From 16670f26a5f9d484300d2a232f6cf137a0836bab Mon Sep 17 00:00:00 2001
From: Stephen Waits <swaits@amazon.com>
Date: Sat, 12 Dec 2020 06:22:43 -0800
Subject: [PATCH] condense day 12 by combining pattern match arms

Signed-off-by: Stephen Waits <swaits@amazon.com>
---
 src/day12.rs | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/src/day12.rs b/src/day12.rs
index ccf5100..49a2852 100644
--- a/src/day12.rs
+++ b/src/day12.rs
@@ -45,34 +45,19 @@ fn navigate2(data: &str) -> usize {
             "S" => wpt_n -= dist,
             "E" => wpt_e += dist,
             "W" => wpt_e -= dist,
-            "L" => match dist {
-                270 => {
-                    wpt_e = -wpt_e;
-                    mem::swap(&mut wpt_n, &mut wpt_e);
-                }
-                180 => {
-                    wpt_n = -wpt_n;
-                    wpt_e = -wpt_e;
-                }
-                90 => {
+            "L" | "R" => match (dir, dist) {
+                ("L", 90) | ("R", 270) => {
                     wpt_n = -wpt_n;
                     mem::swap(&mut wpt_n, &mut wpt_e);
                 }
-                _ => panic!("bad direction!"),
-            },
-            "R" => match dist {
-                90 => {
+                ("L", 270) | ("R", 90) => {
                     wpt_e = -wpt_e;
                     mem::swap(&mut wpt_n, &mut wpt_e);
                 }
-                180 => {
+                (_, 180) => {
                     wpt_n = -wpt_n;
                     wpt_e = -wpt_e;
                 }
-                270 => {
-                    wpt_n = -wpt_n;
-                    mem::swap(&mut wpt_n, &mut wpt_e);
-                }
                 _ => panic!("bad direction!"),
             },
             "F" => {