@Nullable
  private JetType getVariableType(
      @NotNull JetSimpleNameExpression nameExpression,
      @NotNull ReceiverValue receiver,
      @Nullable ASTNode callOperationNode,
      @NotNull ResolutionContext context,
      @NotNull boolean[] result) {
    TemporaryBindingTrace traceForVariable =
        TemporaryBindingTrace.create(
            context.trace, "trace to resolve as local variable or property", nameExpression);
    CallResolver callResolver = expressionTypingServices.getCallResolver();
    Call call = CallMaker.makePropertyCall(receiver, callOperationNode, nameExpression);
    OverloadResolutionResults<VariableDescriptor> resolutionResult =
        callResolver.resolveSimpleProperty(
            BasicCallResolutionContext.create(
                context.replaceBindingTrace(traceForVariable),
                call,
                ResolveMode.TOP_LEVEL_CALL,
                ResolutionResultsCache.create()));
    if (!resolutionResult.isNothing()) {
      traceForVariable.commit();
      checkSuper(receiver, resolutionResult, context.trace, nameExpression);
      result[0] = true;
      return resolutionResult.isSingleResult()
          ? resolutionResult.getResultingDescriptor().getReturnType()
          : null;
    }

    ResolutionContext newContext =
        receiver.exists() ? context.replaceScope(receiver.getType().getMemberScope()) : context;
    TemporaryBindingTrace traceForNamespaceOrClassObject =
        TemporaryBindingTrace.create(
            context.trace, "trace to resolve as namespace or class object", nameExpression);
    JetType jetType =
        lookupNamespaceOrClassObject(
            nameExpression, newContext.replaceBindingTrace(traceForNamespaceOrClassObject));
    if (jetType != null) {
      traceForNamespaceOrClassObject.commit();

      // Uncommitted changes in temp context
      context.trace.record(RESOLUTION_SCOPE, nameExpression, context.scope);
      if (context.dataFlowInfo.hasTypeInfoConstraints()) {
        context.trace.record(
            NON_DEFAULT_EXPRESSION_DATA_FLOW, nameExpression, context.dataFlowInfo);
      }
      result[0] = true;
      return jetType;
    }
    result[0] = false;
    return null;
  }
 @NotNull
 private JetTypeInfo getSelectorReturnTypeInfo(
     @NotNull ReceiverValue receiver,
     @Nullable ASTNode callOperationNode,
     @NotNull JetExpression selectorExpression,
     @NotNull ResolutionContext context,
     @NotNull ResolveMode resolveMode,
     @NotNull ResolutionResultsCache resolutionResultsCache) {
   if (selectorExpression instanceof JetCallExpression) {
     return getCallExpressionTypeInfoWithoutFinalTypeCheck(
         (JetCallExpression) selectorExpression,
         receiver,
         callOperationNode,
         context,
         resolveMode,
         resolutionResultsCache);
   } else if (selectorExpression instanceof JetSimpleNameExpression) {
     return getSimpleNameExpressionTypeInfo(
         (JetSimpleNameExpression) selectorExpression, receiver, callOperationNode, context);
   } else if (selectorExpression instanceof JetQualifiedExpression) {
     JetQualifiedExpression qualifiedExpression = (JetQualifiedExpression) selectorExpression;
     JetExpression newReceiverExpression = qualifiedExpression.getReceiverExpression();
     JetTypeInfo newReceiverTypeInfo =
         getSelectorReturnTypeInfo(
             receiver,
             callOperationNode,
             newReceiverExpression,
             context.replaceExpectedType(NO_EXPECTED_TYPE),
             resolveMode,
             resolutionResultsCache);
     JetType newReceiverType = newReceiverTypeInfo.getType();
     DataFlowInfo newReceiverDataFlowInfo = newReceiverTypeInfo.getDataFlowInfo();
     JetExpression newSelectorExpression = qualifiedExpression.getSelectorExpression();
     if (newReceiverType != null && newSelectorExpression != null) {
       ExpressionReceiver expressionReceiver =
           new ExpressionReceiver(newReceiverExpression, newReceiverType);
       return getSelectorReturnTypeInfo(
           expressionReceiver,
           qualifiedExpression.getOperationTokenNode(),
           newSelectorExpression,
           context.replaceDataFlowInfo(newReceiverDataFlowInfo),
           resolveMode,
           resolutionResultsCache);
     }
   } else {
     context.trace.report(ILLEGAL_SELECTOR.on(selectorExpression, selectorExpression.getText()));
   }
   return JetTypeInfo.create(null, context.dataFlowInfo);
 }
  @Nullable
  private JetType lookupNamespaceOrClassObject(
      @NotNull JetSimpleNameExpression expression, @NotNull ResolutionContext context) {
    Name referencedName = expression.getReferencedNameAsName();
    final ClassifierDescriptor classifier = context.scope.getClassifier(referencedName);
    if (classifier != null) {
      JetType classObjectType = classifier.getClassObjectType();
      if (classObjectType != null) {
        context.trace.record(REFERENCE_TARGET, expression, classifier);
        JetType result =
            getExtendedClassObjectType(classObjectType, referencedName, classifier, context);
        if (result == null) {
          context.trace.report(NO_CLASS_OBJECT.on(expression, classifier));
        }
        return DataFlowUtils.checkType(result, expression, context);
      }
    }
    JetType[] result = new JetType[1];
    TemporaryBindingTrace temporaryTrace =
        TemporaryBindingTrace.create(
            context.trace, "trace for namespace/class object lookup of name", referencedName);
    if (furtherNameLookup(expression, result, context.replaceBindingTrace(temporaryTrace))) {
      temporaryTrace.commit();
      return DataFlowUtils.checkType(result[0], expression, context);
    }
    // To report NO_CLASS_OBJECT when no namespace found
    if (classifier != null) {
      if (classifier instanceof TypeParameterDescriptor) {
        if (context.expressionPosition == ExpressionPosition.FREE) {
          context.trace.report(
              TYPE_PARAMETER_IS_NOT_AN_EXPRESSION.on(
                  expression, (TypeParameterDescriptor) classifier));
        } else {
          context.trace.report(
              TYPE_PARAMETER_ON_LHS_OF_DOT.on(expression, (TypeParameterDescriptor) classifier));
        }
      } else if (context.expressionPosition == ExpressionPosition.FREE) {
        context.trace.report(NO_CLASS_OBJECT.on(expression, classifier));
      }
      context.trace.record(REFERENCE_TARGET, expression, classifier);
      JetScope scopeForStaticMembersResolution =
          classifier instanceof ClassDescriptor
              ? getStaticNestedClassesScope((ClassDescriptor) classifier)
              : new JetScopeImpl() {
                @NotNull
                @Override
                public DeclarationDescriptor getContainingDeclaration() {
                  return classifier;
                }

