Package: bison Maintainer: Darwin Developers <email@example.com> Vendor: GNU Project Version: 1.28 URL: ftp://prep.ai.mit.edu/pub/gnu/bison/ Build-Depends: build-base, perl Description: Bison parser generator Bison is a general-purpose parser generator that converts a grammar description for an LALR(1) context-free grammar into a C program to parse that grammar. Once you are proficient with Bison, you may use it to develop a wide range of language parsers, from those used in simple desk calculators to complex programming languages. . Bison is upward compatible with Yacc: all properly-written Yacc grammars ought to work with Bison with no change. Anyone familiar with Yacc should be able to use Bison with little trouble.