CCuddFirstIter.h

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// -*- c++ -*-
//*****************************************************************************
//*****************************************************************************

#ifndef polybori_iterators_CCuddFirstIter_h_
#define polybori_iterators_CCuddFirstIter_h_

// include basic definitions
#include "CCuddNavigator.h"

// include boost's interator facade
#include <boost/iterator/iterator_facade.hpp>

BEGIN_NAMESPACE_PBORI

class CCuddFirstIter : 
  public boost::iterator_facade<
  CCuddFirstIter,
  CCuddNavigator::value_type,
  std::forward_iterator_tag,
  CCuddNavigator::reference
  > {

public:

  typedef std::forward_iterator_tag iterator_category;

  typedef CCuddFirstIter self;

  typedef CCuddNavigator navigator;

  typedef navigator::const_access_type const_access_type;

  typedef navigator::bool_type bool_type;

  CCuddFirstIter(): m_navi() {}

  CCuddFirstIter(navigator rhs): m_navi(rhs) { terminateConstant(); }

  ~CCuddFirstIter() {}

  void increment() {
    m_navi.incrementThen();
    terminateConstant();
  }

  bool_type equal (const self& rhs) const { return (m_navi == rhs.m_navi); }

  navigator::reference dereference() const { return *m_navi; }

  bool_type isEnd() const { return !m_navi.isValid(); }

protected:
  void terminateConstant() {
    if (m_navi.isConstant()) 
      *this = self();           // mark end of path reached

  }

  navigator m_navi;
};

END_NAMESPACE_PBORI

#endif

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