error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. --> $DIR/ptr_arg.rs:15:14 | LL | fn do_vec(x: &Vec) { | ^^^^^^^^^ help: change this to: `&[i64]` | = note: `-D clippy::ptr-arg` implied by `-D warnings` error: writing `&String` instead of `&str` involves a new object where a slice will do. --> $DIR/ptr_arg.rs:24:14 | LL | fn do_str(x: &String) { | ^^^^^^^ help: change this to: `&str` error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. --> $DIR/ptr_arg.rs:37:18 | LL | fn do_vec(x: &Vec); | ^^^^^^^^^ help: change this to: `&[i64]` error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. --> $DIR/ptr_arg.rs:50:14 | LL | fn cloned(x: &Vec) -> Vec { | ^^^^^^^^ help: change this to | LL | fn cloned(x: &[u8]) -> Vec { | ^^^^^ help: change `x.clone()` to | LL | let e = x.to_owned(); | ^^^^^^^^^^^^ help: change `x.clone()` to | LL | x.to_owned() | error: writing `&String` instead of `&str` involves a new object where a slice will do. --> $DIR/ptr_arg.rs:59:18 | LL | fn str_cloned(x: &String) -> String { | ^^^^^^^ help: change this to | LL | fn str_cloned(x: &str) -> String { | ^^^^ help: change `x.clone()` to | LL | let a = x.to_string(); | ^^^^^^^^^^^^^ help: change `x.clone()` to | LL | let b = x.to_string(); | ^^^^^^^^^^^^^ help: change `x.clone()` to | LL | x.to_string() | error: writing `&String` instead of `&str` involves a new object where a slice will do. --> $DIR/ptr_arg.rs:67:44 | LL | fn false_positive_capacity(x: &Vec, y: &String) { | ^^^^^^^ help: change this to | LL | fn false_positive_capacity(x: &Vec, y: &str) { | ^^^^ help: change `y.clone()` to | LL | let b = y.to_string(); | ^^^^^^^^^^^^^ help: change `y.as_str()` to | LL | let c = y; | ^ error: using a reference to `Cow` is not recommended. --> $DIR/ptr_arg.rs:81:25 | LL | fn test_cow_with_ref(c: &Cow<[i32]>) {} | ^^^^^^^^^^^ help: change this to: `&[i32]` error: aborting due to 7 previous errors