Function gmp_mpfr_sys::mpfr::atan2u

pub unsafe extern "C" fn atan2u(
    rop: *mut mpfr_t,
    y: *const mpfr_t,
    x: *const mpfr_t,
    u: c_ulong,
    rnd: rnd_t,
) -> c_int

See: mpfr_atan2u