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21.2.10 interactive-stream-p [Function]

interactive-stream-p streamgeneralized-boolean

Arguments and Values::

stream—a stream.

generalized-boolean—a generalized boolean.

Description::

Returns true if stream is an interactive stream; otherwise, returns false.

Examples::
      (when (> measured limit)
        (let ((error (round (* (- measured limit) 100)
                            limit)))
          (unless (if (interactive-stream-p *query-io*)
                      (yes-or-no-p "The frammis is out of tolerance by ~D
                                    Is it safe to proceed? " error)
                      (< error 15))  ;15
            (error "The frammis is out of tolerance by ~D
Exceptional Situations::

Should signal an error of type type-error if stream is not a stream.

See Also::

Stream Concepts