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Re: Storing !NULL in struct [message #83589 is a reply to message #83531]

Tue, 19 March 2013 01:59

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

On Tuesday, 19 March 2013 04:26:50 UTC+1, bobnn...@gmail.com wrote:

> I agree. LISTs and HASHes should return a reference to their elements and not a temporary copy.

Well put. This single sentence summarizes (my position in) the discussion well.

> In addition, IDL needs a reference type that would be similar to a PTR but would not need to be de-referenced to get at what it is pointing at. It could use de-referencing (or a function call) to set the reference but then would allow syntax like a normal variable. This would greatly simplify IDL programing and could perhaps be used to fix the mess that IDL LISTs and HASHes are.

I often use C =TEMPORARY(*P) in these situations, but then the contents of the pointer is then left undefined, and needs to be put back after use with P = PTR_NEW(C, /NO_COPY). Your suggestion would make this much easier.

--
Yngvar

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[Message index]

		Storing !NULL in struct By: tom.grydeland on Tue, 12 March 2013 05:09
		Re: Storing !NULL in struct By: Yngvar Larsen on Tue, 19 March 2013 01:59
		Re: Storing !NULL in struct By: Bob[4] on Mon, 18 March 2013 20:26
		Re: Storing !NULL in struct By: Michael Galloy on Mon, 18 March 2013 12:33
		Re: Storing !NULL in struct By: Yngvar Larsen on Mon, 18 March 2013 11:26
		Re: Storing !NULL in struct By: Michael Galloy on Mon, 18 March 2013 09:48
		Re: Storing !NULL in struct By: tom.grydeland on Mon, 18 March 2013 05:40
		Re: Storing !NULL in struct By: lecacheux.alain on Mon, 18 March 2013 05:20
		Re: Storing !NULL in struct By: tom.grydeland on Mon, 18 March 2013 04:41
		Re: Storing !NULL in struct By: lecacheux.alain on Mon, 18 March 2013 02:27
		Re: Storing !NULL in struct By: tom.grydeland on Mon, 18 March 2013 02:00
		Re: Storing !NULL in struct By: penteado on Fri, 15 March 2013 16:14
		Re: Storing !NULL in struct By: chris_torrence@NOSPAM on Fri, 15 March 2013 13:40
		Re: Storing !NULL in struct By: Michael Galloy on Fri, 15 March 2013 11:51
		Re: Storing !NULL in struct By: kagoldberg on Fri, 15 March 2013 09:40
		Re: Storing !NULL in struct By: Lajos Foldy on Fri, 15 March 2013 07:02
		Re: Storing !NULL in struct By: lecacheux.alain on Fri, 15 March 2013 06:31

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