/// <summary>
/// Get the result of the previous action returning <see cref="Unit"/> and use it to create the next action.
/// </summary>
/// <typeparam name="TCurrentAction">The type of the current action</typeparam>
/// <typeparam name="TCurrentResult">The type of the current action result</typeparam>
/// <typeparam name="TAction">The type of the next action</typeparam>
/// <param name="source">The builder source</param>
/// <param name="nextAction">A function that creates the next action from the previous action result</param>
/// <returns>A new builder</returns>
public static IActionBuilderWithPreviousResult <TAction, Unit, TCurrentAction, TCurrentResult> Then <TCurrentAction, TCurrentResult, TAction>(
this IActionBuilderWithCurrentAction <TCurrentAction, TCurrentResult> source,
Func <ActionResult <TCurrentAction, TCurrentResult>, TAction> nextAction)
where TAction : class, IAction <Unit>
where TCurrentAction : class, IAction <TCurrentResult>
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (nextAction == null)
{
throw new ArgumentNullException(nameof(nextAction));
}
return(source.Then <TAction, Unit>(nextAction));
}
/// <summary>
/// Get the result of the previous action and use it to create the next action.
/// </summary>
/// <typeparam name="TCurrentAction">The type of the current action</typeparam>
/// <typeparam name="TCurrentResult">The type of the current action result</typeparam>
/// <typeparam name="TAction">The type of the next action</typeparam>
/// <typeparam name="TResult"></typeparam>
/// <param name="source">The builder source</param>
/// <param name="nextAction">A function that creates the next action from the previous action result</param>
/// <param name="dummy">An value used for infering the result type. This parameter is never used.</param>
/// <returns>A new builder</returns>
public static IActionBuilderWithPreviousResult <TAction, TResult, TCurrentAction, TCurrentResult> Then <TCurrentAction, TCurrentResult, TAction, TResult>(
this IActionBuilderWithCurrentAction <TCurrentAction, TCurrentResult> source,
Func <ActionResult <TCurrentAction, TCurrentResult>, TAction> nextAction,
#pragma warning disable RCS1163 // Used to inference
TResult dummy)
#pragma warning restore RCS1163 // Unused parameter.
where TAction : class, IAction <TResult>
where TCurrentAction : class, IAction <TCurrentResult>
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (nextAction == null)
{
throw new ArgumentNullException(nameof(nextAction));
}
return(source.Then <TAction, TResult>(nextAction));
}
public static object Then(
IActionBuilderWithCurrentAction <IAction <object>, object> source,
Func <ActionResult <IAction <object>, object>, IAction <int> > nextAction) => ActionBuilderExtensions.Then(source, nextAction, 0);