public static IAsyncResultEnumerable <TResult, TFailure> SelectMany <TSuccess, TFailure, TBind, TResult>(this IAsyncResultEnumerable <TSuccess, TFailure> source, Func <TSuccess, Task <IEnumerable <TBind> > > bind, Func <TSuccess, TBind, Task <TResult> > resultSelector)
{
if (bind == null)
{
throw new ArgumentNullException(nameof(bind));
}
if (resultSelector == null)
{
throw new ArgumentNullException(nameof(resultSelector));
}
return(source
.SelectMany(result => result
.Match(success =>
bind
.Invoke(success)
.AsAsyncEnumerable()
.SelectAsync(obj => resultSelector.Invoke(success, obj))
.Select(Result.Success <TResult, TFailure>),
failure => AsyncEnumerable.Repeat(Result.Failure <TResult, TFailure>(failure), 1)
)
)
.AsAsyncResultEnumerable());
}
public static IAsyncOptionEnumerable <TResult> SelectMany <TSuccess, TBind, TResult>(this IAsyncOptionEnumerable <TSuccess> source, Func <TSuccess, IAsyncEnumerable <TBind> > bind, Func <TSuccess, TBind, TResult> resultSelector)
where TSuccess : notnull
where TResult : notnull
{
if (bind == null)
{
throw new ArgumentNullException(nameof(bind));
}
if (resultSelector == null)
{
throw new ArgumentNullException(nameof(resultSelector));
}
return(source
.SelectMany(result => result
.Match(success =>
bind
.Invoke(success)
.Select(obj => resultSelector.Invoke(success, obj))
.Select(Option.Some),
() => AsyncEnumerable.Repeat(Option.None <TResult>(), 1)
)
)
.AsAsyncOptionEnumerable());
}
public static IAsyncResultEnumerable <TResult, TFailure> SelectMany <TSuccess, TFailure, TBind, TResult>(this Task <Result <TSuccess, TFailure> > source, Func <TSuccess, IAsyncEnumerable <TBind> > bind, Func <TSuccess, TBind, Task <TResult> > resultSelector) => AsyncEnumerable.Repeat(source, 1).AsAsyncResultEnumerable().SelectMany(bind, resultSelector);
public static IAsyncOptionEnumerable <TResult> SelectMany <TSuccess, TBind, TResult>(this Task <Option <TSuccess> > source, Func <TSuccess, IAsyncEnumerable <TBind> > bind, Func <TSuccess, TBind, TResult> resultSelector)
where TSuccess : notnull
where TResult : notnull
=> AsyncEnumerable.Repeat(source, 1).AsAsyncOptionEnumerable().SelectMany(bind, resultSelector);