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object typerep {
class TypeRep[T] {
def getType: TypeRep[T] = this
}
object BooleanRep extends TypeRep[Boolean] {
override def toString = "Boolean"
}
object CharRep extends TypeRep[Char] {
override def toString = "Char"
}
object IntRep extends TypeRep[Int] {
override def toString = "Int"
}
object LongRep extends TypeRep[Long] {
override def toString = "Long"
}
object FloatRep extends TypeRep[Float] {
override def toString = "Float"
}
object DoubleRep extends TypeRep[Double] {
override def toString = "Double"
}
class ListRep[U, T <: List[U]](val elemRep: TypeRep[U]) extends TypeRep[T] {
override def toString = "List[" + elemRep + "]"
}
implicit def typeRep(x: Boolean): TypeRep[Boolean] = BooleanRep
implicit def typeRep(x: Char ): TypeRep[Char ] = CharRep
implicit def typeRep(x: Long ): TypeRep[Long ] = LongRep
implicit def typeRep(x: Float ): TypeRep[Float ] = FloatRep
implicit def typeRep(x: Double ): TypeRep[Double ] = DoubleRep
implicit def typeRep(x: Int ): TypeRep[Int ] = IntRep
/*
implicit def typeRep[T](xs: List[T])(implicit rep: T => TypeRep[T]): TypeRep[List[T]] =
new ListRep(rep(xs.head))
*/
implicit def typeRep[T <% TypeRep[T]](xs: List[T]): TypeRep[List[T]] =
new ListRep(xs.head)
}
object test extends App {
import typerep._
println(3.getType)
println(List(3).getType)
}
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