##### system_context::use_service (2 of 2 overloads)

Inherited from execution_context.

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.

###### Parameters

ioc

  The `io_context` object that owns the service.

###### Return Value

The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller.

###### Remarks

This overload is preserved for backwards compatibility with services that inherit from `io_context::service`.

###### Requirements

Header: `asio/system_context.hpp`

Convenience header: `asio.hpp`