Question

g++ compiler gives this error: expected `;’ before ‘it’

template <typename T>
class myList : public std::list<T>
{   
public:

  void foo () 
  { 
    std::list<T>::iterator it;       // compiler error as above mentioned, why ???
  }
};

Thanks.

Answer 1

In g++. whenever in a template you see the error:

error: expected ';' before 'it'

suspect you need a typename:

typename std::list<T>::iterator it;  

This is needed when in a template you have a new type declared (in this case the list iterator) which is dependant on one or more of the template parameters. The need is not unique to g++ BTW, it’s part of standard C++.