From 7ad8268c9f9167dd28e34b703cf762308d7d6242 Mon Sep 17 00:00:00 2001
From: Martin HART <martin-hart@protonmail.com>
Date: Tue, 20 Oct 2020 15:15:56 +0200
Subject: [PATCH 1/4] Add queues to dependencies

---
 Cargo.toml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Cargo.toml b/Cargo.toml
index 863e846..740a020 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,4 @@ edition = "2018"
 
 [dependencies]
 clap = "2.33.3"
+queues = "1.1.0"

From 2dba5a97216024174e2bcda22cc8e856d9e6b813 Mon Sep 17 00:00:00 2001
From: Martin HART <martin-hart@protonmail.com>
Date: Tue, 20 Oct 2020 15:38:03 +0200
Subject: [PATCH 2/4] add queues to Robot

---
 src/main.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 54baa26..7076b93 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 use clap::{App, Arg};
+use queues::*;
 use std::fs;
 use std::io;
 
@@ -37,6 +38,7 @@ struct Robot {
     id: u32,
     o: Orientation,
     p: Position,
+    q: Queue<char>,
 }
 
 impl Robot {

From 569a6eaf94c141c0e50048ff2262664e3703b361 Mon Sep 17 00:00:00 2001
From: Martin HART <martin-hart@protonmail.com>
Date: Tue, 20 Oct 2020 16:00:26 +0200
Subject: [PATCH 3/4] Change to_ to turn_

---
 src/main.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 7076b93..3652955 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -70,19 +70,19 @@ impl Robot {
         }
     }
     /// Apply North orientation to the robot.
-    fn to_north(&mut self) {
+    fn turn_north(&mut self) {
         self.o = Orientation::N
     }
     /// Apply South orientation to the robot.
-    fn to_south(&mut self) {
+    fn turn_south(&mut self) {
         self.o = Orientation::S
     }
     /// Apply East orientation to the robot.
-    fn to_east(&mut self) {
+    fn turn_east(&mut self) {
         self.o = Orientation::E
     }
     /// Apply West orientation to the robot.
-    fn to_west(&mut self) {
+    fn turn_west(&mut self) {
         self.o = Orientation::W
     }
 }

From 67c292b9e233be71236befd99e9f1665317cb928 Mon Sep 17 00:00:00 2001
From: Martin HART <martin-hart@protonmail.com>
Date: Tue, 20 Oct 2020 16:57:51 +0200
Subject: [PATCH 4/4] Add empty_position()

---
 src/main.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 3652955..dd5a77a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -24,6 +24,10 @@ impl World {
             Orientation::W => '←',
         }
     }
+    /// Check if a position is free.
+    fn empty_position(&mut self, p: Position) -> bool {
+        self.map[(p.x * p.y) as usize] == '.'
+    }
 }
 
 /// Struct to store robot position.