headers and objects/classes

Hello

Im having headaches because I cant figure out what am I doing wrong.

Heres the code:


session.h:

Code:

#include "service.h"
#include "car.h"
#include "driver.h"

class session {
public:
	session();
	car const &car() const { return m_car; }
private:
	service m_service;
	car m_car;
	
	driver m_driver;
};

session.cpp:

Code:

#include "session.h"
session::session() : m_service(), m_car(m_service), m_driver(*this) {
}

car.h:

Code:

#include "service.h"
class car {
public:
	car(service &s) : m_service(s)  {
	}

	template <typename Handler>
	void somefunc(Handler t) {
	}
	
private:
	service &m_service;
};

driver.h:

Code:

#include "session.h"
class driver {
public:
	driver(session &s);
	
	do_stuff();
private:
	session m_session;
};

driver.cpp:

Code:

#include "driver.h"
#include "session.h"
#include "car.h"

driver::driver(session &s) : m_session(s) {
	do_stuff();
}

void driver::do_stuff() {
	m_session.car().somefunc(someclass);
}

The problem is that car in session class stays 'unknown'.
The error I get:
error C2146: syntax error : missing ';' before identifier 'm_car' .. etc.

How to solve this since I cannot make separated .cpp file for class car because its templated?

What exactly is the point of the session class? It seems to me that you can just provide the driver to the car, or vice versa. At the moment it looks like you are storing driver in session, and storing session in driver. That is... weird.

I renamed the classes. The point of the session class is that it stores data/objects for classes that are under session (multithreaded environment).

In other words..

Driver is being controlled by session class, and driver(s) need access to session class to read data and to call functions in car class (m_car).

The design seems good to me..