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bug#24870: 26.0.50; parse-partial-sexp ignores comment-end


From: npostavs
Subject: bug#24870: 26.0.50; parse-partial-sexp ignores comment-end
Date: Sun, 18 Dec 2016 00:39:11 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)

Alan Mackenzie <address@hidden> writes:

> Hello, Noam.
>
> On Thu, Dec 15, 2016 at 11:33:36AM -0500, Noam Postavsky wrote:
>> On Wed, Dec 14, 2016 at 4:58 PM, Alan Mackenzie <address@hidden> wrote:
>
>> > What is new here is characters with paren syntax also being components of
>> > 2-char comment delimiters.  I recently fixed a similar problem when
>> > characters with word syntax were also flagged as 2-char comment delimiter
>> > parts.  I think a similar patch at case label Sopen: (Line ~3322), which
>> > would peek ahead at the next character to check for "{-" before
>> > recognising the "{" as an open paren would be the best fix.
>
>> I don't think special casing Sopen makes sense, shouldn't the check
>> apply to all syntax classes?
>
> Maybe.  I'm too tired to work this out at the moment (it was the office
> Glühwein day).
>
>> (the special case for word syntax does make sense, because it has its
>> own inner loop already)
>
> As does comment syntax, of course.
>
>> > Do you want to make this fix, or should I do it?  If you want to do it,
>> > I'm willing (indeed, eager) to review it for you.
>
>> I'll have a patch ready in a day or two.
>
> Excellent!  Or even in three or four days.  Take your time, do it well
> (at least, better than I managed last time round) and enjoy doing it.

Okay, here it is.  I think I've made this function a bit less twisty,
and hopefully haven't broken anything new (make check is still passing).

Attachment: v1-0001-Fix-comment-detection-on-open-parens.patch
Description: patch


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