actions before parsing rules in lex n yacc

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11-26-2008

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actions before parsing rules in lex n yacc

Hi ,

We have developed a grammer for our domain language using lex n yacc.
I want to know is there any pre defined lex-yacc function which gets call before executing any rule (or rules).
Oue requirement is, before processing any rule ,we want to perform some specific actions ?
is there any pre defined lex-yacc function which get call before processing rules?

In case of ANTLR (Another Tool for Language Recognition), we can specify actions before processing rule using a block "@init" . Is there anything like "@init" in lex n yacc ?

Regards,
Suprit

supritjain

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yacc

YACC(1) 							   User Commands							   YACC(1)

NAME

       yacc - GNU Project parser generator

SYNOPSIS

       yacc [OPTION]... FILE

DESCRIPTION

       Yacc (Yet Another Compiler Compiler) is a parser generator.  This version is a simple wrapper around bison(1).  It passes option -y, --yacc
       to activate the upward compatibility mode.  See bison(1) for more information.

AUTHOR

       Written by Paul Eggert.

REPORTING BUGS

       Report bugs to <bug-bison@gnu.org>.

COPYRIGHT

       Copyright (C) 2008 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       lex(1), flex(1), bison(1).

       The  full  documentation  for bison is maintained as a Texinfo manual.  If the info and bison programs are properly installed at your site,
       the command

	      info bison

       should give you access to the complete manual.

GNU Bison 2.4.1 						   November 2007							   YACC(1)

Programming