scala3 feature examples - anonymous class inference / published by https://github.com/dacr/code-examples-manager #23c62324-a693-4395-97ed-e5040e976d71/f147d97cab064ad2433a9bf2f589f9799a6a7361

scala3-feature-anonymous-class-inference.scala

// summary : scala3 feature examples - anonymous class inference
// keywords : scala3, tutorial, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 23c62324-a693-4395-97ed-e5040e976d71
// created-on : 2021-04-21T13:59:22+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

//> using scala "3.4.2"

trait Message {
  val text: String
}

def dumpMessage(message:Message) = println(message.text)

// ---------------------------------------------------------------

abstract class Person {
  val name: String
}

def sayHello(person:Person) = println("Hello "+person.name)

// ---------------------------------------------------------------

trait MutableStuff {
  var message: String=""
}

def someStuff(stuff:MutableStuff) = println(stuff.message)

// ---------------------------------------------------------------

@main def go():Unit = {
  dumpMessage(new {val text="Bouh!"})
  sayHello(new {val name="John"})
  someStuff(new {message="hummm?"}) // When the field is a var with an already defined and so overrable value
}