Implement IIncrementalGenerator

[devbased]

From dotnet/roslyn

Summary

Incremental generators are intended to be a new API that exists alongside source generators to allow users to specify generation strategies that can be applied in a high performance way by the hosting layer.

High Level Design Goals

Allow for a finer grained approach to defining a generator
Scale source generators to support 'Roslyn/CoreCLR' scale projects in Visual Studio
Exploit caching between fine grained steps to reduce duplicate work
Support generating more items that just source texts
Exist alongside ISourceGenerator based implementations

[canton7]

Incremental SGs don't support the sort of analysis that we do. See dotnet/roslyn#60273.

When incremental SGs were introduced, they were marketed as being useful for Roslyn-scale codebase. Now they've become a bit of a fad. Do you have a performance problem with PropertyChanged.SourceGenerator which an incremental SG would solve?

[devbased]

Oh, I see that you are aware of IIncrementalGenerator.
I thought it should be used by default and didn't know it has such issues, thats interesting...

Thank you for your response!