Result Builder Virtual ASTs

In my adventure with the swift compiler something that caught my attention and desire to implement is Virtualized Abstract Syntax Trees (ASTs) in future directions of result builder.
I decided to try and I managed to successfully implement buildVirtualFor. So I was wondering if that's something still on the table and worth pursuing.

@John_McCall @Douglas_Gregor as the original authors do you have insight on this? Thanks!


I think now we’d probably want to do that by finding a way to make the builder invoke a macro.