The code for Babylscript is based on Mozilla's Rhino JavaScript interpreter, version 1.7R2. Since the Babylscript implementation is merely a modification of Rhino's source code, the Babylscript code has the same license terms (a mix of MPL1.1 and GPL2).

This package contains the raw source files. You can suck them into an IDE to use the code. Any build scripts in the package were left-over from the original Rhino source code, and may not properly build all the source files.

Only the interpreter portion of the Rhino JavaScript engine was modified. The optimizer/bytecode-compiler does not work properly after the Babylscript changes. As a result, to use Babylscript, you must run with optimizations disabled:

  Context cx = Context.enter();
  cx.setOptimizationLevel(-1);  // disable optimizations
  try {
     Scriptable scope = cx.initStandardObjects();
     cx.evaluateString(scope, code /* Your code here */, null, 0, null)
  } finally {
     Context.exit();
  }

Some of the more non-ECMAScript portions of the engine were also left unchanged (e.g. destructuring assignments, let, E4X, etc.), so this functionality may not work properly with Babylscript features or may not work at all.

A small runner program is included in this source package. Compile it using the Ant build.xml script in the root directory:

ant babylscriptrun

It will create a babylscriptrun.jar file which you can use to run a file filled with UTF-8 encoded Babylscript code. A sample HelloWorld Babylscript program is provided called "sample.js". Run this program using

java -jar build/babylscriptrun.jar babylrunner/sample.js

Using Babylscript as a scripting language for Java programs can be a bit limiting, so this source package also includes an experimental Babylscript to JavaScript compiler. You can take Babylscript code, translate it into regular JavaScript, and then run the result in a normal web browser.

First you need to compile the Babylscript to JavaScript translator using the Ant build.xml script in the root directory:

ant babyl2js

It will create a babyl2js.jar file which you can use to translate files containing UTF-8 encoded Babylscript code. A sample HelloWorld Babylscript program is provided called "sample.babyl2js.js". Translate this program into JavaScript using

java -jar build/babyl2js.jar -html babylrunner/sample.babyl2js.js output.html

Then open the output.html file in a web browser to run the result. Rhino: JavaScript in Java Rhino is an implementation of JavaScript in Java. Documentation can be found

http://www.mozilla.org/rhino/index.html

- Version: MPL 1.1/GPL 2.0
-
- The contents of this file are subject to the Mozilla Public License Version
- 1.1 (the "License"); you may not use this file except in compliance with
- the License. You may obtain a copy of the License at
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- The Original Code is Rhino code, released
- May 6, 1999.
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-   Norris Boyd
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