September 2017 Update

Task/Exceptions/Elena/exceptions-1.elena

@@ -0,0 +1,5 @@
+class MyException :: Exception
+{
+    constructor new
+        <= new literal:"MyException raised".
+}

Task/Exceptions/Elena/exceptions-2.elena

@@ -0,0 +1,4 @@
+foo
+    [
+        MyException new; raise.
+    ]

Task/Exceptions/Elena/exceptions-3.elena

@@ -0,0 +1,7 @@
+try(o foo)
+    {
+        on(MyException e)
+        [
+            // handle exceptions of type MyException and derived
+        ]
+    }

Task/Exceptions/Elena/exceptions-4.elena

@@ -0,0 +1,4 @@
+o foo | if(:e)
+   [
+      // handle any type of exception not handled by above catches
+   ].