123 lines
2.9 KiB
Rust
123 lines
2.9 KiB
Rust
#![warn(clippy::needless_borrowed_reference)]
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#![allow(
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unused,
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irrefutable_let_patterns,
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non_shorthand_field_patterns,
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clippy::needless_borrow,
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clippy::needless_if
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)]
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fn main() {}
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struct Struct {
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a: usize,
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b: usize,
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c: usize,
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}
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struct TupleStruct(u8, u8, u8);
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fn should_lint(
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array: [u8; 4],
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slice: &[u8],
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slice_of_refs: &[&u8],
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vec: Vec<u8>,
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tuple: (u8, u8, u8),
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tuple_struct: TupleStruct,
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s: Struct,
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) {
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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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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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if let &[&ref a, ref b] = slice_of_refs {}
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let &[ref a, ..] = &array;
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let &[ref a, ref b, ..] = &array;
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if let &[ref a, ref b] = slice {}
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if let &[ref a, ref b] = &vec[..] {}
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if let &[ref a, ref b, ..] = slice {}
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if let &[ref a, .., ref b] = slice {}
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if let &[.., ref a, ref b] = slice {}
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if let &[ref a, _] = slice {}
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if let &(ref a, ref b, ref c) = &tuple {}
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if let &(ref a, _, ref c) = &tuple {}
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if let &(ref a, ..) = &tuple {}
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if let &TupleStruct(ref a, ..) = &tuple_struct {}
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if let &Struct {
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ref a,
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b: ref b,
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c: ref renamed,
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} = &s
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{}
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if let &Struct { ref a, b: _, .. } = &s {}
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}
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fn should_not_lint(
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array: [u8; 4],
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slice: &[u8],
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slice_of_refs: &[&u8],
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vec: Vec<u8>,
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tuple: (u8, u8, u8),
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tuple_struct: TupleStruct,
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s: Struct,
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) {
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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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if let &(ref a, b, ..) = &tuple {}
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if let &TupleStruct(ref a, b, ..) = &tuple_struct {}
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if let &Struct { ref a, b, .. } = &s {}
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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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// the `&`s here technically could be removed, but it'd be noisy and without a `ref` doesn't match
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// the lint name
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if let &[] = slice {}
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if let &[_] = slice {}
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if let &[..] = slice {}
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if let &(..) = &tuple {}
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if let &TupleStruct(..) = &tuple_struct {}
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if let &Struct { .. } = &s {}
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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(a), &Animal::Dog(_)) => (),
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}
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}
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