public static Square ToSquare(this SquareWithWall sqww)
{
return((Square)(sqww.ToInt() & 0x1f));
}
/// <summary>
/// 盤内か。壁(盤外)だとfalseになる。
/// </summary>
/// <param name="sqww"></param>
/// <returns></returns>
public static bool IsOk(this SquareWithWall sqww)
{
return((sqww.ToInt() & (int)SquareWithWall.SQWW_BORROW_MASK) == 0);
}
