pandas (original) (raw)

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The idea would be to have a signature that looks like this:

cdef inline uint8_t buf_get(Buffer buf, size_t offset, int *error):

Then within the function do something like:

if something_bad_happened: *error = 1

At least in C. I'm not as familiar with Cython semantics to know how that works. The caller passes error as an argument by address (&error) and then check after the call if it was set to 1 or not

This is just a generic approach; if it matters or not in your current design comes back to whether or not a sentinel can safely be reserved or not