BiwaScheme

BiwaScheme is a Scheme interpreter written in JavaScript.

Works with web browsers (including mobile devices) and Node.js.

Demos

see http://www.biwascheme.org/

Download

http://www.biwascheme.org/

(Or you can just copy the file from ./release.)

How to use

Just load biwascheme.js (or biwascheme-min.js) and write Scheme code.

<!DOCTYPE html>
<html>
<body>

<div id="bs-console"></div>

<script src="biwascheme.js"></script>
<script type="text/biwascheme">
(display "hello, world!")
</script>

</body>
</html>

How to use with node.js to run a biwa script

$ npm install biwascheme
create a file a.scm:

(display "Hello, world!") (newline)
$ biwas a.scm

How to use from inside node.js as a module

$ npm install biwascheme
create a file a.js:

var BiwaScheme = require("biwascheme"); BiwaScheme.run("(+ 1 2)"); // or BiwaScheme.run_file("a.scm");
$ node a.js

Conformance

BiwaScheme implements most of the features of R7RS small, including first-class continuation and tail call optimization.

Major lacking features are:

syntax-rules
Exceptions
Library system

There are two limitations that arise from JavaScript. These will not be fixed (it's technically possible to fix but will be very unefficient.)

Strings are immutable
Integers are not distinguished from float

Building biwascheme.js

See doc/dev/build.md

License

MIT-LICENSE

BiwaScheme logo by @jcubic: Creative Commons Attribution 3.0

Acknowledgements

Kent Dyvbig, Three implementation models for scheme
- http://www.cs.indiana.edu/~dyb/pubs/3imp.pdf
jsScheme
- http://alex.ability.ru/scheme.html (inavailable)
ExplorerCanvas (demo/excanvas.js)
- http://excanvas.sourceforge.net/

Contact

https://github.com/biwascheme/biwascheme

Yutaka HARA (yhara) yutaka.hara.gmail.com http://twitter.com/yhara_en

hide5stm/biwascheme