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RE: Push / pull model

• To: "John Cowan" <jcowan@r...>,"Lars Marius Garshol" <larsga@g...>
• Subject: RE: Push / pull model
• From: "Keith W. Boone" <keith@w...>
• Date: Thu, 19 Sep 2002 11:54:53 -0400
• Cc: <xml-dev@l...>
• Importance: Normal
• In-reply-to: <200209191501.LAA27747@m...>
• Reply-to: <keith@w...>

We may not use lexers that generate events, but we do use parsing tools that
work that way.  The events are reductions, and the actions of the event
either build a parse tree, or interpret the code.  In fact, these tools
provide for a very natural way to specify the events [as a grammar], and
produce very readable parsers.

	Keith

-----Original Message-----
From: John Cowan [mailto:jcowan@r...]
Sent: Thursday, September 19, 2002 10:50 AM
To: Lars Marius Garshol
Cc: xml-dev@l...
Subject: Re:  Push / pull model


Lars Marius Garshol scripsit:

> Granted, the event model does require you to turn your head around
> compared to ordinary programming, but that's easily done, and once
> done event-based programming is very easy.

Again, I would like to see anyone write a recursive descent compiler (or
similar analyzer) using a lexer level that pushes events.  The natural
and readable becomes a vast wasteland of parser tables and gibberish.

--
John Cowan
        jcowan@r...
                I am a member of a civilization. --David Brin

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