.kotlin.kotlin-compiler.1.3.11.source-code.lazyUtil.kt Maven / Gradle / Ivy

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Kotlin Compiler

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package org.jetbrains.kotlin.ir.declarations.lazy

import kotlin.reflect.KProperty

internal fun  lazyVar(initializer: () -> T): UnsafeLazyVar = UnsafeLazyVar(initializer)

internal class UnsafeLazyVar(initializer: () -> T) {
    private var isInitialized = false;
    private var initializer: (() -> T)? = initializer
    private var _value: Any? = null

    private val value: T
        get() {
            if (!isInitialized) {
                _value = initializer!!()
                isInitialized = true
                initializer = null
            }
            @Suppress("UNCHECKED_CAST")
            return _value as T
        }

    override fun toString(): String = if (isInitialized) value.toString() else "Lazy value not initialized yet."

    operator fun getValue(thisRef: Any?, property: KProperty<*>): T = value

    operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T) {
        this._value = value
        isInitialized = true
    }
}