tiny types with value classes

Tweet.scala

case class UserId(id: Int) extends AnyVal

case class Username(name: String) extends AnyVal

case class TweetId(id: Int) extends AnyVal

case class TweetContent(content: String) extends AnyVal

case class User(id: UserId, name: Username)

case class Tweet(id: TweetId, content: TweetContent)

object Test extends App {
  val user = User(UserId(1), Username("kunal"))
  val tweet = Tweet(TweetId(10), TweetContent("ABC"))

  println(s"userID :- ${user.id}")
  println(s"tweetID:- ${tweet.content}")
}