From: Francois Pottier <Francois.Pottier@inria.fr>
To: Joel Reymont <joelr1@gmail.com>
Cc: Caml List <caml-list@inria.fr>
Subject: Re: Error location reporting in Menhir
Date: Fri, 30 Mar 2007 21:36:35 +0200 [thread overview]
Message-ID: <20070330193635.GA598@yquem.inria.fr> (raw)
In-Reply-To: <7DE6C068-8889-4A8E-9C98-66471DDD9878@gmail.com>
Hello,
On Fri, Mar 30, 2007 at 03:02:06PM +0100, Joel Reymont wrote:
> I currently retrieve location like this during parser errors:
>
> let rhs_loc n = (Parsing.rhs_start_pos n, Parsing.rhs_end_pos n)
>
> I then report it like this:
>
> let syntax_error s num =
> parser_error s (rhs_loc num)
>
> In my grammar I report errors like this:
>
> | INPUT COLON input_decs error { syntax_error "Missing semicolon" 4 }
>
> How do I rewrite my error reporting for Menhir?
Probably something like this:
| INPUT COLON input_decs error
{ parser_error "Missing semicolon" ($startpos($4), $endpos($4)) }
$startpos and $endpos are keywords and can be used only within a semantic
action, so you can no longer define auxiliary functions such as your rhs_loc.
Hope this helps,
--
François Pottier
Francois.Pottier@inria.fr
http://cristal.inria.fr/~fpottier/
prev parent reply other threads:[~2007-03-30 19:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-30 14:02 Joel Reymont
2007-03-30 19:36 ` Francois Pottier [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070330193635.GA598@yquem.inria.fr \
--to=francois.pottier@inria.fr \
--cc=caml-list@inria.fr \
--cc=joelr1@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).