Re: YACC with infinite lookahead

Vladimir Makarov <vmakarov@cygnus.com>
21 May 1999 02:26:41 -0400

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From: Vladimir Makarov <vmakarov@cygnus.com>
Newsgroups: comp.compilers
Date: 21 May 1999 02:26:41 -0400
Organization: Cygnus Solutions
References: 99-05-072 99-05-087
Keywords: parse

> >>Someone know if there exists a version of YACC with infinite lookahead?
>
> You can try Backtraking Yacc (http://www.siber.com/btyacc/) or YAY
> (http://www.thinkage.on.ca/shareware/yay/files.html).
> Backtraking Yacc generates parsers with backtraking capabilities and YAY can
> generate parsers for LALR(2) grammars and both accept Yacc's grammar
> notation.


  You could try also MSTA. This is part of COCOM toolset. MSTA
accepts Yacc's grammars too and can generate LALR(k) and LR(k)-parsers
for any k>0. You also can control look ahead length for given
conflicts with special sentence %la <look ahead number>. The toolset
is placed on


htpp://visitweb/cocom
or
http://www.geocities.com/SiliconValley/Lab/4557/download.html


Vladimir Makarov

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