blob: 34804b9ee5d77325b0d9e9d26db2409683d9b8b1 (
plain)
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
60
61
62
63
64
65
66
67
68
69
70
71
|
#![allow(unused, clippy::needless_pass_by_value, clippy::collapsible_if)]
#![warn(clippy::map_entry)]
use std::collections::{BTreeMap, HashMap};
use std::hash::Hash;
macro_rules! m {
($e:expr) => {{ $e }};
}
fn foo() {}
fn insert_if_absent0<K: Eq + Hash + Copy, V: Copy>(m: &mut HashMap<K, V>, k: K, v: V, v2: V) {
match m.entry(k) {
std::collections::hash_map::Entry::Vacant(e) => {
e.insert(v);
}
std::collections::hash_map::Entry::Occupied(mut e) => {
e.insert(v2);
}
}
match m.entry(k) {
std::collections::hash_map::Entry::Occupied(mut e) => {
e.insert(v);
}
std::collections::hash_map::Entry::Vacant(e) => {
e.insert(v2);
}
}
if let std::collections::hash_map::Entry::Vacant(e) = m.entry(k) {
e.insert(v);
} else {
foo();
}
if let std::collections::hash_map::Entry::Occupied(mut e) = m.entry(k) {
e.insert(v);
} else {
foo();
}
match m.entry(k) {
std::collections::hash_map::Entry::Vacant(e) => {
e.insert(v);
}
std::collections::hash_map::Entry::Occupied(mut e) => {
e.insert(v2);
}
}
match m.entry(k) {
std::collections::hash_map::Entry::Occupied(mut e) => {
if true { Some(e.insert(v)) } else { Some(e.insert(v2)) }
}
std::collections::hash_map::Entry::Vacant(e) => {
e.insert(v);
None
}
};
if let std::collections::hash_map::Entry::Occupied(mut e) = m.entry(k) {
foo();
Some(e.insert(v))
} else {
None
};
}
fn main() {}
|
