SimpleConstRange.h

#pragma once

#if defined(SimpleConstRange_RECURSES)
#error Recursive header files inclusion detected in SimpleConstRange.h
#else // defined(SimpleConstRange_RECURSES)

#define SimpleConstRange_RECURSES

#if !defined SimpleConstRange_h

#define SimpleConstRange_h

// Inclusions
#include <iterator>
#include <iostream>
#include "DGtal/base/BasicFunctors.h"
#include "DGtal/base/Circulator.h"
#include "DGtal/base/ConstIteratorAdapter.h"
#include "boost/concept_check.hpp"

namespace DGtal
{


  // class SimpleConstRange

  template <typename TConstIterator>
  class SimpleConstRange
  {

    BOOST_CONCEPT_ASSERT(( boost::BidirectionalIterator<TConstIterator> ));

    // ------------------------- inner types --------------------------------
  public:

    typedef TConstIterator ConstIterator;
    typedef std::reverse_iterator<ConstIterator> ConstReverseIterator;

    typedef Circulator<ConstIterator> ConstCirculator;
    typedef std::reverse_iterator<ConstCirculator> ConstReverseCirculator;

    // ------------------------- standard services --------------------------------

    SimpleConstRange(const TConstIterator& itb, const TConstIterator& ite)
      : myBegin(itb), myEnd(ite) {}

    SimpleConstRange( const SimpleConstRange & other )
      : myBegin(other.myBegin), myEnd(other.myEnd) {}

    SimpleConstRange& operator= ( const SimpleConstRange & other )
    {
      if ( this != &other )
        {
          myBegin = other.myBegin;
          myEnd = other.myEnd;
        }
      return *this;
    }

    ~SimpleConstRange() {}

    bool isValid() const { return true; }

    // ------------------------- display --------------------------------
    void selfDisplay ( std::ostream & out ) const
    {
      typedef typename IteratorCirculatorTraits<ConstIterator>::Value Value;
      out << "[SimpleConstRange]" << std::endl;
      out << "\t";
      std::copy( myBegin, myEnd, std::ostream_iterator<Value>(out, ", ") );
      out << std::endl;
    }

    std::string className() const
    {
      return "SimpleConstRange";
    }


    // ------------------------- private data --------------------------------
  private:
    TConstIterator myBegin;
    TConstIterator myEnd;

    // ------------------------- iterator services --------------------------------
  public:

    ConstIterator begin() const {
      return ConstIterator( myBegin );
    }

    ConstIterator end() const {
      return ConstIterator( myEnd );
    }

    ConstReverseIterator rbegin() const {
      return ConstReverseIterator(this->end());
    }

    ConstReverseIterator rend() const {
      return ConstReverseIterator(this->begin());
    }

    ConstCirculator c() const {
      return ConstCirculator( this->begin(), this->begin(), this->end() );
    }

    ConstReverseCirculator rc() const {
      return ConstReverseCirculator( this->c() );
    }

  }; //end class SimpleConstRange

} // namespace DGtal



#endif // !defined SimpleConstRange_h

#undef SimpleConstRange_RECURSES
#endif // else defined(SimpleConstRange_RECURSES)