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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()`
|
LL - map["peter"].clear();
LL + if let Some(val) = map.get_mut("peter") { val.clear(); };
|
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: use `.insert()` to insert a value into a `HashMap<&str, String>`, `.get_mut()` to modify it, or the entry API for more flexibility
|
LL - map["peter"] = "0".to_string();
LL + map.insert("peter", "0".to_string());
|
LL - map["peter"] = "0".to_string();
LL + if let Some(val) = map.get_mut("peter") { *val = "0".to_string(); };
|
LL - map["peter"] = "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`.
|
