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#![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_some()`, single-line case.
let _ = v.iter().find(|&x| *x < 0).is_some();
let _ = (0..1).find(|x| **y == *x).is_some(); // one dereference less
let _ = (0..1).find(|x| *x == 0).is_some();
let _ = v.iter().find(|x| **x == 0).is_some();
let _ = (4..5).find(|x| *x == 1 || *x == 3 || *x == 5).is_some();
let _ = (1..3).find(|x| [1, 2, 3].contains(x)).is_some();
let _ = (1..3).find(|x| *x == 0 || [1, 2, 3].contains(x)).is_some();
let _ = (1..3).find(|x| [1, 2, 3].contains(x) || *x == 0).is_some();
let _ = (1..3)
.find(|x| [1, 2, 3].contains(x) || *x == 0 || [4, 5, 6].contains(x) || *x == -1)
.is_some();
// Check `position().is_some()`, single-line case.
let _ = v.iter().position(|&x| x < 0).is_some();
// Check `rposition().is_some()`, single-line case.
let _ = v.iter().rposition(|&x| x < 0).is_some();
let s1 = String::from("hello world");
let s2 = String::from("world");
// caller of `find()` is a `&`static str`
let _ = "hello world".find("world").is_some();
let _ = "hello world".find(&s2).is_some();
let _ = "hello world".find(&s2[2..]).is_some();
// caller of `find()` is a `String`
let _ = s1.find("world").is_some();
let _ = s1.find(&s2).is_some();
let _ = s1.find(&s2[2..]).is_some();
// caller of `find()` is slice of `String`
let _ = s1[2..].find("world").is_some();
let _ = s1[2..].find(&s2).is_some();
let _ = s1[2..].find(&s2[2..]).is_some();
}
#[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_some())
.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_some())
.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_some();
let vfoo = vec![(42, Foo { foo: 1, bar: 2 })];
let _ = vfoo
.iter()
.find(|(i, v)| *i == 42 && v.foo == 1 && v.bar == 2)
.is_some();
}
fn index_projection() {
let vfoo = vec![[0, 1, 2, 3]];
let _ = vfoo.iter().find(|a| a[0] == 42).is_some();
}
#[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_some();
}
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_some();
let _ = [String::from("Hey hey")].iter().find(|s| s.len() == 2).is_some();
let v = vec![3, 2, 1, 0];
let _ = v.iter().find(|x| deref_enough(**x)).is_some();
let _ = v.iter().find(|x: &&u32| deref_enough(**x)).is_some();
#[allow(clippy::redundant_closure)]
let _ = v.iter().find(|x| arg_no_deref(x)).is_some();
#[allow(clippy::redundant_closure)]
let _ = v.iter().find(|x: &&u32| arg_no_deref(x)).is_some();
}
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_some();
}
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_some();
}
fn double_deref_index_projection() {
let vfoo = vec![&&[0, 1, 2, 3]];
let _ = vfoo.iter().find(|x| (**x)[0] == 9).is_some();
}
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_some();
}
fn ref_bindings() {
let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|(&x, y)| x == *y).is_some();
let _ = [&(&1, 2), &(&3, 4), &(&5, 4)].iter().find(|&(&x, y)| x == *y).is_some();
}
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_some();
let _ = v.iter().find(|s| test_string_1(&s[0])).is_some();
// 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_some();
let _ = v.iter().find(|fp| test_u32_1(fp.field)).is_some();
let _ = v.iter().find(|fp| test_u32_2(*fp.field)).is_some();
}
}
mod issue9120 {
fn make_arg_no_deref_impl() -> impl Fn(&&u32) -> bool {
move |x: &&u32| **x == 78
}
fn make_arg_no_deref_dyn() -> Box<dyn Fn(&&u32) -> bool> {
Box::new(move |x: &&u32| **x == 78)
}
fn wrapper<T: Fn(&&u32) -> bool>(v: Vec<u32>, func: T) -> bool {
#[allow(clippy::redundant_closure)]
v.iter().find(|x: &&u32| func(x)).is_some()
}
fn do_tests() {
let v = vec![3, 2, 1, 0];
let arg_no_deref_impl = make_arg_no_deref_impl();
let arg_no_deref_dyn = make_arg_no_deref_dyn();
#[allow(clippy::redundant_closure)]
let _ = v.iter().find(|x: &&u32| arg_no_deref_impl(x)).is_some();
#[allow(clippy::redundant_closure)]
let _ = v.iter().find(|x: &&u32| arg_no_deref_dyn(x)).is_some();
#[allow(clippy::redundant_closure)]
let _ = v.iter().find(|x: &&u32| (*arg_no_deref_dyn)(x)).is_some();
}
}
|
