chickadee » srfi-40 » stream?

stream? objectprocedure

stream? returns #t if the object is a stream, and otherwise returns #f. A stream object may be either the null stream or a stream pair created by stream-cons.

(stream? stream-null)                       => #t
(stream? (stream-cons 'a stream-null))      => #t
(stream? 3)                                 => #f