YACC(1)                     General Commands Manual                    YACC(1)

       Yacc - an LALR(1) parser generator

       yacc [ -dlrtv ] [ -b file_prefix ] [ -p symbol_prefix ] filename

       Yacc reads the grammar specification in the file filename and generates
       an LR(1) parser for it.  The parsers consist of a set of LALR(1)
       parsing tables and a driver routine written in the C programming
       language.  Yacc normally writes the parse tables and the driver routine
       to the file

       The following options are available:

              -b file_prefix
                     The -b option changes the prefix prepended to the output
                     file names to the string denoted by file_prefix.  The
                     default prefix is the character y.

              -d     The -d option causes the header file to be

              -l     If the -l option is not specified, yacc will insert The
                     generated code to the user's original code.  If the -l
                     option is specified, yacc will not insert the .TP -p
                     symbol_prefix The -p option changes the prefix prepended
                     to yacc-generated symbols to the string denoted by
                     symbol_prefix.  The default prefix is the string yy.

              -r     The -r option causes yacc to produce separate files for
                     code and tables.  The code file is named y.code.c, and
                     the tables file is named

              -t     The -t option changes the preprocessor directives
                     generated by yacc so that debugging statements will be
                     incorporated in the compiled code.

              -v     The -v option causes a human-readable description of the
                     generated parser to be written to the file y.output.

       If the environment variable TMPDIR is set, the string denoted by TMPDIR
       will be used as the name of the directory where the temporary files are


       If there are rules that are never reduced, the number of such rules is
       reported on standard error.  If there are any LALR(1) conflicts, the
       number of conflicts is reported on standard error.

4.3 Berkeley Distribution        July 15, 1990                         YACC(1)