can we implement the updatable view through rule system?

Hi, all
Many talks have been dealed with the updatable view.
In postgresql, It seems that we can use the powerful rule system
to implement the update, insert, delete on view.
But could we give a generalized update rule for a view?
For example, we can construct the following rule:
create table data(a int,b int,c int);
create view view_data as select * from data where c=0;

CREATE RULE view_data_update AS ON UPDATE TO view_data
DO INSTEAD
UPDATE data SET
a=(NEW.c),
b=(NEW.c);

If we submit the query" update view data set a=1 where b=2", we could not
rely on the "view_data_update" to finish the task. and I can not find how I can
find a correct generalized rule to implement the update on view.

In addition, could we just rely on the rule system to implement the updatable
view with "check option"?

Please give me some hint if you have some free time.

Best regards

Josh