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Re: call_method [message #26479 is a reply to message #26478]

Thu, 06 September 2001 13:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Pavel A. Romashkin (pavel.romashkin@noaa.gov) writes:

> How does CALL_METHOD work? It would really be nice to be able to use the
> same routine as procedure or function, just as Call_method does,
> depending on what is happening in it. How did they do it?

I don't understand what you mean. If you are calling
a procedure method:

Call_Method, theMethod, theObject

If you are calling a function method:

result = Call_Method(theMethod, theObject)

You can't call a procedure method using the function
syntax, or visa versa.

IDL doesn't have any trouble keeping straight the difference
between procedures and functions with the same name:

PRO junk
Print, 'In procedure junk'
END

FUNCTION junk
Print, 'In function junk'
END

IDL> junk
In procedure junk
IDL> a=junk()
In function junk

Clearly, you can write your own routines to work exactly
like Call_Method.

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: call_method By: David Fanning on Thu, 06 September 2001 14:24
		Re: call_method By: Pavel A. Romashkin on Thu, 06 September 2001 13:54
		Re: call_method By: David Fanning on Thu, 06 September 2001 13:27
		Re: call_method By: Kristian Kjaer on Fri, 07 September 2001 15:03
		Re: call_method By: Mark Hadfield on Thu, 06 September 2001 20:42

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