Classifier.GetClassifiedSpans obsoletion leaves no alternative suitable for use with Script API

[PJB3005]

My game engine uses Roslyn's script API to implement a C# REPL. This works wonders and is an amazing tool. As part of this, I nicely syntax highlight the code submitted to the REPL. I am currently using Classifier.GetClassifiedSpans, however this was made obsolete in favor of an asynchronous method that takes a Document.

I would love to switch, but there is, as far as I can tell, no API I can use to get a Document from the Script API, thereby making it impossible to use this new (not obsolete) API.

I previously asked about this on the C# Discord and did get a reply by a Microsoft employee, but my question was not answered of "how to get a Document with Script". I dropped it back then but, well, now I'm looking into this again.

[vst121]

You’re not missing anything. There is no supported way to get a Document from the Script API.

Roslyn scripting does not integrate with Document/Workspace, and there is currently no official bridge between the two. For a REPL, either keep using the obsolete classifier or opt into an AdhocWorkspace if you want the newer async APIs.