/*************************************************************************\ * Copyright (c) 2002 The University of Chicago, as Operator of Argonne * National Laboratory. * Copyright (c) 2002 The Regents of the University of California, as * Operator of Los Alamos National Laboratory. * EPICS BASE Versions 3.13.7 * and higher are distributed subject to a Software License Agreement found * in file LICENSE that is included with this distribution. \*************************************************************************/

NAME

     Yacc - an LALR(1) parser generator

SYNOPSIS

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

DESCRIPTION

     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 y.tab.c.

     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 y.tab.h to be
               written.

          -l   If the -l  option  is  not  specified,  yacc  will
               insert  #line  directives  in  the generated code.
               The #line directives let  the  C  compiler  relate
               errors  in the generated code to the user's origi-
               nal code.  If the -l  option  is  specified,  yacc
               will  not  insert  the  #line  directives.   #line
               directives specified by the user will be retained.

          -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 y.tab.c.

          -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 created.

FILES

     y.code.c
     y.tab.c
     y.tab.h
     y.output
     /tmp/yacc.aXXXXXX
     /tmp/yacc.tXXXXXX
     /tmp/yacc.uXXXXXX

DIAGNOSTICS

     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.

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