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
|
error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
--> $DIR/index-mut-help.rs:10:5
|
LL | map["peter"].clear();
| ^^^^^^^^^^^^ cannot borrow as mutable
|
= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
= help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
error[E0594]: cannot assign to data in an index of `HashMap<&str, String>`
--> $DIR/index-mut-help.rs:11:5
|
LL | map["peter"] = "0".to_string();
| ^^^^^^^^^^^^ cannot assign
|
= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
|
LL | map.insert("peter", "0".to_string());
| ~~~~~~~~ ~ +
LL | map.get_mut("peter").map(|val| { *val = "0".to_string(); });
| ~~~~~~~~~ ~~~~~~~~~~~~~~~~~~ ++++
LL | let val = map.entry("peter").or_insert("0".to_string());
| +++++++++ ~~~~~~~ ~~~~~~~~~~~~ +
error[E0596]: cannot borrow data in an index of `HashMap<&str, String>` as mutable
--> $DIR/index-mut-help.rs:12:13
|
LL | let _ = &mut map["peter"];
| ^^^^^^^^^^^^^^^^^ cannot borrow as mutable
|
= help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<&str, String>`
= help: to modify a `HashMap<&str, String>`, use `.get_mut()`, `.insert()` or the entry API
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0594, E0596.
For more information about an error, try `rustc --explain E0594`.
|
