make-broadcast-stream &rest streams => broadcast-stream
Arguments and Values:
stream---an output stream.
broadcast-stream---a broadcast stream.
Returns a broadcast stream.
(setq a-stream (make-string-output-stream) b-stream (make-string-output-stream)) => #<String Output Stream> (format (make-broadcast-stream a-stream b-stream) "this will go to both streams") => NIL (get-output-stream-string a-stream) => "this will go to both streams" (get-output-stream-string b-stream) => "this will go to both streams"
Side Effects: None.
Affected By: None.
Should signal an error of type type-error if any stream is not an output stream.