Subj : Re: SpiderMonkey: JavaScript exceptions and native code
To   : netscape.public.mozilla.jseng
From : Brendan Eich <brendan@meer.net>
Date : Sun Aug 10 2003 11:29 pm

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.


This remark applies to almost all APIs taking cx as the first 
parameter.  See the JS_InstanceOf followup for a conditional (depending 
on whether the argv parameter is null) exception to the rule.

/be

.