What is JSON.parse written in / Is it open source?
<p>PHP funcitons are written in C and you can look at the source code if you like.  For example here - 
<a href="http://lxr.php.net/opengrok/xref/PHP_5_3/ext/session/session.c#1361" rel="nofollow">session_start source</a></p>

<p>What about with Javascript?  How are functions like JSON.parse implemented?  Where can I go to view the source?</p>

<p>Thanks!</p>
