Obtain the service object corresponding to the given type.
template< typename Service> friend Service & use_service( io_context & ioc);
This function is used to locate a service object that corresponds to
the given service type. If there is no existing implementation of the
service, then the
io_context will create a new
instance of the service.
io_context object that
owns the service.
The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller.
This overload is preserved for backwards compatibility with services
that inherit from