BISON(1)                     UNIX System V(local)                      BISON(1)


NAME
      bison - GNU Project parser generator (yacc replacement)

SYNOPSIS
      bison [ -dlvty ] 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.

      Bison takes five optional flags.

      -d    Produce a .tab.h file, similar to yacc's y.tab.h file.

      -l    Omit #line lines in the parser output file. Error messages from the
            C compiler will then be associated with lines in the parser output
            file, instead of lines in the original grammar file.

      -t    Turn on debugging. This option causes the bison output to have
            debugging code made available via the C pre-processor.  The
            external variable yydebug should be made non-zero to have the
            debugging code actually produce output.

      -v    Be verbose. Analogous to the same flag for yacc.

      -y    Use fixed output file names. I.e., force the output to be in files
            y.tab.c, y.tab.h, and so on. This is for full yacc compatibility.

FILES
      /usr/dell/bison/lib/bison.simple    simple parser
      /usr/dell/bison/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.''









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