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Re: [Emacs-diffs] /srv/bzr/emacs/trunk r105429: New function `string-mar

From: Chong Yidong
Subject: Re: [Emacs-diffs] /srv/bzr/emacs/trunk r105429: New function `string-mark-left-to-right' for handling LRMs.
Date: Wed, 17 Aug 2011 17:12:16 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Kenichi Handa <address@hidden> writes:

> One more tip: It may be a little bit faster to use a bidi-specific
> category table with with-category-table because, in most cases, we can
> find a category set for a specific character faster.  In a
> bidi-specific category table, most characters (e.g. all han
> characters) will have the same category set and thus the set is
> recorded for a group of characters.

Currently, we are using this only for string-mark-left-to-right, and
performance does not seem to be a problem for that usage.

Also, we only need the "strong R" category.  We could add the "strong L"
category for symmetry, but I don't see the need to add the other bidi
categories until they are called for.

So, I propose adding

 ?L - Strong-L bidi types (L, LRE, LRO)
 ?R - Strong-R bidi types (R, AL, RLE, RLO)

to the standard category table.

Sound fine?

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