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Re: syntax-after

From: Juri Linkov
Subject: Re: syntax-after
Date: Tue, 23 Nov 2004 08:27:55 +0200
User-agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.3.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:
>>>> I don't know if I will have net access this week--could you please
>>>> undo it?
>>> Done,
>> It seems you forgot to undo changes to etc/NEWS and syntax.texi...
> Oops, sorry.  I've fixed etc/NEWS and syntax.texi.
> Any other place?

You have reverted the changes in paren.el to old code:

    (dir (cond ((eq (car (syntax-after (1- (point)))) 5) -1)
               ((eq (car (syntax-after (point))) 4) 1)))

but this code is really bad, since it uses raw enum values 4 and 5
which are nowhere documented and too implementation specific.

You already proposed a new function `syntax-class'.  This would
improve the code.

I also think there should exist another function returning a complete
syntax string with all flags (e.g. `syntax-to-string').
Such C function could be created from `internal-describe-syntax-value'
(up to the line inserting "\twhich means:") with moving the rest of
the code in `internal-describe-syntax-value' (which just inserts
a readable syntax description) to Lisp side (e.g. to subr.el).

Juri Linkov

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