3 #[warn(clippy::all, clippy::needless_borrow)]
4 #[allow(unused_variables, clippy::unnecessary_mut_passed)]
8 let _ = x(&a); // no warning
12 mut_ref(&mut b); // no warning
13 mut_ref(&mut b); // warn
15 let s = &String::from("hi");
16 let s_ident = f(&s); // should not error, because `&String` implements Copy, but `String` does not
17 let g_val = g(&Vec::new()); // should not error, because `&Vec<T>` derefs to `&[T]`
19 let vec_val = g(&vec); // should not error, because `&Vec<T>` derefs to `&[T]`
20 h(&"foo"); // should not error, because the `&&str` is required, due to `&Trait`
21 let garbl = match 42 {
50 #[allow(clippy::needless_borrowed_reference)]
51 fn x(y: &i32) -> i32 {
55 fn mut_ref(y: &mut i32) {
59 fn f<T: Copy>(y: &T) -> T {
63 fn g(y: &[u8]) -> u8 {
69 impl<'a> Trait for &'a str {}
71 fn h(_: &dyn Trait) {}