This manual (23 January 2015) is for GNU Bison (version 3.0.4), the GNU parser generator. Copyright © 1988-1993, 1995, 1998-2015 Free Software Foundation, Inc.
Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables. As an experimental feature, Bison can also generate IELR(1) or canonical LR(1) parser tables. Once you are proficient with Bison, you can use it to develop a wide range of language parsers, from those used in simple desk calculators to complex programming languages.