65 lines
1.8 KiB
Rust
65 lines
1.8 KiB
Rust
// run-rustfix
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#![warn(clippy::needless_borrowed_reference)]
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#![allow(unused, clippy::needless_borrow)]
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fn main() {}
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fn should_lint(array: [u8; 4], slice: &[u8], slice_of_refs: &[&u8], vec: Vec<u8>) {
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let mut v = Vec::<String>::new();
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let _ = v.iter_mut().filter(|a| a.is_empty());
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let var = 3;
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let thingy = Some(&var);
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if let Some(v) = thingy {}
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if let &[a, ref b] = slice_of_refs {}
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let [a, ..] = &array;
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let [a, b, ..] = &array;
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if let [a, b] = slice {}
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if let [a, b] = &vec[..] {}
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if let [a, b, ..] = slice {}
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if let [a, .., b] = slice {}
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if let [.., a, b] = slice {}
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}
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fn should_not_lint(array: [u8; 4], slice: &[u8], slice_of_refs: &[&u8], vec: Vec<u8>) {
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if let [ref a] = slice {}
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if let &[ref a, b] = slice {}
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if let &[ref a, .., b] = slice {}
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// must not be removed as variables must be bound consistently across | patterns
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if let (&[ref a], _) | ([], ref a) = (slice_of_refs, &1u8) {}
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let mut var2 = 5;
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let thingy2 = Some(&mut var2);
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if let Some(&mut ref mut v) = thingy2 {
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// ^ should **not** be linted
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// v is borrowed as mutable.
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*v = 10;
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}
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if let Some(&mut ref v) = thingy2 {
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// ^ should **not** be linted
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// here, v is borrowed as immutable.
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// can't do that:
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//*v = 15;
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}
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}
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enum Animal {
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Cat(u64),
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Dog(u64),
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}
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fn foo(a: &Animal, b: &Animal) {
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match (a, b) {
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// lifetime mismatch error if there is no '&ref' before `feature(nll)` stabilization in 1.63
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(&Animal::Cat(v), &ref k) | (&ref k, &Animal::Cat(v)) => (),
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// ^ and ^ should **not** be linted
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(&Animal::Dog(ref a), &Animal::Dog(_)) => (), // ^ should **not** be linted
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}
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}
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