41 lines
1.3 KiB
Nim
41 lines
1.3 KiB
Nim
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## Handling of moves
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import pieces
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type
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MoveFlag* = enum
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## An enumeration of move flags
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Default = 0'u16, # No flag
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EnPassant = 1, # Move is a capture with en passant
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Capture = 2, # Move is a capture
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DoublePush = 4, # Move is a double pawn push
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# Castling metadata
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CastleLong = 8,
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CastleShort = 16,
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# Pawn promotion metadata
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PromoteToQueen = 32,
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PromoteToRook = 64,
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PromoteToBishop = 128,
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PromoteToKnight = 256
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Move* = object
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## A chess move
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startSquare*: Square
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targetSquare*: Square
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flags*: uint16
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func createMove*(startSquare, targetSquare: string, flags: seq[MoveFlag] = @[]): Move =
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result = Move(startSquare: startSquare.algebraicToSquare(),
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targetSquare: targetSquare.algebraicToSquare(), flags: Default.uint16)
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for flag in flags:
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result.flags = result.flags or flag.uint16
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func createMove*(startSquare, targetSquare: Square, flags: seq[MoveFlag] = @[]): Move =
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result = Move(startSquare: startSquare, targetSquare: targetSquare, flags: Default.uint16)
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for flag in flags:
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result.flags = result.flags or flag.uint16
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func nullMove*: Move {.inline.} = createMove(nullSquare(), nullSquare())
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