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.