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Re: NYACC: getting source location info?

From: Matt Wette
Subject: Re: NYACC: getting source location info?
Date: Fri, 10 Jul 2020 20:00:15 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 7/10/20 1:37 PM, wrote:

I'm having some fun with NYACC (thanks, Matt!).

To help debugging things and for errors and warnings, it'd be nice
to "know" where the current LHS non-terminal starts in the source.

Its endpoint is (is it?) (port-line (current-input-port) [and, of
course, (port-column ...)] -- at least some playing around suggest
that (and it makes sense, somehow).

Is there anything I've overlooked? Or do I have to hack the (or
roll-my-own) lexer for that?

Thanks for any insight

-- t

I assume you mean providing source location information to the
values (i.e, $1, etc).  I've thought about that a few times but have
not arrived at anything intelligent.  Maybe using object properties
(see sec 6.11 in Guile Ref) in the lexical analyzer, as you mention.

Take care,

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