On Tue, Feb 15, 2005 at 09:34:31PM -0600, Patrick R. Michaud wrote:
> On Tue, Feb 15, 2005 at 07:20:53PM -0600, Jonathan Scott Duff wrote:
> > > Patrick R. Michaud wrote:
> > > >OTOH, what happens with...?
> > > >
> > > > sub nofun($x is rw) {
> > > > $x += 2;
> > > > }
> > > >
> > > > $y = 3 | 4;
> > > > nofun($y);
> >
> > That's either an error ("Can't modify constant") or the same as 5|6.
> > The former makes the most sense to me at the moment.
>
> Hmm. $y is definitely not constant -- that's how I was able to do
> the assignment in the first place. And "is rw" certainly doesn't
> sound like "constant" to me. :-)
No, no, I was thinking that $y is composed of constants 3 and 4. The
autothreading happens such that the call to nofun() is the same as if
you'd written:
3 += 2; 4 += 2;
which are attempts to modify those constants. This is assuming that
the Any type is inconsistent with the Junction type; otherwise it's
just the same as
$y += 2;
which should certainly yield 5|6
$y += 2 ->
$y = $y + 2 ->
$y = (3 + 2)|(4 +2) ->
$y = 5|6
-Scott
--
Jonathan Scott Duff
[EMAIL PROTECTED]
