Determine if an io_service contains a specified service type.

template<
    typename Service>
friend 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.

Parameters

Return Value

A boolean indicating whether the io_service contains the service.

Requirements

Header: asio/io_service.hpp

Convenience header: asio.hpp