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Re: Pointer syntax and IDL 4.0 [message #28615 is a reply to message #28532]

Wed, 19 December 2001 15:36

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Paul van Delst <paul.vandelst@noaa.gov> writes:

> tam wrote:
>>
>> Recently I upgraded the a couple of routines to use pointers
>> in certain special cases. However the pointer dereference operator
>> is illegal prior to version 5.0, so the code fails to compile on
...
>> Any ideas?
>
> Have a lookie at:
>
> http://cimss.ssec.wisc.edu/~gumley/pointers.html

Paul is right. Liam's code will work in IDL 4 and 5, and provides an
interface that works under both versions of IDL too. Under IDL 4
there are no pointers, but "handles" are used instead, which have
basically the same functionality. Basically you use POINTER_CREATE,
POINTER_VALUE and POINTER_FREE in place of the normal pointer
operations, and you are done.

Craig

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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Pointer syntax and IDL 4.0 By: John-David T. Smith on Wed, 19 December 2001 13:59
		Re: Pointer syntax and IDL 4.0 By: thompson on Wed, 19 December 2001 13:11
		Re: Pointer syntax and IDL 4.0 By: Pavel A. Romashkin on Wed, 19 December 2001 13:01
		Re: Pointer syntax and IDL 4.0 By: Paul van Delst on Wed, 19 December 2001 13:07
		Re: Pointer syntax and IDL 4.0 By: Craig Markwardt on Wed, 19 December 2001 15:36

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