21.2.19 terpri, fresh-line [Function]

terpri &optional output-stream ⇒ nil

fresh-line &optional output-stream ⇒ generalized-boolean

Arguments and Values::

output-stream – an output stream designator. The default is standard output.

generalized-boolean—a generalized boolean.

Description::

terpri outputs a newline to output-stream.

fresh-line is similar to terpri but outputs a newline only if the output-stream is not already at the start of a line. If for some reason this cannot be determined, then a newline is output anyway. fresh-line returns true if it outputs a newline; otherwise it returns false.

Examples::

 (with-output-to-string (s)
    (write-string "some text" s)
    (terpri s)
    (terpri s)
    (write-string "more text" s))
⇒  "some text

more text"
 (with-output-to-string (s)
    (write-string "some text" s)
    (fresh-line s)
    (fresh-line s)
    (write-string "more text" s))
⇒  "some text
more text"

Side Effects::

The output-stream is modified.

Affected By::

*standard-output*, *terminal-io*.

Exceptional Situations::

None.

[Reviewer Note by Barmar: What if stream is closed?]

Notes::

terpri is identical in effect to

 (write-char #\Newline output-stream)