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Re: wrapper functions [message #50503 is a reply to message #50502]

Thu, 05 October 2006 16:39

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Dometz writes:

> So, I am trying to create wrapper functions with the use of _EXTRA,
> _REF_EXTRA. I am not sure what I am doing wrong or if _REF_EXTRA can
> only be used for named arguments.
>
> Why does the following give me the attached error?
>
> LOG_READ_JPEG, './testall/read_jpeg.jpeg', a
>
>
> PRO LOG_READ_JPEG, _REF_EXTRA=e
> COMPILE_OPT HIDDEN
> print, "foobar"
> READ_JPEG, _EXTRA=e
> END
>
>
> Error message:
> READ_JPEG, _EXTRA=e
> ^
> % READ_JPEG: Incorrect number of arguments.

The _EXTRA mechanism is called *keyword* inheritance,
since only keyword parameters, not *positional* parameters
can be collected and passed with this approach. You
will have to define the positional parameters for READ_JPEG
in your wrapper routine.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 20:04
		Re: wrapper functions By: Kenneth P. Bowman on Thu, 05 October 2006 19:28
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 19:11
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 19:01
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 18:35
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 18:28
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 18:14
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 17:52
		Re: wrapper functions By: Robbie on Thu, 05 October 2006 17:13
		Re: wrapper functions By: Dominic Metzger on Thu, 05 October 2006 16:51
		Re: wrapper functions By: David Fanning on Thu, 05 October 2006 16:39
		Re: wrapper functions By: K. Bowman on Fri, 06 October 2006 06:35
		Re: wrapper functions By: Dominic Metzger on Thu, 05 October 2006 22:32

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