Function gmp_mpfr_sys::mpfr::mpfr_can_round

pub unsafe extern fn mpfr_can_round(arg1: mpfr_srcptr,
                                    arg2: mpfr_exp_t,
                                    arg3: mpfr_rnd_t,
                                    arg4: mpfr_rnd_t,
                                    arg5: mpfr_prec_t)
                                    -> c_int