xiaozihan.larryxiao
47 lines
955 B
Kotlin
Vendored
47 lines
955 B
Kotlin
Vendored
// TARGET_BACKEND: JVM
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// WITH_STDLIB
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// FULL_JDK
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// FILE: 1.kt
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package test
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import kotlin.properties.ReadOnlyProperty
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import kotlin.reflect.KProperty
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interface Base {
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}
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class BaseImpl : Base {
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}
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class ObjectContainer {
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}
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typealias ObjectContainerProvider = () -> ObjectContainer?
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internal inline fun <reified T : Base> ObjectContainerProvider.extensionFun(): ReadOnlyProperty<Any, T> {
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return object : ReadOnlyProperty<Any, T> {
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val emptyProxy: T by lazy {
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T::class.java.getDeclaredConstructor().newInstance()
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}
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override fun getValue(thisRef: Any, property: KProperty<*>): T = emptyProxy
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}
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}
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// FILE: 2.kt
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import test.*
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class DefaultObjectContainerProvider : ObjectContainerProvider {
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val baseImpl: BaseImpl by extensionFun<BaseImpl>()
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override fun invoke(): ObjectContainer? {
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return null
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}
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}
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fun box(): String {
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DefaultObjectContainerProvider().baseImpl
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return "OK"
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} |