- let iv = match eval_const_expr_partial(cx.tcx(), &index, ExprTypeChecked, None) {
- Ok(ConstVal::Int(i)) => i as u64,
- Ok(ConstVal::Uint(u)) => u,
- _ => cx.sess().span_bug(index.span,
- "index is not an integer-constant expression")
+ let iv = try!(const_expr(cx, &index, param_substs, fn_args, TrueConst::Yes)).0;
+ let iv = if let Some(iv) = const_to_opt_uint(iv) {
+ iv
+ } else {
+ cx.sess().span_bug(index.span, "index is not an integer-constant expression");