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Re: pointer question [message #24315 is a reply to message #24314]

Thu, 22 March 2001 08:24

Pavel A. Romashkin
Messages: 531
Registered: November 2000

Senior Member

Mark Hadfield wrote:

> pro test, a
>
> ; Do something with a
>
> if not arg_present(a) then if ptr_valid(a) then ptr_free, a
>
> end

I am sorry, I have not had my first cup of coffe yet. How is that
supposed to work? If there is *no* argument present, *then* try to check
if the missing argument is a pointer? What am I missing? Should it be

if arg_present(a) then if ptr_valid(a) then ptr_free, a ;?

Also, in the example provided by Ted, the parameter is not going to be
recognized by Arg_present, because it is not passed by reference since
it is an expression.
But I think Paul answered already how to do this sort of thing properly.

Cheers,
Pavel

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[Message index]

		Re: pointer question By: Martin Schultz on Mon, 26 March 2001 01:05
		Re: pointer question By: Mark Hadfield on Sun, 25 March 2001 14:16
		Re: pointer question By: Mark Hadfield on Sun, 25 March 2001 14:07
		Re: pointer question By: R.Bauer on Sun, 25 March 2001 09:24
		Re: pointer question By: Craig Markwardt on Thu, 22 March 2001 20:15
		Re: pointer question By: Paul van Delst on Thu, 22 March 2001 10:00
		Re: pointer question By: Pavel A. Romashkin on Thu, 22 March 2001 09:21
		Re: pointer question By: John-David T. Smith on Thu, 22 March 2001 08:56
		Re: pointer question By: Pavel A. Romashkin on Thu, 22 March 2001 08:24
		Re: pointer question By: Paul van Delst on Thu, 22 March 2001 06:52
		Re: pointer question By: Jaco van Gorkom on Thu, 22 March 2001 06:01
		Re: pointer question By: Mark Hadfield on Wed, 21 March 2001 19:47
		Re: pointer question By: Craig Markwardt on Mon, 26 March 2001 04:56
		Re: pointer question By: egraves on Mon, 26 March 2001 17:06

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