IAsyncEnumerable - Any support for this? I don't see any mention of IAsyncEnumerable in this repository at all

[jeffward01]

Hey all,

I wanted to check and see if IAs is supported. I see in language-ext they are doing this:

The netstandard2.1 release supports IAsyncEnumerable<A> for OptionAsync<A> and EitherAsync<A>. This is the first baby-step towards leveraging some of the newer features of C# and .NET Core. - Source

That would equate to something like ResultAsync<T,E> in CSharpFunctionalExtensions - if it was a one-for-one comparison.

Question

How should I return a IAsyncEnumerable from a method?

Most of my methods return Result<Maybe<T>,E>> or Result<T,E> - using this pattern, what do you suggest?

[vkhorikov]

No, there's no support for IAsyncEnumerable or similar. As far as I understand, that's for IO/out-of-process dependencies, which this library doesn't work with.

I don't see the need for ResultAsync either because all extension methods (sync or async) work with the Result class itself.

Since IAsyncEnumerable should be the upper-most monad, you'd have to do something line IAsyncEnumerable<Maybe<T>>. This doesn't really work well, so I'd recommend to first process the IAsyncEnumerable and then convert the whatever result to Maybe or Result.

[jeffward01]

This makes alot of sense, thanks! I was having some complications processing IEnumerable regarding using a yield within an iterator. Because my return type was Result<IEnumerable<TEntit>, Error> I struggled to use yield at all - , so I did not touch the `IAsynEnumerable.

Thanks for this