How to zip two IncrementalValuesProviders?

[n9]

Currently, there is IncrementalValueProviderExtensions.Combine that combines either two IncrementalValueProviders or one IncrementalValuesProvider with one IncrementalValueProvider. I need to zip two IncrementalValuesProviders into a new one by a key.

My use case:

I need to generate a partial class from two sources:

• a user-provided interface (which the generated partial class will implement)
• a user-provided partial class (which the generator will also use while generating the generated partial class)

Result:

The partial class is generated if either the user-provided interface or the user-provided partial class is present, or both.

The "zipping" key in my case is the name of the generated partial class.

Question:

How to currently achieve this (in a least cache-unfriendly way)?

[333fred]

If you need to search among all values in a provider for a key, then I don't think there's a cache-friendly way to achieve it. You'll have to Combine and then pull back out via SelectMany.

[n9]

I currently use two different incremental generators (one for the interface and the other for the partial class). The problem is with a shared state. I am considering creating a shared state with a third one.