mars-rover-fe

commit d2f123bcf62239ee6d2ed6528b1671ce7e86ba8a
parent 023923f06b13a15d61a807eda7d82632b444a309
Author: Daniel Barlow <dan@telent.net>
Date:   Fri,  3 Nov 2023 18:41:40 +0000

make Rover a struct instead of a raw tuple

Diffstat:
M
src/main.rs
 | 
59
++++++++++++++++++++++++++++++++---------------------------

1 file changed, 32 insertions(+), 27 deletions(-)
diff --git a/src/main.rs b/src/main.rs
@@ -8,7 +8,8 @@ mod rover {
     #[derive(Debug, PartialEq, Copy, Clone)]
     pub enum Rotation { Left, Right }
 
-    pub type Rover = (i32, i32, Facing);
+    #[derive(Debug, PartialEq, Copy, Clone)]
+    pub struct Rover(pub i32, pub i32, pub Facing);
 
     fn velocity(direction : &Facing) -> (i32, i32) {
 	match direction {
@@ -19,14 +20,16 @@ mod rover {
 	}
     }
 
-    pub fn forward((lon, lat, direction) : &Rover) -> Rover {
+    pub fn forward(slf : &Rover) -> Rover {
+	let Rover(lon, lat, direction) = slf;
 	let (xoff, yoff) = velocity(&direction);
-	(lon + xoff as i32, lat + yoff as i32, *direction)
+	Rover(lon + xoff as i32, lat + yoff as i32, *direction)
     }
 
-    pub fn backward((lon, lat, direction) : &Rover) -> Rover {
+    pub fn backward(slf : &Rover) -> Rover {
+	let Rover(lon, lat, direction) = slf;
 	let (xoff, yoff) = velocity(&direction);
-	(lon - xoff as i32, lat - yoff as i32, *direction)
+	Rover(lon - xoff as i32, lat - yoff as i32, *direction)
     }
 
     fn next_direction(direction : Facing) -> Facing {
@@ -36,19 +39,21 @@ mod rover {
 	    Facing::S => Facing::E,
 	    Facing::E => Facing::N,
 	}
+
     }
 
-    pub fn rotate((lon, lat, direction) : &Rover, rotation: Rotation) -> Rover {
+    pub fn rotate(slf : &Rover, rotation: Rotation) -> Rover {
+	let Rover(lon, lat, direction) = slf;
 	match rotation {
 	    Rotation::Left => {
 		let new_d = next_direction(*direction);
-		(*lon, *lat, new_d)
+		Rover(*lon, *lat, new_d)
 	    },
 	    Rotation::Right => {
 		let new_d = next_direction(*direction);
 		let new_d = next_direction(new_d);
 		let new_d = next_direction(new_d);
-		(*lon, *lat, new_d)
+		Rover(*lon, *lat, new_d)
 	    }
 	}
     }
@@ -80,67 +85,67 @@ mod driver {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
+    use super::{rover, driver};
+    use super::rover::{Rover};
 
     #[test]
     fn move_north() {
-	let r = (1 as i32, 1 as i32, rover::Facing::N);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::N);
 	assert_eq!(rover::forward(&r),
-		   (1 as i32, 0 as i32, rover::Facing::N));
+		    Rover(1 as i32, 0 as i32, rover::Facing::N));
 
-	let r = (1 as i32, 3 as i32, rover::Facing::N);
+	let r =  Rover(1 as i32, 3 as i32, rover::Facing::N);
 	assert_eq!(rover::forward(&r),
-		   (1 as i32, 2 as i32, rover::Facing::N));
+		   Rover(1 as i32, 2 as i32, rover::Facing::N));
     }
 
     #[test]
     fn move_south() {
-	let r = (1 as i32, 1 as i32, rover::Facing::S);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::S);
 	assert_eq!(rover::forward(&r),
-		   (1 as i32, 2 as i32, rover::Facing::S));
+		   Rover(1 as i32, 2 as i32, rover::Facing::S));
     }
 
     #[test]
     fn move_west() {
-	let r = (1 as i32, 1 as i32, rover::Facing::W);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::W);
 	assert_eq!(rover::forward(&r),
-		   (0 as i32, 1 as i32, rover::Facing::W));
+		   Rover(0 as i32, 1 as i32, rover::Facing::W));
     }
 
     #[test]
     fn move_east() {
-	let r = (1 as i32, 1 as i32, rover::Facing::E);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::E);
 	assert_eq!(rover::forward(&r),
-		   (2 as i32, 1 as i32, rover::Facing::E));
+		   Rover(2 as i32, 1 as i32, rover::Facing::E));
     }
 
     #[test]
     fn move_backward() {
-	let r = (1 as i32, 1 as i32, rover::Facing::E);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::E);
 	let r2 = rover::forward(&r);
 	assert_eq!(rover::backward(&r2), r);
     }
 
     #[test]
     fn spin_left() {
-	let r = (1 as i32, 1 as i32, rover::Facing::E);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::E);
 	match rover::rotate(&r, rover::Rotation::Left) {
-	    (_, _, facing) => assert_eq!(facing, rover::Facing::N)
+	    Rover(_, _, facing) => assert_eq!(facing, rover::Facing::N)
 	}
     }
     #[test]
     fn spin_right() {
-	let r = (1 as i32, 1 as i32, rover::Facing::S);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::S);
 	match rover::rotate(&r, rover::Rotation::Right) {
-	    (_, _, facing) => assert_eq!(facing, rover::Facing::W)
+	    Rover(_, _, facing) => assert_eq!(facing, rover::Facing::W)
 	}
     }
 
     #[test]
     fn drive() {
-	let r = (1 as i32, 1 as i32, rover::Facing::S);
+	let r = Rover(1 as i32, 1 as i32, rover::Facing::S);
 	assert_eq!(driver::execute(&r, "ffrf"),
-		   (0 as i32, 3 as i32, rover::Facing::W));
+		   Rover(0 as i32, 3 as i32, rover::Facing::W));
     }
-
 }