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ANSI Common Lisp 21 Streams 21.2 Dictionary of Streams
21.2.10 interactive-stream-p |
Function |
- Syntax:
-
interactive-stream-p
stream
generalized-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% is acceptable
(error "The frammis is out of tolerance by ~D%." error))))
- Exceptional Situations:
-
Should signal an error of type type-error if stream is not a stream.
- See Also:
-
Section 21.1 Stream Concepts
- Allegro CL Implementation Details:
-
See Extensions
to cl:interactive-stream-p
in implementation.htm for information on the Allegro CL implementation. Note
the links are to the documentation for the current Allegro CL
version. Replace /current/ in the URL with the Allegro CL version
number to see similar documentation is earlier releases.
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