2019: Implement AddAssign trait for Point

Allow for the `+=` operator to be used to self-modify the Point struct.
ericvw · Apr 25, 2024 · 2c55891 · 2c55891
1 parent 3edce64
commit 2c55891
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/2019/src/bin/puzzle_03.rs b/2019/src/bin/puzzle_03.rs
@@ -49,7 +49,7 @@ fn trace_path(path: &Vec<Vector>) -> HashMap<Point, u32> {
         };
 
         for _ in 0..magnitude {
-            c = c + step;
+            c += step;
             len += 1;
             trace.entry(c).or_insert(len);
         }

diff --git a/2019/src/grid.rs b/2019/src/grid.rs
@@ -1,4 +1,5 @@
 use std::ops::Add;
+use std::ops::AddAssign;
 use std::ops::Sub;
 
 #[derive(Debug, Default, Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
@@ -24,6 +25,15 @@ impl Add for Point {
     }
 }
 
+impl AddAssign for Point {
+    fn add_assign(&mut self, other: Self) {
+        *self = Self {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
+    }
+}
+
 impl Sub for Point {
     type Output = Self;