> On Tue, Oct 01, 2002 at 03:43:22PM -0400, Trey Harris wrote:
>> You want something like
>>
>> class Car is Vehicle renames(drive => accel)
>> is MP3_Player renames(drive => mp3_drive);
I *really* like this, but would the above be better coded as:
class Car is Vehicle renames(drive => accel)
has MP3_Player renames(drive => mp3_drive);
.... implying a "container" relationship with automatic delegation?
Among the other considerations is that if you simply said
class Car is Vehicle has MP3_Player;
the inheritance chain could assume that Car.drive === Vehicle.drive,
because is-a (inheritance) beats has-a (containment or delegation). If
you needed to, you should still be able to call $mycar.MP3_Player.drive
to DWYM, too.
Along these lines, I'd love the ability to do something like:
class Bird is Animal
has (LeftWing is Wing) # a "named" Wing
has (RightWing is Wing)
has (LeftLeg is Leg)
has (RightLeg is Leg);
$bird.LeftWing.flap; # makes sense
$bird.flap; # but what's this do? left, right, or
_both_?
$bird^.Wing.flap # perhaps too evil? :-)
MikeL
