/// <summary> <!-- {{{1 --> Throw exception when specified different cell index.
/// </summary>
/// <param name="self"></param>
/// <param name="tgt"></param>
public static void AssertWhenIndexNotEquals(this SudokuCellIndex self, SudokuCellIndex tgt)
{
if (!self.IsEquals(tgt))
{
var msg = string.Format("Different cell index: {0} != {1}", self.ToStr(), tgt.ToStr());
throw new InvalidEnumArgumentException(msg);
}
}
/// <summary> <!-- {{{1 --> Throw exception when specified index is invalid.
/// </summary>
/// <param name="self"></param>
public static void AssertWhenInvalid(this SudokuCellIndex self)
{
if (self.IsInvalid())
{
var msg = string.Format("Invalid cell index: {0}", self.ToStr());
throw new ArgumentOutOfRangeException(msg);
}
}