Kotlin: how to get a list of unknown Enum values?

Question

Kotlin

In other words, how to implement the getEnumValues ​​function:

fun getEnumValues(enumClass: KClass<Enum<*>>): Array<Enum<*>>{
 ...
}

There is a built-in enumValues ​​function for this, but it has a reified parameter that cannot be passed such a parameter to.

Answer 1

I couldn't think of anything better than this :(

fun KClass<out Enum<*>>.enumValues(): Array<Enum<*>> {
    @Suppress("UNCHECKED_CAST")
    return this.java.getMethod("values").invoke(null) as Array<Enum<*>>
}

Answer 2

On the JVM, you can use java.lang.Class#getEnumConstants for this :
Under the hood, it uses the same reflection but caches the result.