BishBosh.StateProperty.Mutator

AUTHOR

Dr. Alistair Ward

DESCRIPTION

Permits a board to be mutated.

Type-classes

class Mutator mutator where

• An interface which may be implemented by data which can mutate the board.
• CAVEAT: doesn't validate requests, so Kings can be placed in check & Pawns can be placed behind their starting rank or unpromoted on their last rank.

Methods

defineCoordinates

Arguments

:: Maybe Piece

The optional piece to place (or remove if Nothing is specified).

-> Coordinates

The coordinates to define.

-> mutator

-> mutator

• Defines the specified coordinates, by either placing or removing a piece.
• CAVEAT: this function should only be used to construct custom scenarios, since pieces don't normally spring into existence.
• CAVEAT: this function isn't called during normal play.

movePiece

Arguments

:: Move

-> MoveType

-> Piece

The piece which moved, rather than the (ptentially promoted) one that arrived.

-> mutator

-> mutator

Move the specified piece, accounting for promotions & casualties.

Instances

Mutator MaybePieceByCoordinates

Defined in BishBosh.State.MaybePieceByCoordinates

Methods

defineCoordinates :: Maybe Piece -> Coordinates -> MaybePieceByCoordinates -> MaybePieceByCoordinates

movePiece :: Move -> MoveType -> Piece -> MaybePieceByCoordinates -> MaybePieceByCoordinates

Mutator CoordinatesByRankByLogicalColour

Defined in BishBosh.State.CoordinatesByRankByLogicalColour

Methods

defineCoordinates :: Maybe Piece -> Coordinates -> CoordinatesByRankByLogicalColour -> CoordinatesByRankByLogicalColour

movePiece :: Move -> MoveType -> Piece -> CoordinatesByRankByLogicalColour -> CoordinatesByRankByLogicalColour

Mutator Board

Defined in BishBosh.State.Board

Methods

defineCoordinates :: Maybe Piece -> Coordinates -> Board -> Board

movePiece :: Move -> MoveType -> Piece -> Board -> Board

Functions

Mutators

placePiece :: Mutator mutator => Piece -> Coordinates -> mutator -> mutator

• Place a piece at the specified coordinates.
• CAVEAT: any piece previously at the specified coordinates will be obliterated.

placeFirstPiece :: (Empty mutator, Mutator mutator) => Piece -> Coordinates -> mutator

Place the first piece.

placeAllPieces :: (Empty mutator, Mutator mutator) => [(Piece, Coordinates)] -> mutator

Place pieces from scratch.

removePiece :: Mutator mutator => Coordinates -> mutator -> mutator

Remove a piece from the board.