#ifndef CHESS_ENGINE_SQUARE_HPP #define CHESS_ENGINE_SQUARE_HPP #include #include #include class Square { public: using Coordinate = unsigned; using Index = unsigned; using Optional = std::optional; static Optional fromCoordinates(Coordinate file, Coordinate rank); static Optional fromIndex(Index index); static Optional fromName(const std::string& name); Coordinate file() const; Coordinate rank() const; Index index() const; static const Square A1, B1, C1, D1, E1, F1, G1, H1; static const Square A2, B2, C2, D2, E2, F2, G2, H2; static const Square A3, B3, C3, D3, E3, F3, G3, H3; static const Square A4, B4, C4, D4, E4, F4, G4, H4; static const Square A5, B5, C5, D5, E5, F5, G5, H5; static const Square A6, B6, C6, D6, E6, F6, G6, H6; static const Square A7, B7, C7, D7, E7, F7, G7, H7; static const Square A8, B8, C8, D8, E8, F8, G8, H8; private: Square(Index index); }; std::ostream& operator<<(std::ostream& os, const Square& square); // Necessary to support Square as the key in std::map. bool operator<(const Square& lhs, const Square& rhs); bool operator==(const Square& lhs, const Square& rhs); #endif