[antlr-interest] JScript (ECMA 4) grammar?

[rkevinburton at charter.net]

I was wondering if there has been an implementation of what Microsoft terms as ECMAscript 4. Basically it is Microsift's proposed additions to the current ECMA script spec. I am most interested in a Jscript grammar that handles the object structures such as 'class'.

http://msdn.microsoft.com/en-us/library/49zhkzs5.aspx

Thank you.

Kevin