They're called "Protocols" and were the original inspiration for
Java's interfaces:
http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_7_section_1.html
HTH,
Dave
On 11 Jan, 2009, at 7:20 PM, Michael A. Crawford wrote:
I want to force derived classes to implement a given interface
without provided a default implementation. Does the concept exist
in Objective-C (I'm almost sure it does)? If so, what does the
syntax look like?
-Michael
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