2
0
Fork 0
mirror of https://github.com/rust-lang/rust-clippy synced 2024-12-27 21:43:30 +00:00
rust-clippy/tests/ui/needless_borrow.fixed
2020-04-02 18:56:10 -07:00

61 lines
1.4 KiB
Rust

// run-rustfix
#![allow(clippy::needless_borrowed_reference)]
fn x(y: &i32) -> i32 {
*y
}
#[warn(clippy::all, clippy::needless_borrow)]
#[allow(unused_variables)]
fn main() {
let a = 5;
let b = x(&a);
let c = x(&a);
let s = &String::from("hi");
let s_ident = f(&s); // should not error, because `&String` implements Copy, but `String` does not
let g_val = g(&Vec::new()); // should not error, because `&Vec<T>` derefs to `&[T]`
let vec = Vec::new();
let vec_val = g(&vec); // should not error, because `&Vec<T>` derefs to `&[T]`
h(&"foo"); // should not error, because the `&&str` is required, due to `&Trait`
if let Some(cake) = Some(&5) {}
let garbl = match 42 {
44 => &a,
45 => {
println!("foo");
&&a // FIXME: this should lint, too
},
46 => &a,
_ => panic!(),
};
}
fn f<T: Copy>(y: &T) -> T {
*y
}
fn g(y: &[u8]) -> u8 {
y[0]
}
trait Trait {}
impl<'a> Trait for &'a str {}
fn h(_: &dyn Trait) {}
#[warn(clippy::needless_borrow)]
#[allow(dead_code)]
fn issue_1432() {
let mut v = Vec::<String>::new();
let _ = v.iter_mut().filter(|&ref a| a.is_empty());
let _ = v.iter().filter(|&a| a.is_empty());
let _ = v.iter().filter(|&a| a.is_empty());
}
#[allow(dead_code)]
#[warn(clippy::needless_borrow)]
#[derive(Debug)]
enum Foo<'a> {
Str(&'a str),
}