public static async Task ForEach <T>(this ITaskEnumerable <T> source, Action <T, ITaskForEachController> action)
{
if (source == null || action == null)
{
return;
}
var controller = new TaskForEachController();
using (var iterator = source.GetEnumerator())
{
while (iterator.MoveNext())
{
if (controller.CheckContinue())
{
continue;
}
var item = await iterator.Current;
action(await iterator.Current, controller);
if (controller.CheckBreak())
{
break;
}
}
}
}
public static ITaskEnumerable <T> Map <T>(this ITaskEnumerable <ITaskEnumerable <T> > source)
{
if (source == null)
{
return(Empty <T>());
}
return(new MappedTaskEnumerable <T>(source));
}
public static ITaskEnumerable <TResult> Continue <TSource, TResult>(this ITaskEnumerable <TSource> source, Func <Task <TSource>, Task <TResult> > continuation)
{
if (source == null || continuation == null)
{
return(Empty <TResult>());
}
return(new ContinueTaskEnumerable <TSource, TResult>(source, continuation));
}
public MappedTaskEnumerable(ITaskEnumerable <ITaskEnumerable <T> > source)
{
this.source = source ?? throw new ArgumentNullException(nameof(source));
}
public ContinueTaskEnumerable(ITaskEnumerable <TSource> source, Func <Task <TSource>, Task <TResult> > continuation)
{
this.source = source ?? throw new ArgumentNullException(nameof(source));
this.continuation = continuation ?? throw new ArgumentNullException(nameof(continuation));
}
