Abduqodiri Qurbonzoda
48 lines
1.6 KiB
Kotlin
48 lines
1.6 KiB
Kotlin
/*
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* Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
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*/
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@file:kotlin.jvm.JvmName("KClasses")
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@file:Suppress("UNCHECKED_CAST")
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package kotlin.reflect
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import kotlin.internal.LowPriorityInOverloadResolution
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/**
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* Casts the given [value] to the class represented by this [KClass] object.
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* Throws an exception if the value is `null` or if it is not an instance of this class.
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*
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* This is an experimental function that behaves as a similar function from kotlin.reflect.full on JVM.
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*
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* @see [KClass.isInstance]
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* @see [KClass.safeCast]
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*/
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@SinceKotlin("1.4")
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@WasExperimental(ExperimentalStdlibApi::class)
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@LowPriorityInOverloadResolution
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fun <T : Any> KClass<T>.cast(value: Any?): T {
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if (!isInstance(value)) throw ClassCastException("Value cannot be cast to $qualifiedOrSimpleName")
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return value as T
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}
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// TODO: replace with qualifiedName when it is fully supported in K/JS
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internal expect val KClass<*>.qualifiedOrSimpleName: String?
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/**
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* Casts the given [value] to the class represented by this [KClass] object.
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* Returns `null` if the value is `null` or if it is not an instance of this class.
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*
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* This is an experimental function that behaves as a similar function from kotlin.reflect.full on JVM.
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*
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* @see [KClass.isInstance]
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* @see [KClass.cast]
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*/
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@SinceKotlin("1.4")
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@WasExperimental(ExperimentalStdlibApi::class)
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@LowPriorityInOverloadResolution
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fun <T : Any> KClass<T>.safeCast(value: Any?): T? {
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return if (isInstance(value)) value as T else null
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}
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