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127
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1 import std.stdio;
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2 import std.traits;
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128
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3 import std.range;
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4
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5 enum Color {
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6 White, Black
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7 }
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8
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9 Color invert(Color c) {
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10 return c == Color.White ? Color.Black : Color.White;
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11 }
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127
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12
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13 enum Piece {
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14 King, Queen, Rook, Bishop, Knight, Pawn
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15 }
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16
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17 string toString(Color color, Piece piece) {
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18 string[6][2] table =
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19 [
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20 [ "\u2654", "\u2655", "\u2656", "\u2657", "\u2658", "\u2659" ],
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21 [ "\u265A", "\u265B", "\u265C", "\u265D", "\u265E", "\u265F" ]
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22 ];
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23 return table[color][piece];
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24 }
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25
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26 struct Square {
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27 this(Color color_, Piece piece_) {
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28 occupied = true;
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29 color = color_;
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30 piece = piece_;
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31 }
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32
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33 bool occupied = false;
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34 Color color;
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35 Piece piece;
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36 }
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37
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38 enum File {
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39 _A, _B, _C, _D, _E, _F, _G, _H
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40 }
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41
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42 char toChar(File f) {
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43 char[8] table = [ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h' ];
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44 return table[f];
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45 }
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46
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127
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47 enum Rank {
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48 _1, _2, _3, _4, _5, _6, _7, _8
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49 }
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50
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51 char toChar(Rank r) {
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52 char[8] table = [ '1', '2', '3', '4', '5', '6', '7', '8' ];
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53 return table[r];
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54 }
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55
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56 struct Coord {
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57 File file;
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58 Rank rank;
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59 }
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60
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61 struct Move {
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62 Coord source;
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63 Coord dest;
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64 }
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65
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127
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66 struct Board {
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128
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67 this(Board board, Move move) {
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68 squares = board.squares;
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69 apply(move);
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70 }
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71
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72 Square square(Coord coord) const {
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73 return squares[coord.file][coord.rank];
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74 }
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75
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76 private:
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77 Square * square(Coord coord) {
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78 return &squares[coord.file][coord.rank];
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79 }
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80
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81 void apply(Move move) {
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82 auto sq1 = square(move.source);
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83 auto sq2 = square(move.dest);
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84
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85 if (sq1.piece == Piece.Pawn && move.dest.file != move.source.file) {
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86 // en-passant
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87 }
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88 else if (sq1.piece == Piece.King && move.dest.file - move.source.file > 1) {
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89 // castle
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90 }
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91 else {
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92 *sq2 = *sq1;
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93 sq1.occupied = false;
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94 }
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95 }
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96
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97 Square[8][8] squares =
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98 [
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99 [ Square(Color.White, Piece.Rook), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Rook) ],
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100 [ Square(Color.White, Piece.Knight), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Knight) ],
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101 [ Square(Color.White, Piece.Bishop), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Bishop) ],
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102 [ Square(Color.White, Piece.Queen), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Queen) ],
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103 [ Square(Color.White, Piece.King), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.King) ],
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104 [ Square(Color.White, Piece.Bishop), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Bishop) ],
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105 [ Square(Color.White, Piece.Knight), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Knight) ],
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106 [ Square(Color.White, Piece.Rook), Square(Color.White, Piece.Pawn), Square(), Square(), Square(), Square(), Square(Color.Black, Piece.Pawn), Square(Color.Black, Piece.Rook) ]
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107 ];
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108 }
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109
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110 void dump(in Board board) {
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111 Color color = Color.White;
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112
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113 foreach_reverse(r; EnumMembers!Rank) {
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114 write(toChar(r));
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115 foreach(f; EnumMembers!File) {
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128
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116
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117 if (color == Color.White) {
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118 write("\033[47m");
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127
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119 }
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120 else {
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121 write("\033[40m");
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122 }
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123
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124 Square square = board.square(Coord(f, r));
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125 if (square.occupied) {
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126 write(toString(square.color, square.piece));
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127
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127 }
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128 else {
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129 write(" ");
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130 }
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131
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132 color = invert(color);
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127
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133 }
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128
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134 writeln("\033[0m");
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135
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136 color = invert(color);
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127
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137 }
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138
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128
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139 write(" ");
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127
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140 foreach(f; EnumMembers!File) {
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128
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141 writef("%s", toChar(f));
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127
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142 }
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143 writeln("");
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144 }
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145
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146 void main(string[] args) {
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147 Board board;
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128
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148 dump(board);
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127
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149 }
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