Mikhail Glukhikh
18 lines
365 B
Kotlin
Vendored
18 lines
365 B
Kotlin
Vendored
public interface Collector<T, R>
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class A<out T> {
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fun foo(): T = null!!
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}
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public fun <T> toList(): Collector<T, A<T>> = null!!
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interface Stream<T> {
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public fun <R> collect(collector: Collector<in T, R>): R
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}
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fun stream(): Stream<String> = null!!
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fun main() {
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val stream: Stream<String> = stream()
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val xs = stream.collect(toList())
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xs.foo()
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} |