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Re: Common blocks [message #4120 is a reply to message #3202]

Tue, 02 May 1995 00:00

rivers
Messages: 228
Registered: March 1991

Senior Member

In article <9505021847.AA14200@peace.med.ohio-state.edu>, phil@peace.med.ohio-state.edu (Phil) writes:
> I got a ? for y'all. I know how to use common blocks in procedures
> and functions but don't know hoe to do the following. Here's the
> scenario:
>
> 1) run program w/ a common block (it's a widget)
> 2) exit the widget
> 3) access the common block from the command line via
> IDL> common blockname
>
> Here's my ?. How do I get out of the common block and back to the
> 'main' variable space? I have tried retall, but that does not work.
> Any help would be appreciated.

You are not "in the common block". You ARE in the "main" variable space.
However, that variables in that common block are now "visible" in the main
program space, just like any other main program variable.

This can be useful in many circumstances. I don't think it is possible to make
that common block "invisible" again. It should not be a problem unless you try
to use a variable whose name is the same as one in the common block, which
might then have undesirable side-effects.

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Mark Rivers (312) 702-2279 (office)
CARS (312) 702-9951 (secretary)
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[Message index]

		common blocks By: craig on Tue, 06 December 1994 11:06
		Re: Common blocks By: phil on Wed, 03 May 1995 00:00
		Re: Common blocks By: rivers on Tue, 02 May 1995 00:00
		Re: Common blocks By: chase on Fri, 05 May 1995 00:00
		Re: Common blocks By: sjt on Fri, 12 May 1995 00:00
		Re: Common blocks By: Fergus Gallagher on Thu, 11 May 1995 00:00
		Re: common blocks By: Alex Schuster on Wed, 14 February 2001 08:56
		Re: common blocks By: David Fanning on Wed, 09 June 2004 12:35

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