From c47f381a3bf32fdf3c3d5d33a43c364ee26a9f79 Mon Sep 17 00:00:00 2001
From: kageru <kageru@encode.moe>
Date: Tue, 21 Dec 2021 23:39:43 +0100
Subject: [PATCH] clippy

---
 2021/setup_day.sh     | 6 +++---
 2021/src/bin/day12.rs | 2 +-
 2021/src/bin/day15.rs | 4 ++--
 2021/src/bin/day19.rs | 1 +
 2021/src/bin/day20.rs | 5 ++---
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/2021/setup_day.sh b/2021/setup_day.sh
index 97fc9d8..55e104d 100755
--- a/2021/setup_day.sh
+++ b/2021/setup_day.sh
@@ -11,15 +11,15 @@ const DAY: usize = '$today';
 type Parsed = Vec<usize>;
 
 fn parse_input(raw: &str) -> Parsed {
-    unimplemented!()
+    todo!()
 }
 
 fn part1(parsed: &Parsed) -> usize {
-    unimplemented!()
+    todo!()
 }
 
 fn part2(parsed: &Parsed) -> usize {
-    unimplemented!()
+    todo!()
 }
 
 fn main() {
diff --git a/2021/src/bin/day12.rs b/2021/src/bin/day12.rs
index a93e8fc..8068956 100644
--- a/2021/src/bin/day12.rs
+++ b/2021/src/bin/day12.rs
@@ -44,7 +44,7 @@ fn part2(parsed: &Parsed) -> usize {
     possible_paths(parsed, &Node::Start, &Vec::new(), true)
 }
 
-fn possible_paths<'a>(map: &'a Parsed, position: &'a Node<'a>, visited: &Vec<&'a Node<'a>>, small_cave_allowed: bool) -> usize {
+fn possible_paths<'a>(map: &'a Parsed, position: &'a Node<'a>, visited: &[&'a Node<'a>], small_cave_allowed: bool) -> usize {
     map.get(position)
         .unwrap()
         .iter()
diff --git a/2021/src/bin/day15.rs b/2021/src/bin/day15.rs
index 8643135..44456bd 100644
--- a/2021/src/bin/day15.rs
+++ b/2021/src/bin/day15.rs
@@ -35,8 +35,8 @@ fn part1(parsed: &Parsed, grid_size: usize) -> usize {
     }
 }
 
-fn part2(parsed: &Parsed) -> usize {
-    unimplemented!()
+fn part2(_parsed: &Parsed) -> usize {
+    todo!()
 }
 
 fn main() {
diff --git a/2021/src/bin/day19.rs b/2021/src/bin/day19.rs
index 2e08bf3..cd35d7c 100644
--- a/2021/src/bin/day19.rs
+++ b/2021/src/bin/day19.rs
@@ -1,3 +1,4 @@
+#![allow(unused)]
 #![feature(test)]
 extern crate test;
 use aoc2021::common::*;
diff --git a/2021/src/bin/day20.rs b/2021/src/bin/day20.rs
index 6d447a2..4342765 100644
--- a/2021/src/bin/day20.rs
+++ b/2021/src/bin/day20.rs
@@ -60,12 +60,11 @@ fn step(grid: HashGrid<Pixel, 2>, lookup: &[Pixel; 512], iteration: usize) -> Ha
 const OUTSIDE: [Pixel; 2] = [Pixel::Dark, Pixel::Bright];
 
 fn lookup_index(p: Position2D, grid: &HashGrid<Pixel, 2>, iteration: usize) -> usize {
-    let idx = neighbors_plus_self(p)
+    neighbors_plus_self(p)
         .into_iter()
         .rev()
         .map(|p| grid.get(&p).unwrap_or(&OUTSIDE[iteration & 1]) == &Pixel::Bright)
-        .fold(0, |acc, n| (acc << 1) | n as usize);
-    idx
+        .fold(0, |acc, n| (acc << 1) | n as usize)
 }
 
 fn step_times(grid: &HashGrid<Pixel, 2>, lookup: &[Pixel; 512], iterations: usize) -> usize {