On Tue, Sep 18, 2018, 10:12 AM Jeroen Demeyer <J.Demeyer@ugent.be> wrote:
On 2018-09-17 15:44, Robert Bradshaw wrote:
One of the pain points in Cython is that one must explicitly annotate non-object returning functions with except clauses. Would it be worth trying to change the default here, making exception-suppressing opt-in rather than opt-out?
Just to clarify things: are you proposing that the default would be "except *"?
We may choose an implicit default exception value. An alternative would be to give *warnings* for functions where
exceptions could occur but could not be propagated. For example, this function is totally fine:
cdef int foo(int x): return x
but this function would give a warning:
cdef int foo(x): return x # implicit conversion Python -> int
Given that essentially every Python operation can raise exceptions, I don't know how useful this warning would be. Unless we expect everyone to change their code. and this should probably be a compile-time error:
cdef int foo(x): raise NotImplementedError
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