xomrk/highlevel-try-finally.kt
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[history] Added try-else behaviour

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Andrew Golovashevich 2025-02-25 01:24:33 +03:00
parent 15146e02aa
commit 1b9bf5e49f
1 changed files with 7 additions and 1 deletions
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src/commonMain/kotlin/ru/landgrafhomyak/utility/highlevel_try_finally/safe_autoclose.kt
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@ -3,21 +3,27 @@ package ru.landgrafhomyak.utility.highlevel_try_finally
import kotlin.contracts.InvocationKind import kotlin.contracts.InvocationKind
import kotlin.contracts.contract import kotlin.contracts.contract
inline fun <R> safeAutoClose(onError: () -> Unit = {}, action: () -> R): R { inline fun <R> safeAutoClose(onError: () -> Unit = {}, onSuccess: () -> Unit = {}, action: () -> R): R {
contract { contract {
callsInPlace(action, InvocationKind.EXACTLY_ONCE) callsInPlace(action, InvocationKind.EXACTLY_ONCE)
callsInPlace(onError, InvocationKind.AT_MOST_ONCE) callsInPlace(onError, InvocationKind.AT_MOST_ONCE)
callsInPlace(onSuccess, InvocationKind.EXACTLY_ONCE)
} }
val ret: R val ret: R
var wasError = false
try { try {
ret = action() ret = action()
} catch (e1: Throwable) { } catch (e1: Throwable) {
wasError = true
try { try {
onError() onError()
} catch (e2: Throwable) { } catch (e2: Throwable) {
e1.addSuppressed(e2) e1.addSuppressed(e2)
} }
throw e1 throw e1
} finally {
if (!wasError)
onSuccess()
} }
return ret return ret
} }