Template & iterator Problem

[hellori]

Hi all, I have a question about passing iterators to a function. I want to create a function that does something with STL container iterators. The container of the iterator can vary, so I use a template container there. Here is the code:

template <class Container, class T>
void do_sth(typename Container<T>::iterator &start, typename Container<T>::iterator &end, T &elem)
{
  //Some code here
}
 

I get compilation error (unrecognizable template declaration/definition) in MS VC++ 8.0.
Helps would be appreciated. Thanks...

[weaknessforcats]

You can pass iterators to a function but what you can't do is use the typename in a template as thougfh it were a class member.

This is OK:

template<class T>
class Container
{
     T thedata;
public:
    class iterator
    {
        void AMethod();
 
    };
};
template <class T>
void Container<T>::iterator::AMethod()
{
 
}
 

Here the syntax Container<T>::iterator is used to identify a member function of Container<T>. Unless you are writing a member function you can't use this syntax.

What you should code is:

template < class T, class U>
void do_sth(U& start, U& end, T elem)
{
  //Some code here
}
 
//and in main():
 
int main()
{
  Container<int> c;
  Container<int>::iterator itr;
  do_sth(itr, itr, 5);
}
 

[hellori]

Thanks a lot, that solved my problem.