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Path: utzoo!watmath!watnot!watmum!gvcormack
From: gvcormack@watmum.UUCP (Gordon V. Cormack)
Newsgroups: net.lang
Subject: Re: Varieties of conditional statement (parsing "if")
Message-ID: <296@watmum.UUCP>
Date: Fri, 18-Oct-85 08:23:50 EDT
Article-I.D.: watmum.296
Posted: Fri Oct 18 08:23:50 1985
Date-Received: Sat, 19-Oct-85 05:59:55 EDT
References: <964@vax2.fluke.UUCP> <133@nbires.UUCP>
Organization: U of Waterloo, Ontario
Lines: 11

>  ...  discussion of parsing dangling ELSE clauses
> In LR parsers, the solution is to indicate which
> action is to be taken in the event of a shift-reduce conflict.  In LL
> parsers, the solution is to indicate which alternative is assumed in the
> event of a director-set overlap.  Very little complexity is added to the
> Dick Dunn	{hao,ucbvax,allegra}!nbires!rcd		(303)444-5710 x3086
>    ...Simpler is better.

Using LR parsers, there is absolutely no need to screw around
with shift-reduce conflicts.  An LR grammar can easily be written
that parses Pascal if statements correctly.