This exact concept has been done multiple times. And it never worked, because the syntax was horrible. And it's just not convenient at all, it's good for toying around with interpreters and the likes but it has no purpose or use. See https://m.reddit.com/r/coding/comments/3akmn1/sums_this_rel_...
Syntax is a matter of opinion, JSONScript seems more concise than REL in the link.