added tests for KT-2369, KT-2585 and KT-2972

KT-2369 Variable is not marked as uninitialized in 'finally' section #KT-2369 fixed KT-2585 Code in try-finally is incorrectly marked as unreachable #KT-2585 fixed KT-2972 Wrong "unused value" warning when finally is present #KT-2972 fixed
2012-12-12 18:37:42 +04:00
parent 97058e628e
commit d7a60f5fed
6 changed files with 110 additions and 0 deletions
@@ -0,0 +1,28 @@
+//KT-2972 Wrong "unused value" warning when finally is present
+
+import java.io.Closeable
+
+public inline fun <T: Closeable, R> T.use(block: (T)-> R) : R {
+    var closed = false
+    try {
+        return block(this)
+    } catch (e: Exception) {
+        closed = true // warning here
+        try {
+            this.close()
+        } catch (closeException: Exception) {
+            // eat the closeException as we are already throwing the original cause
+            // and we don't want to mask the real exception
+
+            // TODO on Java 7 we should call
+            // e.addSuppressed(closeException)
+            // to work like try-with-resources
+            // http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html#suppressed-exceptions
+        }
+        throw e
+    } finally {
+        if (!closed) {
+            this.close()
+        }
+    }
+}