/// <summary>
/// move to last element in IDoubleLinkedList
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="current"></param>
/// <returns></returns>
public static IReversibleEnumerator <T> FastForwardToEnd <T>(this IReversibleEnumerator <T> current)
{
while (current.MoveNext())
{
;
}
return(current);
}
public ReversibleEnumeratorBoundariesDecorator(
IReversibleEnumerator <TPayload> unbounded,
Predicate <TPayload> isLowerBoundary,
Predicate <TPayload> isUpperBoundary)
{
_unbounded = unbounded;
_isUpperBoundary = isUpperBoundary;
_isLowerBoundary = isLowerBoundary;
Current = default;
}
/// <inheritdoc />
public bool MovePrevious()
{
if (_inner is null)
{
_inner = new ReversibleEnumeratorBoundariesDecorator <TPayload>(
new LinkReversibleEnumerator <TPayload>(_segment.End),
IsLowerBoundary,
IsUpperBoundary);
}
return(_inner.MovePrevious());
}
/// <inheritdoc />
public void Reset()
{
_inner?.Dispose();
_inner = null;
}
/// <summary>
/// try moving to realative position
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="current"></param>
/// <param name="count"></param>
/// <returns></returns>
public static IReversibleEnumerator <T> Offset <T>(this IReversibleEnumerator <T> current, int count) =>
count switch
{
/// <summary>
/// move to last element in cache
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="current"></param>
/// <returns></returns>
public static IReversibleEnumerator <T> FastForward <T>(this IReversibleEnumerator <T> current)
{
current.MoveCurrent();
return(current);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="current"></param>
/// <returns></returns>
public static IReversibleEnumerator <T> Rewind <T>(this IReversibleEnumerator <T> current)
{
current.Reset();
return(current);
}