Fix type inference for comparison operations with cpp types

Cython/Compiler/ExprNodes.py

@@ -13164,11 +13164,20 @@ class PrimaryCmpNode(ExprNode, CmpNode):
     def infer_type(self, env):
         type1 = self.operand1.infer_type(env)
         type2 = self.operand2.infer_type(env)
+        operator = self.operator
 
         if is_pythran_expr(type1) or is_pythran_expr(type2):
             if is_pythran_supported_type(type1) and is_pythran_supported_type(type2):
                 return PythranExpr(pythran_binop_type(self.operator, type1, type2))
 
+        cpp_type = None
+        if type1.is_cpp_class or type1.is_ptr:
+            cpp_type = type1.find_cpp_operation_type(operator, type2)
+        if cpp_type is None and (type2.is_cpp_class or type2.is_ptr):
+            cpp_type = type2.find_cpp_operation_type(operator, type1)
+        if cpp_type is not None:
+            return cpp_type
+
         # TODO: implement this for other types.
         return py_object_type