...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Obtain the service object corresponding to the given type.
template< typename Service> friend Service & use_service( io_service & ios);
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_service will create a new instance of the service.
The io_service object that owns the service.
The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller.