Introduce common KClass interface #KT-25935

core/builtins/src/kotlin/reflect/KClass.kt

@@ -1,19 +1,10 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
  */
 
+@file:Suppress("ACTUAL_WITHOUT_EXPECT") // for building kotlin-runtime
+
 package kotlin.reflect
 
 /**
@@ -24,12 +15,12 @@ package kotlin.reflect
  *
  * @param T the type of the class.
  */
-public interface KClass<T : Any> : KDeclarationContainer, KAnnotatedElement, KClassifier {
+public actual interface KClass<T : Any> : KDeclarationContainer, KAnnotatedElement, KClassifier {
     /**
      * The simple name of the class as it was declared in the source code,
      * or `null` if the class has no name (if, for example, it is an anonymous object literal).
      */
-    public val simpleName: String?
+    public actual val simpleName: String?
 
     /**
      * The fully qualified dot-separated name of the class,

libraries/stdlib/src/kotlin/reflect/KClass.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.reflect
+
+/**
+ * Represents a class and provides introspection capabilities.
+ * Instances of this class are obtainable by the `::class` syntax.
+ * See the [Kotlin language documentation](http://kotlinlang.org/docs/reference/reflection.html#class-references)
+ * for more information.
+ *
+ * @param T the type of the class.
+ */
+public expect interface KClass<T : Any> {
+    /**
+     * The simple name of the class as it was declared in the source code,
+     * or `null` if the class has no name (if, for example, it is an anonymous object literal).
+     */
+    public val simpleName: String?
+}