Subj : Re: How do I raise an exception?
To   : Thomas Sondergaard
From : Brendan Eich
Date : Wed Aug 03 2005 10:39 am

Thomas Sondergaard wrote:
> Brendan Eich wrote:
> 
>> If you want to make an instance of Error and throw it, you'll have to 
>> get the value of the "Error" property of a properly initialized or 
>> otherwise (lazy standard class resolution) configured global object, 
>> and save it with a rooted pointer or jsval.
>>
>> Then you can call this Error constructor function object reference 
>> with the JS_CallFunctionValue API, to create the exception object you 
>> wish to throw, passing appropriate arguments.  If that all works, set 
>> the new exception object reference as the pending exception and return 
>> false.
>>
>> /be
> 
> 
> Does this look reasonable?

It's not what I suggested, and it's quite a bit more costly (running the 
compiler to make a function that's called and then GC'd, all to create 
and throw an Error instance).

What I suggested should be a few lines of JS API calling, if you ignore 
error checks.

/be

.