I am trying to call the function doublylinkedlist::const std::s& getData() from the class doublylinkedlist but I am getting the error "error: expected unqualified-id before const

doublylinkedlist::const std::s& getData()". I need to call the function because I am using a separate cpp from my header file to compile. I am doing this in c++.

#ifndef __DOUBLYLINKEDLIST_H__ #define __DOUBLYLINKEDLIST_H__ // // #include #include using namespace std; template class doublylinkedlist { public: doublylinkedlist(); ~doublylinkedlist(); void append (s& data); void insertBefore (s& data); void insertAfter (s& data); void remove (s& data); bool empty(); void begin(); void end(); bool next(); bool prev(); bool find(s& data); const std::string& getData() const;

private: class Node { public: string *data; Node(const s &data); ~Node(); Node* next; Node* prev; }; Node* head; Node* tail; Node* current; };

template doublylinkedlist::const std::s& getData() {

}

#endif