mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-09-20 14:41:58 +00:00
64 lines
2.1 KiB
Rust
64 lines
2.1 KiB
Rust
// will emits unused mut warnings after fixing
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#![allow(unused_mut)]
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// will emits needless collect warnings after fixing
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#![allow(clippy::needless_collect, clippy::drain_collect)]
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#![warn(clippy::iter_with_drain)]
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use std::collections::{BinaryHeap, HashMap, HashSet, VecDeque};
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fn full() {
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let mut a = vec!["aaa".to_string(), "bbb".to_string()];
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let mut a: BinaryHeap<_> = a.drain(..).collect();
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let mut a: HashSet<_> = a.drain().collect();
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let mut a: VecDeque<_> = a.drain().collect();
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let mut a: Vec<_> = a.drain(..).collect();
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let mut a: HashMap<_, _> = a.drain(..).map(|x| (x.clone(), x)).collect();
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let _: Vec<(String, String)> = a.drain().collect();
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}
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fn closed() {
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let mut a = vec!["aaa".to_string(), "bbb".to_string()];
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let mut a: BinaryHeap<_> = a.drain(0..).collect();
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let mut a: HashSet<_> = a.drain().collect();
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let mut a: VecDeque<_> = a.drain().collect();
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let mut a: Vec<_> = a.drain(..a.len()).collect();
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let mut a: HashMap<_, _> = a.drain(0..a.len()).map(|x| (x.clone(), x)).collect();
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let _: Vec<(String, String)> = a.drain().collect();
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}
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fn should_not_help() {
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let mut a = vec!["aaa".to_string(), "bbb".to_string()];
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let mut a: BinaryHeap<_> = a.drain(1..).collect();
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let mut a: HashSet<_> = a.drain().collect();
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let mut a: VecDeque<_> = a.drain().collect();
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let mut a: Vec<_> = a.drain(..a.len() - 1).collect();
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let mut a: HashMap<_, _> = a.drain(1..a.len() - 1).map(|x| (x.clone(), x)).collect();
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let _: Vec<(String, String)> = a.drain().collect();
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let mut b = vec!["aaa".to_string(), "bbb".to_string()];
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let _: Vec<_> = b.drain(0..a.len()).collect();
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}
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fn _closed_range(mut x: Vec<String>) {
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let _: Vec<String> = x.drain(0..=x.len()).collect();
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}
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fn _with_mut(x: &mut Vec<String>, y: &mut VecDeque<String>) {
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let _: Vec<String> = x.drain(..).collect();
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let _: Vec<String> = y.drain(..).collect();
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}
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#[derive(Default)]
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struct Bomb {
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fire: Vec<u8>,
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}
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fn should_not_help_0(bomb: &mut Bomb) {
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let _: Vec<u8> = bomb.fire.drain(..).collect();
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}
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fn main() {
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full();
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closed();
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should_not_help();
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should_not_help_0(&mut Bomb::default());
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}
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