jvmMain.kotlin.AutoCloseableJVM.kt Maven / Gradle / Ivy

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Kotlin Standard Library for JVM

There is a newer version: 2.1.0-RC

/*
 * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

@file:JvmName("AutoCloseableKt")
@file:JvmPackageName("kotlin.jdk7")

package kotlin

import kotlin.contracts.InvocationKind
import kotlin.contracts.contract

@SinceKotlin("2.0")
public actual typealias AutoCloseable = java.lang.AutoCloseable

@SinceKotlin("2.0")
@kotlin.internal.InlineOnly
public actual inline fun AutoCloseable(crossinline closeAction: () -> Unit): AutoCloseable = java.lang.AutoCloseable { closeAction() }

@SinceKotlin("1.2")
@kotlin.internal.InlineOnly
public actual inline fun  T.use(block: (T) -> R): R {
    contract {
        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
    }
    var exception: Throwable? = null
    try {
        return block(this)
    } catch (e: Throwable) {
        exception = e
        throw e
    } finally {
        this.closeFinally(exception)
    }
}

@SinceKotlin("1.2")
@PublishedApi
internal fun AutoCloseable?.closeFinally(cause: Throwable?): Unit = when {
    this == null -> {}
    cause == null -> close()
    else ->
        try {
            close()
        } catch (closeException: Throwable) {
            cause.addSuppressed(closeException)
        }
}