Re: A6: overloading multis on constness of parameters

[Damian Conway]

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.

Damian