The Sam language and editor may be of interest: http://sam.cat-v.org http://sam.cat-v.org http://doc.cat-v.org/plan_9/4th_edition/papers/sam http://doc.cat-v.

The Sam language and editor may be of interest: http://sam.cat-v.org http://sam.cat-v.org http://doc.cat-v.org/plan_9/4th_edition/papers/sam http://doc.cat-v.org/plan_9/4th_edition/papers/sam