[board] Implement TryFrom<char> and Into<char> for piece::Shape

board/src/piece.rs

@@ -1,5 +1,7 @@
 // Eryn Wells <eryn@erynwells.me>
 
+use std::fmt;
+
 use crate::Square;
 
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -45,6 +47,49 @@ impl Shape {
     }
 }
 
+pub struct TryFromCharError;
+
+impl TryFrom<char> for Shape {
+    type Error = TryFromCharError;
+
+    fn try_from(value: char) -> Result<Self, Self::Error> {
+        match value {
+            'p' => Ok(Shape::Pawn),
+            'N' => Ok(Shape::Knight),
+            'B' => Ok(Shape::Bishop),
+            'R' => Ok(Shape::Rook),
+            'Q' => Ok(Shape::Queen),
+            'K' => Ok(Shape::King),
+            _ => Err(TryFromCharError),
+        }
+    }
+}
+
+impl Into<char> for &Shape {
+    fn into(self) -> char {
+        self.clone().into()
+    }
+}
+
+impl Into<char> for Shape {
+    fn into(self) -> char {
+        match self {
+            Shape::Pawn => 'p',
+            Shape::Knight => 'N',
+            Shape::Bishop => 'B',
+            Shape::Rook => 'R',
+            Shape::Queen => 'Q',
+            Shape::King => 'K',
+        }
+    }
+}
+
+impl fmt::Display for Shape {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
 #[derive(Debug, Eq, PartialEq)]
 pub enum PiecePlacementError {
     ExistsOnSquare,