Created
June 9, 2020 04:47
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Shapeless Intro
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import shapeless._ | |
val oneHello = 1 :: "hello" :: Nil | |
val oneHello = 1 :: "hello" :: HNil | |
final case class User(name: String, age: Int) | |
val genericUser = Generic[User] | |
type GenericUserType = genericUser.Repr | |
val user = User("Stephen", 42) | |
val userGen = Generic[User].to(user) | |
val backToUser = Generic[User].from(userGen) | |
val userLabelledGen = LabelledGeneric[User].to(user) | |
val backToUser = LabelledGeneric[User].from(userLabelledGen) | |
val name: "name" = "name" | |
sealed trait Shape | |
case class Circle(radius: Int) extends Shape | |
case class Rectangle(height: Int, width: Int) extends Shape | |
case object Point extends Shape | |
val genericShape = Generic[Shape] | |
val circleGen = genericShape.to(Rectangle(2, 3)) | |
val backToCircle = genericShape.from(circleGen) |
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