Created
January 29, 2013 18:16
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Solving AST typing riddles
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| trait Rewriter[T] extends { | |
| def rewrite[X <: T](a: Rewritable[X]): Rewritable[X] | |
| } | |
| trait Rewritable[T] { | |
| self: T with Rewritable[T] => | |
| def rewrite(r: Rewriter[T]): T = r.rewrite[T](self).reveal | |
| def reveal: T = self | |
| } | |
| class A extends Rewritable[A] | |
| class B extends A with Rewritable[B] |
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