error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:18:23 | LL | fn foo<T: Default>(v: Vec<T>, w: Vec<T>, mut x: Vec<T>, y: Vec<T>) -> Vec<T> { | ^^^^^^ help: consider changing the type to: `&[T]` | = note: `-D clippy::needless-pass-by-value` implied by `-D warnings` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:32:11 | LL | fn bar(x: String, y: Wrapper) { | ^^^^^^ help: consider changing the type to: `&str` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:32:22 | LL | fn bar(x: String, y: Wrapper) { | ^^^^^^^ help: consider taking a reference instead: `&Wrapper` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:38:71 | LL | fn test_borrow_trait<T: Borrow<str>, U: AsRef<str>, V>(t: T, u: U, v: V) { | ^ help: consider taking a reference instead: `&V` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:50:18 | LL | fn test_match(x: Option<Option<String>>, y: Option<Option<String>>) { | ^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&Option<Option<String>>` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:63:24 | LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) { | ^^^^^^^ help: consider taking a reference instead: `&Wrapper` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:63:36 | LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) { | ^^^^^^^ help: consider taking a reference instead: `&Wrapper` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:79:49 | LL | fn test_blanket_ref<T: Foo, S: Serialize>(_foo: T, _serializable: S) {} | ^ help: consider taking a reference instead: `&T` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:81:18 | LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) { | ^^^^^^ help: consider taking a reference instead: `&String` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:81:29 | LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) { | ^^^^^^ | help: consider changing the type to | LL | fn issue_2114(s: String, t: &str, u: Vec<i32>, v: Vec<i32>) { | ^^^^ help: change `t.clone()` to | LL | let _ = t.to_string(); | ^^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:81:40 | LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) { | ^^^^^^^^ help: consider taking a reference instead: `&Vec<i32>` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:81:53 | LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) { | ^^^^^^^^ | help: consider changing the type to | LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: &[i32]) { | ^^^^^^ help: change `v.clone()` to | LL | let _ = v.to_owned(); | ^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:94:12 | LL | s: String, | ^^^^^^ help: consider changing the type to: `&str` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:95:12 | LL | t: String, | ^^^^^^ help: consider taking a reference instead: `&String` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:104:23 | LL | fn baz(&self, _u: U, _s: Self) {} | ^ help: consider taking a reference instead: `&U` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:104:30 | LL | fn baz(&self, _u: U, _s: Self) {} | ^^^^ help: consider taking a reference instead: `&Self` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:126:24 | LL | fn bar_copy(x: u32, y: CopyWrapper) { | ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper` | help: consider marking this type as `Copy` --> $DIR/needless_pass_by_value.rs:124:1 | LL | struct CopyWrapper(u32); | ^^^^^^^^^^^^^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:132:29 | LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) { | ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper` | help: consider marking this type as `Copy` --> $DIR/needless_pass_by_value.rs:124:1 | LL | struct CopyWrapper(u32); | ^^^^^^^^^^^^^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:132:45 | LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) { | ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper` | help: consider marking this type as `Copy` --> $DIR/needless_pass_by_value.rs:124:1 | LL | struct CopyWrapper(u32); | ^^^^^^^^^^^^^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:132:61 | LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) { | ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper` | help: consider marking this type as `Copy` --> $DIR/needless_pass_by_value.rs:124:1 | LL | struct CopyWrapper(u32); | ^^^^^^^^^^^^^^^^^^^^^^^^ error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:144:40 | LL | fn some_fun<'b, S: Bar<'b, ()>>(_item: S) {} | ^ help: consider taking a reference instead: `&S` error: this argument is passed by value, but not consumed in the function body --> $DIR/needless_pass_by_value.rs:149:20 | LL | fn more_fun(_item: impl Club<'static, i32>) {} | ^^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&impl Club<'static, i32>` error: aborting due to 22 previous errors