Mikhail Glukhikh
f6872dfbea
When on sealed can use is (both for derived classes and objects) or just comparison (only for derived objects). A pack of tests provided.
18 lines
371 B
Kotlin
Vendored
18 lines
371 B
Kotlin
Vendored
sealed class Sealed(val x: Int) {
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object First: Sealed(12)
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open class NonFirst(x: Int, val y: Int): Sealed(x) {
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object Second: NonFirst(34, 2)
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object Third: NonFirst(56, 3)
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}
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}
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fun foo(s: Sealed?): Int {
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return when(s) {
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is Sealed.First -> 1
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is Sealed.NonFirst -> 0
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null -> -1
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// no else required
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}
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}
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