v1.24.1

ValueEnum

ValueEnum is a new way for defining Scala enums, representing enum constants as final vals in companion object of enum class.

Advantages:

• feature parity with Java enums (although ValueEnum does not extend java.lang.Enum)
• every enum constant has name (name of the final val that declares the constant) and ordinal (zero based index of enum constant, consistent with declaration order).
• less boilerplate than sealed hierarchy based enums
• it's possible to declare many enum constants in a single line of code
• much less generated classes, which is advantageous primarily for JS size reduction

Disadvantages:

• scalac exhaustive pattern match checking does not understand ValueEnum which may result in both lack of correct warnings and incorrect warnings
• each enum constant can't have its own API (unless through implicit classes)