Initial data commit

Task/Flow-control-structures/D/flow-control-structures-2.d

@@ -0,0 +1,22 @@
+import std.stdio;
+
+class DerivedException : Exception {
+    this(string msg) { super(msg); }
+}
+
+void main(string[] args) {
+    try {
+        if (args[1] == "throw")
+            throw new Exception("message");
+    } catch (DerivedException ex) {
+        // We never threw a DerivedException, so this
+        // block is never called.
+        writefln("caught derived exception %s", ex);
+    } catch (Exception ex) {
+        writefln("caught exception: %s", ex);
+    } catch (Throwable ex) {
+        writefln("caught throwable: %s", ex);
+    } finally {
+        writeln("finished (exception or none).");
+    }
+}