https://github.com/leto/jaspers

Javascript on Parrot Virtual Machine
https://github.com/leto/jaspers

Last synced: about 2 months ago
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Javascript on Parrot Virtual Machine

• Host: GitHub
• URL: https://github.com/leto/jaspers
• Owner: leto
• License: artistic-2.0
• Created: 2009-07-24T04:27:32.000Z (over 15 years ago)
• Default Branch: master
• Last Pushed: 2011-04-05T06:52:46.000Z (almost 14 years ago)
• Last Synced: 2024-06-11T18:57:32.003Z (7 months ago)
• Language: JavaScript
• Homepage:
• Size: 729 KB
• Stars: 6
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
Jaspers - Javascript on Parrot Virtual Machine

==============================================

Jaspers is an implementation of Javascript on the Parrot Virtual Machine. Exactly

which flavor of JS to use has not been decided yet.

Currently Jaspers uses NodeJS to execute our Javascript parser. We are still in

the bootstrapping stage.

Features

--------

Parses javascript with a PEG.js-generated parser. This is a JSON datastructure.

Jaspers is currently known to work with Nodejs 0.2.5 and 0.4.4.

Trying Jaspers

--------------

Jaspers has a very limited feature set right now, but if you want to kick the tires,

you can run

    node jaspers.js

Vision

------------

Current plans are to generate a stage 0 compiler with [PEG.js][pegjs_homepage],

similar to what is described in [whiteknight++'s blog post][whiteknight]. This stage 0

compiler will use PEG.js to parse Javascript and emit PIR. Node.js is currently

being used to bootstrap the stage 0 compiler. Once a stage-0 compiler exists,

NodeJS will not be necessary.

Parrot will then turn stage 0 into bytecode and a fakecutable, and then the

stage 0 compiler will be used compile the source code to itself, thus

generating a bootstrapped stage 1 compiler, full of unicorns dipped in fairy dust.

It has not yet been decided what the stage-0 compiler should target. Currently the

choices are PIR/PAST/POST/PBC.

Sputnik, a Javascript conformance test suite, looks like it could be very useful:

http://sputnik.googlelabs.com/

Fellow Travelers

---------------

This blog post about implementing a lisp with PEG.js and node [using_pegjs] is a good

example of using PEG.js, and this presentation by Bryan Ford is a good

theoretical introduction to Parsing Expression Grammars [peg_theory].

[pegjs_homepage]: http://pegjs.majda.cz

[whiteknight]: http://whiteknight.github.com/2010/12/07/javascript_on_parrot_plan.html

[using_pegjs]: http://www.sergimansilla.com/blog/writing-a-javascript-interpreter-for-dbn-using-canvas-I/

[peg_theory]: http://brynosaurus.com/pub/lang/peg-slides/index.html