Added overloaded_assignment keyword to all relevant

generate_assignment_code signatures so that subclassing will work properly
when first building Cython.

Cython/Compiler/ExprNodes.py

@@ -672,7 +672,7 @@ class ExprNode(Node):
         else:
             self.generate_subexpr_disposal_code(code)
 
-    def generate_assignment_code(self, rhs, code):
+    def generate_assignment_code(self, rhs, code, overloaded_assignment=False):
         #  Stub method for nodes which are not legal as
         #  the LHS of an assignment. An error will have
         #  been reported earlier.
@@ -3761,7 +3761,7 @@ class IndexNode(ExprNode):
             # Simple case
             code.putln("*%s %s= %s;" % (ptrexpr, op, rhs.result()))
 
-    def generate_assignment_code(self, rhs, code):
+    def generate_assignment_code(self, rhs, code, overloaded_assignment=False):
         generate_evaluation_code = (self.is_memslice_scalar_assignment or
                                     self.memslice_slice)
         if generate_evaluation_code:
@@ -4221,7 +4221,7 @@ class SliceIndexNode(ExprNode):
                     code.error_goto_if_null(result, self.pos)))
         code.put_gotref(self.py_result())
 
-    def generate_assignment_code(self, rhs, code):
+    def generate_assignment_code(self, rhs, code, overloaded_assignment=False):
         self.generate_subexpr_evaluation_code(code)
         if self.type.is_pyobject:
             code.globalstate.use_utility_code(self.set_slice_utility_code)
@@ -6190,7 +6190,7 @@ class AttributeNode(ExprNode):
         else:
             ExprNode.generate_disposal_code(self, code)
 
-    def generate_assignment_code(self, rhs, code):
+    def generate_assignment_code(self, rhs, code, overloaded_assignment=False):
         self.obj.generate_evaluation_code(code)
         if self.is_py_attr:
             code.globalstate.use_utility_code(
@@ -6527,7 +6527,7 @@ class SequenceNode(ExprNode):
             if self.mult_factor:
                 self.mult_factor.generate_disposal_code(code)
 
-    def generate_assignment_code(self, rhs, code):
+    def generate_assignment_code(self, rhs, code, overloaded_assignment=False):
         if self.starred_assignment:
             self.generate_starred_assignment_code(rhs, code)
         else: