public static IAsyncResultEnumerable <TResult, TFailure> SelectMany <TSuccess, TFailure, TBind, TResult>(this IAsyncResultEnumerable <TSuccess, TFailure> source, Func <TSuccess, Task <Result <TBind, TFailure> > > bind, Func <TSuccess, TBind, Task <TResult> > resultSelector) where TSuccess : notnull where TFailure : notnull where TBind : notnull where TResult : notnull { if (bind == null) { throw new ArgumentNullException(nameof(bind)); } if (resultSelector == null) { throw new ArgumentNullException(nameof(resultSelector)); } return(source .SelectAsync(result => result .MatchAsync(success => bind .Invoke(success) .MapAsync(value => resultSelector.Invoke(success, value)), failure => Task.FromResult(Result.Failure <TResult, TFailure>(failure)) ) ) .AsAsyncResultEnumerable()); }
public static IAsyncResultEnumerable <TSuccess, TFailure> Where <TSuccess, TFailure>(this IAsyncResultEnumerable <TSuccess, TFailure> source, Func <TSuccess, Task <Result <Unit, TFailure> > > failurePredicate) => source .SelectAsync(value => value .BindAsync(success => failurePredicate .Invoke(success) .Select(_ => success) ) ) .AsAsyncResultEnumerable();
public static IAsyncResultEnumerable<TResult, TFailure> Select<TSuccess, TResult, TFailure>(this IAsyncResultEnumerable<TSuccess, TFailure> source, Func<TSuccess, Task<TResult>> selector) { if (selector == null) throw new ArgumentNullException(nameof(selector)); return source .SelectAsync(result => result .MatchAsync( success => Result.Success<TResult, TFailure>(selector.Invoke(success)), failure => Task.FromResult(Result.Failure<TResult, TFailure>(failure)) ) ) .AsAsyncResultEnumerable(); }