OneItemOutputIterator.h

 
#pragma once

 
#if defined(OneItemOutputIterator_RECURSES)
#error Recursive header files inclusion detected in OneItemOutputIterator.h
#else // defined(OneItemOutputIterator_RECURSES)
#define OneItemOutputIterator_RECURSES
 
#if !defined OneItemOutputIterator_h
#define OneItemOutputIterator_h

// Inclusions
#include <iostream>
#include "DGtal/base/Common.h"
 
namespace DGtal
{

  // template class OneItemOutputIterator
  template <typename T>
  class OneItemOutputIterator//: public std::iterator<std::output_iterator_tag,void,void,void,void>
  {
 
  public:
    using iterator_category = std::output_iterator_tag;
    using value_type = void;
    using difference_type = void;
    using pointer = void;
    using reference = void;
 
 
    BOOST_CONCEPT_ASSERT(( boost::DefaultConstructible<T> ));
    BOOST_CONCEPT_ASSERT(( boost::CopyConstructible<T> ));
    BOOST_CONCEPT_ASSERT(( boost::Assignable<T> ));
 
    // ----------------------- Standard services ------------------------------
  public:

    OneItemOutputIterator(): myItemPtr(NULL)
    {
      myItemPtr = new T();
    }

    OneItemOutputIterator(const OneItemOutputIterator& other): myItemPtr(other.myItemPtr) {}
 
    // ----------------------- Interface --------------------------------------
  public:

    inline OneItemOutputIterator& operator=(const T& aItem)
    {
      ASSERT( isValid() );
      *myItemPtr = aItem;
      return *this;
    }

    inline OneItemOutputIterator& operator*() { return *this; }

    inline OneItemOutputIterator& operator++() { return *this; }

    inline OneItemOutputIterator operator++(int) { return *this; }

    inline T get() const
    {
      ASSERT( isValid() );
      return *myItemPtr;
    }

    inline bool isValid() const { return (myItemPtr != NULL); }
 
    // ------------------------- Private Data --------------------------------
  private:
    T* myItemPtr;
 
  }; // end of class OneItemOutputIterator
 
 
} // namespace DGtal
 

// Includes inline functions.
//#include "DGtal/base/OneItemOutputIterator.ih"
 
//                                                                           //
 
#endif // !defined OneItemOutputIterator_h
 
#undef OneItemOutputIterator_RECURSES
#endif // else defined(OneItemOutputIterator_RECURSES)