                @Override
                public String toString() {
                  return "Scope for the type parameter on the left hand side of dot";
                }
              };
      return new NamespaceType(referencedName, scopeForStaticMembersResolution);
    }
    temporaryTrace.commit();
    return result[0];
  }
  @NotNull
  public TypeInfoForCall getQualifiedExpressionExtendedTypeInfo(
      @NotNull JetQualifiedExpression expression,
      @NotNull ResolutionContext context,
      @NotNull ResolveMode resolveMode) {
    // TODO : functions as values
    JetExpression selectorExpression = expression.getSelectorExpression();
    JetExpression receiverExpression = expression.getReceiverExpression();
    JetTypeInfo receiverTypeInfo =
        expressionTypingServices.getTypeInfoWithNamespaces(
            receiverExpression,
            context.scope,
            NO_EXPECTED_TYPE,
            context.dataFlowInfo,
            context.trace);
    JetType receiverType = receiverTypeInfo.getType();
    if (selectorExpression == null) return TypeInfoForCall.create(null, context.dataFlowInfo);
    if (receiverType == null)
      receiverType = ErrorUtils.createErrorType("Type for " + expression.getText());

    context = context.replaceDataFlowInfo(receiverTypeInfo.getDataFlowInfo());

    if (selectorExpression instanceof JetSimpleNameExpression) {
      ConstantUtils.propagateConstantValues(
          expression, context.trace, (JetSimpleNameExpression) selectorExpression);
    }

    TypeInfoForCall selectorReturnTypeInfo =
        getSelectorReturnTypeInfo(
            new ExpressionReceiver(receiverExpression, receiverType),
            expression.getOperationTokenNode(),
            selectorExpression,
            context,
            resolveMode);
    JetType selectorReturnType = selectorReturnTypeInfo.getType();

    // TODO move further
    if (!(receiverType instanceof NamespaceType)
        && expression.getOperationSign() == JetTokens.SAFE_ACCESS) {
      if (selectorReturnType != null
          && !selectorReturnType.isNullable()
          && !KotlinBuiltIns.getInstance().isUnit(selectorReturnType)) {
        if (receiverType.isNullable()) {
          selectorReturnType = TypeUtils.makeNullable(selectorReturnType);
        }
      }
    }

    // TODO : this is suspicious: remove this code?
    if (selectorReturnType != null) {
      context.trace.record(BindingContext.EXPRESSION_TYPE, selectorExpression, selectorReturnType);
    }
    JetTypeInfo typeInfo =
        JetTypeInfo.create(selectorReturnType, selectorReturnTypeInfo.getDataFlowInfo());
    if (resolveMode == ResolveMode.TOP_LEVEL_CALL) {
      DataFlowUtils.checkType(typeInfo.getType(), expression, context, typeInfo.getDataFlowInfo());
    }
    return TypeInfoForCall.create(typeInfo, selectorReturnTypeInfo);
  }
  @NotNull
  public JetTypeInfo getSimpleNameExpressionTypeInfo(
      @NotNull JetSimpleNameExpression nameExpression,
      @NotNull ReceiverValue receiver,
      @Nullable ASTNode callOperationNode,
      @NotNull ResolutionContext context) {
    boolean[] result = new boolean[1];

