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stephenjudkins/gist:4230082

Created December 7, 2012 01:49
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gistfile1.scala
scala> @annotation.implicitNotFound("oh no! could not find Foo with ${A} ${B}") trait Foo[A,B]
defined trait Foo
scala> implicitly[Foo[String, Int]]
<console>:12: error: oh no! could not find Foo with String Int
implicitly[Foo[String, Int]]
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