Re: ROUTINE_NAMES and other magic

["R.Bauer" <R.Bauer(at)fz-juelich.de>]

Craig Markwardt wrote:

> "R.Bauer" <R.Bauer@fz-juelich.de> writes:
> > Craig Markwardt wrote:
> >
> > > One thing that ROUTINE_NAMES() (**note) cannot do is *add* variables
> > > to another level.  If the variable exists, then you can muck as much
> > > as you want with it, but if it doesn't exist, sorry.
> >
> > You can add variables to another level.
> > Try this!
> >
> >
> >
> > PRO DEEPSTOP, level
> >    IF level EQ 1 THEN BEGIN
> >       level = ROUTINE_NAMES(/LEVEL)
> >       varName = 'A'
> >       void = ROUTINE_NAMES(varName, STORE=(level+1), 8)
> >    ENDIF
> >    IF level EQ 2 THEN begin
> >    print,a
> >    STOP
> >    end
> >    deepstop, level + 1
> > END
>
> Ahhh, but I argue that your procedure works for the reasons I said
> before.  The variable A already existed in the procedure because you
> used it in a statement ("print, a").  So you really were not *adding*
> the variable to the procedure.
>
> Try this one:
>
> PRO DEEPSTOP2, level
>    IF level EQ 1 THEN BEGIN
> ;     a = 0
>       level = ROUTINE_NAMES(/LEVEL)
>       varName = 'A'
>       void = ROUTINE_NAMES(varName, STORE=(level+1), 8)
>       help
>    ENDIF
>    IF level EQ 2 THEN begin
>      help
>      STOP
>    end
>    deepstop, level + 1
> END
>
> This procedure does not mention "A" explicitly anywhere, and I can't
> get beyond the first IF clause.
>
> IDL> deepstop2, 1
> % ROUTINE_NAMES: Variable is undefined: A.
> % Execution halted at:  DEEPSTOP2           5 /dev/tty
> %                       $MAIN$
>
> But, if you uncomment the "a=0" line above, then you can get further.
> What I find is that the value of A is set at *both* levels!
>
> I am using an older version of IDL, 5.2.  This tells me that the
> functionality of ROUTINE_NAMES continued to evolve between versions,
> and that you can't be guaranteed to be able to add new variables in
> older versions.
>

Dear Craig,

I did yesterday a bad mistake in my script deepstop.
Today early in the morning I recognized what's my script really does.

I have overwritten the variable level, which is the counter too.


Sorry.

Reimar