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ceylon

Iterate enumerated class instances

Is there a simple way to iterate over all enumerated instances of a class in Ceylon?

Just like values() for Java enums?

abstract class Suit() of hearts | diamonds | clubs | spades {
    shared formal String name; 
}
object spades extends Suit() { name => "Spades"; }
object clubs extends Suit() { name => "Clubs"; }
object diamonds extends Suit() { name => "Diamonds"; }
object hearts extends Suit() { name => "Hearts"; }

Lets say I'd like to pick a random suit or I'd like to print all suits by their names.

Edit:

Explicitly adding all suits to an iterable works but we have to list all possible values again.

{Suit+} suits = {spades, clubs, diamonds, hearts};

Can somebody come up with something better?

Solution

  • This can be done now with ClassOrInterface.caseValues:

    Suit[] suits = `Suit`.caseValues;

    Regarding the returned sequence:

    This sequence is ordered and skips any case type to only include case values.