try number who knows for day07.

src/day07/file_tree.rs

@@ -1,82 +1,20 @@
 use std::{
     cell::RefCell,
-    collections::{hash_map, HashMap},
     ops::Deref,
     rc::{Rc, Weak},
 };
 
-pub type WeakDirRef = Weak<RefCell<Dir>>;
+use thiserror::Error;
 
-pub trait FileLike {
-    fn get_parent(&self) -> Option<DirRef>;
-    fn get_name(&self) -> String;
+#[derive(Error, Debug)]
+pub enum FileTreeError {
+    #[error("Directory operation on file")]
+    IsFile,
+    #[error("File operation on directory")]
+    IsDir,
 }
 
-#[derive(Debug)]
-pub struct DirRef(Rc<RefCell<Dir>>);
-
-impl Deref for DirRef {
-    type Target = Rc<RefCell<Dir>>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl DirRef {
-    pub fn add_child_node(&mut self, mut node: Node) -> NodeRef {
-        node.change_parent(self);
-        let node_ref = NodeRef(Rc::new(RefCell::new(node)));
-        Rc::clone(self)
-            .borrow_mut()
-            .children
-            .push(NodeRef(Rc::clone(&node_ref)));
-        node_ref
-    }
-
-    pub fn add_child_dir(&mut self, mut dir: Dir) -> DirRef {
-        dir.parent = Some(Rc::downgrade(self));
-        let dir_ref = DirRef(Rc::new(RefCell::new(dir)));
-        Rc::clone(self).borrow_mut().children.push(
-            Node::Dir(())
-        );
-        todo!()
-    }
-}
-
-#[derive(Debug)]
-pub struct Dir {
-    name: String,
-    parent: Option<WeakDirRef>,
-    children: Vec<NodeRef>,
-}
-
-impl Dir {
-    pub fn get_total_size(&self) -> usize {
-        self.children
-            .iter()
-            .map(|n| -> usize {
-                match Rc::clone(n).borrow().deref() {
-                    Node::Dir(d) => d.get_total_size(),
-                    Node::File(f) => f.size,
-                }
-            })
-            .sum()
-    }
-
-    pub fn get_children(&self) -> impl Iterator<Item = NodeRef> + '_ {
-        self.children.iter().map(|n| NodeRef(Rc::clone(n)))
-    }
-}
-
-impl FileLike for Dir {
-    fn get_parent(&self) -> Option<DirRef> {
-        Some(DirRef(self.parent.as_ref()?.upgrade()?))
-    }
-    fn get_name(&self) -> String {
-        self.name.clone()
-    }
-}
+type WeakNodeRef = Weak<RefCell<Node>>;
 
 #[derive(Debug)]
 pub struct NodeRef(Rc<RefCell<Node>>);
@@ -89,48 +27,60 @@ impl Deref for NodeRef {
     }
 }
 
+impl From<Rc<RefCell<Node>>> for NodeRef {
+    fn from(value: Rc<RefCell<Node>>) -> Self {
+        NodeRef(value)
+    }
+}
+
+impl From<NodeRef> for Rc<RefCell<Node>> {
+    fn from(value: NodeRef) -> Self {
+        value.0
+    }
+}
+
 #[derive(Debug)]
-pub enum Node {
-    Dir(Dir),
-    File(File),
+pub struct Node {
+    pub name: String,
+    parent: Option<WeakNodeRef>,
+    contents: Contents,
 }
 
 impl Node {
-    fn change_parent(&mut self, new_parent: &DirRef) {
-        match self {
-            Node::Dir(d) => d.parent = Some(Rc::downgrade(new_parent)),
-            Node::File(f) => f.parent = Rc::downgrade(new_parent),
+    fn set_parent(&mut self, newparent: &NodeRef) {
+        self.parent = Some(Rc::downgrade(newparent));
+    }
+    pub fn get_parent(&self) -> Option<NodeRef> {
+        match &self.parent{
+            Some(w) => Some(NodeRef(w.clone().upgrade()?)),
+            None => None,
         }
     }
-}
-
-impl FileLike for Node {
-    fn get_parent(&self) -> Option<DirRef> {
-        match self {
-            Node::Dir(d) => d.get_parent(),
-            Node::File(f) => f.get_parent(),
+    pub fn get_size(&self) -> Result<usize, FileTreeError> {
+        match self.contents {
+            Contents::Size(s) => Ok(s),
+            Contents::Children(_) => Err(FileTreeError::IsDir),
         }
     }
-    fn get_name(&self) -> String {
-        match self {
-            Node::Dir(d) => d.get_name(),
-            Node::File(f) => f.get_name(),
+    pub fn set_size(&mut self, size: usize) -> Result<(), FileTreeError> {
+        match self.contents {
+            Contents::Size(ref mut s) => {
+                *s = size;
+                Ok(())
+            }
+            Contents::Children(_) => Err(FileTreeError::IsDir),
+        }
+    }
+    pub fn get_children(&self) -> Result<impl Iterator<Item = NodeRef> + '_, FileTreeError> {
+        match &self.contents {
+            Contents::Size(_) => Err(FileTreeError::IsFile),
+            Contents::Children(c) => Ok(c.iter().map(|n| NodeRef(Rc::clone(n)))),
         }
     }
 }
 
 #[derive(Debug)]
-pub struct File {
-    name: String,
-    parent: WeakDirRef,
-    pub size: usize,
-}
-
-impl FileLike for File {
-    fn get_parent(&self) -> Option<DirRef> {
-        Some(DirRef(self.parent.upgrade()?))
-    }
-    fn get_name(&self) -> String {
-        self.name.clone()
-    }
+pub enum Contents {
+    Size(usize),
+    Children(Vec<NodeRef>),
 }

src/day07/parser.rs

@@ -73,11 +73,11 @@ fn parse_ls(lines: &mut std::iter::Peekable<std::str::Lines<'_>>) -> Vec<LsEntry
     ret
 }
 
-pub fn parse(input: &str) -> Dir {
+pub fn parse(input: &str) -> Node {
     unimplemented!()
 }
 
-pub fn commands_to_tree(input: Vec<Command>) -> Dir {
+pub fn commands_to_tree(input: Vec<Command>) -> Node {
     unimplemented!()
 }
 

src/day07/solve.rs

@@ -1,4 +1,4 @@
-#![allow(unused)]
+#![allow(dead_code)]
 mod part1;
 mod part2;
 mod parser;

src/template/solve.rs

@@ -1,4 +1,4 @@
-#![allow(unused)]
+#![allow(dead_code)]
 mod part1;
 mod part2;
 mod utilities;