On Thu, Oct 03, 2002 at 07:59:33PM -0600, John Williams wrote: > Reaction #2: Inheritance would automatically delegate all those > methods, so again, in what way does inheritance _not_ solve the problem?
I don't think p6l is the right place to discuss the merits of delegation, let's just say it's a Good Thing to have in your OO toolbelt. Solves a lot of problems which would otherwise require hairy, ambiguous multiple inheritance situations. If you're curious I can explain more off-list. > Finally, a question about interfaces: > In what way is an interface different from a pure abstract class (i.e. > containing only method declarations, but no code)? An interface requires subclassers to implement all abstract methods and they must match the method signatures, conditions and invariants of the interface. A pure abstract class doesn't necessarily require subclasses to do anything, at least not in Perl. So an interface is simply a class, maybe abstract, which requires its subclasses to conform to its signature. At least that's how I see it. -- Michael G. Schwern <[EMAIL PROTECTED]> http://www.pobox.com/~schwern/ Perl Quality Assurance <[EMAIL PROTECTED]> Kwalitee Is Job One It's Airplane Glue sniffing time!
