Fix iteration over cypclass containers

Cython/Compiler/ExprNodes.py

@@ -2884,7 +2884,11 @@ class IteratorNode(ExprNode):
 
     def generate_result_code(self, code):
         sequence_type = self.sequence.type
-        if sequence_type.is_cpp_class:
+        if sequence_type.is_cyp_class:
+            begin_func = "%s->begin" % self.sequence.result()
+            code.putln("%s = %s();" % (self.result(), begin_func))
+            return
+        elif sequence_type.is_cpp_class:
             if self.sequence.is_name:
                 # safe: C++ won't allow you to reassign to class references
                 begin_func = "%s.begin" % self.sequence.result()
@@ -2991,7 +2995,17 @@ class IteratorNode(ExprNode):
         sequence_type = self.sequence.type
         if self.reversed:
             code.putln("if (%s < 0) break;" % self.counter_cname)
-        if sequence_type.is_cpp_class:
+        if sequence_type.is_cyp_class:
+            end_func = "%s->end" % self.sequence.result()
+            code.putln("if (!(%s != %s())) break;" % (
+                            self.result(),
+                            end_func))
+            code.putln("%s = *%s;" % (
+                            result_name,
+                            self.result()))
+            code.putln("++%s;" % self.result())
+            return
+        elif sequence_type.is_cpp_class:
             if self.cpp_iterator_cname:
                 end_func = "%s->end" % self.cpp_iterator_cname
             else: