2 #![allow(unused_imports)]
6 clippy::mem_replace_option_with_none,
7 clippy::mem_replace_with_default
10 use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, LinkedList, VecDeque};
13 fn replace_option_with_none() {
14 let mut an_option = Some(1);
15 let _ = mem::replace(&mut an_option, None);
16 let an_option = &mut Some(1);
17 let _ = mem::replace(an_option, None);
20 fn replace_with_default() {
21 let mut s = String::from("foo");
22 let _ = std::mem::replace(&mut s, String::default());
24 let s = &mut String::from("foo");
25 let _ = std::mem::replace(s, String::default());
26 let _ = std::mem::replace(s, Default::default());
28 let mut v = vec![123];
29 let _ = std::mem::replace(&mut v, Vec::default());
30 let _ = std::mem::replace(&mut v, Default::default());
31 let _ = std::mem::replace(&mut v, Vec::new());
32 let _ = std::mem::replace(&mut v, vec![]);
34 let mut hash_map: HashMap<i32, i32> = HashMap::new();
35 let _ = std::mem::replace(&mut hash_map, HashMap::new());
37 let mut btree_map: BTreeMap<i32, i32> = BTreeMap::new();
38 let _ = std::mem::replace(&mut btree_map, BTreeMap::new());
40 let mut vd: VecDeque<i32> = VecDeque::new();
41 let _ = std::mem::replace(&mut vd, VecDeque::new());
43 let mut hash_set: HashSet<&str> = HashSet::new();
44 let _ = std::mem::replace(&mut hash_set, HashSet::new());
46 let mut btree_set: BTreeSet<&str> = BTreeSet::new();
47 let _ = std::mem::replace(&mut btree_set, BTreeSet::new());
49 let mut list: LinkedList<i32> = LinkedList::new();
50 let _ = std::mem::replace(&mut list, LinkedList::new());
52 let mut binary_heap: BinaryHeap<i32> = BinaryHeap::new();
53 let _ = std::mem::replace(&mut binary_heap, BinaryHeap::new());
57 replace_option_with_none();
58 replace_with_default();