[core] Implement Display for Score

core/src/score.rs

@@ -1,6 +1,9 @@
 // Eryn Wells <eryn@erynwells.me>
 
-use std::ops::{Add, AddAssign, Mul, Sub, SubAssign};
+use std::{
+    fmt,
+    ops::{Add, AddAssign, Mul, Neg, Sub, SubAssign},
+};
 
 pub(crate) type ScoreInner = i32;
 
@@ -69,3 +72,16 @@ impl From<ScoreInner> for Score {
         Score(value)
     }
 }
+
+impl fmt::Display for Score {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let value = self.0;
+        if *self == Self::MAX {
+            write!(f, "INF")
+        } else if *self == Self::MIN {
+            write!(f, "-INF")
+        } else {
+            write!(f, "{value}cp")
+        }
+    }
+}