bionic (1) bison.1.gz

NAME

       bison - GNU Project parser generator (yacc replacement)

SYNOPSIS

       bison  [  -b  file-prefix ] [ --file-prefix=file-prefix ] [ -d ] [ --defines ] [ -l ] [ --no-lines ] [ -o
       outfile ] [ --output-file=outfile ] [ -p prefix ] [ --name-prefix=prefix ] [ -t ] [ --debug ] [  -v  ]  [
       --verbose ] [ -V ] [ --version ] [ -y ] [ --yacc ] [ --fixed-output-files ] 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.  For instance, a grammar description file
       named parse.y would produce the generated parser in a file named parse.tab.c, instead of yacc's y.tab.c.

       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 =.

   OPTIONS
       -b file-prefix
       --file-prefix=file-prefix
              Specify a prefix to use for all bison output file names.  The names are chosen  as  if  the  input
              file were named file-prefix.c.

       -d
       --defines
              Write  an  extra  output file containing macro definitions for the token type names defined in the
              grammar and the semantic value type YYSTYPE, as well as a few extern variable declarations.

              If the parser output file is named name.c then this file is named name.h.

              This output file is essential if you wish to put the definition of  yylex  in  a  separate  source
              file, because yylex needs to be able to refer to token type codes and the variable yylval.

       -l
       --no-lines
              Don't  put  any #line preprocessor commands in the parser file.  Ordinarily bison puts them in the
              parser file so that the C compiler and debuggers will associate errors with your source file,  the
              grammar  file.   This  option causes them to associate errors with the parser file, treating it an
              independent source file in its own right.

       -o outfile
       --output-file=outfile
              Specify the name outfile for the parser file.

              The other output files' names are constructed from outfile  as  described  under  the  -v  and  -d
              switches.

       -p prefix
       --name-prefix=prefix
              Rename  the external symbols used in the parser so that they start with prefix instead of yy.  The
              precise list of symbols renamed is yyparse, yylex, yyerror, yylval, yychar, and yydebug.

              For example, if you use -p c, the names become cparse, clex, and so on.

       -t
       --debug
              Output a definition of the macro YYDEBUG into the parser file, so that  the  debugging  facilities
              are compiled.

       -v
       --verbose
              Write  an  extra output file containing verbose descriptions of the parser states and what is done
              for each type of look-ahead token in that state.

              This file also describes all the conflicts, both those resolved by  operator  precedence  and  the
              unresolved ones.

              The  file's  name  is  made  by removing .tab.c or .c from the parser output file name, and adding
              .output instead.

              Therefore, if the input file is foo.y, then the parser file is called foo.tab.c by default.  As  a
              consequence, the verbose output file is called foo.output.

       -V
       --version
              Print the version number of bison.

       -y
       --yacc
       --fixed-output-files
              Equivalent  to  -o  y.tab.c;  the  parser output file is called y.tab.c, and the other outputs are
              called y.output and y.tab.h.  The purpose of this switch is to imitate  yacc's  output  file  name
              conventions.  Thus, the following shell script can substitute for yacc:

              bison -y $*

       The  long-named  options  can  be  introduced  with  `+' as well as `--', for compatibility with previous
       releases.  Eventually support for `+' will be removed,  because  it  is  incompatible  with  the  POSIX.2
       standard.

FILES

       /usr/local/lib/bison.simple   simple parser
       /usr/local/lib/bison.hairy    complicated parser

SEE ALSO

       yacc(1)
       The Bison Reference Manual, included as the file bison.texinfo in the bison source distribution.

DIAGNOSTICS

       Self explanatory.

                                                      local                                             BISON(1)