The “Break it Down” Blog

It looks like the Dojo developers have released a JavaCC Grammar for EcmaScript, more specifically ECMA-262 Standard 3rd edition.

Junior developer does a fairly good writeup about it as he’s in the middle of writing a new JavaCC book (not a feat for the weak hearted).

For the folks wondering what this is, JavaCC is a compiler generator. What the Dojo folks have released is a grammar that can be run through JavaCC to generate source code that is capable of parsing and building out an abstract syntax tree (AST) of your JavaScript code. This is helpful for folks writing any sort of tools that would process JavaScript. If you are just a JavaScript developer doing nice AJAX effects, you likely don’t need to worry about this.