.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.48.4. .TH BISON "1" "September 2021" "GNU Bison 3.8.2" "User Commands" .SH NAME bison \- GNU Project parser generator (yacc replacement) .SH SYNOPSIS .B bison [\fI\,OPTION\/\fR]... \fI\,FILE\/\fR .SH DESCRIPTION .I Bison is a parser generator in the style of .IR yacc (1). It should be upwardly compatible with input files designed for .IR yacc . .PP Input files should follow the .I yacc convention of ending in .BR .y . Unlike .IR yacc , the generated files do not have fixed names, but instead use the prefix of the input file. Moreover, if you need to put .I 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 .B parse.yxx would produce the generated parser in a file named .BR parse.tab.cxx , instead of .IR yacc 's .B y.tab.c or old .I Bison version's .BR parse.tab.c . .PP This description of the options that can be given to .I bison is adapted from the node .B Invocation in the .B bison.texi manual, which should be taken as authoritative. .PP .I Bison supports both traditional single-letter options and mnemonic long option names. Long option names are indicated with .B \-\- instead of .BR \- . Abbreviations for option names are allowed as long as they are unique. When a long option takes an argument, like .BR \-\-file-prefix , connect the option name and the argument with .BR = . .PP Generate a deterministic LR or generalized LR (GLR) parser employing LALR(1), IELR(1), or canonical LR(1) parser tables. .PP Mandatory arguments to long options are mandatory for short options too. The same is true for optional arguments. .SS "Operation Modes:" .TP \fB\-h\fR, \fB\-\-help\fR display this help and exit .TP \fB\-V\fR, \fB\-\-version\fR output version information and exit .TP \fB\-\-print\-localedir\fR output directory containing locale\-dependent data and exit .TP \fB\-\-print\-datadir\fR output directory containing skeletons and XSLT and exit .TP \fB\-u\fR, \fB\-\-update\fR apply fixes to the source grammar file and exit .TP \fB\-f\fR, \fB\-\-feature\fR[=\fI\,FEATURES\/\fR] activate miscellaneous features .SS "FEATURES is a list of comma separated words that can include:" .TP caret, diagnostics\-show\-caret show errors with carets .TP fixit, diagnostics\-parseable\-fixits show machine\-readable fixes .TP syntax\-only do not generate any file .TP all all of the above .TP none disable all of the above .SS "Diagnostics:" .TP \fB\-W\fR, \fB\-\-warnings\fR[=\fI\,CATEGORY\/\fR] report the warnings falling in CATEGORY .TP \fB\-\-color\fR[=\fI\,WHEN\/\fR] whether to colorize the diagnostics .TP \fB\-\-style\fR=\fI\,FILE\/\fR specify the CSS FILE for colorizer diagnostics .SS "Warning categories include:" .TP conflicts\-sr S/R conflicts (enabled by default) .TP conflicts\-rr R/R conflicts (enabled by default) .TP counterexamples, cex generate conflict counterexamples .TP dangling\-alias string aliases not attached to a symbol .TP deprecated obsolete constructs .TP empty\-rule empty rules without %empty .TP midrule\-values unset or unused midrule values .TP precedence useless precedence and associativity .TP yacc incompatibilities with POSIX Yacc .TP other all other warnings (enabled by default) .TP all all the warnings except 'counterexamples', 'dangling\-alias' and 'yacc' .TP no\-CATEGORY turn off warnings in CATEGORY .TP none turn off all the warnings .TP error[=CATEGORY] treat warnings as errors .SS "WHEN can be one of the following:" .TP always, yes colorize the output .TP never, no don't colorize the output .TP auto, tty colorize if the output device is a tty .SS "Tuning the Parser:" .TP \fB\-L\fR, \fB\-\-language\fR=\fI\,LANGUAGE\/\fR specify the output programming language .TP \fB\-S\fR, \fB\-\-skeleton\fR=\fI\,FILE\/\fR specify the skeleton to use .TP \fB\-t\fR, \fB\-\-debug\fR instrument the parser for tracing same as '\-Dparse.trace' .TP \fB\-\-locations\fR enable location support .TP \fB\-D\fR, \fB\-\-define=NAME\fR[=\fI\,VALUE\/\fR] similar to '%define NAME VALUE' .TP \fB\-F\fR, \fB\-\-force\-define=NAME\fR[=\fI\,VALUE\/\fR] override '%define NAME VALUE' .TP \fB\-p\fR, \fB\-\-name\-prefix\fR=\fI\,PREFIX\/\fR prepend PREFIX to the external symbols deprecated by '\-Dapi.prefix={PREFIX}' .TP \fB\-l\fR, \fB\-\-no\-lines\fR don't generate '#line' directives .TP \fB\-k\fR, \fB\-\-token\-table\fR include a table of token names .TP \fB\-y\fR, \fB\-\-yacc\fR emulate POSIX Yacc .SS "Output Files:" .TP \fB\-H\fR, \fB\-\-header\fR=\fI\,[FILE]\/\fR also produce a header file .TP \fB\-d\fR likewise but cannot specify FILE (for POSIX Yacc) .TP \fB\-r\fR, \fB\-\-report\fR=\fI\,THINGS\/\fR also produce details on the automaton .TP \fB\-\-report\-file\fR=\fI\,FILE\/\fR write report to FILE .TP \fB\-v\fR, \fB\-\-verbose\fR same as '\-\-report=state' .TP \fB\-b\fR, \fB\-\-file\-prefix\fR=\fI\,PREFIX\/\fR specify a PREFIX for output files .TP \fB\-o\fR, \fB\-\-output\fR=\fI\,FILE\/\fR leave output to FILE .TP \fB\-g\fR, \fB\-\-graph\fR[=\fI\,FILE\/\fR] also output a graph of the automaton .TP \fB\-\-html\fR[=\fI\,FILE\/\fR] also output an HTML report of the automaton .TP \fB\-x\fR, \fB\-\-xml\fR[=\fI\,FILE\/\fR] also output an XML report of the automaton .TP \fB\-M\fR, \fB\-\-file\-prefix\-map\fR=\fI\,OLD=NEW\/\fR replace prefix OLD with NEW when writing file paths in output files .SS "THINGS is a list of comma separated words that can include:" .TP states describe the states .TP itemsets complete the core item sets with their closure .TP lookaheads explicitly associate lookahead tokens to items .TP solved describe shift/reduce conflicts solving .TP counterexamples, cex generate conflict counterexamples .TP all include all the above information .TP none disable the report .SH AUTHOR Written by Robert Corbett and Richard Stallman. .SH "REPORTING BUGS" Report bugs to . .br GNU Bison home page: . .br General help using GNU software: . .br For complete documentation, run: info bison. .SH COPYRIGHT Copyright \(co 2021 Free Software Foundation, Inc. .br This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. .SH "SEE ALSO" .BR lex (1), .BR flex (1), .BR yacc (1). .PP The full documentation for .B bison is maintained as a Texinfo manual. If the .B info and .B bison programs are properly installed at your site, the command .IP .B info bison .PP should give you access to the complete manual.