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From: Yusuke Suzuki <utatane....@gmail.com>
Date: Sat, 1 Sep 2012 01:42:20 +0900
Message-ID: <CANewFPSyF+aHUn9ki_XzgsmyZbtBOj8gBhvhk1NfQBiJWqg...@mail.gmail.com>
Subject: Esmangle: mangling tool for Mozilla Parser AST
To: esprima@googlegroups.com
Content-Type: multipart/alternative; boundary=f46d0446317895013f04c8927b8f

--f46d0446317895013f04c8927b8f
Content-Type: text/plain; charset=ISO-8859-1

Hello all,

Last night, I decided to implement some AST modifying pass, and created
esmangle : mangling tool for Mozilla Parser AST.
http://constellation.github.com/esmangle/

This is created yesterday and test cases are very few, so it is still
experimental. :)

We can use it like this,

var first = esprima.parse(code);
var tree =esmangle.mangle(first);
var res = escodegen.generate(first, { format: { compact: true, semicolons:
false, renumber: true, hexadecimal: true, escapeless: true } });

You can try this on the demo page.

To get more compression ratio, we should create AST modifying pass like

+ remove wasted block. (`if (cond) { stmt; }` => `if (cond) stmt;)
+ reordering declarations
+ concat multiple var declarations into one

Thanks.

--f46d0446317895013f04c8927b8f
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Hello all,<div><br></div><div>Last night, I decided to implement some AST m=
odifying pass, and created esmangle : mangling tool for Mozilla Parser AST.=
</div><div><a href=3D"http://constellation.github.com/esmangle/">http://con=
stellation.github.com/esmangle/</a></div>


<div><br></div><div>This is created yesterday and test cases are very few, =
so it is still experimental. :)</div><div><br></div><div>We can use it like=
 this,</div><div><br></div><div>var first =3D esprima.parse(code);</div>


<div>var tree =3Desmangle.mangle(first);</div><div>var res =3D escodegen.ge=
nerate(first, { format: { compact: true, semicolons: false, renumber: true,=
 hexadecimal: true, escapeless: true } });</div><div><br></div><div>You can=
 try this on the demo page.</div>

<div><br></div><div>
To get more compression ratio, we should create AST modifying pass like</di=
v><div><br></div><div>+ remove wasted block. (`if (cond) { stmt; }` =3D&gt;=
 `if (cond) stmt;)</div><div>+ reordering declarations</div>
<div>+ concat multiple var declarations into one</div><div><br></div><div>T=
hanks.</div>

--f46d0446317895013f04c8927b8f--