[pypy-dev] Throwing arbitrary objects as exceptions (was Re: DLS paper on RPython)
niko at alum.mit.edu
Thu May 17 22:07:12 CEST 2007
I guess the question is whether people consider the ability to throw
arbitrary objects (rather than only those whose type is a subtype of
Exception) a feature or a bug.
I'm on the fence myself: it makes translating to the jvm and clr
easier if we prohibit arbitrary objects, and it seems like a marginal
use-case, but on the other hand, well, Python can do it, so why not?
If anyone wanted to give me a few pointers as to what has to be
changed to force exceptions to be subtypes of Exception, I'd be
excited to try hacking it, just so I can learn more about that part
On the other hand, I think that a hybrid wrapping strategy could
actually work reasonably well and avoid wrapping in the 99% of cases
where Exception sub-types are thrown and caught.
Therefore, I'd say the real question is how people on the list think
that RPython "ought" to behave.
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