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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