[Laszlo-dev] LPP-6098: JS2

[P T Withington]

[cc-ing Don, Laszlo-dev:  feel free to pitch in here!]

On 2008-06-05, at 06:12 EDT, Lou Iorio wrote:

> http://www.openlaszlo.org/jira/browse/LPP-6098
>
> From JIRA:
>
> "JS2 is not explicitly mentioned anywhere as far as I can tell, but  
> each method declaration uses JavaScript 2-style type declarations.  
> JS2 and typing would likely need to be added to the "Language  
> Preliminaries" section of the dev guide. It currently contains  
> obsolete information in the JavaScript section and should be updated  
> to mention that JavaScript in LZX supports a set of JS2 features."
>
> Currently, we say this in the Language Preliminarys chapter of the  
> dguide:
>
> LZX incorporates a partial implementation of the ECMA-262 Edition 3  
> specification.
>
> We also provide a history of JavaScript and ECMAScript that seems  
> like too much detail to me.

URL?  I don't know my way around the doc like you.

> The chapter ECMAScript in the dguide provides a lot more, including  
> the differences between LZX
> and ECMAScript.
>
> Has this changed? What should we really say?

Give me an URL and I'll tell you.  I think I updated this page  
recently, as it used to basically be a list of the ES things that we  
could not support on swf5.  What LPP-6098 is complainint about is that  
we have added a small subset of the things being proposed for JS2/ 
ES4.  Unfortunately, this is not a standard yet, so we can't just  
reference it (drafts exist: http://www.ecmascript.org/es4/spec/overview.pdf) 
   In particular, the things we have added include:

1) Class declarations

2) Type annotations

3) Additional operators: `is` and `cast`

4) Optional and rest parameters for functions

[There may be others, but that's what came off the top of my head.]