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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// run-rustfix
#![allow(unused_imports)]
#![warn(
clippy::all,
clippy::style,
clippy::mem_replace_option_with_none,
clippy::mem_replace_with_default
)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, LinkedList, VecDeque};
use std::mem;
fn replace_option_with_none() {
let mut an_option = Some(1);
let _ = mem::replace(&mut an_option, None);
let an_option = &mut Some(1);
let _ = mem::replace(an_option, None);
}
fn replace_with_default() {
let mut s = String::from("foo");
let _ = std::mem::replace(&mut s, String::default());
let s = &mut String::from("foo");
let _ = std::mem::replace(s, String::default());
let _ = std::mem::replace(s, Default::default());
let mut v = vec![123];
let _ = std::mem::replace(&mut v, Vec::default());
let _ = std::mem::replace(&mut v, Default::default());
let _ = std::mem::replace(&mut v, Vec::new());
let _ = std::mem::replace(&mut v, vec![]);
let mut hash_map: HashMap<i32, i32> = HashMap::new();
let _ = std::mem::replace(&mut hash_map, HashMap::new());
let mut btree_map: BTreeMap<i32, i32> = BTreeMap::new();
let _ = std::mem::replace(&mut btree_map, BTreeMap::new());
let mut vd: VecDeque<i32> = VecDeque::new();
let _ = std::mem::replace(&mut vd, VecDeque::new());
let mut hash_set: HashSet<&str> = HashSet::new();
let _ = std::mem::replace(&mut hash_set, HashSet::new());
let mut btree_set: BTreeSet<&str> = BTreeSet::new();
let _ = std::mem::replace(&mut btree_set, BTreeSet::new());
let mut list: LinkedList<i32> = LinkedList::new();
let _ = std::mem::replace(&mut list, LinkedList::new());
let mut binary_heap: BinaryHeap<i32> = BinaryHeap::new();
let _ = std::mem::replace(&mut binary_heap, BinaryHeap::new());
}
fn main() {
replace_option_with_none();
replace_with_default();
}
|
