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Re: _EXTRA inheritance crashing IDL [message #30269 is a reply to message #30198]

Thu, 11 April 2002 13:21

Rob.Preece
Messages: 8
Registered: December 1999

Junior Member

In article <MPG.171e9d5d95b9c99c98987f@news.frii.com>, david@dfanning.com wrote:

> Rob Preece (Rob.Preece@msfc.nasa.gov) writes:
>
>> OK, Rob de-lurking here.
>
> Oh, good. :-)
>
<snip>
>
> Well, yes, it crashes IDL 5.5, but not IDL 5.4. But I
> don't think you can hold RSI responsible for using their
> keyword inheritance mechanism in such a bogus way.
> Formatting the keywords you want to pass as a structure
> (the way this was meant to work) is error free:
>
> PRO test1, _REF_EXTRA = extra
> testStuff = {TITLE:'bob',XTITLE:'jim',YTITLE:'mary'}
> test2, INDGEN (10), _Extra=Create_Struct(testStuff, 'XRange',[0,5])
> END
>
> PRO test2, plotStuff, _EXTRA = extra
> PLOT, plotStuff, plotStuff, _EXTRA = extra
> END
>
> Cheers,
>
> David

Thanks David,

But:

I have a *very* good reason for doing it this way (otherwise, why bother!
;) I have a set of keywords to pass on to an embedded plot routine, and I
can't know at the time what their values will be. I have a plot zooming
function in a widget (object) that simply calls the object's 'PLOT'
method, passing new x and y ranges. The plot method does some stuff, and
then hands it all off to the IDL (direct) PLOT routine, adding in the
'XRANGE' and 'YRANGE' keywords so that they can be overridden when the
'ZOOM' method is invoked. Very much like 'test1' in my sample code. Since
I followed the documentation as Mark H. mentioned, is this a valid bug in
IDL? How to proceed?

Maybe I'll just go for a beer (unfortunately, no good Colorado brews make
it into Alabama!)...

- Rob

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[Message index]

		Re: _EXTRA inheritance crashing IDL By: David Fanning on Wed, 10 April 2002 21:42
		Re: _EXTRA inheritance crashing IDL By: Mark Hadfield on Wed, 10 April 2002 20:44
		Re: _EXTRA inheritance crashing IDL By: David Fanning on Wed, 10 April 2002 19:05
		Re: _EXTRA inheritance crashing IDL By: Mark Hadfield on Wed, 10 April 2002 15:41
		Re: _EXTRA inheritance crashing IDL By: Rob.Preece on Thu, 11 April 2002 13:21

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