Path: utzoo!attcan!uunet!decwrl!world!esegue!compilers-sender
From: amb@apple.com (A. Michael Burbidge)
Newsgroups: comp.compilers
Subject: How does the UCB pascal compiler handle optional semi-colons?
Keywords: parse, Pascal, question
Message-ID: <9010081549.AA17410@apple.com>
Date: 8 Oct 90 15:49:05 GMT
Sender: compilers-sender@esegue.segue.boston.ma.us
Reply-To: A. Michael Burbidge <amb@apple.com>
Organization: Compilers Central
Lines: 23
Approved: compilers@esegue.segue.boston.ma.us

Does anyone know how optional semi-colons are handled in the UCB
pascal compiler? The yacc specification does not appear to handle
them, but the compiler accepts them. For example, the yacc
specification for a record definition looks similar to the following.

record:		RECORD_TOKEN fields END_TOKEN

fields:		: field
		| fields ';' field
		;

The specification does not appear to accept a record definition whos
last field ends with a semi-colon.

Mike Burbidge
apple.com
[Not having seen the grammar, I'd expect to find either that it permits a
null field declaration, or that there's a gross lexical hack such as looking
ahead when it has a semicolon and discarding it if the next token is some sort
of end delimiter. -John]
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