On Wed, Mar 12, 2003 at 01:35:08PM +1100, Damian Conway wrote: : 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.
Might be one of those things that is taken as a tie-breaker, all other things being equal. I'm thinking return types fall into the same category. Larry