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Re: wrapper functions [message #50633 is a reply to message #50492]

Fri, 06 October 2006 06:35

K. Bowman
Messages: 330
Registered: May 2000

Senior Member

In article <MPG.1f8f75b654670c76989d07@news.frii.com>,
David Fanning <davidf@dfanning.com> wrote:

> Kenneth P. Bowman writes:
>
>> I find that N_PARAMS() with SWITCH is very handy for setting defaults in
>> procedures where optional positional parameters make sense.
>>
>> PRO BLAH, A, B, C
>>
>> SWITCH N_PARAMS() OF
>> 0 : A = ...
>> 1 : B = ...
>> 2 : C = ...
>> ENDSWITCH
>
> In thinking about it, I guess I use N_ELEMENTS for
> all my parameters because I can throw better errors
> since I know *exactly* which parameter is missing:

As I said, this is only useful in cases where optional positional parameters
makes sense. That is, where some positional parameters are optional AND they
have a logical ordering such that you can pass A, or A and B, or A and B and C,
but not A and C or B and C. In that case, keyword parameters make more sense.

And, of course, KEYWORD_SET should only be used with binary keyword parameters,
that is, parameters that are set like this: /KEYWORD.

Ken

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[Message index]

		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 20:04
		Re: wrapper functions By: Kenneth P. Bowman on Thu, 05 October 2006 19:28
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 19:11
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 19:01
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 18:35
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 18:28
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 18:14
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 17:52
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 17:13
		Re: wrapper functions By: Dominic Metzger on Thu, 05 October 2006 16:51
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 16:39
		Re: wrapper functions By: K. Bowman on Fri, 06 October 2006 06:35
		Re: wrapper functions By: Dominic Metzger on Thu, 05 October 2006 22:32

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