BISON(1)			 User Commands			      BISON(1)

NAME
       bison - GNU Project parser generator (yacc replacement)

SYNOPSIS
       bison [OPTION]... FILE

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
       parse.tab.cxx, instead of yacc's y.tab.c or old Bison version's
       parse.tab.c.

       This description of the options that can be given to bison is adapted
       from the node Invocation in the bison.texi 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 a deterministic LR or generalized LR (GLR) parser employing
       LALR(1), IELR(1), or canonical LR(1) parser tables.

       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 and exit

       --print-datadir
	      output directory containing skeletons and XSLT and exit

       -u, --update
	      apply fixes to the source grammar file and exit

       -f, --feature[=FEATURES]
	      activate miscellaneous features

   FEATURES is a list of comma separated words that can include:
       caret, diagnostics-show-caret
	      show errors with carets

       fixit, diagnostics-parseable-fixits
	      show machine-readable fixes

       syntax-only
	      do not generate any file

       all    all of the above

       none   disable all of the above

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

       --color[=WHEN]
	      whether to colorize the diagnostics

       --style=FILE
	      specify the CSS FILE for colorizer diagnostics

   Warning categories include:
       conflicts-sr
	      S/R conflicts (enabled by default)

       conflicts-rr
	      R/R conflicts (enabled by default)

       counterexamples, cex
	      generate conflict counterexamples

       dangling-alias
	      string aliases not attached to a symbol

       deprecated
	      obsolete constructs

       empty-rule
	      empty rules without %empty

       midrule-values
	      unset or unused midrule values

       precedence
	      useless precedence and associativity

       yacc   incompatibilities with POSIX Yacc

       other  all other warnings (enabled by default)

       all    all the warnings except 'counterexamples', 'dangling-alias' and
	      'yacc'

       no-CATEGORY
	      turn off warnings in CATEGORY

       none   turn off all the warnings

       error[=CATEGORY]
	      treat warnings as errors

   WHEN can be one of the following:
       always, yes
	      colorize the output

       never, no
	      don't colorize the output

       auto, tty
	      colorize if the output device is a tty

   Tuning the Parser:
       -L, --language=LANGUAGE
	      specify the output programming language

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

       -t, --debug
	      instrument the parser for tracing same as '-Dparse.trace'

       --locations
	      enable location support

       -D, --define=NAME[=VALUE]
	      similar to '%define NAME VALUE'

       -F, --force-define=NAME[=VALUE]
	      override '%define NAME VALUE'

       -p, --name-prefix=PREFIX
	      prepend PREFIX to the external symbols deprecated by
	      '-Dapi.prefix={PREFIX}'

       -l, --no-lines
	      don't generate '#line' directives

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

       -y, --yacc
	      emulate POSIX Yacc

   Output Files:
       -H, --header=[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

       --html[=FILE]
	      also output an HTML report of the automaton

       -x, --xml[=FILE]
	      also output an XML report of the automaton

       -M, --file-prefix-map=OLD=NEW replace prefix OLD with NEW when writing
       file paths
	      in output files

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

       itemsets
	      complete the core item sets with their closure

       lookaheads
	      explicitly associate lookahead tokens to items

       solved describe shift/reduce conflicts solving

       counterexamples, cex
	      generate conflict counterexamples

       all    include all the above information

       none   disable the report

AUTHOR
       Written by Robert Corbett and Richard Stallman.

REPORTING BUGS
       Report bugs to <bug-bison@gnu.org>.
       GNU Bison home page: <https://www.gnu.org/software/bison/>.
       General help using GNU software: <https://www.gnu.org/gethelp/>.
       For complete documentation, run: info bison.

COPYRIGHT
       Copyright © 2021 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.

GNU Bison 3.8.2			September 2021			      BISON(1)