Hi, how do I convert `FirFunctionSymbol` to `IrFunctionSymbol` , `FirClassSymbol` to `IrClassSymbol`...

# compiler

[Manuel Wrage]

Hi, how do I convert FirFunctionSymbol to IrFunctionSymbol , FirClassSymbol to IrClassSymbol and so on?

[dmitriy.novozhilov]

It is quite complex process, implemented in fir2ir subsystem, and it's not exposed to plugin API

What exactly do you want to do?

[Manuel Wrage]

I try to convert my compiler plugin from k1 to k2.
I used DescriptorBasedReferenceSymbolTableExtension to convert the descriptor's I collected in frontend to their IR representations in the backend.

[dmitriy.novozhilov]

If you need to map declarations, generated by your own using FirDeclarationGenerationExtension, you can use FirDeclarationOrigin.Plugin and IrDeclarationOrigin.GeneratedByPlugin (GeneratedDeclarationKey passed to first transfers to the second)

For other declarations there is no simple solution
Classes can be mapped by classId
Other declarations should be mapped by signatures manually

[Manuel Wrage]

I only map other declarations.

Is there a good way to compare fir and ir signatures?

Also how do I map ConeKotlinType to IrType?

[Manuel Wrage]

I saw that I can reference IrElement 's by their IdSignature via ReferenceSymbolTable. Is there a way to get a IdSignature from an FirElement ?

[dmitriy.novozhilov]

There is a FirBasedSignatureComposer

[Manuel Wrage]

But this wouldn't work for local declarations right?

[Manuel Wrage]

And what about ConeKotlinType to IrType ?

[dmitriy.novozhilov]

But this wouldn't work for local declarations right?

Yes, it wouldn't

And what about ConeKotlinType to IrType?

This conversion is also unavailable outside fir2ir

[Manuel Wrage]

Okay thanks