error: `ref` directly on a function argument is ignored. Consider using a reference type instead. --> $DIR/toplevel_ref_arg.rs:4:15 | LL | fn the_answer(ref mut x: u8) { | ^^^^^^^^^ | = note: `-D clippy::toplevel-ref-arg` implied by `-D warnings` error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead --> $DIR/toplevel_ref_arg.rs:15:9 | LL | let ref x = 1; | ----^^^^^----- help: try: `let x = &1;` error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead --> $DIR/toplevel_ref_arg.rs:17:9 | LL | let ref y: (&_, u8) = (&1, 2); | ----^^^^^--------------------- help: try: `let y: &(&_, u8) = &(&1, 2);` error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead --> $DIR/toplevel_ref_arg.rs:19:9 | LL | let ref z = 1 + 2; | ----^^^^^--------- help: try: `let z = &(1 + 2);` error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead --> $DIR/toplevel_ref_arg.rs:21:9 | LL | let ref mut z = 1 + 2; | ----^^^^^^^^^--------- help: try: `let z = &mut (1 + 2);` error: aborting due to 5 previous errors