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Re: Keyword checking [message #31012 is a reply to message #31011]

Wed, 29 May 2002 07:04

Jaco van Gorkom
Messages: 97
Registered: November 2000

Member

"Jaco van Gorkom" <j.c.van.gorkom@fz-juelich.de> wrote in message
news:ad2mat$3b09$1@zam602.zam.kfa-juelich.de...
> "Randall Skelton" <rhskelto@atm.ox.ac.uk> wrote in message
> news:Pine.LNX.4.33.0205291352100.19744-100000@mulligan.atm.o x.ac.uk...
>>
>> pro test, B=b
>> if n_elements(b) eq 0 and arg_present(b) eq 1 then $
>> message, 'You passed an undefined variable as a keyword'
>> if n_elements(b) gt 0 then b = 'passed'
>> end
>>
>> Surely there must be something simpiler than my 2-step approach ;)
>
> If the difference between "passing nothing" and "not passing anything"
> is really important to you, then this is it :-)
> Of course, you could always write this into your own function
> KEYWORD_UNDEFINED()...

Well, try to, maybe. As I sent this, it occurred to me that arg_present()
works only in the present function, sort of. Still, there may be
undocumented ways?

jaco

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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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