Hi, I'm trying to change the visibility on certai...

# compiler

[Ahmed Mourad]

Hi,

I'm trying to change the visibility on certain functions from public to lower values.

So, I created this a synthetic resolver with this method:

override fun generateSyntheticMethods(
    thisDescriptor: ClassDescriptor,
    name: Name,
    bindingContext: BindingContext,
    fromSupertypes: List<SimpleFunctionDescriptor>,
    result: MutableCollection<SimpleFunctionDescriptor>
) {

    /* ... */
    result.elementAt(methodIndex).let { descriptor ->
        val replacement = descriptor.createCustomCopy {
            it.newCopyBuilder().setVisibility(newVisibility)
        }
        result.remove(descriptor)
        result.add(replacement)
    }
}

This works for if newVisibility is private and protected but does not work if it's internal and gives this error:

Exception in thread "main" java.lang.NoSuchMethodError: dev.ahmedmourad.sample.SomeClass.functionName$ModuleName(Ljava/lang/String;)Ldev/ahmedmourad/sample/SomeClass;
	at dev.ahmedmourad.sample.MainKt.main(Main.kt:25)
	at dev.ahmedmourad.sample.MainKt.main(Main.kt)

I know that the internal modifier doesn't exist in the JVM and that synthetic methods are used to simulate it, so I guess I need to create a synthetic method whenever I change access to internal, how and where do I do that?

[rnett]

I'm not sure, but you might be able to look at how the allopen compiler plugin works and replicate it. I think it uses FIR, so most of that should be handled. It's in the kotlin repo.