...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
template< typename Service> bool has_service( io_service & ios);
This function is used to determine whether the io_service
contains a service object
corresponding to the given service type.
The io_service
object that owns the service.
A boolean indicating whether the io_service
contains the service.
Header: boost/asio/io_service.hpp
Convenience header: boost/asio.hpp