So you've baked extend into def and mac? This is very interesting!
Should = gets the same benefits? Since wart is a lisp-2 I guess it doesn't really apply [1], but if it were a lisp-1 would you treat (= fact (fn(n) ...)) the same way?
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[1] Or does it? I'm not yet well-versed in the ways of lisp-2-ness...
That's a good question. My immediate reaction is to make = clear the overload table..
And yes, in a lisp-2 assigning a function is different from defining one. But you can assign to (symbol-function f) in common lisp, which would have the same effect as def.
