mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-30 16:39:26 +00:00
221 lines
6.6 KiB
Rust
221 lines
6.6 KiB
Rust
#![allow(dead_code, clippy::explicit_auto_deref, clippy::useless_vec)]
|
|
#![warn(clippy::search_is_some)]
|
|
|
|
fn main() {
|
|
let v = vec![3, 2, 1, 0, -1, -2, -3];
|
|
let y = &&42;
|
|
|
|
// Check `find().is_none()`, single-line case.
|
|
let _ = v.iter().find(|&x| *x < 0).is_none();
|
|
let _ = (0..1).find(|x| **y == *x).is_none(); // one dereference less
|
|
let _ = (0..1).find(|x| *x == 0).is_none();
|
|
let _ = v.iter().find(|x| **x == 0).is_none();
|
|
let _ = (4..5).find(|x| *x == 1 || *x == 3 || *x == 5).is_none();
|
|
let _ = (1..3).find(|x| [1, 2, 3].contains(x)).is_none();
|
|
let _ = (1..3).find(|x| *x == 0 || [1, 2, 3].contains(x)).is_none();
|
|
let _ = (1..3).find(|x| [1, 2, 3].contains(x) || *x == 0).is_none();
|
|
let _ = (1..3)
|
|
.find(|x| [1, 2, 3].contains(x) || *x == 0 || [4, 5, 6].contains(x) || *x == -1)
|
|
.is_none();
|
|
|
|
// Check `position().is_none()`, single-line case.
|
|
let _ = v.iter().position(|&x| x < 0).is_none();
|
|
|
|
// Check `rposition().is_none()`, single-line case.
|
|
let _ = v.iter().rposition(|&x| x < 0).is_none();
|
|
|
|
let s1 = String::from("hello world");
|
|
let s2 = String::from("world");
|
|
|
|
// caller of `find()` is a `&`static str`
|
|
let _ = "hello world".find("world").is_none();
|
|
let _ = "hello world".find(&s2).is_none();
|
|
let _ = "hello world".find(&s2[2..]).is_none();
|
|
// caller of `find()` is a `String`
|
|
let _ = s1.find("world").is_none();
|
|
let _ = s1.find(&s2).is_none();
|
|
let _ = s1.find(&s2[2..]).is_none();
|
|
// caller of `find()` is slice of `String`
|
|
let _ = s1[2..].find("world").is_none();
|
|
let _ = s1[2..].find(&s2).is_none();
|
|
let _ = s1[2..].find(&s2[2..]).is_none();
|
|
}
|
|
|
|
#[allow(clippy::clone_on_copy, clippy::map_clone)]
|
|
mod issue7392 {
|
|
struct Player {
|
|
hand: Vec<usize>,
|
|
}
|
|
fn filter() {
|
|
let p = Player {
|
|
hand: vec![1, 2, 3, 4, 5],
|
|
};
|
|
let filter_hand = vec![5];
|
|
let _ = p
|
|
.hand
|
|
.iter()
|
|
.filter(|c| filter_hand.iter().find(|cc| c == cc).is_none())
|
|
.map(|c| c.clone())
|
|
.collect::<Vec<_>>();
|
|
}
|
|
|
|
struct PlayerTuple {
|
|
hand: Vec<(usize, char)>,
|
|
}
|
|
fn filter_tuple() {
|
|
let p = PlayerTuple {
|
|
hand: vec![(1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e')],
|
|
};
|
|
let filter_hand = vec![5];
|
|
let _ = p
|
|
.hand
|
|
.iter()
|
|
.filter(|(c, _)| filter_hand.iter().find(|cc| c == *cc).is_none())
|
|
.map(|c| c.clone())
|
|
.collect::<Vec<_>>();
|
|
}
|
|
|
|
fn field_projection() {
|
|
struct Foo {
|
|
foo: i32,
|
|
bar: u32,
|
|
}
|
|
let vfoo = vec![Foo { foo: 1, bar: 2 }];
|
|
let _ = vfoo.iter().find(|v| v.foo == 1 && v.bar == 2).is_none();
|
|
|
|
let vfoo = vec![(42, Foo { foo: 1, bar: 2 })];
|
|
let _ = vfoo
|
|
.iter()
|
|
.find(|(i, v)| *i == 42 && v.foo == 1 && v.bar == 2)
|
|
.is_none();
|
|
}
|
|
|
|
fn index_projection() {
|
|
let vfoo = vec![[0, 1, 2, 3]];
|
|
let _ = vfoo.iter().find(|a| a[0] == 42).is_none();
|
|
}
|
|
|
|
#[allow(clippy::match_like_matches_macro)]
|
|
fn slice_projection() {
