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21 lines
409 B
Kotlin
Vendored
21 lines
409 B
Kotlin
Vendored
fun isNull(x: Unit?) = x == null
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fun <T : Any> isNullGeneric(x: T?) = x == null
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fun deepIsNull0(x: Unit?) = isNull(x)
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fun deepIsNull(x: Unit?) = deepIsNull0(x)
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fun box(): String {
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if (!isNull(null)) return "Fail 1"
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val x: Unit? = null
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if (!isNull(x)) return "Fail 2"
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val y = x
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if (!isNullGeneric(y)) return "Fail 3"
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if (!deepIsNull(x ?: null)) return "Fail 4"
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return "OK"
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}
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