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From: ken@rochester.arpa (Ken Yap)
Newsgroups: comp.sources.bugs
Subject: Re: yacc misfeature (was: Help needed for Logo on Unix)
Message-ID: <632@sol.ARPA>
Date: Sat, 18-Jul-87 01:26:33 EDT
Article-I.D.: sol.632
Posted: Sat Jul 18 01:26:33 1987
Date-Received: Sat, 18-Jul-87 18:59:17 EDT
References: <1740@encore.UUCP> <330@rabbit1.UUCP> <1649@sfsup.UUCP>
Reply-To: ken@rochester.UUCP (Ken Yap)
Organization: U of Rochester, CS Dept, Rochester, NY
Lines: 16

Speaking of yacc bugs, how come nobody has complained about this one?

In the parser skeleton there are a few lines like this

#ifndef	YYSTYPE
#define	YYSTYPE	int
#endif

When the %union feature is used, this creates a union typedef for
YYSTYPE.  Unfortunately, a typedef is not a #define and the default
type isn't overidden. In the end I sent y.tab.c through a sed script to
remove the #define.

Maybe people don't use %union that much? It really is nifty.

	Ken