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Re: Reductions during Bison error handling

From: Hans Aberg
Subject: Re: Reductions during Bison error handling
Date: Tue, 14 May 2002 01:31:56 +0200

At 14:25 -0700 2002/05/13, Paul Hilfinger wrote:
>HA > 1. Default reduction.
>HA >   a. The reduction marked $default in the .output file.
>And 1a should NOT be documented, since it is purely a matter of
>implementation and ought to be open to change.


>BTW, I think I should comment on this LALR/LR thing.  I don't believe
>this issue has anything to do with the distinction between LR and LALR
>parsers.  Both use identical parsing algorithms and identically
>formatted tables.

Not true, as LALR(1) may apply reductions before an error is detected,
which LR will not do (see Aho et al., sec 4.7, p 240).

  Hans Aberg

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