- bool advance_route(std::list<RouteRef>::iterator &, const Track &);
- Route *create_lead_route();
- bool is_valid_diversion(const Route &, const Track &, unsigned);
+ bool advance_route(std::list<RouteRef>::iterator &, Track &);
+ Route *create_lead_route(Route *, const Route *);
+ bool is_valid_diversion(const Route &, Track &, unsigned);