That's the inside view.
When I read about assingment, it says that the value of the expression on the
righthand side
is assigned to the variable on the lefthand side.
consider
r.=0
r.3=16
rr.=r.
blabla=r.
Say 'blabla='blabla
Walter Pachl
---- Rick McGuire <[email protected]> schrieb:
> It most certainly IS an assignment. The stem variable rr. is set to
> contain a reference to the same stem object referenced by the stem variable
> r. ooRexx does not have a concept of variable aliasing. This is the same
> assignment mechanism that allows USE ARG to work or returning a stem object
> from a function or method call. I don't have the reference handy right now
> so I can't cite chapter and verse, but this is most certainly documented.
>
> Rick
>
> On Mon, May 25, 2015 at 7:10 AM, Walter Pachl <[email protected]>
> wrote:
>
> > In REXX version 1 of this RC-task:
> >
> > http://rosettacode.org/wiki/Hofstadter_Figure-Figure_sequences#REXX
> >
> > there is this statement
> >
> > rr.=r.;
> >
> > which shows a severe incompatibility.
> >
> >
> >
> > With Regina, this program runs fine.
> >
> > With ooRexx it fails!
> >
> >
> >
> > The reason is that the above is NOT an assignment
> >
> > but it makes rr. a synonym/alias for r.
> >
> >
> >
> > I skimmed the ooRexx reference and could not find a
> >
> > description of this fact.
> >
> >
> >
> > Besides: This IS a bit of a surprise and what I
> >
> > don't quite understand what this is good for.
> >
> >
> >
> > Regards,
> >
> > Walter
> >
> >
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