Add contract for 'use'

#KT-35216 Fixed
This commit is contained in:
Toshiaki Kameyama
2019-12-20 09:52:00 +09:00
committed by Ilya Gorbunov
parent 043eddb432
commit 941de655c4
5 changed files with 56 additions and 1 deletions
@@ -7,6 +7,7 @@
package kotlin.io
import java.io.Closeable
import kotlin.contracts.*
import kotlin.internal.*
/**
@@ -19,6 +20,9 @@ import kotlin.internal.*
@InlineOnly
@RequireKotlin("1.2", versionKind = RequireKotlinVersionKind.COMPILER_VERSION, message = "Requires newer compiler version to be inlined correctly.")
public inline fun <T : Closeable?, R> T.use(block: (T) -> R): R {
contract {
callsInPlace(block, InvocationKind.EXACTLY_ONCE)
}
var exception: Throwable? = null
try {
return block(this)