  const EnumeratorImplBase* _impl() const { return m_impl.get(); }
 
 private:
 
  AutoRefT<EnumeratorImplBase> m_impl; 
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
template <class T>
class EnumeratorT
: public EnumeratorBase
{
 public:
 
  EnumeratorT() = default;
  EnumeratorT(const Collection<T>& collection);
  explicit EnumeratorT(EnumeratorImplBase* impl)
  : EnumeratorBase(impl)
  {}
 
 public:
 
  const T& current() const { return *_currentPtr(); }
  T& current() { return *_currentPtr(); }
 
 public:
 
  const T& operator*() const { return current(); }
  T& operator*() { return current(); }
  const T* operator->() const { return _currentPtr(); }
  T* operator->() { return _currentPtr(); }
 
 private:
 
  T* _currentPtr()
  {
    return reinterpret_cast<T*>(_impl()->current());
  }
  const T* _currentPtr() const
  {
    return reinterpret_cast<const T*>(_impl()->current());
  }
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template <class T> inline EnumeratorT<T>::
EnumeratorT(const Collection<T>& collection)
: EnumeratorBase(collection.enumerator())
{
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
} // namespace Arcane
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
#endif