IteratorFunctions.h

#pragma once

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

#define IteratorFunctions_RECURSES

#if !defined IteratorFunctions_h

#define IteratorFunctions_h

// Inclusions
#include<iterator>


namespace DGtal
{

  // template functions isNotEmpty

namespace detail {

  template< typename IC > 
  inline
  bool isNotEmpty( const IC& itb, const IC& ite, IteratorType ) {
    return (itb != ite);
  }

  template< typename IC > 
  inline
  bool isNotEmpty( const IC& c1, const IC& c2, CirculatorType) {
// using isValid method does not work with reverse circulator 
//(generally speaking adapters of circulators that does not have any isValid method)
//    return ( ( c1.isValid() ) && ( c2.isValid() ) );  
    IC c; //c is not valid
    return ( (c1 != c) && (c2 != c) ); 
  }

} 

template< typename IC> 
inline
bool isEmpty( const IC& itb, const IC& ite ){
  return !detail::isNotEmpty<IC>( itb, ite, typename IteratorCirculatorTraits<IC>::Type() );
}

template< typename IC> 
inline
bool isNotEmpty( const IC& itb, const IC& ite ){
  return detail::isNotEmpty<IC>( itb, ite, typename IteratorCirculatorTraits<IC>::Type() );
}
  
} // namespace DGtal




// Includes inline functions.
//#include "DGtal/base/IteratorFunctions.ih"

//                                                                           //

#endif // !defined IteratorFunctions_h

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