prio_impl.h

This software was done in part for a textbook on AI I ve written called _The Basis of AI_ (tentative

/*******************************************************************************
+
+  LEDA 3.5
+
+
+  prio_impl.h
+
+
+  Copyright (c) 1995, 1996, 1997  by  LEDA Software GmbH
+  Postfach 151101, 66041 Saarbruecken, Germany
+  All rights reserved.
+ 
*******************************************************************************/



class __exportC PRIO_IMPL
{ 

private:

PRIO_IMPL_DATA

virtual int  key_type_id() const = 0;

virtual int  cmp(GenPtr, GenPtr) const = 0;
virtual void clear_key(GenPtr&)  const = 0;
virtual void clear_inf(GenPtr&)  const = 0;
virtual void copy_key(GenPtr&)   const = 0;
virtual void copy_inf(GenPtr&)   const = 0;


protected:

 typedef PRIO_IMPL_ITEM item;

public:

 PRIO_IMPL();
 PRIO_IMPL(int);
 PRIO_IMPL(int,int);
 PRIO_IMPL(const PRIO_IMPL&);
virtual ~PRIO_IMPL();

PRIO_IMPL& operator=(const PRIO_IMPL&);

PRIO_IMPL_ITEM insert(GenPtr,GenPtr);
PRIO_IMPL_ITEM find_min() const;
PRIO_IMPL_ITEM first_item() const;
PRIO_IMPL_ITEM next_item(PRIO_IMPL_ITEM) const;

GenPtr key(PRIO_IMPL_ITEM) const;
GenPtr inf(PRIO_IMPL_ITEM) const;

void del_min();
void del_item(PRIO_IMPL_ITEM);
void decrease_key(PRIO_IMPL_ITEM,GenPtr);
void change_inf(PRIO_IMPL_ITEM,GenPtr);
void clear();
 
int  size()  const;

};