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import scala.reflect.runtime.universe._
object TestCase {
//now matter if you put (abstract) class or trait it will fail in all cases
trait MapOps[T]
//if fs was reduced to List (generic type with one parameter) then the code compiles
//if you inherit from MapOps[T] instead of MapOps[F] then code compiles fine
implicit def map2ops[T,F](fs: Map[T,F]) = new MapOps[F] {
//if you remove this line, then code compiles
lazy val m: TypeTag[T] = sys.error("just something to make it compile")
def is(xs: List[T]) = List(xs)
}
def main(args: Array[String]) {
println(Map(1 -> "2") is List(2))
}
}
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