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Re: Keyword checking [message #31007 is a reply to message #31006]

Wed, 29 May 2002 08:22

Liam E. Gumley
Messages: 378
Registered: January 2000

Senior Member

William Thompson wrote:
[stuff deleted]
> I agree. I can't think of any legitimate reason why one would want to generate
> an error message if an undefined keyword was passed.
[stuff deleted]

As David points out, there are ways to do this sort of checking. However
I must agree with William. In my mind, the whole point of keywords is
that they are *optional*. If a valid defined variable is not passed for
a keyword, then the called routine must take some default action. If the
keyword is important enough that the developer thinks argument checking
wizardry is necessary, then perhaps it should be a positional parameter
instead.

Cheers,
Liam.
Practical IDL Programming
http://www.gumley.com/

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[Message index]

		Re: Keyword checking By: R.Bauer on Wed, 29 May 2002 09:02
		Re: Keyword checking By: Liam E. Gumley on Wed, 29 May 2002 08:22
		Re: Keyword checking By: thompson on Wed, 29 May 2002 07:55
		Re: Keyword checking By: Paul Van Delst[1] on Wed, 29 May 2002 07:15
		Re: Keyword checking By: Jaco van Gorkom on Wed, 29 May 2002 07:04
		Re: Keyword checking By: Jaco van Gorkom on Wed, 29 May 2002 06:52
		Re: Keyword checking By: David Fanning on Wed, 29 May 2002 06:43

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