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Re: Storing !NULL in struct [message #83530 is a reply to message #83529]

Tue, 12 March 2013 11:15

Bob[4]
Messages: 24
Registered: April 2009

Junior Member

On Tuesday, March 12, 2013 6:09:37 AM UTC-6, Tom Grydeland wrote:
> Any reason I shouldn't expect this to work?
>
>
>
> IDL> help, { foo: !null }
>
>
>
> --T

Structure fields must be defined at the time of creation and the type (and rank and array sizes) cannot be changed after that. Thus, if you put a !null in the field you could never change it to anything else. Not very useful. If you do not know the detail of whatever you are going to put in the structure you have several options. Traditionally, you would use a PTR. These days you could use a LIST or HASH instead.

Bob

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[Message index]

		Re: Storing !NULL in struct By: Michael Galloy on Wed, 13 March 2013 07:46
		Re: Storing !NULL in struct By: tom.grydeland on Wed, 13 March 2013 01:17
		Re: Storing !NULL in struct By: Bob[4] on Tue, 12 March 2013 11:15
		Re: Storing !NULL in struct By: tom.grydeland on Fri, 15 March 2013 01:10

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