Downloading source

Graydon Hoare graydon at
Thu Apr 16 13:06:53 PDT 2009

On 16/04/09 12:59 PM, Rich Emberson wrote:

> My real issue is more meta. I've got a javascript
> constraint engine which seems to work with SpiderMonkey
> 1.8. What I'd like to do is create a version of the
> constraint engine code that uses some of the new
> javascript features such as "class". Thats why I was
> interested in getting the es4 source so I could
> compile it on my 64 box and test my port.
> Are there any javascript implementations out there,
> even if they are pre-release, that I could get
> that have the new features?

Unfortunately this is really not the program you want. The RI you're 
trying to download was an experimental interpreter for spec purposes, 
following a language design that is no longer on the table; it would not 
have performed adequately, even if it was implementing a language likely 
to be approved.

As it stands, the language it interprets is *not* the language approved 
as ES5 (not even close) and it's not clear that the committee is likely 
to follow along much of the work that was done on that RI.

In other words, it's more of a historical artifact at this point than a 
representative of current committee effort or consensus. It's not worth 
using in the way you describe.



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