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Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA [message #25174 is a reply to message #25075]

Fri, 18 May 2001 22:28

Mark Rivers
Messages: 49
Registered: February 2000

Member

mankoff@I.HATE.SPAM.lasp.colorado.edu wrote in message ...

> Now its true that I don't know anything about the actual IDL
> implementation (though I have written RPC code for IDL). I actually
> answered based upon the behavior of IDL, not the implementation. That is,
> functions won't modify the callers variables, and neither will procedures,
> unless you add the 'return'.

That's not true. Here's the proof:
pro myproc, a
a=2
end

function myfunc, a
a=3
end

; Test program
a = 1
myproc, a
help, a
a = 0
t = myfunc(a)
help, a
end

.run test
A INT = 2
A INT = 3

So the procedure and the function both modified arguments passed to them.

Mark Rivers

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[Message index]

		Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA By: <mankoff[1] on Fri, 18 May 2001 17:17
		Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA By: Craig Markwardt on Fri, 18 May 2001 12:31
		Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA By: John-David T. Smith on Tue, 22 May 2001 13:41
		Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA By: Craig Markwardt on Sat, 19 May 2001 10:20
		Re: IDL interpreter questions - can someone (D.Fanning) explain - TIA By: Mark Rivers on Fri, 18 May 2001 22:28

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