KT-8408 Prohibit Array<T>::class for non-reified T

compiler/testData/codegen/boxWithStdlib/reflection/classLiterals/genericArrays.kt

@@ -0,0 +1,28 @@
+import kotlin.test.*
+import kotlin.reflect.*
+import kotlin.reflect.jvm.*
+
+class Klass
+
+inline fun <reified T> arrayClass(): KClass<Array<T>> = Array<T>::class
+
+fun box(): String {
+    assertEquals("Array", arrayClass<Int>().simpleName)
+    assertEquals("Array", arrayClass<Int?>().simpleName)
+    assertEquals("Array", arrayClass<Array<Int>>().simpleName)
+    assertEquals("Array", arrayClass<Klass>().simpleName)
+    assertEquals("Array", arrayClass<Klass?>().simpleName)
+    assertEquals("Array", arrayClass<Array<Klass>>().simpleName)
+    assertEquals("Array", arrayClass<Array<Klass?>>().simpleName)
+
+    // Should not be that way. Fix this test when backend is fixed.
+    assertEquals("[Ljava.lang.Object;", arrayClass<Int>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Int?>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Array<Int>>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Klass>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Klass?>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Array<Klass>>().jvmName)
+    assertEquals("[Ljava.lang.Object;", arrayClass<Array<Klass?>>().jvmName)
+
+    return "OK"
+}

compiler/testData/diagnostics/tests/classLiteral/genericArrays.kt

@@ -0,0 +1,8 @@
+import kotlin.reflect.KClass
+
+fun f1<T>(): KClass<Array<T>> = <!CLASS_LITERAL_LHS_NOT_A_CLASS!>Array<T>::class<!>
+fun f2<T>(): KClass<Array<Array<T>>> = <!CLASS_LITERAL_LHS_NOT_A_CLASS!>Array<Array<T>>::class<!>
+inline fun f3<reified T>() = Array<T>::class
+inline fun f4<reified T>() = Array<Array<T>>::class
+fun f5(): KClass<Array<Any>> = <!CLASS_LITERAL_LHS_NOT_A_CLASS!>Array<*>::class<!>
+fun f6(): KClass<Array<Int?>> = Array<Int?>::class

compiler/testData/diagnostics/tests/classLiteral/genericArrays.txt

@@ -0,0 +1,8 @@
+package
+
+internal fun </*0*/ T> f1(): kotlin.reflect.KClass<kotlin.Array<T>>
+internal fun </*0*/ T> f2(): kotlin.reflect.KClass<kotlin.Array<kotlin.Array<T>>>
+kotlin.inline() internal fun </*0*/ reified T> f3(): kotlin.reflect.KClass<kotlin.Array<T>>
+kotlin.inline() internal fun </*0*/ reified T> f4(): kotlin.reflect.KClass<kotlin.Array<kotlin.Array<T>>>
+internal fun f5(): kotlin.reflect.KClass<kotlin.Array<kotlin.Any>>
+internal fun f6(): kotlin.reflect.KClass<kotlin.Array<kotlin.Int?>>