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Fix weakRef

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Him188 2020-01-17 16:24:11 +08:00
parent aebaf605a7
commit 8e6c68b8b6
1 changed files with 27 additions and 12 deletions
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39
mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/WeakRef.kt
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@ -11,19 +11,34 @@ import kotlin.reflect.KProperty
inline class UnsafeWeakRef<T>(private val weakRef: WeakRef<T>) { inline class UnsafeWeakRef<T>(private val weakRef: WeakRef<T>) {
fun get(): T = weakRef.get() ?: error("WeakRef is released") fun get(): T = weakRef.get() ?: error("WeakRef is released")
fun clear() = weakRef.clear() fun clear() = weakRef.clear()
}
/** /**
* Provides delegate value. * Provides delegate value.
* *
* ```kotlin * ```kotlin
* val bot: Bot by param.unsafeWeakRef() * val bot: Bot by param.unsafeWeakRef()
* ``` * ```
*/ */
operator fun provideDelegate(thisRef: Any?, property: KProperty<*>): ReadOnlyProperty<Any?, T> { operator fun <T> UnsafeWeakRef<T>.provideDelegate(thisRef: Any?, property: KProperty<*>): ReadOnlyProperty<Any?, T> {
return object : ReadOnlyProperty<Any?, T> { return object : ReadOnlyProperty<Any?, T> {
override fun getValue(thisRef: Any?, property: KProperty<*>): T { override fun getValue(thisRef: Any?, property: KProperty<*>): T {
return get() return get()
} }
}
}
/**
* Provides delegate value.
*
* ```kotlin
* val bot: Bot by param.unsafeWeakRef()
* ```
*/
operator fun <T> WeakRef<T>.provideDelegate(thisRef: Any?, property: KProperty<*>): ReadOnlyProperty<Any?, T?> {
return object : ReadOnlyProperty<Any?, T?> {
override fun getValue(thisRef: Any?, property: KProperty<*>): T? {
return get()
} }
} }
} }