error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. --> $DIR/ptr_arg.rs:6:14 | LL | fn do_vec(x: &Vec<i64>) { | ^^^^^^^^^ 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:15:14 | 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:28:18 | LL | fn do_vec(x: &Vec<i64>); | ^^^^^^^^^ 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:41:14 | LL | fn cloned(x: &Vec<u8>) -> Vec<u8> { | ^^^^^^^^ | help: change this to | LL | fn cloned(x: &[u8]) -> Vec<u8> { | ^^^^^ 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:50:18 | 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:58:44 | LL | fn false_positive_capacity(x: &Vec<u8>, y: &String) { | ^^^^^^^ | help: change this to | LL | fn false_positive_capacity(x: &Vec<u8>, 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:72:25 | LL | fn test_cow_with_ref(c: &Cow<[i32]>) {} | ^^^^^^^^^^^ help: change this to: `&[i32]` error: aborting due to 7 previous errors