advent_of_code 2022-9: setup

advent_of_code/Cargo.toml

@@ -381,3 +381,7 @@ path = "src/aoc2022/7.rs"
 [[bin]]
 name = "2022-8"
 path = "src/aoc2022/8.rs"
+
+[[bin]]
+name = "2022-9"
+path = "src/aoc2022/9.rs"

advent_of_code/src/aoc2022/9.rs

@@ -0,0 +1,50 @@
+use itertools::{Itertools, assert_equal};
+
+#[derive(Debug, Eq, PartialEq)]
+enum Direction {
+    Left,
+    Right,
+    Up,
+    Down,
+}
+
+#[derive(Debug, Eq, PartialEq)]
+struct Motion {
+  direction: Direction,
+  step: isize
+}
+
+fn parse_motion(text: &str) -> Motion {
+  let (dir, step) = text.split(" ").collect_tuple().unwrap();
+  let mut direction = Direction::Up;
+  match dir {
+    "L" => {
+      direction = Direction::Left;
+    },
+    "R" => {
+      direction = Direction::Right;
+    },
+    "U" => {
+      direction = Direction::Up;
+    },
+    "D" => {
+      direction = Direction::Down
+    },
+    _ => panic!("no exists")
+  }
+  Motion { direction, step: step.parse::<isize>().unwrap() }
+}
+
+#[test]
+fn test_parse_motion() {
+  assert_eq!(
+    parse_motion("R 50"),
+    Motion {
+      direction: Direction::Right,
+      step: 50
+    }
+  );
+}
+
+fn main() {
+}