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// run-rustfix
#[warn(clippy::needless_borrowed_reference)]
#[allow(unused_variables)]
fn main() {
let mut v = Vec::<String>::new();
let _ = v.iter_mut().filter(|&ref a| a.is_empty());
// ^ should be linted
let var = 3;
let thingy = Some(&var);
if let Some(&ref v) = thingy {
// ^ should be linted
}
let mut var2 = 5;
let thingy2 = Some(&mut var2);
if let Some(&mut ref mut v) = thingy2 {
// ^ should **not** be linted
// v is borrowed as mutable.
*v = 10;
}
if let Some(&mut ref v) = thingy2 {
// ^ should **not** be linted
// here, v is borrowed as immutable.
// can't do that:
//*v = 15;
}
}
#[allow(dead_code)]
enum Animal {
Cat(u64),
Dog(u64),
}
#[allow(unused_variables)]
#[allow(dead_code)]
fn foo(a: &Animal, b: &Animal) {
match (a, b) {
(&Animal::Cat(v), &ref k) | (&ref k, &Animal::Cat(v)) => (), // lifetime mismatch error if there is no '&ref'
// ^ and ^ should **not** be linted
(&Animal::Dog(ref a), &Animal::Dog(_)) => (), // ^ should **not** be linted
}
}
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