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scala algebric data types / published by https://github.com/dacr/code-examples-manager #991c877f-0b43-4cab-86be-4a064660407e/efa93f2e9288e77e85fbe37fb16ffa48c0a60146
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// summary : scala algebric data types | |
// keywords : scala, adt, algebric-data-types, language-feature, @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 : 991c877f-0b43-4cab-86be-4a064660407e | |
// created-on : 2020-05-31T19:54:52Z | |
// managed-by : https://github.com/dacr/code-examples-manager | |
// run-with : scala-cli $file | |
// --------------------- | |
//> using scala "3.1.1" | |
//> using dep "org.scalatest::scalatest:3.2.10" | |
// --------------------- | |
// written after [John De Goes - 12 Steps To Better Scala (Part I)](https://youtu.be/71yhnTGw0hY) | |
println( | |
""" | |
|Algebric Data Types (ATD) is made of | |
| + Product types (just simple case class) | |
| - Defines commonality | |
| + Sum types | |
| | |
|the goal of ADT is to made impossible to represent an illegal state ! | |
| | |
|[John De Goes - 12 Steps To Better Scala (Part I)](https://youtu.be/71yhnTGw0hY) | |
| | |
|""".stripMargin | |
) | |
// ---------------------------------------------------------------- | |
// Products | |
case class Person(name:String, age:Int) | |
// ---------------------------------------------------------------- | |
// Sums | |
sealed trait Contact | |
case class Email(value: String) extends Contact | |
case class Phone(value: String) extends Contact | |
println("so inheritance is not used...") |
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