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Function OPEN-STREAM-P

Syntax

  • open-stream-p streamgeneralized-boolean

Arguments and Values

Description

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

Streams are open until they have been explicitly closed with close, or until they are implicitly closed due to exit from a with-output-to-string, with-open-file, with-input-from-string, or with-open-stream form.

Examples

(open-stream-p *standard-input*) → true

Side Effects

None.

Affected By

Exceptional Situations

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

See Also

None.

Notes

None.

\issue{STREAM-ACCESS:ADD-TYPES-ACCESSORS}