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#### io_context::make_service

Inherited from execution_context.

Creates a service object and adds it to the `execution_context`.

    template<
        typename Service,
        typename... Args>
    friend Service & make_service(
        execution_context & e,
        Args &&... args);

This function is used to add a service to the `execution_context`.

###### Parameters

e

  The `execution_context` object that owns the service.

args

  Zero or more arguments to be passed to the service constructor.

###### Exceptions

boost::asio::service_already_exists

  Thrown if a service of the given type is already present in the `execution_context`.

###### Requirements

Header: `boost/asio/io_context.hpp`

Convenience header: `boost/asio.hpp`