| |
ANSI Common Lisp  21 Streams 21.2 Dictionary of Streams
| 21.2.9 input-stream-p, output-stream-p |
Function |
- Syntax:
-
input-stream-p
stream
 generalized-boolean
output-stream-p
stream
generalized-boolean
- Arguments and Values:
-
stream - a stream.
generalized-boolean - a generalized boolean.
- Description:
-
input-stream-p returns true if stream is an input stream; otherwise, returns false.
output-stream-p returns true if stream is an output stream; otherwise, returns false.
- Examples:
-
(input-stream-p *standard-input*) true
(input-stream-p *terminal-io*) true
(input-stream-p (make-string-output-stream)) false
(output-stream-p *standard-output*) true
(output-stream-p *terminal-io*) true
(output-stream-p (make-string-input-stream "jr")) false
- Exceptional Situations:
-
Should signal an error of type type-error if stream is not a stream.
- Allegro CL Implementation Details:
-
None.
|
