Re: LR(1) Parsing : Error Handling & Recovery

On 2014/07/21 14:20, Evangelos Drikos wrote:
> On 7/20/14, 2:38 AM, Hans Aberg wrote:
>>> A GLR parser splits the parses in face of an ambiguity, which might be
>>> used instead. Bison supports this, but currently the actions during a
>>> parse split are not executed, and so cannot set context variables for
>>> the lexer, until the merge.
>
> In short, your idea can be applied only as a hack; it might work
> sometimes, depends on the grammar. If that is what you meant we don't
> disagree.
> [In my experience, it's a rare parser that is useful and doesn't depend
> on some hacks. -John]


Indeed, but yet another feature that one might want is being able to
split the lexer as well - may be useful for experimenting with the
processing of natural languages. Such a feature has been discussed a bit
on the Bison mailing lists.

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