Seonglae Cho- Add disambiguous rules
- Rewrite the grammar
- Recursion Removal
- Replace one of the recurisons with the base case
- Precedence Cascade
- group operators of same precedence; write a different rule for each precedence group
ambiguous grammar may always produce unique AST
(but may produce different parse trees)
Inessential Ambiguity (okay)
- even for ambiguous grammar producing different ASTs
- Both carry the same semantics