Nashorn JS Grammar

[A. Sundararajan]

There is no grammar file as such (like javacc, antlr grammar) for 
Nashorn grammar. But, there is a Java Nashorn Parser API in jdk 9 - JEP 
http://openjdk.java.net/jeps/236 The parsed ECMAScript code is 
represented via Tree API much like Javac's tree API.

Samples using nashorn parser API are :

http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/withcheck.js
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/evalcheck.js
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/prettyprinter.js
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/flexijson.js

Other option is using "nashorn:parser.js". This one is in jdk8u as well. 
This builtin script can be 'load'-ed and it exposes "parse" function. 
The object resulting from parse function looks like the one documented here:

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API

Samples using this script parse APIs

http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/parser.js
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/87123e713c92/samples/astviewer.js

-Sundar

On Tuesday 14 July 2015 06:48 PM, BURRIS Thomas wrote:
> I'm writing a DSL extension to Javascript and am trying to create Netbeans IDE support for it. To support syntax highlighting, etc, I need to parse the source scripts. Right now I'm doing it (as a PoC) using an old JavaCC grammar from 2006. This is insufficient since it's outdated, but also because it doesn't support the Nashorn extensions, which are crucial to my purpose. So ... my questions for the list are these:
>
> * Is there a grammar that I can use (i.e., is open source) that supports the Nashorn extensions?
> * If so, where can I get it? And what tool leverages it (i.e., Javacc, antlr, etc)?
>
> Any other links / suggestions / prior art are welcome...
>
> thanks!
>
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