boost::shared_ptr and NULL

In this function declaration, is there a simpler way to express a null shared pointer as the default argument value? void foo( const boost::shared_ptr<T> & p = boost::shared_ptr<T>( ) ); In this function call, is there a simpler way to express a null shared pointer as the actual argument? foo( boost::shared_ptr<T>( ) ); ----------------------------------------------------------------------- Andrew R. Thomas-Cramer Work: artc@prism-cs.com http://www.prism-cs.com/ Home: artc@execpc.com http://www.execpc.com/~artc/ ----------------------------------------------------------------------- [Non-text portions of this message have been removed]