mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-09-20 14:41:58 +00:00
271 lines
7.9 KiB
Rust
271 lines
7.9 KiB
Rust
#![allow(dead_code, clippy::explicit_auto_deref, clippy::useless_vec)]
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#![warn(clippy::search_is_some)]
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fn main() {
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let v = vec![3, 2, 1, 0, -1, -2, -3];
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let y = &&42;
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// Check `find().is_none()`, single-line case.
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let _ = v.iter().find(|&x| *x < 0).is_none();
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let _ = (0..1).find(|x| **y == *x).is_none(); // one dereference less
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let _ = (0..1).find(|x| *x == 0).is_none();
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let _ = v.iter().find(|x| **x == 0).is_none();
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let _ = (4..5).find(|x| *x == 1 || *x == 3 || *x == 5).is_none();
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let _ = (1..3).find(|x| [1, 2, 3].contains(x)).is_none();
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let _ = (1..3).find(|x| *x == 0 || [1, 2, 3].contains(x)).is_none();
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let _ = (1..3).find(|x| [1, 2, 3].contains(x) || *x == 0).is_none();
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let _ = (1..3)
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.find(|x| [1, 2, 3].contains(x) || *x == 0 || [4, 5, 6].contains(x) || *x == -1)
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.is_none();
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// Check `position().is_none()`, single-line case.
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let _ = v.iter().position(|&x| x < 0).is_none();
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// Check `rposition().is_none()`, single-line case.
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let _ = v.iter().rposition(|&x| x < 0).is_none();
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let s1 = String::from("hello world");
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let s2 = String::from("world");
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// caller of `find()` is a `&`static str`
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let _ = "hello world".find("world").is_none();
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let _ = "hello world".find(&s2).is_none();
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let _ = "hello world".find(&s2[2..]).is_none();
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// caller of `find()` is a `String`
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let _ = s1.find("world").is_none();
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let _ = s1.find(&s2).is_none();
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let _ = s1.find(&s2[2..]).is_none();
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// caller of `find()` is slice of `String`
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let _ = s1[2..].find("world").is_none();
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let _ = s1[2..].find(&s2).is_none();
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let _ = s1[2..].find(&s2[2..]).is_none();
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}
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#[allow(clippy::clone_on_copy, clippy::map_clone)]
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mod issue7392 {
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struct Player {
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hand: Vec<usize>,
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}
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fn filter() {
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let p = Player {
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hand: vec![1, 2, 3, 4, 5],
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};
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let filter_hand = vec![5];
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let _ = p
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.hand
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.iter()
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.filter(|c| filter_hand.iter().find(|cc| c == cc).is_none())
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.map(|c| c.clone())
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.collect::<Vec<_>>();
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}
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struct PlayerTuple {
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hand: Vec<(usize, char)>,
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}
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fn filter_tuple() {
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let p = PlayerTuple {
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hand: vec![(1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e')],
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};
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let filter_hand = vec![5];
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let _ = p
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.hand
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.iter()
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.filter(|(c, _)| filter_hand.iter().find(|cc| c == *cc).is_none())
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.map(|c| c.clone())
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.collect::<Vec<_>>();
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}
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fn field_projection() {
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struct Foo {
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foo: i32,
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bar: u32,
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}
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let vfoo = vec![Foo { foo: 1, bar: 2 }];
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let _ = vfoo.iter().find(|v| v.foo == 1 && v.bar == 2).is_none();
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let vfoo = vec![(42, Foo { foo: 1, bar: 2 })];
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let _ = vfoo
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.iter()
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.find(|(i, v)| *i == 42 && v.foo == 1 && v.bar == 2)
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.is_none();
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}
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fn index_projection() {
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let vfoo = vec![[0, 1, 2, 3]];
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let _ = vfoo.iter().find(|a| a[0] == 42).is_none();
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}
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#[allow(clippy::match_like_matches_macro)]
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fn slice_projection() {
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let vfoo = vec![[0, 1, 2, 3, 0, 1, 2, 3]];
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let _ = vfoo.iter().find(|sub| sub[1..4].len() == 3).is_none();
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}
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fn please(x: &u32) -> bool {
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*x == 9
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}
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fn deref_enough(x: u32) -> bool {
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x == 78
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}
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fn arg_no_deref(x: &&u32) -> bool {
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**x == 78
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}
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fn more_projections() {
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let x = 19;
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let ppx: &u32 = &x;
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let _ = [ppx].iter().find(|ppp_x: &&&u32| please(**ppp_x)).is_none();
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let _ = [String::from("Hey hey")].iter().find(|s| s.len() == 2).is_none();
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let v = vec![3, 2, 1, 0];
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let _ = v.iter().find(|x| deref_enough(**x)).is_none();
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let _ = v.iter().find(|x: &&u32| deref_enough(**x)).is_none();
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#[allow(clippy::redundant_closure)]
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let _ = v.iter().find(|x| arg_no_deref(x)).is_none();
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#[allow(clippy::redundant_closure)]
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let _ = v.iter().find(|x: &&u32| arg_no_deref(x)).is_none();
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}
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fn field_index_projection() {
