Re: [Pyobjc-dev] ObjC exceptions, Python exceptions, the event loop

[Just v. R. <ju...@le...>]

Ronald Oussoren wrote:

> 
> On Saturday, Jan 18, 2003, at 13:06 Europe/Amsterdam, Just van Rossum
> wrote:
> 
> > I'm wondering about ObjC exceptions: if an app throws an exception,
> > could it be caught by the code that invokes the event loop? Hm,
> > considering the call stack, I would think so. If this is indeed so,
> > I would suggest to catch all exceptions in the
> > AppKit.NSApplicationMain wrapper and convert it to a Python
> > exception. Since the main program is a Python program, it makes
> > sense for it to end as a real Python program instead of "crashing".
> 
> Your right. Somehow I forgot to add a try-block around the call to
> NSApplicationMain. The core module already does this for methodcalls.
> 
> > Additionally, if the exception is OC_PythonException, the
> > _original_ Python exception should be reraised, resulting in a
> > decent traceback.
> The support-code for exceptions in objc_util.m should do that, but
> I'm not entirely sure if we raise the same exception or a copy of it.

I've had a look, and adding the proper handlers to the NSApplicationMain
wrapper is straightforward. However, I'm not getting what I expected:
the traceback only shows the part in the main program. I'll investigate
and patch what I can.

Just