DelegatingType extracted

compiler/frontend/src/org/jetbrains/jet/lang/resolve/BodyResolver.java

@@ -653,7 +653,7 @@ public class BodyResolver {
         if (type instanceof DeferredType) {
             DeferredType deferredType = (DeferredType) type;
             if (!deferredType.isComputed()) {
-                deferredType.getActualType();
+                deferredType.getDelegate();
             }
         }
     }
@@ -676,7 +676,7 @@ public class BodyResolver {
                 DeferredType deferredType = queue.pullFirst();
                 if (!deferredType.isComputed()) {
                     try {
-                        deferredType.getActualType(); // to compute
+                        deferredType.getDelegate(); // to compute
                     }
                     catch (ReenteringLazyValueComputationException e) {
                         // A problem should be reported while computing the type

compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationsChecker.java

@@ -198,7 +198,7 @@ public class DeclarationsChecker {
         if (propertyDescriptor.getModality() == Modality.ABSTRACT) {
             JetType returnType = propertyDescriptor.getReturnType();
             if (returnType instanceof DeferredType) {
-                returnType = ((DeferredType) returnType).getActualType();
+                returnType = ((DeferredType) returnType).getDelegate();
             }
 
             JetExpression initializer = property.getInitializer();

compiler/frontend/src/org/jetbrains/jet/lang/types/DeferredType.java

@@ -19,19 +19,15 @@ package org.jetbrains.jet.lang.types;
 import kotlin.Function0;
 import kotlin.Function1;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.jet.lang.descriptors.annotations.Annotations;
 import org.jetbrains.jet.lang.resolve.BindingTrace;
-import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.storage.NotNullLazyValue;
 import org.jetbrains.jet.storage.StorageManager;
 import org.jetbrains.jet.util.Box;
 import org.jetbrains.jet.util.ReenteringLazyValueComputationException;
 
-import java.util.List;
-
 import static org.jetbrains.jet.lang.resolve.BindingContext.DEFERRED_TYPE;
 
-public class DeferredType implements LazyType {
+public class DeferredType extends DelegatingType implements LazyType {
 
     private static final Function1 EMPTY_CONSUMER = new Function1<Object, Void>() {
         @Override
@@ -85,50 +81,16 @@ public class DeferredType implements LazyType {
         return lazyValue.isComputed();
     }
 
-    @NotNull
-    public JetType getActualType() {
+    @Override
+    public JetType getDelegate() {
         return lazyValue.invoke();
     }
 
-    @Override
-    @NotNull
-    public JetScope getMemberScope() {
-        return getActualType().getMemberScope();
-    }
-
-    @Override
-    public boolean isError() {
-        return getActualType().isError();
-    }
-
-    @Override
-    @NotNull
-    public TypeConstructor getConstructor() {
-        return getActualType().getConstructor();
-    }
-
-    @Override
-    @NotNull
-    public List<TypeProjection> getArguments() {
-        return getActualType().getArguments();
-    }
-
-    @Override
-    public boolean isNullable() {
-        return getActualType().isNullable();
-    }
-
-    @NotNull
-    @Override
-    public Annotations getAnnotations() {
-        return getActualType().getAnnotations();
-    }
-
     @Override
     public String toString() {
         try {
             if (lazyValue.isComputed()) {
-                return getActualType().toString();
+                return getDelegate().toString();
             }
             else {
                 return "<Not computed yet>";
@@ -138,14 +100,4 @@ public class DeferredType implements LazyType {
             return "<Failed to compute this type>";
         }
     }
-
-    @Override
-    public boolean equals(Object obj) {
-        return getActualType().equals(obj);
-    }
-
-    @Override
-    public int hashCode() {
-        return getActualType().hashCode();
-    }
 }

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingVisitorDispatcher.java

@@ -131,7 +131,7 @@ public class ExpressionTypingVisitorDispatcher extends JetVisitor<JetTypeInfo, E
             }
 
             if (result.getType() instanceof DeferredType) {
-                result = JetTypeInfo.create(((DeferredType) result.getType()).getActualType(), result.getDataFlowInfo());
+                result = JetTypeInfo.create(((DeferredType) result.getType()).getDelegate(), result.getDataFlowInfo());
             }
             if (result.getType() != null) {
                 context.trace.record(BindingContext.EXPRESSION_TYPE, expression, result.getType());

core/descriptors/src/org/jetbrains/jet/lang/types/DelegatingType.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2010-2014 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.types;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.descriptors.annotations.Annotations;
+import org.jetbrains.jet.lang.resolve.scopes.JetScope;
+
+import java.util.List;
+
+public abstract class DelegatingType implements JetType {
+    protected abstract JetType getDelegate();
+
+    @NotNull
+    @Override
+    public TypeConstructor getConstructor() {
+        return getDelegate().getConstructor();
+    }
+
+    @NotNull
+    @Override
+    public List<TypeProjection> getArguments() {
+        return getDelegate().getArguments();
+    }
+
+    @Override
+    public boolean isNullable() {
+        return getDelegate().isNullable();
+    }
+
+    @NotNull
+    @Override
+    public JetScope getMemberScope() {
+        return getDelegate().getMemberScope();
+    }
+
+    @Override
+    public boolean isError() {
+        return getDelegate().isError();
+    }
+
+    @NotNull
+    @Override
+    public Annotations getAnnotations() {
+        return getDelegate().getAnnotations();
+    }
+
+    @Override
+    public int hashCode() {
+        return getDelegate().hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return getDelegate().equals(obj);
+    }
+
+    @Override
+    public String toString() {
+        return getDelegate().toString();
+    }
+}

idea/src/org/jetbrains/jet/plugin/quickfix/QuickFixUtil.java

@@ -64,7 +64,7 @@ public class QuickFixUtil {
         if (!(descriptor instanceof CallableDescriptor)) return null;
         JetType type = ((CallableDescriptor) descriptor).getReturnType();
         if (type instanceof DeferredType) {
-            type = ((DeferredType) type).getActualType();
+            type = ((DeferredType) type).getDelegate();
         }
         return type;
     }