/// <summary>
/// Narrows an enumerable to a segment. Boundaries are included.
/// </summary>
public static IReadonlyReversibleCollection <TPayload> Narrow <TPayload>(
this IReversibleEnumerable <TPayload> enumerable,
TPayload lowerBoundary,
TPayload higherBoundary) =>
new NarrowedReadonlyReversibleCollectionAdapter <TPayload>(
enumerable,
lowerBoundary,
higherBoundary);
public NarrowedReadonlyReversibleCollectionAdapter(
IReversibleEnumerable <TPayload> decorated,
TPayload lowerBoundary,
TPayload upperBoundary)
{
_decorated = decorated;
_isLowerBoundary = payload => lowerBoundary.Equals(payload);
_isUpperBoundary = payload => upperBoundary.Equals(payload);
}
