Improve cpp11_function_objects test for python

Examples/test-suite/cpp11_function_objects.i

@@ -3,25 +3,31 @@
    Function objects are objects which overload the operator() function.
    The std::function does not provide any seamless support in the target languages yet.
 */
-%module cpp11_function_objects
+%module(directors="1") cpp11_function_objects
 
 %rename(__call__) Test::operator();
 
+%feature("director") Test;
+
 %inline %{
-struct Test {
+class Test {
+public:
   int value;
   
-  void operator()(int x, int y) {
+  virtual void operator()(int x, int y) {
     value=x+y;
   }
   Test() : value(0) {}
-} test;
+  ~Test() {}
+};
+
+Test test;
 
 #include <functional>
 std::function<void ( int, int )> pF = test;
 
-int testit1(Test new_test, int a, int b) {
-  pF = new_test;
+int testit1(Test &new_test, int a, int b) {
+  pF = std::ref(new_test);
   pF(a, b);
   return new_test.value;
 }

Examples/test-suite/python/cpp11_function_objects_runme.py

@@ -1,6 +1,13 @@
 import cpp11_function_objects
 import sys
 
+class Test1(cpp11_function_objects.Test):
+    def __init__(self):
+        cpp11_function_objects.Test.__init__(self)
+
+    def __call__(self, a, b):
+        self.value = a * b
+
 t = cpp11_function_objects.Test()
 if t.value != 0:
 	raise RuntimeError("Runtime cpp11_function_objects failed. t.value should be 0, but is " + str(t.value))
@@ -10,3 +17,7 @@ t(1,2) # adds numbers and sets value
 if t.value != 3:
 	raise RuntimeError("Runtime cpp11_function_objects failed. t.value not changed - should be 3, but is " + str(t.value))
  
+t2 = Test1()
+a = cpp11_function_objects.testit1(t2, 4,3)
+if a != 12:
+	raise RuntimeError("Runtime cpp11_function_objects failed. t.value not changed - should be 12, but is " + str(a))