Zalim Bashorov
38 lines
731 B
Kotlin
Vendored
38 lines
731 B
Kotlin
Vendored
// WITH_RUNTIME
|
|
// KJS_WITH_FULL_RUNTIME
|
|
// FILE: 1.kt
|
|
package test
|
|
|
|
class WeakReference<T>(val value: T)
|
|
|
|
inline fun <K, V> MutableMap<K, WeakReference<V>>.getOrPutWeak(key: K, defaultValue: ()->V): V {
|
|
val value = get(key)?.value
|
|
return if (value == null) {
|
|
val answer = defaultValue()
|
|
put(key, WeakReference(answer))
|
|
answer
|
|
} else {
|
|
value
|
|
}
|
|
}
|
|
|
|
|
|
// FILE: 2.kt
|
|
import test.*
|
|
|
|
class LabelHolder {
|
|
|
|
fun test(): String {
|
|
return "hello".label
|
|
}
|
|
|
|
private val labels = hashMapOf<String?, WeakReference<String>>()
|
|
|
|
private val String?.label: String
|
|
get(): String = labels.getOrPutWeak(this) { "OK" }
|
|
}
|
|
|
|
fun box(): String {
|
|
return LabelHolder().test()
|
|
}
|