Tools.h++ Class Reference

Objects within the collection will be grouped together based on an equality object of type EQ.
EQ must ensure this grouping via public member
bool operator()(const T& x, const T& y) const
which should return true if x and y are equivalent, false otherwise.
RWTValHashSet<T,H,EQ> will not accept an item that compares equal to an item already in the
collection. (RWTValHashMultiSet<T,H,EQ> may contain multiple items that compare equal to
each other.) Equality is based on the equality object and not on the == operator.
Persistence
Isomorphic
Example
//
// tvhsstr.cpp
//
#include <rw/tvhset.h>
#include <rw/cstring.h>
#include <iostream.h>
struct silly_hash{
unsigned long operator()(RWCString x) const
{ return x.length() * (long)x(0); }
};
main(){
RWTValHashSet<RWCString,silly_hash,equal_to<RWCString> > set1;
RWTValHashSet<RWCString,silly_hash,equal_to<RWCString> > set2;
set1.insert("one");
set1.insert("two");
set1.insert("three");
//Rejected, no duplicates allowed
set1.insert("one");
cout << set1.entries() << endl; // Prints "3"
set2.insert("one");
set2.insert("five");
//Rejected, no duplicates allowed