import kotlin.reflect.*
import kotlin.reflect.full.*

inline fun <reified T : Any> T.update(other: Any): T {
    val copy = T::class.memberFunctions
        .filter { function ->
            function.name == "copy" &&
                function.parameters.firstOrNull()?.kind == KParameter.Kind.INSTANCE &&
                function.parameters.drop(1).all { it.isOptional }
        }
        .maxByOrNull { it.parameters.size }
        ?: throw NoSuchPropertyException()
    val args = mutableMapOf<KParameter, Any?>(copy.parameters.first() to this)
    for (function in other::class.memberFunctions) {
        if (
            !function.name.startsWith("component") ||
            function.parameters.singleOrNull()?.kind != KParameter.Kind.INSTANCE
        ) continue
        val index = function.name.removePrefix("component").toIntOrNull()
            ?.takeIf { it > 0 }
            ?: continue
        args[copy.parameters[index]] = function.call(other)
    }
    return copy.callBy(args) as T
}

data class A(val name: String, val surname: String)

fun main() {
    println(A("", "").update("Hello" to "world!")) // A(name = "Hello", surname = "world!")
}