Movatterモバイル変換

Syntax:

input-stream-pstream =>generalized-boolean

output-stream-pstream =>generalized-boolean

Arguments and Values:

stream---astream.

generalized-boolean---ageneralized boolean.

Description:

input-stream-p returnstrue ifstream is aninputstream; otherwise, returnsfalse.

output-stream-p returnstrue ifstream is anoutputstream; otherwise, returnsfalse.

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

Side Effects: None.

Affected By: None.

Exceptional Situations:

Should signal an error oftypetype-error ifstream is not astream.

See Also: None.

Notes: None.