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)

       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 '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:
       --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

   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

       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: <http://www.gnu.org/gethelp/>.

       Report translation bugs to <http://translationproject.org/team/>.
       For complete documentation, run: info bison.

COPYRIGHT

       Copyright © 2020 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.