Template problem

[benjamin . bihler]

Hi,

I am trying to create a wrapper class for hash_sets. I would like to
use templates for the type of data that is stored in the hash_set, but
I get a strange compiler error. Everything works, if I don't use
templates. But with templates I get with g++ 4.1.2:

../TWTHashSet.h:42: error: type '__gnu_cxx::hash_set<PointerTemplate*,
CTWTHashSet<PointerTemplate>::pointerHashFunction,
CTWTHashSet<PointerTemplate>::pointerEquality,
std::allocator<PointerTemplate*> >' is not derived from type
'CTWTHashSet<PointerTemplate>'
../TWTHashSet.h:42: error: expected ';' before 'hash_setIterator'



I do not understand the error message. Could someone explain, what I
am doing wrong, or how I can solve that problem?


Thank you very much,
Benjamin Bihler




Source code:



TWTHashSet.cpp:

#include "TWTHashSet.h"

template< class PointerTemplate >

CTWTHashSet< PointerTemplate >::CTWTHashSet()
{
}

template< class PointerTemplate >

CTWTHashSet< PointerTemplate >::~CTWTHashSet()
{}




TWTHashSet.h:

#ifndef TWTHASHSET_H_
#define TWTHASHSET_H_

#include <ext/hash_set>

template< class PointerTemplate >


class CTWTHashSet
{

public:

    CTWTHashSet();
    ~CTWTHashSet();
    class pointerEquality;
    class pointerHashFunction;


    class pointerEquality
    {
    public:

        bool operator()(const PointerTemplate *s1, const
PointerTemplate *s2) const
        {
            return (s1 == s2);
        }
    };

    class pointerHashFunction
    {
    public:

        size_t
        operator()(const PointerTemplate *__x) const
        {
            return ( size_t )__x;
        }
    };

    __gnu_cxx::hash_set< PointerTemplate*, pointerHashFunction,
pointerEquality, std::allocator< PointerTemplate* > > hsDreieckSet;
    __gnu_cxx::hash_set< PointerTemplate*, pointerHashFunction,
pointerEquality, std::allocator< PointerTemplate* > >::iterator
hash_setIterator;



};

#endif /*TWTHASHSET_H_*/