Update examples

testsuite/objc/expression_parser/MyDocument.h

@@ -0,0 +1,16 @@
+/* MyDocument */
+
+#import <Cocoa/Cocoa.h>
+
+#include "RunHaskell.h"
+
+@interface MyDocument : NSDocument
+{
+    IBOutlet id evaluation;
+    IBOutlet id expressionEntry;
+    IBOutlet id parser;
+}
+- (IBAction)chooseParser:(id)sender;
+- (IBAction)evaluateExpression:(id)sender;
+
+@end