Setup label value in constructor to be invalid until 'invoke(Controller)' call

2016-06-03 12:16:42 +03:00
parent 759cb83dfb
commit 678e8c2baa
4 changed files with 71 additions and 4 deletions
@@ -0,0 +1,42 @@
+// WITH_RUNTIME
+class Controller {
+    suspend fun suspendHere(x: Continuation<Unit>) {
+        x.resume(Unit)
+    }
+}
+
+fun builder1(coroutine c: Controller.() -> Continuation<Unit>) {
+    (c as Continuation<Unit>).resume(Unit)
+}
+
+fun builder2(coroutine c: Controller.() -> Continuation<Unit>) {
+    val continuation = c(Controller())
+    val declaredField = continuation!!.javaClass.getDeclaredField("label")
+    declaredField.setAccessible(true)
+    declaredField.set(continuation, -3)
+    continuation.resume(Unit)
+}
+
+fun box(): String {
+
+    try {
+        builder1 {
+            suspendHere()
+        }
+        return "fail 1"
+    } catch (e: java.lang.IllegalStateException) {
+        if (e.message != "call to 'resume' before 'invoke' with coroutine") return "fail 2: ${e.message!!}"
+    }
+
+    try {
+        builder2 {
+            suspendHere()
+        }
+        return "fail 3"
+    } catch (e: java.lang.IllegalStateException) {
+        if (e.message != "call to 'resume' before 'invoke' with coroutine") return "fail 4: ${e.message!!}"
+        return "OK"
+    }
+
+    return "fail"
+}