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#### posix::stream_descriptor::wait_type

Inherited from posix::descriptor.

Wait types.

    enum wait_type

###### Values

wait_read

  Wait for a descriptor to become ready to read.

wait_write

  Wait for a descriptor to become ready to write.

wait_error

  Wait for a descriptor to have error conditions pending.

For use with `descriptor::wait()` and `descriptor::async_wait()`.