mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-05 02:50:32 +00:00
45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
// run-rustfix
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#[warn(clippy::needless_borrowed_reference)]
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#[allow(unused_variables)]
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fn main() {
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let mut v = Vec::<String>::new();
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let _ = v.iter_mut().filter(|&ref a| a.is_empty());
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// ^ should be linted
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let var = 3;
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let thingy = Some(&var);
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if let Some(&ref v) = thingy {
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// ^ should be linted
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}
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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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#[allow(dead_code)]
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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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#[allow(unused_variables)]
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#[allow(dead_code)]
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fn foo(a: &Animal, b: &Animal) {
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match (a, b) {
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(&Animal::Cat(v), &ref k) | (&ref k, &Animal::Cat(v)) => (), // lifetime mismatch error if there is no '&ref'
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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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