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milessabin/gist:9991675

Created April 5, 2014 13:01
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shapeless's Typeable in action ...
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gistfile1.scala
scala> import syntax.typeable._
import syntax.typeable._
scala> val wat: Any = List(1, 2, 3, 4)
wat: Any = List(1, 2, 3, 4)
scala> wat.cast[List[Int]].map(_.sum)
res0: Option[Int] = Some(10)
scala> val wat2: Any = "foo"
wat2: Any = foo
scala> wat2.cast[List[Int]].map(_.sum)
res1: Option[Int] = None
scala> val wat3: Any = List("foo", "bar", "baz")
wat3: Any = List(foo, bar, baz)
scala> wat3.cast[List[Int]].map(_.sum)
res2: Option[Int] = None
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