Files
kotlin-fork/compiler/testData/cfgVariablesWithStdLib/contracts/nestedTryCatchs.kt
T
Dmitry Savvinov f487525a1d Effects: add cfg-tests on inlined lambdas
==========
Introduction of Effect System: 15/18
2017-10-12 11:55:26 +03:00

45 lines
1.3 KiB
Kotlin
Vendored

// LANGUAGE_VERSION: 1.3
import kotlin.internal.contracts.*
inline fun <T> myRun(block: () -> T): T {
contract {
callsInPlace(block, InvocationKind.EXACTLY_ONCE)
}
return block()
}
fun innerComputation(): Int = 42
fun outerComputation(): Int = 52
fun innerTryCatchInitializes() {
val x: Int
try {
myRun {
try {
x = innerComputation()
x.inc()
}
catch (e: java.lang.Exception) {
/** Potential reassignment because x.inc() could threw */
x = 42
x.inc()
}
}
// Can get here only when inlined lambda exited properly, i.e. x is initialized
x.inc()
outerComputation()
} catch (e: java.lang.Exception) {
// Can get here if innerComputation() threw an exception that wasn't catched by the inner catch (x is not initialized)
// OR if outerComputation() threw an exception (x is initialized because we reach outer computation only when inner finished ok)
// So, x=I? here
x.inc()
// Potential reasignment
x = 42
}
// Here x=I because outer try-catch either exited normally (x=I) or catched exception (x=I, with reassingment, though)
x.inc()
}