[webkit-help] JSC: JSValueCreateJSONString

Brent Fulgham bfulgham at gmail.com
Thu Jun 10 14:42:24 PDT 2010


I just realized what your problem was during a WWDC session.

Double check your compiler settings. If you are building to target  
Leopard (maybe Tiger?) Mac OS will null out features that don't exist  
in those older OS versions.

Maybe someone from Apple can tell us when Safari 4 support kicks in  
based on build OS target.


Sent from my iPhone

On Jun 10, 2010, at 8:38 AM, Brent Fulgham <bfulgham at gmail.com> wrote:

> Hi Brian,
> On Jun 5, 2010, at 4:37 PM, Brian Barnes wrote:
>> I would like to save the state of several scripts.  My system is  
>> event driven so there is never any script in an executing state  
>> when I save/load.  This means all I need to save is the global  
>> object.  Looking through the headers I found:
>> JSValueCreateJSONString/JSValueMakeFromJSONString
>> This, of course, is perfect for me, but it doesn't seem to be  
>> implemented in my build (which is pretty recent.)  This might be a  
>> mis-understanding on my part about how to get these features in, or  
>> it's just not implemented yet (the actually function address is  
>> NULL.)
>> Is this me not understanding the code or is this a feature I'll  
>> have to wait for?  I should point out that I'm just grabbing the  
>> nightly build and pulling out the framework.  Is there another way  
>> to serialize/de-serialize an object in a script?
> Are you sure you are linking against your recent build?   
> JavaScriptCore is a core component of Mac OS, so you might be  
> inadvertently linking against the system version.  I've made this  
> mistake before, and even trashed my OS by clobbering the system  
> JavaScriptCore with my build in an effort to force things to link  
> properly!  :-)
> I'm not sure which OS you are running on (or which version of Safari  
> is installed).  The header indicates this feature should be present  
> as of Safari 4.0, so it seems likely that even the system WebKit  
> would have it, but it's worth double-checking.
> Aside from that, I would expect the feature to be present.  I'll see  
> if I can try this out myself and suggest anything else.
> -Brent
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