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Path: utzoo!decvax!cca!ima!compilers
From: compilers@ima.UUCP
Newsgroups: mod.compilers
Subject: PD yacc
Message-ID: <136300024@ima.UUCP>
Date: Mon, 6-Jan-86 22:14:00 EST
Article-I.D.: ima.136300024
Posted: Mon Jan  6 22:14:00 1986
Date-Received: Wed, 8-Jan-86 02:44:59 EST
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Approved: compilers@ima.uucp
Nf-ID: #N:ima:136300024:000:855
Nf-From: ima!compilers    Jan  6 22:14:00 1986


[from ihnp4!decvax!cwruecmp!bammi (Jwahar R. Bammi)]

I saw people discussing Public Domain compiler tools (wart etc) on
this group. I don't know if it is widely known that a Public domain
Yacc, called Bison is available from the GNU project (free software
foundation). It has two types of parser skeletons, controlled
by the presence of the directive '%semantic_parser'. The default, when
the directive is absent, is a Yacc compatible parser. There is one bug
that I have found. You cannot use the declaration
	%token <type> TERMINAL
	where type is the name of a member of the union type that the
lex. analyser returns. However
	%type <type> non-terminal
	works fine.
Another problem is the lack of documentation, but I guess there will
be some shortly. The version I am using is a few months old. Anyone
know if there has been a newer release?
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