Supported converting member properties to extensions

Additionally, we now generate <selection>throw UnsupportedOperationException()</selection> when a missing body is added

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetCallableDeclaration.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2013 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.
+ */
+
+package org.jetbrains.jet.lang.psi;
+
+import org.jetbrains.annotations.Nullable;
+
+public interface JetCallableDeclaration extends JetNamedDeclaration, JetTypeParameterListOwner {
+    @Nullable
+    JetParameterList getValueParameterList();
+
+    @Nullable
+    JetTypeReference getReceiverTypeRef();
+
+    @Nullable
+    JetTypeReference getReturnTypeRef();
+}

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetFunction.java

@@ -16,17 +16,7 @@
 
 package org.jetbrains.jet.lang.psi;
 
-import org.jetbrains.annotations.Nullable;
-
-public interface JetFunction extends JetTypeParameterListOwner, JetDeclarationWithBody {
-    @Nullable
-    JetParameterList getValueParameterList();
-
-    @Nullable
-    JetTypeReference getReceiverTypeRef();
-
-    @Nullable
-    JetTypeReference getReturnTypeRef();
+public interface JetFunction extends JetDeclarationWithBody, JetCallableDeclaration {
 
     boolean isLocal();
 }

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetProperty.java

@@ -39,7 +39,8 @@ import static org.jetbrains.jet.JetNodeTypes.PROPERTY_ACCESSOR;
 import static org.jetbrains.jet.JetNodeTypes.PROPERTY_DELEGATE;
 import static org.jetbrains.jet.lexer.JetTokens.*;
 
-public class JetProperty extends JetTypeParameterListOwnerStub<PsiJetPropertyStub> implements JetVariableDeclaration {
+public class JetProperty extends JetTypeParameterListOwnerStub<PsiJetPropertyStub> implements JetVariableDeclaration,
+                                                                                              JetCallableDeclaration {
     public JetProperty(@NotNull ASTNode node) {
         super(node);
     }
@@ -98,6 +99,13 @@ public class JetProperty extends JetTypeParameterListOwnerStub<PsiJetPropertyStu
         }   else return super.getUseScope();
     }
 
+    @Nullable
+    @Override
+    public JetParameterList getValueParameterList() {
+        return null;
+    }
+
+    @Override
     @Nullable
     public JetTypeReference getReceiverTypeRef() {
         ASTNode node = getNode().getFirstChildNode();
@@ -114,6 +122,12 @@ public class JetProperty extends JetTypeParameterListOwnerStub<PsiJetPropertyStu
         return null;
     }
 
+    @Nullable
+    @Override
+    public JetTypeReference getReturnTypeRef() {
+        return getTypeRef();
+    }
+
     @Override
     @Nullable
     public JetTypeReference getTypeRef() {

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetPsiFactory.java

@@ -167,7 +167,7 @@ public class JetPsiFactory {
         return createDeclaration(project, text, JetProperty.class);
     }
 
-    private static <T> T createDeclaration(Project project, String text, Class<T> clazz) {
+    public static <T> T createDeclaration(Project project, String text, Class<T> clazz) {
         JetFile file = createFile(project, text);
         List<JetDeclaration> dcls = file.getDeclarations();
         assert dcls.size() == 1 : dcls.size() + " declarations in " + text;