Function t_cplx_elt 

pub unsafe extern "C-unwind" fn t_cplx_elt<T: AltComplex>(
    x: SEXP,
    i: R_xlen_t,
) -> Rcomplex

Trampoline for complex Elt method.

Safety

x must be a valid ALTREP CPLXSXP and i within bounds.