Introduce KProperty{0,1,2}.getDelegate

#KT-8384 In Progress
2016-12-22 18:30:38 +03:00
parent f1cd2ee6fd
commit 78f2515e95
47 changed files with 1398 additions and 0 deletions
@@ -0,0 +1,44 @@
+// IGNORE_BACKEND: JS
+// WITH_REFLECT
+
+import kotlin.reflect.KProperty
+import kotlin.reflect.KProperty2
+import kotlin.reflect.full.IllegalPropertyDelegateAccessException
+import kotlin.test.*
+
+object Delegate {
+    operator fun getValue(instance: Any?, property: KProperty<*>) = true
+}
+
+val topLevel: Boolean by Delegate
+val String.extension: Boolean by Delegate
+
+class Foo {
+    val member: Boolean by Delegate
+    val String.memberExtension: Boolean by Delegate
+}
+
+inline fun check(block: () -> Unit) {
+    try {
+        block()
+        throw AssertionError("No IllegalPropertyDelegateAccessException has been thrown")
+    } catch (e: IllegalPropertyDelegateAccessException) {
+        // OK
+    }
+}
+
+fun box(): String {
+    check { ::topLevel.getDelegate() }
+
+    check { String::extension.getDelegate("") }
+    check { ""::extension.getDelegate() }
+
+    val foo = Foo()
+    check { Foo::member.getDelegate(foo) }
+    check { foo::member.getDelegate() }
+
+    val me = Foo::class.members.single { it.name == "memberExtension" } as KProperty2<Foo, String, Boolean>
+    check { me.getDelegate(foo, "") }
+
+    return "OK"
+}