Modify top-level/extension property hierarchy

- rename KTopLevelProperty to KTopLevelVariable
- create KTopLevelExtensionProperty, a subclass of KExtensionProperty
- create KTopLevelProperty, a superclass of KTopLevelVariable and
  KTopLevelExtensionProperty. (In the future, it will have a container of type
  KPackage.)

core/runtime.jvm/src/kotlin/reflect/jvm/internal/KTopLevelExtensionPropertyImpl.kt

@@ -18,11 +18,11 @@ package kotlin.reflect.jvm.internal
 
 import java.lang.reflect.*
 
-open class KExtensionPropertyImpl<T, out R>(
+open class KTopLevelExtensionPropertyImpl<T, out R>(
         public override val name: String,
         protected val owner: KPackageImpl,
         protected val receiverClass: Class<T>
-) : KExtensionProperty<T, R>, KPropertyImpl<R> {
+) : KTopLevelExtensionProperty<T, R>, KPropertyImpl<R> {
     override val field: Field? get() = null
 
     // TODO: extract, make lazy (weak?), use our descriptors knowledge, support Java fields
@@ -33,11 +33,11 @@ open class KExtensionPropertyImpl<T, out R>(
     }
 }
 
-class KMutableExtensionPropertyImpl<T, R>(
+class KMutableTopLevelExtensionPropertyImpl<T, R>(
         name: String,
         owner: KPackageImpl,
         receiverClass: Class<T>
-) : KMutableExtensionProperty<T, R>, KMutablePropertyImpl<R>, KExtensionPropertyImpl<T, R>(name, owner, receiverClass) {
+) : KMutableTopLevelExtensionProperty<T, R>, KMutablePropertyImpl<R>, KTopLevelExtensionPropertyImpl<T, R>(name, owner, receiverClass) {
     override val setter: Method = owner.jClass.getMethod(setterName(name), receiverClass, getter.getReturnType()!!)
 
     override fun set(receiver: T, value: R) {

core/runtime.jvm/src/kotlin/reflect/jvm/internal/KTopLevelVariableImpl.kt

@@ -18,10 +18,10 @@ package kotlin.reflect.jvm.internal
 
 import java.lang.reflect.*
 
-open class KTopLevelPropertyImpl<out R>(
+open class KTopLevelVariableImpl<out R>(
         public override val name: String,
         protected val owner: KPackageImpl
-) : KTopLevelProperty<R>, KVariableImpl<R> {
+) : KTopLevelVariable<R>, KVariableImpl<R> {
     // TODO: load the field from the corresponding package part
     override val field: Field? get() = null
 
@@ -33,10 +33,10 @@ open class KTopLevelPropertyImpl<out R>(
     }
 }
 
-class KMutableTopLevelPropertyImpl<R>(
+class KMutableTopLevelVariableImpl<R>(
         name: String,
         owner: KPackageImpl
-) : KMutableTopLevelProperty<R>, KMutableVariableImpl<R>, KTopLevelPropertyImpl<R>(name, owner) {
+) : KMutableTopLevelVariable<R>, KMutableVariableImpl<R>, KTopLevelVariableImpl<R>(name, owner) {
     override val setter: Method = owner.jClass.getMethod(setterName(name), getter.getReturnType()!!)
 
     override fun set(value: R) {

core/runtime.jvm/src/kotlin/reflect/jvm/internal/factory.kt

@@ -23,14 +23,14 @@ fun <T> kClass(jClass: Class<T>): KClassImpl<T> =
 fun kPackage(jClass: Class<*>): KPackageImpl =
         KPackageImpl(jClass)
 
-fun topLevelProperty(name: String, owner: KPackageImpl): KTopLevelPropertyImpl<Any?> =
-        KTopLevelPropertyImpl<Any?>(name, owner)
+fun topLevelVariable(name: String, owner: KPackageImpl): KTopLevelVariableImpl<Any?> =
+        KTopLevelVariableImpl<Any?>(name, owner)
 
-fun mutableTopLevelProperty(name: String, owner: KPackageImpl): KMutableTopLevelPropertyImpl<Any?> =
-        KMutableTopLevelPropertyImpl<Any?>(name, owner)
+fun mutableTopLevelVariable(name: String, owner: KPackageImpl): KMutableTopLevelVariableImpl<Any?> =
+        KMutableTopLevelVariableImpl<Any?>(name, owner)
 
-fun <T> extensionProperty(name: String, owner: KPackageImpl, receiver: Class<T>): KExtensionPropertyImpl<T, Any?> =
-        KExtensionPropertyImpl<T, Any?>(name, owner, receiver)
+fun <T> topLevelExtensionProperty(name: String, owner: KPackageImpl, receiver: Class<T>): KTopLevelExtensionPropertyImpl<T, Any?> =
+        KTopLevelExtensionPropertyImpl<T, Any?>(name, owner, receiver)
 
-fun <T> mutableExtensionProperty(name: String, owner: KPackageImpl, receiver: Class<T>): KMutableExtensionPropertyImpl<T, Any?> =
-        KMutableExtensionPropertyImpl<T, Any?>(name, owner, receiver)
+fun <T> mutableTopLevelExtensionProperty(name: String, owner: KPackageImpl, receiver: Class<T>): KMutableTopLevelExtensionPropertyImpl<T, Any?> =
+        KMutableTopLevelExtensionPropertyImpl<T, Any?>(name, owner, receiver)