import kotlin.reflect.jvm.kotlin import kotlin.reflect.KMemberProperty import kotlin.reflect.KMemberExtensionProperty class A { val foo: String = "member" val Unit.foo: String get() = "extension" } fun box(): String { run { val foo: KMemberProperty = javaClass().kotlin.getProperties().single() assert(foo.name == "foo") { "Fail name: $foo (${foo.name})" } assert(foo.get(A()) == "member") { "Fail value: ${foo[A()]}" } } run { val foo: KMemberExtensionProperty = javaClass().kotlin.getExtensionProperties().single() assert(foo.name == "foo") { "Fail name: $foo (${foo.name})" } foo as KMemberExtensionProperty assert(foo.get(A(), Unit) == "extension") { "Fail value: ${foo[A(), Unit]}" } } return "OK" }