> ----- Original Message -----
> From: "Damian Conway" <[EMAIL PROTECTED]>
> To: "Perl6" <[EMAIL PROTECTED]>
> Sent: Tuesday, March 11, 2003 9:35 PM
> Subject: Re: A6: overloading multis on constness of parameters
>
>
> > Joe Gottman wrote:
> >
> > > Will it be possible in perl6 to overload multis on the const-ness of
> a
> > > parameter, like C++ does? For instance,
> > >
> > > multi getX(Foo $self:) returns Int {...} #const version
> > > multi getX(Foo $self: is rw) returns Int is rw {...} #non-const
> version
> >
> > That second one would have to be:
> >
> > multi getX(Foo $self is rw:) returns Int is rw {...}
> >
> >
> > Then we have the issue that Perl 6 objects can't really be "constant",
> > since C<is constant> is a compile-time trait of *containers*...really just
> > a "don't assign to this container" marker.
> >
> > However, within those limitations, I guess it's possible. After all, we
> have
> > to check for lvaluability of C<is rw> parameters anyway.
>
> How would I take a get a reference to the second one? I assume I could
> get a reference to the first by
>
> $ref = &getX(Foo);
Well, if there's overloading based on traits, siglets must support
traits. So, it would have to be:
$ref = &getX(Foo is rw:);
(The first would be)
$ref = &getX(Foo:);
Backwhacking those couldn't hurt, either.
Luke
