Subj : Re: SpiderMonkey: JavaScript exceptions and native code
To   : netscape.public.mozilla.jseng
From : Braden McDaniel <braden@endoframe.com>
Date : Mon Aug 11 2003 02:24 am

On Sun, 10 Aug 2003 22:11:32 -0700, Brendan Eich wrote:

> Braden McDaniel wrote:
> 
>>Can failure in any of the JS_* API functions result in a JavaScript
>>exception being thrown? What, in general, is the proper way to deal with
>>that in native code? Just return JS_TRUE ASAP?
>>
> 
> No, return JS_FALSE.  A false return (or null, if the return value is of 
> pointer type and null is available without overloading that return 
> value) means error or exception.  You can check whether an exception is 
> pending on a given context with JS_IsExceptionPending.
> 
> The JS_Compile*, JS_Evaluate*, JS_ExecuteScript, and JS_CallFunction* 
> APIs will report uncaught exceptions if returning false or null to a 
> caller using a context with no stack frames active.

So returning JS_FALSE from a native method implementation only terminates
the script if no exception is pending?

-- 
Braden McDaniel                           e-mail: <braden@endoframe.com>
<http://endoframe.com>                    Jabber: <braden@jabber.org>

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