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Re: Proposed extension of show-paren-mode: Highlight parens when point i

From: Stefan Monnier
Subject: Re: Proposed extension of show-paren-mode: Highlight parens when point is in L or R margin.
Date: Thu, 16 Oct 2014 20:14:57 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux)

>> Otherwise it seems way too weird/ad-hoc to hardcode it, so make
>> it dependent on a config var.
> I think that our marginal utility will drop off very sharply, the more
> complicated our configurability becomes.

The purpose is not really to make it configurable, but to isolate the
code that provides this part of the functionality.

> Since point is on the same line as the paren, and is in the WS at either
> BOL or EOL, and the (at most) two eligible parameters are on the edge of
> the "core", point can't be between the two candidates.  The nearest one
> is clear, surely.

Right, I was thinking about the case in my suggestion of highlighting
the closing paren in at the end of the previous line.

> Hmm.  The :prefix keyword for `defgroup' is not mentioned in the doc
> string for `defcustom' (which is where `defgroup' points you for details
> of keywords).

I think the :prefix only makes sense for defgroup, not for defcustom.
Many keywords are like that, so maybe defgroup shouldn't delegate to
defcustom's docstring.

> I've removed all the instances of :group.


> Done.  (More precisely, a function to do the check is called directly
> from s-p--categorize-p).

Yup, looks nice, thanks.


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