/// <summary>
/// Try for another solution, asking parent for new solution if necessary.
/// </summary>
/// <returns>Success</returns>
public override bool TryNext()
{
if (index == -1 && !parent.TryNext())
{
return(false); // Parent didn't have any solutions
}
index++;
while (index == parent.Current.Children.Count)
{
// We've exhaused parent's Current children; ask parent for another solution
index = 0;
if (!parent.TryNext())
{
// Parent is depleted
return(false);
}
}
// Got one.
Current = parent.Current.Children[index];
variable.Value = Current.Key;
return(true);
}
/// <summary>
/// Attempts to find the next solution
/// </summary>
/// <returns>Success</returns>
public override bool TryNext()
{
if (!done)
{
while (parent.TryNext())
{
foreach (var c in parent.Current.Children)
{
if (c.Key.Equals(key))
{
Current = c;
return(true);
}
}
}
done = true;
}
return(false);
}