Templates and Iterators

[card]

Hi everyone,

Can anybody explain why this won't build and what the error is? The error is with the list iterator in the TestClass class. Basically, I have a two templated classes, Item and TestClass. TestClass uses Item to define on of its template parameters.

#include <iostream>
#include <string>
#include <vector>
#include <list>
#include "test.h"
 
using std::vector;
using std::string;
using std::list;
 
template<class Key, class Element>
class Item
{
private:
    Key _key;
    Element _element;
};
 
template<class Key, class Element, class Entry=Item<Key,Element> >
class TestClass
{
private:
    list<Entry>::iterator  myIter;
};
 
int main(int argc, char *argv[])
{
    vector< list<TestClass<string, int> > > _v;
    list<TestClass<string, int> >::iterator _it;
 
    return 0;
}
 
 

The build error using g++ 4.2.3 is:

test.C:33: error: type ‘std::list<Entry, std::allocator<_Tp> >’ is not derived from type ‘TestClass<Key, Element, Entry>’
test.C:33: error: expected ‘;’ before ‘myIter’

I can't figure this one out. Many thanks.

-David

[newb16]

I have no idea if it is working, but at least it compiles ( when i removed include "test.h" line )

typename list<Entry>::iterator  myIter; 
 

[card]

Yeah, sorry about leaving the "test.h" include in there. Thanks for the reply. Works great.