Lemon is an infinitely better parser generator than Yacc; it solves a lot of the issues that make Yacc terrible to work with: named non-terminals, non-terminal

Lemon is an infinitely better parser generator than Yacc; it solves a lot of the issues that make Yacc terrible to work with: named non-terminals, non-terminal destructors, re-entrancy, etc. It's part of the SQLite codebase. Highly recommended. In many cases, though, I think parser combinators thread the needle elegantly - nom in Rust for instance. Or even just a hand-rolled LL(1).