In IR compiler/plugin code, it’s possible to gener...

# compiler

[Drew Hamilton]

In IR compiler/plugin code, it’s possible to generate a call to a function via irCall, like how data classes have generated calls to their properties’ hashCode functions. Is it possible to generate a call to an arbitrary function that you don’t have a direct reference to, like a kotlin-stdlib-common function?

[Tóth István Zoltán]

Yes, it is possible. You can check the code below for an example of looking for the function. Search for referenceClass. Note, that referenceClass is a "FIR incompatible API" whatever that means at the moment. They might change it, but I guess a similar functionality will be added as it would be nigh impossible to write the compiler without it.

I'm nowhere close to a JB official, so this information is just what I've gathered by reading other plugins and the compiler code. Take it with a bit of salt.

As for the call itself, it is pretty simple, just search the plugin code for irCall or IrCallImpl.

Pay attention to the dispatch receivers, those are really deep rabbit holes I've fallen into again and again.

https://github.com/spxbhuhb/rui/blob/2f1204101c32f952dc7e833df7acbe355ab639c2/rui-[…]n/kotlin/hu/simplexion/rui/kotlin/plugin/ir/RuiPluginContext.kt

[dmitriy.novozhilov]

There are methods in plugin context which compatible with FIR already. They take ClassId/CallableId instead of FqName

[Tóth István Zoltán]

Ah, good to know, I'll check that out, thanks.

[Drew Hamilton]

Thanks, looks like it’s working!