Dmitry Jemerov
33 lines
559 B
Kotlin
Vendored
33 lines
559 B
Kotlin
Vendored
import java.util.ArrayList
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import java.util.Arrays
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abstract class A {
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abstract fun foo(): List<String>
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}
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interface B {
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fun foo(): ArrayList<String> = ArrayList(Arrays.asList("B"))
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}
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open class C : A(), B
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interface D {
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fun foo(): Collection<String>
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}
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class E : D, C()
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fun box(): String {
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val e = E()
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var r = e.foo()[0]
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val d: D = e
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val c: C = e
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val b: B = e
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val a: A = e
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r += d.foo().iterator().next()
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r += c.foo()[0]
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r += b.foo()[0]
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r += a.foo()[0]
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return if (r == "BBBBB") "OK" else "Fail: $r"
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}
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