Dmitriy Novozhilov
24 lines
477 B
Kotlin
Vendored
24 lines
477 B
Kotlin
Vendored
interface Maybe<T>
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class Some<T>(val value: T) : Maybe<T>
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class None<T> : Maybe<T>
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fun <T> none() : None<T> = TODO()
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fun test1() : Maybe<String?> = if (true) none() else Some("")
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fun test2() : Maybe<String?> = when {
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true -> none()
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else -> Some("")
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}
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fun test3() : Maybe<String?> = when {
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true -> none()
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else -> Some<String?>("")
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}
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fun test4() : Maybe<String?> {
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when ("") {
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"a" -> return none()
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else -> return Some<String?>("")
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}
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} |