Changying Li <[email protected]> writes:
> in the guile manual:
> -- Scheme Procedure: format dest fmt [args...]
> Write output specified by the FMT string to DEST. DEST can be an
> output port, `#t' for `current-output-port' (*note Default
> Ports::), a number for `current-error-port', or `#f' to return the
> output as a string.
>
> what's the meaning of NUMBER?
> I want to write things to error port, so I write
> (format 1 "hello")
>
> standard input:5:1: In procedure simple-format in expression (format 1
> "hello"):
> standard input:5:1: Wrong type argument in position 1: 1
> ABORT: (wrong-type-arg)
You need to add (use-modules (ice-9 format)) to your code, to get the
full implementation of `format'. Then the "number means
current-error-port" thing should work.
At the moment, you're actually using `simple-format'.
> Is there something wrong in the guile manual ?
I don't think so, because the documentation that you cited comes from a
section that begins by saying that
"This function is available from
(use-modules (ice-9 format))"
Regards,
Neil
