Re: exceptions in Basic

Frank Schönheit - Sun Microsystems Germany wrote:

> Hi Andreas,
> 
>> Great, this would solve the problem. Maybe we then
should
>> think about a cheap solution, at least for now.
E.g. a spe-
>> cial object named CurrentUnoException or something
like
>> that could be provided by Basic in case an UNO
exception
>> error occurs containing the Exception object.
> 
> +1
> 
>> This would
>> match with the err variable concept and we wouldn't
have
>> to implement the complete try/catch syntax that
isn't
>> Basic like anyway.
> 
> Well ... how is "Basic like" defined? By the
Basic originally invented
> some decades ago, by one of the zillions of Basic
dialects out there, or
>  by what we me make of it? I certainly vote for the
latter ...
> 
> We also need, IMO, a "throw". (I think
Mathias will agree to me here.
> AFAIK, his repeated argueing for exception-less UNO API
originates from
> his team's experiences with existing API which could
not be used in
> Basic, since this would have required the script to
throw an exception.)
> If we would decide to have it, *not* having try/catch
would look ...
> senseless.

Yes, that's one point. The other point is a missing real
"catch"
support. The "On error goto" is not sufficient as
it doesn't allow to
specify where the program should continue in case an
exception got
caught (except by flooding your code with jump labels and
your
"exception handlers" with gazillions of Goto
statement).

If we had a usable exception support in OOo Basic we still
can have
problems with other languages like e.g. VBA but that might
be bearable.

I don't know wether our Scripting Framework and the possible
scripting
languages using it support exceptions. Andreas should know
better.

Ciao,
Mathias

-- 
Mathias Bauer (mba) - Project Lead OpenOffice.org Writer
OpenOffice.org Engineering at Sun: http://blogs.sun.com/Gu
llFOSS
Please don't reply to "nospamformbagmx.de".
I use it for the OOo lists and only rarely read other mails
sent to it.

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