|
|
let vfoo = vec![[0, 1, 2, 3, 0, 1, 2, 3]];
|
|
let _ = vfoo.iter().find(|sub| sub[1..4].len() == 3).is_none();
|
|
}
|
|
|
|
fn please(x: &u32) -> bool {
|
|
*x == 9
|
|
}
|
|
|
|
fn deref_enough(x: u32) -> bool {
|
|
x == 78
|
|
}
|
|
|
|
fn arg_no_deref(x: &&u32) -> bool {
|
|
**x == 78
|
|
}
|
|
|
|
fn more_projections() {
|
|
let x = 19;
|
|
let ppx: &u32 = &x;
|
|
let _ = [ppx].iter().find(|ppp_x: &&&u32| please(**ppp_x)).is_none();
|
|
let _ = [String::from("Hey hey")].iter().find(|s| s.len() == 2).is_none();
|
|
|
|
let v = vec![3, 2, 1, 0];
|
|
let _ = v.iter().find(|x| deref_enough(**x)).is_none();
|
|
let _ = v.iter().find(|x: &&u32| deref_enough(**x)).is_none();
|
|
|
|
#[allow(clippy::redundant_closure)]
|
|
let _ = v.iter().find(|x| arg_no_deref(x)).is_none();
|
|
#[allow(clippy::redundant_closure)]
|
|
let _ = v.iter().find(|x: &&u32| arg_no_deref(x)).is_none();
|
|
}
|
|
|
|
fn field_index_projection() {
|
|
struct FooDouble {
|
|
bar: Vec<Vec<i32>>,
|
|
}
|
|
struct Foo {
|
|
bar: Vec<i32>,
|
|
}
|
|
struct FooOuter {
|
|
inner: Foo,
|
|
inner_double: FooDouble,
|
|
}
|
|
let vfoo = vec![FooOuter {
|
|
inner: Foo { bar: vec![0, 1, 2, 3] },
|
|
inner_double: FooDouble {
|
|
bar: vec![vec![0, 1, 2, 3]],
|
|
},
|
|
}];
|
|
let _ = vfoo
|
|
.iter()
|
|
.find(|v| v.inner_double.bar[0][0] == 2 && v.inner.bar[0] == 2)
|
|
.is_none();
|
|
}
|
|
|
|
fn index_field_projection() {
|
|
struct Foo {
|
|
bar: i32,
|
|
}
|
|
struct FooOuter {
|
|
inner: Vec<Foo>,
|
|
}
|
|
let vfoo = vec![FooOuter {
|
|
inner: vec![Foo { bar: 0 }],
|
|
}];
|
|
let _ = vfoo.iter().find(|v| v.inner[0].bar == 2).is_none();
|
|
}
|
|
|
|
fn double_deref_index_projection() {
|
|
let vfoo = vec![&&[0, 1, 2, 3]];
|
|
let _ = vfoo.iter().find(|x| (**x)[0] == 9).is_none();
|
|
}
|
|
|
|
fn method_call_by_ref() {
|
|
struct Foo {
|
|
bar: u32,
|
|
}
|
|
impl Foo {
|
|
pub fn by_ref(&self, x: &u32) -> bool {
|
|
*x == self.bar
|
|
}
|
|
}
|
|
let vfoo = vec![Foo { bar: 1 }];
|
|
let _ = vfoo.iter().find(|v| v.by_ref(&v.bar)).is_none();
|
|
}
|
|
|
|
fn ref_bindings() {
|
|
let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|(&x, y)| x == *y).is_none();
|
|
let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|&(&x, y)| x == *y).is_none();
|
|
}
|
|
|
|
fn test_string_1(s: &str) -> bool {
|
|
s.is_empty()
|
|
}
|
|
|
|
fn test_u32_1(s: &u32) -> bool {
|
|
s.is_power_of_two()
|
|
}
|
|
|
|
fn test_u32_2(s: u32) -> bool {
|
|
s.is_power_of_two()
|
|
}
|
|
|
|
fn projection_in_args_test() {
|
|
// Index projections
|
|
let lst = &[String::from("Hello"), String::from("world")];
|
|
let v: Vec<&[String]> = vec![lst];
|
|
let _ = v.iter().find(|s| s[0].is_empty()).is_none();
|
|
let _ = v.iter().find(|s| test_string_1(&s[0])).is_none();
|
|
|
|
// Field projections
|
|
struct FieldProjection<'a> {
|
|
field: &'a u32,
|
|
}
|
|
let field = 123456789;
|
|
let instance = FieldProjection { field: &field };
|
|
let v = vec![instance];
|
|
let _ = v.iter().find(|fp| fp.field.is_power_of_two()).is_none();
|
|
let _ = v.iter().find(|fp| test_u32_1(fp.field)).is_none();
|
|
let _ = v.iter().find(|fp| test_u32_2(*fp.field)).is_none();
|
|
}
|
|
}
|