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From: Perry Smith <pedz@easesoftware.com>
Cc: help-gnu-emacs@gnu.org
Subject: Re: State-machine based syntax highlighting
Date: Thu, 7 Dec 2006 14:24:25 -0600	[thread overview]
Message-ID: <2FCD3A38-5454-4F04-B4F3-E3E3AFC65F81@easesoftware.com> (raw)
In-Reply-To: <1165517838.526624.171950@f1g2000cwa.googlegroups.com>


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On Dec 7, 2006, at 12:57 PM, Robert Thorpe wrote:

> spamfilteraccount@gmail.com wrote:
>> Stefan Monnier wrote:
>>>
>>> Actually, font-locking *is* implemented in C.  The elisp part  
>>> usually takes
>>> a negligible amount of time.  The problem start appearing when the
>>> functionality of the C code is not sufficient and you start  
>>> trying to parse
>>> the code in elisp, which is slow.
>>
>> Good to know. I thought font-lock was implemented in elisp and didn't
>> bother to check.
>
> Precisely speaking...
> The code that determines what rules are used to font-lock text is in
> Elisp.
> The regexp engine that finds the things to be font-locked is in the
> core of Emacs.
> The colourisation is implemented in the Emacs core.

Instead of a state machine, how about a lalr parser?  It would be a fun
project to take the lalr table generation logic from bison, smash it
into emacs, along with some predefined actions and hooks back
into emacs.  The grammers could be loaded when needed.

Perry Smith ( pedz@easesoftware.com )
Ease Software, Inc. ( http://www.easesoftware.com )

Low cost SATA Disk Systems for IBMs p5, pSeries, and RS/6000 AIX systems



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  reply	other threads:[~2006-12-07 20:24 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-07  6:14 State-machine based syntax highlighting spamfilteraccount
2006-12-07 10:53 ` Robert Thorpe
2006-12-07 11:56   ` spamfilteraccount
2006-12-07 12:42     ` Robert Thorpe
2006-12-07 14:27       ` spamfilteraccount
2006-12-07 14:39         ` Robert Thorpe
2006-12-07 17:02           ` spamfilteraccount
2006-12-07 17:42             ` Stefan Monnier
     [not found]             ` <mailman.1644.1165513359.2155.help-gnu-emacs@gnu.org>
2006-12-07 18:35               ` spamfilteraccount
2006-12-07 18:57                 ` Robert Thorpe
2006-12-07 20:24                   ` Perry Smith [this message]
2006-12-08  7:33                   ` spamfilteraccount
2006-12-08  8:10                     ` Tim X
2006-12-08  8:36                       ` spamfilteraccount
2006-12-08 16:17                         ` Robert Thorpe
2006-12-08 21:14                           ` spamfilteraccount
2006-12-09  2:08                             ` Stefan Monnier
2006-12-09  2:06                           ` Stefan Monnier
2006-12-09  3:24                             ` Lennart Borgman
2006-12-08 13:14                       ` Leo
2006-12-08 14:00                       ` Robert Thorpe
2006-12-09  2:10                         ` Stefan Monnier
     [not found]                       ` <mailman.1672.1165586758.2155.help-gnu-emacs@gnu.org>
2006-12-08 14:17                         ` Robert Thorpe
2006-12-08 21:17                       ` spamfilteraccount
     [not found]                   ` <mailman.1653.1165523111.2155.help-gnu-emacs@gnu.org>
2006-12-08 10:01                     ` Robert Thorpe
2006-12-07 19:02                 ` Stefan Monnier
2006-12-07 19:29                   ` spamfilteraccount
2006-12-08 14:43                     ` Robert Thorpe

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