[Cython] Higher fidelity translations from C++ exception to Python exception?

[Barry Warsaw]

On Jul 06, 2012, at 11:59 PM, Dag Sverre Seljebotn wrote:

>>The generated code does a `catch(...)` so you lose that useful information.
>>AFAICT, there's no way to find out within the catch clause (or anything
>>called by that clause) what C++ exception occurred.
>
>But that requires something more than a catch(...), right? There must be more
>syntax introduced in the Cython language to map C++ exceptions to constructor
>functions (taking exceptions of different types). Do you have a concrete
>proposal for how that could look like?

What about:

cdef void raise_fooexc(e) except *:
    raise MyPythonError(e.detail_1, e.detail_2)


cdef func(self) except +raise_fooexc(exception_type):
    something_that_raises_exception_type()

?

Then `exception_type` would get stuffed inside the catch() instead of ...

Cheers,
-Barry
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