sweet.js

Hygienic Macros for JavaScript!

Documentation at sweetjs.org.

Overview and motivation in this talk.

Early stage at the moment. Lots of bugs so be warned!

Use

Clone sweet.js and then install its dependencies:

$ npm install underscore optimist escodegen

To try it out make a file test_macros.js:

// functions can now be spelled def!
macro def {
  case $name:ident $params $body => {
    function $name $params $body
  }
}
def add (a, b) {
  return a + b;
}

console.log( add(3, 7) );

And compile it with sjs:

$ bin/sjs -o output.js test_macros.js
$ node output.js
10

Hacking

Install dev dependencies:

$ npm install expect.js
$ npm install -g shelljs mocha

And build with shelljs:

$ shjs build