KT-394 Make class object members visible inside the owning class

KT-588 Unresolved static method

compiler/frontend/src/org/jetbrains/jet/lang/descriptors/MutableClassDescriptor.java

@@ -5,7 +5,9 @@ import com.google.common.collect.Sets;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor;
-import org.jetbrains.jet.lang.resolve.*;
+import org.jetbrains.jet.lang.resolve.AbstractScopeAdapter;
+import org.jetbrains.jet.lang.resolve.BindingTrace;
+import org.jetbrains.jet.lang.resolve.TraceBasedRedeclarationHandler;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.resolve.scopes.SubstitutingScope;
 import org.jetbrains.jet.lang.resolve.scopes.WritableScope;
@@ -43,10 +45,6 @@ public class MutableClassDescriptor extends MutableDeclarationDescriptor impleme
     private JetType superclassType;
     private ClassReceiver implicitReceiver;
 
-//    public MutableClassDescriptor(@NotNull BindingTrace trace, @NotNull DeclarationDescriptor containingDeclaration, @NotNull JetScope outerScope) {
-//        this(trace, containingDeclaration, outerScope, ClassKind.CLASS);
-//    }
-
     public MutableClassDescriptor(@NotNull BindingTrace trace, @NotNull DeclarationDescriptor containingDeclaration, @NotNull JetScope outerScope, ClassKind kind) {
         super(containingDeclaration);
         TraceBasedRedeclarationHandler redeclarationHandler = new TraceBasedRedeclarationHandler(trace);
@@ -66,6 +64,23 @@ public class MutableClassDescriptor extends MutableDeclarationDescriptor impleme
         }
         assert classObjectDescriptor.getKind() == ClassKind.OBJECT;
         this.classObjectDescriptor = classObjectDescriptor;
+
+        // Members of the class object are accessible from the class
+        // The scope must be lazy, because classObjectDescriptor may not by fully built yet
+        scopeForMemberResolution.importScope(new AbstractScopeAdapter() {
+            @NotNull
+            @Override
+            protected JetScope getWorkerScope() {
+                return MutableClassDescriptor.this.classObjectDescriptor.getDefaultType().getMemberScope();
+            }
+
+            @NotNull
+            @Override
+            public ReceiverDescriptor getImplicitReceiver() {
+                return MutableClassDescriptor.this.classObjectDescriptor.getImplicitReceiver();
+            }
+        }
+        );
         return ClassObjectStatus.OK;
     }
 

compiler/frontend/src/org/jetbrains/jet/lang/resolve/calls/TaskPrioritizer.java

@@ -98,8 +98,16 @@ import static org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverDescriptor
         }
         doComputeTasks(scope, explicitReceiver, call, name, result, AutoCastService.NO_AUTO_CASTS);
 
-        ReceiverDescriptor receiverToCast = explicitReceiver.exists() ? explicitReceiver : scope.getImplicitReceiver();
-        if (receiverToCast.exists()) {
+        List<ReceiverDescriptor> receivers;
+        if (explicitReceiver.exists()) {
+            receivers = Collections.singletonList(explicitReceiver);
+        }
+        else {
+            receivers = Lists.newArrayList();
+            scope.getImplicitReceiversHierarchy(receivers);
+        }
+        for (ReceiverDescriptor receiverToCast : receivers) {
+            assert receiverToCast.exists();
             doComputeTasks(scope, receiverToCast, call, name, result, new AutoCastServiceImpl(dataFlowInfo, bindingContext));
         }
         return result;

compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeImpl.java

@@ -232,15 +232,6 @@ public class WritableScopeImpl extends WritableScopeWithImports {
         return super.getClassifier(name);
     }
 
-    @NotNull
-    @Override
-    public ReceiverDescriptor getImplicitReceiver() {
-        if (implicitReceiver == null) {
-            return super.getImplicitReceiver();
-        }
-        return implicitReceiver;
-    }
-
     @Override
     public void addNamespace(@NotNull NamespaceDescriptor namespaceDescriptor) {
         Map<String, DeclarationDescriptor> variableClassOrNamespaceDescriptors = getVariableClassOrNamespaceDescriptors();
@@ -272,6 +263,15 @@ public class WritableScopeImpl extends WritableScopeWithImports {
         return super.getNamespace(name);
     }
 
