Add assignment

Piece.hpp

@@ -0,0 +1,40 @@
+#ifndef CHESS_ENGINE_PIECE_HPP
+#define CHESS_ENGINE_PIECE_HPP
+
+#include <optional>
+#include <iosfwd>
+
+enum class PieceColor {
+    White,
+    Black
+};
+
+enum class PieceType {
+    Pawn,
+    Knight,
+    Bishop,
+    Rook,
+    Queen,
+    King
+};
+
+class Piece {
+public:
+
+    using Optional = std::optional<Piece>;
+
+    Piece(PieceColor color, PieceType type);
+
+    static Optional fromSymbol(char symbol);
+
+    PieceColor color() const;
+    PieceType type() const;
+};
+
+bool operator==(const Piece& lhs, const Piece& rhs);
+std::ostream& operator<<(std::ostream& os, const Piece& piece);
+
+// Invert a color (White becomes Black and vice versa)
+PieceColor operator!(PieceColor color);
+
+#endif