Java's records, Lombok's data, and Kotlin's data classes

Re:Java's records, Lombok's data, and Kotlin's data classes by balefrost on Friday May 07, 2021 @04:04PM (#27080299)

The point of sealed classes is that you have a known number of possible representations. So you can have `when` blocks that exhaustively check all possibilities. Having an open class hierarchy would not work for that purpose.

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Re:Java's records, Lombok's data, and Kotlin's data classes by __jem on Friday May 07, 2021 @09:17PM (#27082722)

this technique works with sealed classes, i’ve done it before. it throws a runtime exception if it can’t identify the discriminant.

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