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NAME bison - GNU Project parser generator (yacc replacement)


DESCRIPTION Bison is a parser generator in the style of yacc(1). It should be upwardly compatible with input files designed for yacc.

Input files should follow the yacc convention of ending in .y. Unlike yacc, the generated files do not have fixed names, but instead use the prefix of the input file. Moreover, if you need to put C++ code in the input file, you can end his name by a C++-like extension (.ypp or .y++), then bison will follow your extension to name the output file (.cpp or .c++). For instance, a grammar description file named parse.yxx would produce the generated parser in a file named, instead of yacc s or old Bison versions

This description of the options that can be given to bison is adapted from the node Invocation in the bison.texinfo manual, which should be taken as authoritative.

Bison supports both traditional single-letter options and mnemonic long option names. Long option names are indicated with -- instead of -. Abbreviations for option names are allowed as long as they are unique. When a long option takes an argument, like --file-prefix, connect the option name and the argument with =.

Generate LALR(1) and GLR parsers.

Mandatory arguments to long options are mandatory for short options too. The same is true for optional arguments.

Operation modes: -h, --help display this help and exit

-V, --version output version information and exit

--print-localedir output directory containing locale-dependent data

--print-datadir output directory containing skeletons and XSLT

-y, --yacc emulate POSIX Yacc

-W, --warnings=[CATEGORY] report the warnings falling in CATEGORY

Parser: -L, --language=LANGUAGE specify the output programming language (this is an experimental feature)

-S, --skeleton=FILE specify the skeleton to use

-t, --debug instrument the parser for debugging

--locations enable locations computation

-p, --name-prefix=PREFIX prepend PREFIX to the external symbols

-l, --no-lines dont generate #line directives

-k, --token-table include a table of token names

Output: --defines[=FILE] also produce a header file

-d likewise but cannot specify FILE (for POSIX Yacc)

-r, --report=THINGS also produce details on the automaton

--report-file=FILE write report to FILE

-v, --verbose same as --report=state

-b, --file-prefix=PREFIX specify a PREFIX for output files

-o, --output=FILE leave output to FILE

-g, --graph[=FILE] also output a graph of the automaton

-x, --xml[=FILE] also output an XML report of the automaton (the XML schema is experimental)

Warning categories include: midrule-values unset or unused midrule values

yacc incompatibilities with POSIX YACC

all all the warnings

no-CATEGORY turn off warnings in CATEGORY

none turn off all the warnings

error treat warnings as errors

THINGS is a list of comma separated words that can include: state describe the states

itemset complete the core item sets with their closure

lookahead explicitly associate lookahead tokens to items

solved describe shift/reduce conflicts solving

all include all the above information

none disable the report

AUTHOR Written by Robert Corbett and Richard Stallman.

REPORTING BUGS Report bugs to <>.

COPYRIGHT Copyright © 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO lex(1), flex(1), yacc(1).

The full documentation for bison is maintained as a Texinfo manual. If the info and bison programs are properly installed at your site, the command

info bison

should give you access to the complete manual.

bison 2.4.1 December 2008 BISON(1)