Adds support for Duck Punching (aka Monkey Patching).

The simplest definition of duck punching for our purposes is
the ability to change the definition of a method in an instance of
a class.
To allow this behaviour the SbkBaseWrapper structure had to be
extended with a 'ob_dict' which is a PyObject pointer to the instance
dictionary. It is originally set to NULL until the user tries to access
it. This dictionary could be accessed through the '__dict__' instance
property. For now it is read-only.

The generator was updated to handle the instance dictionary, and an
extensive duck punching test was also added.

Reviewed by Hugo Parente Lima <hugo.lima@openbossa.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/libshiboken/bindingmanager.cpp b/libshiboken/bindingmanager.cpp
index 786dade29..bce8d3656 100644
--- a/libshiboken/bindingmanager.cpp
+++ b/libshiboken/bindingmanager.cpp
@@ -131,6 +131,14 @@ PyObject* BindingManager::getOverride(const void* cptr, const char* methodName)
     if (!wrapper)
         return 0;
 
+    if (SbkBaseWrapper_instanceDict(wrapper)) {
+        PyObject* method = PyDict_GetItemString(SbkBaseWrapper_instanceDict(wrapper), methodName);
+        if (method) {
+            Py_INCREF(method);
+            return method;
+        }
+    }
+
     PyObject* pyMethodName = PyString_FromString(methodName);
     PyObject* method = PyObject_GetAttr(wrapper, pyMethodName);