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A GNU general-purpose 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. Bison can be used to develop a wide range of language parsers, from ones used in simple desk calculators to complex programming languages. Bison is upwardly compatible with Yacc, so any correctly written Yacc grammar should work with Bison without any changes. If you know Yacc, you shouldn't have any trouble using Bison. You do need to be very proficient in C programming to be able to use Bison. Bison is only needed on systems that are used for development.

If your system will be used for C development, you should install Bison.

Package version:2.3


-*- outline -*-

This directory contains Bison skeletons: the general shapes of the
different parser kinds, that are specialized for specific grammars by
the bison program.

Currently, there are only three supported skeletons:

- yacc.c
  It used to be named bison.simple: it corresponds to C Yacc
  compatible LALR(1) parsers.

  Produces a C++ parser class.  It is still very experimenta


This directory contains the Bison parser generator.

See the file INSTALL for generic compilation and installation instructions.
See the file doc/FAQ for frequently asked questions.

Bison requires GNU m4 1.4.3 or later.  See:

Bison can work with pre-1.4.3 distributions of GNU m4 if they are
sufficiently patched, but if you encounter a bug with an older


Bison News

Changes in version 2.3, 2006-06-05:

* GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING',
  for compatibility with LALR(1) grammars.

* It is now documented that any definition of YYSTYPE or YYLTYPE should
  be to a type name that does not contain parentheses or brackets.

Changes in version 2.2, 2006-05-19:

* The distribution terms for all Bison-gener


BISON(1)                                                    BISON(1)

       bison - GNU Proj


2006-06-05  Paul Eggert  <>

	* NEWS: Version 2.3.
	* (AC_INIT): Like


-*- outline -*-

* Header guards

From Franc,ois: should we keep the directory part in the CPP guard


Authors of GNU Bison.

Bison was written primarily by Robert Corbett.

Richard Stallman made it Yacc


Bison was originally written by Robert Corbett.  It would not be what
it is today without the invalu

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