| error[E0594]: cannot assign to data in an index of `HashMap<u32, u32>` |
| --> $DIR/hashmap-index-mut.rs:5:5 |
| | |
| LL | map[&0] = 1; |
| | ^^^^^^^^^^^ cannot assign |
| | |
| = help: trait `IndexMut` is required to modify indexed content, but it is not implemented for `HashMap<u32, u32>` |
| help: use `.insert()` to insert a value into a `HashMap<u32, u32>`, `.get_mut()` to modify it, or the entry API for more flexibility |
| | |
| LL - map[&0] = 1; |
| LL + map.insert(&0, 1); |
| | |
| LL - map[&0] = 1; |
| LL + if let Some(val) = map.get_mut(&0) { *val = 1; }; |
| | |
| LL - map[&0] = 1; |
| LL + let val = map.entry(&0).or_insert(1); |
| | |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0594`. |
