Evgeny Gerashchenko
21 lines
436 B
Kotlin
21 lines
436 B
Kotlin
abstract enum class ProtocolState {
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WAITING {
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override fun signal() = ProtocolState.TALKING
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}
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TALKING {
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override fun signal() = ProtocolState.WAITING
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}
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abstract fun signal() : ProtocolState
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}
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fun box(): String {
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var x: ProtocolState = ProtocolState.WAITING
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x = x.signal()
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if (x != ProtocolState.TALKING) return "fail 1"
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x = x.signal()
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if (x != ProtocolState.WAITING) return "fail 2"
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return "OK"
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} |