Planck: A Small Parser Combinator Library for OCaml I have released Planck, a small monadic parser combinators for OCaml. It includes a proof of implementation: OCaml syntax lexer and a parser which create 100% identical AST as the original OCaml's lex+yacc, and available at https://bitbucket.org/camlspotter/planck . http://camlspotter.blogspot.com/2011/05/planck-small-parser-combinator-library.ht