Re: [chuck-users] wishlist for the new year

On Fri, Jan 1, 2010 at 11:15 PM, Michael Heuer wrote:

2.  Java-style interface abstract classes, or multiple class inheritance Or maybe Objective-C style protocols?

These work sorta like this: (void) foo (int)bar: { ... } Which just says "this code will conform to the 'protocol1' and 'protocol2' protocols. Protocols are then sorta like Java interfaces; they define the methods (with signatures) that the class must implement and may implement. Much more flexible for a more dynamic language. "Okay, I implemented foo, bar, and baz with the right signatures, so I conform to the X protocol." Any class that implements the required methods can then be used by any method that requires an object confirm to the protocol - and the caller doesn't care what the class is, just what it does. It can do anything else in addition it wants to. --- Joe M.