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Use inline move function for early returns

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This commit is contained in:
ekzyis 2024-09-26 01:08:11 +02:00
parent d6ffd8a57d
commit fddbd145f3
1 changed files with 30 additions and 27 deletions
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57
chess/board.go
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@ -312,39 +312,42 @@ func (b *Board) Move(move string) error {
// TODO: make sure king is not in check after move // TODO: make sure king is not in check after move
// ( this avoids moving into check and moving a piece that exposes the king to check e.g. pinned pieces ) // ( this avoids moving into check and moving a piece that exposes the king to check e.g. pinned pieces )
if len(move) == 2 { move_ := func() error {
err = b.movePawn(move, captureFrom) if len(move) == 2 {
} else if len(move) == 3 { return b.movePawn(move, captureFrom)
piece = move[0:1]
targetPosition = move[1:3]
// collision detection
if collisionPiece, err = b.getCollision(targetPosition); err != nil {
return fmt.Errorf("invalid move %s: %v", move, err)
} else if collisionPiece != nil {
return fmt.Errorf("invalid move %s: position %s blocked by %s", move, targetPosition, collisionPiece)
} }
switch strings.ToLower(piece) { if len(move) == 3 {
case "r": piece = move[0:1]
err = b.moveRook(targetPosition, false) targetPosition = move[1:3]
case "b":
err = b.moveBishop(targetPosition, false) // collision detection
case "n": if collisionPiece, err = b.getCollision(targetPosition); err != nil {
err = b.moveKnight(targetPosition) return fmt.Errorf("invalid move %s: %v", move, err)
case "q": } else if collisionPiece != nil {
err = b.moveQueen(targetPosition) return fmt.Errorf("invalid move %s: position %s blocked by %s", move, targetPosition, collisionPiece)
case "k": }
err = b.moveKing(targetPosition)
default: switch strings.ToLower(piece) {
err = fmt.Errorf("invalid move %s: %v", move, err) case "r":
return b.moveRook(targetPosition, false)
case "b":
return b.moveBishop(targetPosition, false)
case "n":
return b.moveKnight(targetPosition)
case "q":
return b.moveQueen(targetPosition)
case "k":
return b.moveKing(targetPosition)
default:
return fmt.Errorf("invalid move %s: %v", move, err)
}
} }
} else {
return fmt.Errorf("invalid move %s: %v", move, err) return fmt.Errorf("invalid move %s: %v", move, err)
} }
if err != nil { if err = move_(); err != nil {
return err return err
} }