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##### posix::basic_descriptor::basic_descriptor (2 of 2 overloads)

Construct a basic_descriptor on an existing native descriptor.

    basic_descriptor(
        boost::asio::io_service & io_service,
        const native_type & native_descriptor);

This constructor creates a descriptor object to hold an existing native descriptor.

###### Parameters

io_service

  The io_service object that the descriptor will use to dispatch handlers for any asynchronous operations performed on the descriptor.

native_descriptor

  A native descriptor.

###### Exceptions

boost::system::system_error

  Thrown on failure.