CodeFixProvider for diagnostics reported by IIncrementalGenerator

[GianvitoDifilippo]

I wrote a source generator that implements IIncrementalGenerator and can report diagnostics. Then, I wrote a CodeFixProvider for such diagnostics, but the code actions do not show up.
I think I followed all the steps for implementing the code fix provider because another one I wrote works fine for diagnostics reported by a DiagnosticAnalyzer.
Is this not supported or is there something I missed?
I am using Visual Studio 17.5.1 with Roslyn 4.0.1 - I also tried version 4.5.0 but nothing changed.

[CyrusNajmabadi]

I don't see anything that woudl make this work. @mavasani i would only expect that we call into DiagnosticAnalyzers to get the diagnostics that a code fix can fix. Correct?

[GianvitoDifilippo]

I'm in a situation where I need to gather contextual information from symbol analysis and then elaborate on these pieces of information both for generating source code and for reporting diagnostics, for which I wrote some code fixes.
I tried moving the analysis to a separate DiagnosticAnalyzer, but the diagnostic pipeline was composed of a Symbol action and a CompilationEnd action, which I have found it cannot run inside the IDE, let alone code fixing.
The workaround I'm using now is serializing the diagnostics produced by the generator to a generated file, which is then analyzed by a DiagnosticAnalyzer, which then reports the actual diagnostics. This works, but I find it a bit cumbersome and not the best for performance; better workarounds would be very welcomed :)

It would be very helpful if code fix providers could also fix generator-reported diagnostics.