### io_context::work

(Deprecated: Use `executor_work_guard`.) Class to inform the `io_context` when it has work to do.

    class work

##### Member Functions

Name | Description
--- | ---
get_io_context | Get the io_context associated with the work.
get_io_service | (Deprecated: Use get_io_context().) Get the io_context associated with the work.
work | Constructor notifies the io_context that work is starting. Copy constructor notifies the io_context that work is starting.
~work | Destructor notifies the io_context that the work is complete.

The work class is used to inform the `io_context` when work starts and finishes. This ensures that the `io_context` object's `run()` function will not exit while work is underway, and that it does exit when there is no unfinished work remaining.

The work class is copy-constructible so that it may be used as a data member in a handler class. It is not assignable.

##### Requirements

Header: `asio/io_context.hpp`

Convenience header: `asio.hpp`