Replaced structs with classes

src/runtime/dict.h

@@ -21,7 +21,8 @@
 namespace pyston {
 
 extern BoxedClass* dict_iterator_cls;
-struct BoxedDictIterator : public Box {
+class BoxedDictIterator : public Box {
+public:
     enum IteratorType { KeyIterator, ValueIterator, ItemIterator };
 
     BoxedDict* d;

src/runtime/list.h

@@ -21,7 +21,8 @@
 namespace pyston {
 
 extern BoxedClass* list_iterator_cls;
-struct BoxedListIterator : public Box {
+class BoxedListIterator : public Box {
+public:
     BoxedList* l;
     int pos;
     BoxedListIterator(BoxedList* l);

src/runtime/tuple.h

@@ -21,7 +21,8 @@
 namespace pyston {
 
 extern BoxedClass* tuple_iterator_cls;
-struct BoxedTupleIterator : public Box {
+class BoxedTupleIterator : public Box {
+public:
     BoxedTuple* t;
     int pos;
     BoxedTupleIterator(BoxedTuple* t);