rust-clippy/tests/ui/needless_collect.rs

22 lines
728 B
Rust
Raw Normal View History

// run-rustfix
2021-02-25 14:07:15 +00:00
#![allow(unused, clippy::suspicious_map, clippy::iter_count)]
2018-12-09 22:26:16 +00:00
use std::collections::{BTreeSet, HashMap, HashSet};
2018-08-31 22:14:33 +00:00
2018-09-04 03:50:24 +00:00
#[warn(clippy::needless_collect)]
2020-08-08 16:13:43 +00:00
#[allow(unused_variables, clippy::iter_cloned_collect, clippy::iter_next_slice)]
fn main() {
let sample = [1; 5];
let len = sample.iter().collect::<Vec<_>>().len();
if sample.iter().collect::<Vec<_>>().is_empty() {
// Empty
}
sample.iter().cloned().collect::<Vec<_>>().contains(&1);
2018-08-31 22:14:33 +00:00
sample.iter().map(|x| (x, x)).collect::<HashMap<_, _>>().len();
// Notice the `HashSet`--this should not be linted
sample.iter().collect::<HashSet<_>>().len();
// Neither should this
sample.iter().collect::<BTreeSet<_>>().len();
}