JSASL

JSASL (see example here) is the result of my ongoing efforts to compile the saslcompiler's Java code to a JavaScript library. The code is generated using GWT's JavaScript compiler and the Closure compiler. The classes are exported to a native JS environment by the GWTExporter.

Build

• Download and install the latest version of GWT.
• Copy build.properties.example to build.proporties and adjust to path to the GWT SDK
• Build saslcompiler.min.js by

$ ant build

Usage

There is a usage example included in /example. This example is also available here: http://patrickbrosi.de/jsasl/. A language guide can be found here. To use the compiler in your project, just include saslcompiler.min.js into your project. You can use the compiler and the reduction machine like this:

var sasler;
var printer;

saslInit = function() {
  sasler = new sasl.Sasl();
  printer = new sasl.Printer();

  var res = sasler.compileAndReduce('def a x = x*x . a 2');
  // now print the result
  var res;
  printer.print(res, 10,
    function(val) {
      res += val
    }
  };
);

Important: you have to define saslInit(), as it is called as soon as the SASL classes are available.

Known issues

• On-the-fly reduction machine error messages are cryptic, to say the least
• The reduction machine makes heavy use of recursion and is not executed asynchronously. Lists, however, are evaluted asynchronously and should not freeze the browser.
• Firefox seems to have problems with recursion-heavy calculations