Theres one thing I dont really understand about try/catch type constructs,
the whole point of them !!!
I can see why there used, to have one generic error handler it the end of a
function to catch all errors, and therefore allow defensive code to be
written in a non-obtrusive manor. However, I think its much simpler to have
a label at the end of the function, and use (gasp) a "goto" statement. Shock
Horror, but isnt this all try and catch effectively does ???
Admittably I dont do this very often, for fear of my collegues looking at my
code, and the abuse which I would recieve. But in things such as a
Open_CommPort type function, where you need to check the return values of
about 8 functions, and handle any errors, "goto error_label" is spot on.
(Ive actually seen a goto somewhere in Palms source code). On a further
note, your compiled code, inevitably ends up as a bunch of "goto" statements
anyway (what else do you think a "JMP" instruction is ???).
goto end:
end:
Cheers Rik.
> -----Original Message-----
> From: Keith Rollin [SMTP:[EMAIL PROTECTED]]
> Sent: 19 April 2001 21:33
> To: Palm Developer Forum
> Subject: Re: Try/Catch blocks don't work under POSE?
>
> >I should have known better especially after writing so much hardware
> >exception handling in VC++. At the risk of asking another stupid
> >question.....Can you suggest a procedure or method of handling/trapping
> >these type of exceptions from the application?
>
> Oh, you're going to hate this:
>
> int x=5,y=0;
>
> if (y != 0)
> {
> x /= y; // force divide by zero
> }
> else
> {
> MyErrDisplay ("Can't divide by zero!");
> }
>
> Or you can just let Poser display the error messages. But short of
> installing a DivideByZero hardware exception handler (something not
> supported by the OS), there's no way to install an
> application-defined handler.
> --
>
> -- Keith Rollin
> -- Palm OS Emulator engineer
>
> P.S. Check out the new e-mail address. [EMAIL PROTECTED] will work
> for a while, but anyone mailing me needs to update to the new one
> eventually.
>
> --
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