Alexander Korepanov
16 lines
454 B
Kotlin
Vendored
16 lines
454 B
Kotlin
Vendored
// !OPT_IN: kotlin.js.ExperimentalJsExport
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// FIR_IDENTICAL
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@file:JsExport
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interface Optional<out T> {
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@JsName("valueOrThrowException")
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fun valueOrThrow(exp: Throwable): T
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fun valueOrThrow(): T = valueOrThrow(NoSuchElementException("Optional has no value"))
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}
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abstract class None<out T : Any> private constructor() : Optional<T> {
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companion object : None<Nothing>()
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override fun valueOrThrow(exp: Throwable): Nothing = throw exp
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}
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