How many "subclass must override" assertions or comments in base class methods do we need to see, to want to add "abstract" to the Swift language? 5? 50? 500?
It's a not uncommon idiom in Objective-C. I'm about to port a substantial amount of C++ code to swift, and compiler help to enforce abstract classes would be very useful. -- C. Keith Ray Senior Software Engineer / Trainer / Agile Coach * http://www.thirdfoundationsw.com/keith_ray_resume_2014_long.pdf
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