On 3 Dec 2010, at 13:34, Martin Simmons wrote: > I think it is confusing to use (values) for that purpose, because "no values" > is also a valid return value (e.g. for reader macro functions > http://www.lispworks.com/documentation/HyperSpec/Body/02_add.htm). > > I would make it a macro, called something like void. > > OTOH, use of (values) or (void) will prevent tail call optimization, so may be > undesirable.
I think this is the strongest argument in this thread: Most other arguments seem to point out only subjective and/or stylistic issues, while this one is a hard technical difference. Preventing tail call optimizations for stylistic issues is a bad idea, IMHO. I have occasionally used the (values) idiom, but only in test situations, when I don't like seeing return values in the REPL. I seem to recall some uses of (values) in PCL. Pascal -- Pascal Costanza, mailto:p...@p-cos.net, http://p-cos.net Vrije Universiteit Brussel Software Languages Lab Pleinlaan 2, B-1050 Brussel, Belgium _______________________________________________ pro mailing list pro@common-lisp.net http://common-lisp.net/cgi-bin/mailman/listinfo/pro
