bison (GNU Bison) 3.5
Written by Robert Corbett and Richard Stallman.

Copyright (C) 2019 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.
Usage: bison [OPTION]... FILE
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

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