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- To: firstname.lastname@example.org
- Subject: Practical (values)
- From: mcvax!lifia!phs@seismo.CSS.GOV (Philippe Schnoebelen)
- Date: Fri, 27 Mar 87 09:09:11 -0200
I am always wondering about the multiple-values feature of CommonLisp,
more specially the possibility of returning NO values, through a (VALUES)
Very often one defines a function which does not return any informative
value (at least it is only meant to have a side effect, but the value that
happens to be returned should be irrelevant). This is a situation where I
am tempted to put a (VALUES) form a the end of the function body. It is
certainly cleaner and it should not compile into less efficient code, at
least "there is no reason why it should give worse code" (the usual
incantation). Yes, but practically ?
Could someone give me (us) explanations about this ? How is it usually
implemented ? Is it more, less, equally efficient ? Only in connection with
(OPTIMIZE ...) declarations ? (TYPE ...) declarations ?
LIFIA - IMAG, BP 68 UUCP : ...mcvax!imag!lifia!phs
38402 Saint Martin d'Heres, FRANCE
"Algebraic symbols are used when you do not know what you are talking about."