spidermonkey和narcissus语法分析

narcissus是js写的js解释器，但是底层还是依赖于spidermonkey，所以有了zaphod，zaphod可以方便的将firefox的spidermonkey切换到narcissus。

现在narcissus只能在firefox的beta1-beta8上运行，所以首先要下到firefox的beta浏览器。参照网址https://mozillalabs.com/zaphod/ 

-----------------------------------------zaphod for narcissus
For day to day browsing, Narcissus does not offer any real advantages over SpiderMonkey.  However, Narcissus is an ideal tool for developing new ideas for the JavaScript language itself.

Zaphod promises to be a great tool for getting hands-on experience with experimental JS language features. Initially, it will useful to us internally for rapidly piloting language features in the browser. Down the road, it may also become a vehicle for giving the community early access to these ideas, so they can try them out and give us feedback. And of course, it’s all open source, so anyone who wants to join in on the effort is most welcome.



spidermonkey是firefox的js解释引擎。有一个parse的api，可以解析js
-------------------------------------------spidermonkey parse api

一个独立的spidermonkey脚本，在js中操纵js源码更加方便，如语法高亮，静态分析，解释，编译等
https://developer.mozilla.org/en/SpiderMonkey/Parser_API

安装 在ubuntu下
先安装库
sudo apt-get install libnspr4-dev

源码安装手动----------------------这个最新的只有1.81，这个里面没有parse方法
下载源码
mkdir mozilla
cd mozilla
wget http://ftp.mozilla.org/pub/mozilla.org/js/js-1.7.0.tar.gz
tar xzf js-1.7.0.tar.gz
然后编译
cd js/src
make -f Makefile.ref
现在在Linux_ALL_...文件夹下有个js，这个就是了。
如何直接装到系统呢？http://ebixio.com/blog/2010/07/31/how-to-install-libjs-spidermonkey/

源码安装简单的安装--------推荐这种方式最新1.85
hg clone http://hg.mozilla.org/mozilla-central/
cd js/src
autoconf2.13
./configure
make

用法介绍
https://developer.mozilla.org/En/SpiderMonkey/Introduction_to_the_JavaScript_shell

js> Reflect.parse("
function a(){
  var b=2;
  function c(){
    var ci=3;
	ci+=b
	}
}
	",{loc:false})

结果

({
 
type:"Program", 
body:[
 {
  type:"FunctionDeclaration",
  id:{ type:"Identifier", name:"a"}, 
  params:[], 
  body:{ 
   type:"BlockStatement",
   body:[{
	 type:"VariableDeclaration", 
	 kind:"var", 
	 declarations:
	 [{
	  type:"VariableDeclarator",
	  id:{ type:"Identifier", name:"b"},
	  init:{ type:"Literal", value:2}
	  }]
	 },
       {
	 type:"FunctionDeclaration",
	 id:{ type:"Identifier", name:"c"},
	 params:[], 
	 body:{
	   type:"BlockStatement",
	   body:[{
		 type:"VariableDeclaration", 
		 kind:"var", 
		 declarations:[{
		   type:"VariableDeclarator",
		   id:{ type:"Identifier", name:"ci"}, 
		   init:{ type:"Literal", value:3}}]}, 
	    { 
	  type:"ExpressionStatement", 
	  expression:{ 
	   type:"AssignmentExpression", 
	   operator:"+=", 
	   left:{  type:"Identifier", name:"ci"}, 
	   right:{ type:"Identifier",  name:"b"}
	             }
	   }
	   ]}, 
      generator:false, 
      expression:false
	    }
	  ]},
  generator:false, 
  expression:false
}]

})