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struct FooDouble {
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bar: Vec<Vec<i32>>,
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}
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struct Foo {
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bar: Vec<i32>,
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}
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struct FooOuter {
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inner: Foo,
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inner_double: FooDouble,
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}
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let vfoo = vec![FooOuter {
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inner: Foo { bar: vec![0, 1, 2, 3] },
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inner_double: FooDouble {
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bar: vec![vec![0, 1, 2, 3]],
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},
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}];
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let _ = vfoo
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.iter()
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.find(|v| v.inner_double.bar[0][0] == 2 && v.inner.bar[0] == 2)
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.is_none();
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}
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fn index_field_projection() {
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struct Foo {
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bar: i32,
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}
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struct FooOuter {
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inner: Vec<Foo>,
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}
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let vfoo = vec![FooOuter {
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inner: vec![Foo { bar: 0 }],
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}];
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let _ = vfoo.iter().find(|v| v.inner[0].bar == 2).is_none();
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}
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fn double_deref_index_projection() {
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let vfoo = vec![&&[0, 1, 2, 3]];
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let _ = vfoo.iter().find(|x| (**x)[0] == 9).is_none();
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}
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fn method_call_by_ref() {
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struct Foo {
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bar: u32,
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}
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impl Foo {
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pub fn by_ref(&self, x: &u32) -> bool {
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*x == self.bar
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}
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}
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let vfoo = vec![Foo { bar: 1 }];
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let _ = vfoo.iter().find(|v| v.by_ref(&v.bar)).is_none();
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}
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fn ref_bindings() {
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let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|(&x, y)| x == *y).is_none();
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let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|&(&x, y)| x == *y).is_none();
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}
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fn test_string_1(s: &str) -> bool {
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s.is_empty()
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}
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fn test_u32_1(s: &u32) -> bool {
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s.is_power_of_two()
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}
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fn test_u32_2(s: u32) -> bool {
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s.is_power_of_two()
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}
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fn projection_in_args_test() {
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// Index projections
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let lst = &[String::from("Hello"), String::from("world")];
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let v: Vec<&[String]> = vec![lst];
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let _ = v.iter().find(|s| s[0].is_empty()).is_none();
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let _ = v.iter().find(|s| test_string_1(&s[0])).is_none();
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// Field projections
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struct FieldProjection<'a> {
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field: &'a u32,
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}
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let field = 123456789;
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let instance = FieldProjection { field: &field };
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let v = vec![instance];
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let _ = v.iter().find(|fp| fp.field.is_power_of_two()).is_none();
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let _ = v.iter().find(|fp| test_u32_1(fp.field)).is_none();
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let _ = v.iter().find(|fp| test_u32_2(*fp.field)).is_none();
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}
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}
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mod issue_11910 {
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fn computations() -> u32 {
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0
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}
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struct Foo;
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impl Foo {
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fn bar(&self, _: bool) {}
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}
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fn test_normal_for_iter() {
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let v = vec![3, 2, 1, 0, -1, -2, -3];
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let _ = v.iter().find(|x| **x == 42).is_none();
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Foo.bar(v.iter().find(|x| **x == 42).is_none());
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}
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fn test_then_for_iter() {
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let v = vec![3, 2, 1, 0, -1, -2, -3];
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v.iter().find(|x| **x == 42).is_none().then(computations);
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}
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fn test_then_some_for_iter() {
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let v = vec![3, 2, 1, 0, -1, -2, -3];
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v.iter().find(|x| **x == 42).is_none().then_some(0);
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}
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fn test_normal_for_str() {
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let s = "hello";
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let _ = s.find("world").is_none();
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Foo.bar(s.find("world").is_none());
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let s = String::from("hello");
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let _ = s.find("world").is_none();
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Foo.bar(s.find("world").is_none());
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}
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fn test_then_for_str() {
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let s = "hello";
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let _ = s.find("world").is_none().then(computations);
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let s = String::from("hello");
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let _ = s.find("world").is_none().then(computations);
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}
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fn test_then_some_for_str() {
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let s = "hello";
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let _ = s.find("world").is_none().then_some(0);
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let s = String::from("hello");
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let _ = s.find("world").is_none().then_some(0);
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}
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}
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