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Re: wrapper functions [message #50500 is a reply to message #50499]

Thu, 05 October 2006 17:52

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Dometz writes:

> Hah, I see... is there a way that I wont have to define the positional
> parameters since otherwise I will have to check again which ones were
> passed in?
>
> Example
> READ_PICT, Filename, Image [, R, G, B]
>
> so, here I would have to check if R was passed in, if G was passed in,
> if B was passed in to see if I need to include them in the call inside
> of the wrapper function.

If you don't want to rely on the error handling of the
routine you are writing the wrapper for, you need to
check the required positional parameters (filename,
and image in this case). I would define the optional
positional parameters, but I wouldn't bother checking
them, since the routine you are calling will do that.
(At least if it is written half-way decently. :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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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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