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Re: Unsupported keyword on older IDL version [message #31647 is a reply to message #31646]

Mon, 29 July 2002 08:14

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Paul Hick <pphick@ucsd.edu> writes:

> This kind of problem must have come up in this group before, but here it
> is anyways.
>
> If I call the IDL systime function with the utc keyword:
> print, systime(/utc)
>
> on IDL versions older than 5.4 I get the expected 'keyword not
> supported' error message, since, well, it's not supported, right? The
> error message pops up when the function containing the systime call is
> compiled, so testing e.g. !version.release before executing the systime
> call doesn't work.
>
> The only solution I have come up with so far is to put the systime call
> inside a call_function call:
> print, call_function( 'systime', /utc)
> This will compile (I will still need to test for !version.release before
> actually executing the statement of course).

Another possibility is to use the _EXTRA mechanism:

;; Assume EXTRA is undefined
if double(!version.release) GE 5.4 then $
extra = {utc: 1}
value = systime(_EXTRA=extra)

Anyway you cut it, you will need an IDL version check.

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: Unsupported keyword on older IDL version By: Paul Hick on Mon, 29 July 2002 20:30
		Re: Unsupported keyword on older IDL version By: David Fanning on Mon, 29 July 2002 20:21
		Re: Unsupported keyword on older IDL version By: Paul Hick on Mon, 29 July 2002 19:41
		Re: Unsupported keyword on older IDL version By: JD Smith on Mon, 29 July 2002 13:17
		Re: Unsupported keyword on older IDL version By: David Fanning on Mon, 29 July 2002 13:35
		Re: Unsupported keyword on older IDL version By: David Fanning on Mon, 29 July 2002 08:34
		Re: Unsupported keyword on older IDL version By: Craig Markwardt on Mon, 29 July 2002 08:14
		Re: Unsupported keyword on older IDL version By: thompson on Mon, 29 July 2002 07:40

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