Why do we need typename here?

Question

template
class Set 
{
public:
   void insert(const T& item);
   void remove(const T& item);
private:
   std::list rep;
}

template<         


        

Answer 1

typename is needed in your declaration of 'it' because otherwise the compiler doesn't know that it's a type declaration rather than an expression.

According to this page, "Use the keyword typename if you have a qualified name that refers to a type and depends on a template parameter."