| // When mutably indexing a type that implements `Index` but not `IndexMut`, a | |
| // special 'help' message is added to the output. | |
| use std::collections::HashMap; | |
| fn main() { | |
| let mut map = HashMap::new(); | |
| map.insert("peter", "23".to_string()); | |
| map["peter"].clear(); //~ ERROR | |
| map["peter"] = "0".to_string(); //~ ERROR | |
| let _ = &mut map["peter"]; //~ ERROR | |
| } |