On 2/20/12 4:57 PM, H. S. Teoh wrote:
So I think what we should have is *both* data stored in fields in
Exception subclasses, and some kind of way to attach auxilliary data to
the exception. Say with Variant[string], or whatever way you prefer.
But Variant[string] should not be used for *everything*. That only leads
to problems. But then, it limits the usefulness of Variant[string],
because then you can't just pass it to the i18n formatter, since now
some fields are static but they may need to be part of the formatted
message.
Great. I'll plant the interface and submit it for destruction.
So we haven't really solved anything, we just added a new feature to
Exception which I'm not sure how useful it is. Do you have actual use
cases that requires adding data to exceptions? Without concrete examples
we're just arguing about hypotheticals.
I'm seeing plenty of that in our code base at work. They use exception
wrapping in conjunction with a fair amount of contortions because the
Variant[string] approach has not been designed.
Andrei
