Cleanup inconsistencies

- delete unneeded frame primitives
- added missing __init__ to AbstractObject
- removed unused parameter from print_stack_trace
- pass instance of universe to get_class(.)
Signed-off-by: Stefan Marr <git@stefan-marr.de>

src/som/compiler/class_generation_context.py

@@ -86,6 +86,6 @@ class ClassGenerationContext(object):
         system_class.set_instance_fields(self._universe.new_array_from_list(self._instance_fields))
     
         # class-bound == class-instance-bound
-        super_mclass = system_class.get_class(self._universe.nilObject)
+        super_mclass = system_class.get_class(self._universe)
         super_mclass.set_instance_invokables(self._universe.new_array_from_list(self._class_methods))
         super_mclass.set_instance_fields(self._universe.new_array_from_list(self._class_fields))

src/som/interpreter/frame.py

@@ -143,7 +143,7 @@ class Frame(object):
         for i in range(0, num_args):
             self._stack[i] = frame.get_stack_element(num_args - 1 - i)
 
-    def print_stack_trace(self, nilObject):
+    def print_stack_trace(self):
         # Print a stack trace starting in this frame
         from som.vm.universe import std_print, std_println
         std_print(self.get_method().get_holder().get_name().get_string())

src/som/primitives/frame_primitives.py

-from som.primitives.primitives import Primitives
-from som.vmobjects.primitive   import Primitive
-
-def _method(ivkbl, frame, interpreter):
-    rcvr = frame.pop()
-    frame.push(rcvr.get_method())
-
-def _previous_frame(ivkbl, frame, interpreter):
-    rcvr = frame.pop()
-    frame.push(rcvr.get_previous_frame())
-
-class FramePrimitives(Primitives):
-    
-    def install_primitives(self):
-        self._install_instance_primitive(Primitive("method",
-                                         self._universe, _method))
-        self._install_instance_primitive(Primitive("previousFrame",
-                                         self._universe, _previous_frame))
- 
\ No newline at end of file

src/som/vmobjects/abstract_object.py

 class AbstractObject(object):
+    
+    def __init__(self):
+        pass
         
     def send(self, selector_string, arguments, universe, interpreter):
         # Turn the selector string into a selector