Yan Zhulanow
17 lines
367 B
Kotlin
Vendored
17 lines
367 B
Kotlin
Vendored
package foo
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open class Foo<out T>(open val value: T)
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open class MutableFoo<T>(override var value: T): Foo<T>(value)
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operator fun <T> Foo<T>.plus(x: T): Foo<T> = Foo(x)
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// overloading:
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operator fun <T> MutableFoo<T>.plus(x: T): MutableFoo<T> = MutableFoo(x)
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fun box(): Boolean {
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var f = MutableFoo(1)
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f += 2
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return (f is MutableFoo && f.value == 2)
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}
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