JavaScript parser in JavaScript

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+7 Q:

JavaScript parser in JavaScript

I need to add some lightweight syntactic sugar to JavaScript source code, and process it using a JavaScript-based build system. Are there any open source JavaScript parsers written in JavaScript? And are they reasonably fast when run on top of V8 or a similar high-performance JavaScript implementation?

Thank you for any pointers you can provide!

+1 A:

It's not a JavaScript parser itself, but there's a project called Jison (like Bison) for generating parsers that's written in JS.

alunny 2010-03-31 16:43:17

+1 A:

The only metacircular interpreter that I have seen implemented in JavaScript is the Narcissus Engine.

It was developed also by Brendan Eich, they used a lot of non-standard extensions that are specific to SpiderMonkey, I think it will not work on V8.

CMS 2010-03-31 16:51:40

Interesting! I suppose there's a parser hiding in there somewhere. :-) Unfortunately, I'm looking for something that runs under V8. But thanks for the very interesting link!

emk 2010-03-31 21:17:01

What about just using eval() ?

xavierm02 2010-03-31 18:30:42

eval doesn't parse code, it runs it.

emk 2010-03-31 21:14:39

Right..........

xavierm02 2010-04-02 05:02:29

+2 A:

Crescent Fresh answered this question in the comments:

JSLint contains a JavaScript parser written in JavaScript. See jslint.com/fulljslint.js Around line 2049 begins the parser. JSLint is written to also handle html so you'd have to gloss over those parts

emk 2010-04-13 13:59:20

Crescent Fresh, if you'd like to repost your comment as an answer, I'll accept it and upvote you.

emk 2010-04-13 14:00:04

ansaurus

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JavaScript parser in JavaScript

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