| error[E0594]: cannot assign to `self.how_hungry`, which is behind a `&` reference | |
| --> $DIR/mutable-class-fields-2.rs:9:5 | |
| | | |
| LL | self.how_hungry -= 5; | |
| | ^^^^^^^^^^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be written | |
| | | |
| help: consider changing this to be a mutable reference | |
| | | |
| LL | pub fn eat(&mut self) { | |
| | +++ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0594`. |