Morfly

override fun visitClassDeclaration(classDeclaration: KSClassDeclaration, data: Unit) {
    if (classDeclaration.classKind != ClassKind.INTERFACE) {
        logger.error("Only interface can be annotated with @Function", classDeclaration)
        return
    }

    // Getting the @Function annotation object.
    val annotation: KSAnnotation = classDeclaration.annotations.first {
        it.shortName.asString() == "Function"
    }

Morfly

fun visitPropertyDeclaration(...) { ... }

private fun visitTypeArguments(typeArguments: List<KSTypeArgument>) {
    if (typeArguments.isNotEmpty()) {
        file += "<"
        typeArguments.forEachIndexed { i, arg ->
            visitTypeArgument(arg, data = Unit)
            if (i < typeArguments.lastIndex) file += ", "
        }
        file += ">"

Morfly

package com.morfly

@Function(name = "functionWithoutArgs")
interface FunctionWithoutArgs

@Function(name = "myAmazingFunction")
interface MyAmazingFunction {
    val arg1: String?
    val arg2: List<Int?>
    val arg3: List<Map<String, *>>

Morfly

// main-project/build.gradle.kts
...

kotlin.sourceSets.main {
    kotlin.srcDirs(
        file("$buildDir/generated/ksp/main/kotlin"),
    )
}

Morfly

package com.morfly

fun functionWithoutArgs() {
    println("Hello from functionWithoutArgs")
}

fun myAmazingFunction(
    arg1: kotlin.String?,
    arg2: kotlin.collections.List<kotlin.Int?>,
    arg3: kotlin.collections.List<kotlin.collections.Map<kotlin.String, *>>,

Morfly

fun myAmazingFunction(
    arg1: String,
    arg2: Map<String, List<*>>
) {
    println("Hello from myAmazingFunction")
}

Morfly

@Function(name = "myAmazingFunction")
interface MyAmazingFunction {
    val arg1: List<Int>,
    val arg2: Map<String, List<String>>
}

Morfly

fun myAmazingFunction(
    arg1: List<*>,
    arg2: Map<*, *>,
) {
    println("Hello from myAmazingFunction")
}

Morfly

override fun visitTypeArgument(typeArgument: KSTypeArgument, data: Unit) {
    if (options["ignoreGenericArgs"] == "true") {
        file += "*"
        return
    }
    
    // the rest of the code
    ... 
}

Morfly

// main-project/build.gradle.kts
...

ksp {
    arg("ignoreGenericArgs", "true")
}