/// <summary>
/// Creates a new <see cref="LazyDeltaPipelineStage{TInput, TOutput}"/> with the specified name, extractor and input.
/// </summary>
/// <param name="name">The name of this stage.</param>
/// <param name="extractor">The function used to extract a delta.</param>
/// <param name="input">The pipeline stage which to extract delta from.</param>
public LazyDeltaPipelineStage(
string name,
DeltaExtractor <TInput, TOutput> extractor,
IPipelineStage <TInput> input)
{
Name = name ?? throw new ArgumentNullException(nameof(name));
Extractor = extractor ?? throw new ArgumentNullException(nameof(extractor));
Input = input ?? throw new ArgumentNullException(nameof(input));
OldValue = input.GetValue();
CurrentDelta = default !;
/// <summary>
/// Creates a new <see cref="DeltaPipelineStage{TInput, TOutput}"/> with the specified name, extractor and input.
/// </summary>
/// <param name="name">The name of this stage.</param>
/// <param name="deltaExtractor">The function used to extract a delta.</param>
/// <param name="input">The pipeline stage which to extract delta from.</param>
/// <param name="initial">The initial delta value.</param>
public DeltaPipelineStage(
string name,
DeltaExtractor <TInput, TOutput> deltaExtractor,
IPipelineStage <TInput> input,
TOutput initial)
{
Name = name ?? throw new ArgumentNullException(nameof(name));
DeltaExtractor = deltaExtractor ?? throw new ArgumentNullException(nameof(deltaExtractor));
Input = input ?? throw new ArgumentNullException(nameof(input));
CurrentDelta = initial;
OldValue = input.GetValue();
this.AddDependencies(input);
}
