49 lines
1.0 KiB
Swift
49 lines
1.0 KiB
Swift
public enum Kind: String, CaseIterable {
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case Pawn, Knight, Bishop, Rook, Queen, King
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public var value: Int8 {
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switch self {
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case .Pawn: 1
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case .Bishop: 3
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case .Knight: 3
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case .Rook: 5
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case .Queen: 9
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case .King: -1
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}
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}
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public static subscript(_ c: Character) -> (Self, Color)? {
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let v = c.uppercased()
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guard v == "N" || (Self.allCases.contains { String($0.rawValue.first!) == v}) else {
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return nil
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}
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let kind: Self = switch v {
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case "P": .Pawn
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case "N": .Knight
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case "B": .Bishop
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case "R": .Rook
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case "Q": .Queen
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case "K": .King
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default: .Pawn
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}
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let color: Color = c.isUppercase ? .White : .Black
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return (kind, color)
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}
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}
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public protocol Piece {
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var color: Color { get }
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var unicodeRepresentation: String { get }
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var kind: Kind { get }
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var position: Square.Position { get }
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var pseudoLegalPositions: [Square.Position] { get }
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var legalPositions: [Square.Position] { get }
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func move(dst: Square.Position) -> Bool
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func isLegal(pos: Square.Position) -> Bool
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}
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