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# Test function exports
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cdef double plus1_cython(double a, int *error_flag, void *user_data) nogil except *
cdef double plus1b_cython(double a, double b, int *error_flag, void *user_data) nogil except *
cdef double plus1bc_cython(double a, double b, double c, int *error_flag, void *user_data) nogil except *

cdef double sine(double a, void *user_data) nogil except *