1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// run-rustfix
#![allow(unused, clippy::suspicious_map, clippy::iter_count)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, LinkedList};
#[warn(clippy::needless_collect)]
#[allow(unused_variables, clippy::iter_cloned_collect, clippy::iter_next_slice)]
fn main() {
let sample = [1; 5];
let len = sample.iter().count();
if sample.iter().next().is_none() {
// Empty
}
sample.iter().cloned().any(|x| x == 1);
// #7164 HashMap's and BTreeMap's `len` usage should not be linted
sample.iter().map(|x| (x, x)).collect::<HashMap<_, _>>().len();
sample.iter().map(|x| (x, x)).collect::<BTreeMap<_, _>>().len();
sample.iter().map(|x| (x, x)).next().is_none();
sample.iter().map(|x| (x, x)).next().is_none();
// Notice the `HashSet`--this should not be linted
sample.iter().collect::<HashSet<_>>().len();
// Neither should this
sample.iter().collect::<BTreeSet<_>>().len();
sample.iter().count();
sample.iter().next().is_none();
sample.iter().cloned().any(|x| x == 1);
sample.iter().any(|x| x == &1);
// `BinaryHeap` doesn't have `contains` method
sample.iter().count();
sample.iter().next().is_none();
}
|
