Dmitry Jemerov
18 lines
288 B
Kotlin
18 lines
288 B
Kotlin
abstract class A {
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abstract fun foo(): Any
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}
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interface B {
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fun foo(): String = "B"
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}
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interface C : A, B
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class D : A(), C
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fun box(): String {
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val d = D()
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val r = d.foo() + (d : C).foo() + (d : B).foo() + (d : A).foo()
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return if (r == "BBBB") "OK" else "Fail: $r"
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}
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