private IEnumerable <Definition.Element> Iterator(Definition.Sudoku sudoku, SudokuElementTravelType travelType)
{
IEnumerable <Definition.IElementCluster> clusters;
switch (travelType)
{
case SudokuElementTravelType.Grid:
clusters = sudoku.Grids;
break;
case SudokuElementTravelType.Row:
clusters = sudoku.Rows;
break;
case SudokuElementTravelType.Column:
clusters = sudoku.Columns;
break;
default: throw new NotImplementedException();
}
foreach (var cluster in clusters)
{
foreach (var element in cluster.Elements)
{
yield return(element);
}
}
}
public SudokuElementEnumerable(Definition.Sudoku sudoku, SudokuElementTravelType travelType)
{
if (sudoku == null)
{
throw new ArgumentNullException("sudoku");
}
this.sudoku = sudoku;
this.travelType = travelType;
}
