Created
November 5, 2014 03:52
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| object Foo { | |
| def unapply(a: ASup): Option[B] = | |
| a match { | |
| case a0: A => a0.b match { case b: B => Some(b); case _ => None } | |
| case _ => None | |
| } | |
| } | |
| ax collect { case Foo(b) => ... } |
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