3 #![warn(clippy::search_is_some)]
6 let v = vec![3, 2, 1, 0, -1, -2, -3];
9 // Check `find().is_some()`, single-line case.
10 let _ = v.iter().find(|&x| *x < 0).is_some();
11 let _ = (0..1).find(|x| **y == *x).is_some(); // one dereference less
12 let _ = (0..1).find(|x| *x == 0).is_some();
13 let _ = v.iter().find(|x| **x == 0).is_some();
14 let _ = (4..5).find(|x| *x == 1 || *x == 3 || *x == 5).is_some();
15 let _ = (1..3).find(|x| [1, 2, 3].contains(x)).is_some();
16 let _ = (1..3).find(|x| *x == 0 || [1, 2, 3].contains(x)).is_some();
17 let _ = (1..3).find(|x| [1, 2, 3].contains(x) || *x == 0).is_some();
19 .find(|x| [1, 2, 3].contains(x) || *x == 0 || [4, 5, 6].contains(x) || *x == -1)
22 // Check `position().is_some()`, single-line case.
23 let _ = v.iter().position(|&x| x < 0).is_some();
25 // Check `rposition().is_some()`, single-line case.
26 let _ = v.iter().rposition(|&x| x < 0).is_some();
28 let s1 = String::from("hello world");
29 let s2 = String::from("world");
30 // caller of `find()` is a `&`static str`
31 let _ = "hello world".find("world").is_some();
32 let _ = "hello world".find(&s2).is_some();
33 let _ = "hello world".find(&s2[2..]).is_some();
34 // caller of `find()` is a `String`
35 let _ = s1.find("world").is_some();
36 let _ = s1.find(&s2).is_some();
37 let _ = s1.find(&s2[2..]).is_some();
38 // caller of `find()` is slice of `String`
39 let _ = s1[2..].find("world").is_some();
40 let _ = s1[2..].find(&s2).is_some();
41 let _ = s1[2..].find(&s2[2..]).is_some();
44 #[allow(clippy::clone_on_copy, clippy::map_clone)]
51 hand: vec![1, 2, 3, 4, 5],
53 let filter_hand = vec![5];
57 .filter(|c| filter_hand.iter().find(|cc| c == cc).is_some())
63 hand: Vec<(usize, char)>,
67 hand: vec![(1, 'a'), (2, 'b'), (3, 'c'), (4, 'd'), (5, 'e')],
69 let filter_hand = vec![5];
73 .filter(|(c, _)| filter_hand.iter().find(|cc| c == *cc).is_some())
78 fn field_projection() {
83 let vfoo = vec![Foo { foo: 1, bar: 2 }];
84 let _ = vfoo.iter().find(|v| v.foo == 1 && v.bar == 2).is_some();
86 let vfoo = vec![(42, Foo { foo: 1, bar: 2 })];
89 .find(|(i, v)| *i == 42 && v.foo == 1 && v.bar == 2)
93 fn index_projection() {
94 let vfoo = vec![[0, 1, 2, 3]];
95 let _ = vfoo.iter().find(|a| a[0] == 42).is_some();
98 #[allow(clippy::match_like_matches_macro)]
99 fn slice_projection() {
100 let vfoo = vec![[0, 1, 2, 3, 0, 1, 2, 3]];
101 let _ = vfoo.iter().find(|sub| sub[1..4].len() == 3).is_some();
104 fn please(x: &u32) -> bool {
108 fn deref_enough(x: u32) -> bool {
112 fn arg_no_deref(x: &&u32) -> bool {
116 fn more_projections() {
119 let _ = [ppx].iter().find(|ppp_x: &&&u32| please(**ppp_x)).is_some();
120 let _ = [String::from("Hey hey")].iter().find(|s| s.len() == 2).is_some();
122 let v = vec![3, 2, 1, 0];
123 let _ = v.iter().find(|x| deref_enough(**x)).is_some();
124 let _ = v.iter().find(|x: &&u32| deref_enough(**x)).is_some();
126 #[allow(clippy::redundant_closure)]
127 let _ = v.iter().find(|x| arg_no_deref(x)).is_some();
128 #[allow(clippy::redundant_closure)]
129 let _ = v.iter().find(|x: &&u32| arg_no_deref(x)).is_some();
132 fn field_index_projection() {
141 inner_double: FooDouble,
143 let vfoo = vec![FooOuter {
144 inner: Foo { bar: vec![0, 1, 2, 3] },
145 inner_double: FooDouble {
146 bar: vec![vec![0, 1, 2, 3]],
151 .find(|v| v.inner_double.bar[0][0] == 2 && v.inner.bar[0] == 2)
155 fn index_field_projection() {
162 let vfoo = vec![FooOuter {
163 inner: vec![Foo { bar: 0 }],
165 let _ = vfoo.iter().find(|v| v.inner[0].bar == 2).is_some();
168 fn double_deref_index_projection() {
169 let vfoo = vec![&&[0, 1, 2, 3]];
170 let _ = vfoo.iter().find(|x| (**x)[0] == 9).is_some();
173 fn method_call_by_ref() {
178 pub fn by_ref(&self, x: &u32) -> bool {
182 let vfoo = vec![Foo { bar: 1 }];
183 let _ = vfoo.iter().find(|v| v.by_ref(&v.bar)).is_some();
187 let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|(&x, y)| x == *y).is_some();
188 let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|&(&x, y)| x == *y).is_some();
191 fn test_string_1(s: &str) -> bool {
195 fn test_u32_1(s: &u32) -> bool {
199 fn test_u32_2(s: u32) -> bool {
203 fn projection_in_args_test() {
205 let lst = &[String::from("Hello"), String::from("world")];
206 let v: Vec<&[String]> = vec![lst];
207 let _ = v.iter().find(|s| s[0].is_empty()).is_some();
208 let _ = v.iter().find(|s| test_string_1(&s[0])).is_some();
211 struct FieldProjection<'a> {
214 let field = 123456789;
215 let instance = FieldProjection { field: &field };
216 let v = vec![instance];
217 let _ = v.iter().find(|fp| fp.field.is_power_of_two()).is_some();
218 let _ = v.iter().find(|fp| test_u32_1(fp.field)).is_some();
219 let _ = v.iter().find(|fp| test_u32_2(*fp.field)).is_some();