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RWTPtrHashSetIterator<T,H,EQ>

Data Type and Member Function Indexes
(exclusive of constructors and destructors)

Synopsis

#include<rw/tphset.h>
RWTPtrHashSet<T,H,EQ> m;
RWTPtrHashSet<T,H,EQ> itr(m); 

Please Note!


If you have the Standard C++ Library, use the interface described here. Otherwise, use the restricted interface to RWTPtrHashTableIterator described in Appendix A. (When Tools.h++ is used without the Standard C++ Library, RWTPtrHashSetIterator is defined by RWTPtrHashTableIterator.)


Description

RWTPtrHashSetIterator is supplied with Tools.h++ 7.x to provide an iterator interface to the Standard Library based collections that has backward compatibility with the container iterators provided in Tools.h++ 6.x.

Iteration over an RWTPtrHashSet is pseudorandom and dependent on the capacity of the underlying hash table and the hash function being used.

The current item referenced by this iterator is undefined after construction or after a call to reset(). The iterator becomes valid after being advanced with either a pre-increment or an operator().

For both operator++ and operator(), iterating past the last element will return a value equivalent to boolean false. Continued increments will return a value equivalent to false until reset() is called.

The value type must have operator== defined. This requirement is imposed by the Standard C++ Library.

Persistence

None

Examples

#include<rw/tphset.h>
#include<iostream.h>
#include<rw/cstring.h>

struct silly_h{
   unsigned long operator()(RWCString x) const
     { return x.length() * (long)x(0); }
};
int main(){
   RWTPtrHashSet <RWCString,silly_h,equal_to<RWCString> > age;
   RWTPtrHashSetIterator
     <RWCString,silly_h,equal_to<RWCString> > itr(age);
   age.insert(new RWCString("John"));
   age.insert(new RWCString("Steve"));
   age.insert(new RWCString("Mark"));
//Duplicate insertion is rejected
   age.insert(new RWCString("Steve"));
   for(;++itr;) cout << *itr.key() << endl;
   return 0;
}
Program Output (not necessarily in this order)
John
Mark
Steve

Public Constructors

RWTPtrHashSetIterator<T,H,EQ>(RWTPtrHashSet<T,H,EQ>&h);

Public Member Operators

T*
operator()();
RWBoolean
operator++();

Public Member Functions

RWTPtrHashSet<T,H,EQ>*
container() const; 
T*
key() const; 
void
reset();
void
reset(RWTPtrHashSet<T,H,EQ>& h);


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