+    @NotNull
+    @Override
+    public ReceiverDescriptor getImplicitReceiver() {
+        if (implicitReceiver == null) {
+            return super.getImplicitReceiver();
+        }
+        return implicitReceiver;
+    }
+
     @Override
     public void setImplicitReceiver(@NotNull ReceiverDescriptor implicitReceiver) {
         if (this.implicitReceiver != null) {

compiler/frontend/src/org/jetbrains/jet/lang/resolve/scopes/WritableScopeWithImports.java

@@ -7,6 +7,7 @@ import org.jetbrains.jet.lang.descriptors.ClassifierDescriptor;
 import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
 import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
 import org.jetbrains.jet.lang.descriptors.VariableDescriptor;
+import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverDescriptor;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -50,6 +51,20 @@ public abstract class WritableScopeWithImports extends JetScopeAdapter implement
         currentIndividualImportScope = null;
     }
 
+    @Override
+    public void getImplicitReceiversHierarchy(@NotNull List<ReceiverDescriptor> result) {
+        super.getImplicitReceiversHierarchy(result);
+        // Imported scopes come with their receivers
+        // Example: class member resolution scope imports a scope of it's class object
+        //          members of the class object must be able to find it as an implicit receiver
+        for (JetScope scope : getImports()) {
+            ReceiverDescriptor definedReceiver = scope.getImplicitReceiver();
+            if (definedReceiver.exists()) {
+                result.add(0, definedReceiver);
+            }
+        }
+    }
+
     @Override
     public VariableDescriptor getVariable(@NotNull String name) {
         // Meaningful lookup goes here

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

@@ -111,13 +111,6 @@ public class ClosureExpressionsTypingVisitor extends ExpressionTypingVisitor {
     private FunctionDescriptorImpl createFunctionDescriptor(JetFunctionLiteralExpression expression, ExpressionTypingContext context, boolean functionTypeExpected) {
         JetFunctionLiteral functionLiteral = expression.getFunctionLiteral();
         JetTypeReference receiverTypeRef = functionLiteral.getReceiverTypeRef();
-        final JetType receiverType;
-        if (receiverTypeRef != null) {
-            receiverType = context.getTypeResolver().resolveType(context.scope, receiverTypeRef);
-        } else {
-            ReceiverDescriptor implicitReceiver = context.scope.getImplicitReceiver();
-            receiverType = implicitReceiver.exists() ? implicitReceiver.getType() : null;
-        }
         FunctionDescriptorImpl functionDescriptor = new FunctionDescriptorImpl(
                 context.scope.getContainingDeclaration(), Collections.<AnnotationDescriptor>emptyList(), "<anonymous>");
 
@@ -133,7 +126,7 @@ public class ClosureExpressionsTypingVisitor extends ExpressionTypingVisitor {
             }
         }
         else {
-            effectiveReceiverType = receiverType;
+            effectiveReceiverType = context.getTypeResolver().resolveType(context.scope, receiverTypeRef);
         }
         functionDescriptor.initialize(effectiveReceiverType, NO_RECEIVER, Collections.<TypeParameterDescriptor>emptyList(), valueParameterDescriptors, null, Modality.FINAL, Visibility.LOCAL);
         context.trace.record(BindingContext.FUNCTION, expression, functionDescriptor);

compiler/testData/checkerWithErrorTypes/quick/regressions/kt394.jet

@@ -0,0 +1,11 @@
+// KT-394 Make class object members visible inside the owning class
+
+class X() {
+//    class Y {}
+
+    class object{
+        class Y() {}
+    }
+
+    val y : Y = Y()
+}

compiler/testData/checkerWithErrorTypes/quick/regressions/kt588.jet

@@ -0,0 +1,12 @@
+// KT-588 Unresolved static method
+class Test() : Thread("Test") {
+    class object {
+        fun init2() {
+
+        }
+    }
+    override fun run() {
+        init2()      // unresolved
+        Test.init2() // ok
+    }
+}