diff options
| -rw-r--r-- | 2022/rust/day07/src/main.rs | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/2022/rust/day07/src/main.rs b/2022/rust/day07/src/main.rs index 1ea8840..8ed8d24 100644 --- a/2022/rust/day07/src/main.rs +++ b/2022/rust/day07/src/main.rs @@ -2,7 +2,7 @@ use std::cell::{Cell, RefCell}; use std::cmp; use std::env; use std::fs; -use std::rc::Rc; +use std::rc::{Rc, Weak}; struct Directory { id: String, @@ -10,7 +10,7 @@ struct Directory { // mmm i'd rather have a plain Directory instead of Rc<Directory> // but i get "cannot move out of x which is behind a shared reference" children: RefCell<Vec<Rc<Directory>>>, - parent: Option<Rc<Directory>> + parent: Option<Weak<Directory>> } fn main() { @@ -33,7 +33,7 @@ fn main() { // println!("$ ls") }, ["$", "cd", ".."] => { - current = current.parent.clone().unwrap(); + current = current.parent.clone().unwrap().upgrade().unwrap(); // lmao // println!("$ cd .."); }, ["$", "cd", id] => { @@ -52,7 +52,7 @@ fn main() { id: String::from(id), size: Cell::from(0), children: RefCell::from(Vec::new()), - parent: Option::from(current.clone()) + parent: Option::from(Rc::downgrade(¤t)) })); // println!("dir {}", id) }, |