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newlispfanclub.alh.net • View topic - In-place parameter substitution
Page 1 of 1

In-place parameter substitution

PostPosted: Thu Apr 12, 2012 4:10 pm
by genghis
Hi, is it possible to create a user-defined function much like what inc does: in-place parameter substitution, or is this only available for built-in functions?

Where do newLISPers hangout? Is there a #newlisp IRC channel somewhere?

Re: In-place parameter substitution

PostPosted: Thu Apr 12, 2012 4:45 pm
by Lutz
There is a chapter about this on this page:

http://www.newlisp.org/index.cgi?Closures

look for "Stateful functions using in-place modification: at the end.

Re: In-place parameter substitution

PostPosted: Thu Apr 12, 2012 5:08 pm
by genghis

Re: In-place parameter substitution

PostPosted: Sat Apr 14, 2012 12:43 am
by Kazimir Majorinc
How about this one for beginning:

(define-macro (myinc p0)(set p0 (+ (eval p0) 1)))

Re: In-place parameter substitution

PostPosted: Sat Apr 14, 2012 6:49 am
by genghis

Re: In-place parameter substitution

PostPosted: Sat Apr 14, 2012 2:29 pm
by Lutz

Re: In-place parameter substitution

PostPosted: Sat Apr 14, 2012 3:19 pm
by Kazimir Majorinc
It would be nice to have some function that returns list of the caller functions, similarly like (sys-info 3) returns the level of recursion. Although it sounds quite 'dangerous' it can actually provide some debugging facilities, i.e. functions could react if called by someone they do not appreciate.

Re: In-place parameter substitution

PostPosted: Sun Apr 15, 2012 8:21 am
by tumble

Re: In-place parameter substitution

PostPosted: Sun Apr 15, 2012 2:43 pm
by Lutz