    TemporaryBindingTrace traceForVariable =
        TemporaryBindingTrace.create(context.trace, "trace to resolve as variable", nameExpression);
    JetType type =
        getVariableType(
            nameExpression,
            receiver,
            callOperationNode,
            context.replaceBindingTrace(traceForVariable),
            result);
    if (result[0]) {
      traceForVariable.commit();
      if (type instanceof NamespaceType && context.expressionPosition == ExpressionPosition.FREE) {
        type = null;
      }
      return JetTypeInfo.create(type, context.dataFlowInfo);
    }

    Call call =
        CallMaker.makeCall(
            nameExpression,
            receiver,
            callOperationNode,
            nameExpression,
            Collections.<ValueArgument>emptyList());
    TemporaryBindingTrace traceForFunction =
        TemporaryBindingTrace.create(context.trace, "trace to resolve as function", nameExpression);
    ResolvedCall<FunctionDescriptor> resolvedCall =
        getResolvedCallForFunction(
            call,
            nameExpression,
            receiver,
            context,
            ResolveMode.TOP_LEVEL_CALL,
            ResolutionResultsCache.create(),
            result);
    if (result[0]) {
      FunctionDescriptor functionDescriptor =
          resolvedCall != null ? resolvedCall.getResultingDescriptor() : null;
      traceForFunction.commit();
      boolean hasValueParameters =
          functionDescriptor == null || functionDescriptor.getValueParameters().size() > 0;
      context.trace.report(
          FUNCTION_CALL_EXPECTED.on(nameExpression, nameExpression, hasValueParameters));
      type = functionDescriptor != null ? functionDescriptor.getReturnType() : null;
      return JetTypeInfo.create(type, context.dataFlowInfo);
    }

    traceForVariable.commit();
    return JetTypeInfo.create(null, context.dataFlowInfo);
  }
 @Nullable
 private JetType lookupNamespaceOrClassObject(
     @NotNull JetSimpleNameExpression expression, @NotNull ResolutionContext context) {
   Name referencedName = expression.getReferencedNameAsName();
   ClassifierDescriptor classifier = context.scope.getClassifier(referencedName);
   if (classifier != null) {
     JetType classObjectType = classifier.getClassObjectType();
     if (classObjectType != null) {
       context.trace.record(REFERENCE_TARGET, expression, classifier);
       JetType result;
       if (context.expressionPosition == ExpressionPosition.LHS_OF_DOT
           && classifier instanceof ClassDescriptor) {
         JetScope scope =
             new ChainedScope(
                 classifier,
                 classObjectType.getMemberScope(),
                 getStaticNestedClassesScope((ClassDescriptor) classifier));
         result = new NamespaceType(referencedName, scope);
       } else if (context.expressionPosition == ExpressionPosition.LHS_OF_DOT
           || classifier.isClassObjectAValue()) {
         result = classObjectType;
       } else {
         context.trace.report(NO_CLASS_OBJECT.on(expression, classifier));
         result = null;
       }
       return DataFlowUtils.checkType(result, expression, context);
     }
   }
   JetType[] result = new JetType[1];
   TemporaryBindingTrace temporaryTrace =
       TemporaryBindingTrace.create(
           context.trace, "trace for namespace/class object lookup of name", referencedName);
   if (furtherNameLookup(expression, result, context.replaceBindingTrace(temporaryTrace))) {
     temporaryTrace.commit();
     return DataFlowUtils.checkType(result[0], expression, context);
   }
   // To report NO_CLASS_OBJECT when no namespace found
   if (classifier != null) {
     if (context.expressionPosition == ExpressionPosition.FREE) {
       context.trace.report(NO_CLASS_OBJECT.on(expression, classifier));
     }
     context.trace.record(REFERENCE_TARGET, expression, classifier);
     JetScope scopeForStaticMembersResolution =
         classifier instanceof ClassDescriptor
             ? getStaticNestedClassesScope((ClassDescriptor) classifier)
             : JetScope.EMPTY;
     return new NamespaceType(referencedName, scopeForStaticMembersResolution);
   }
   temporaryTrace.commit();
   return result[0];
 }
  @NotNull
  public TypeInfoForCall getCallExpressionTypeInfoForCallWithoutFinalTypeCheck(
      @NotNull JetCallExpression callExpression,
      @NotNull ReceiverValue receiver,
      @Nullable ASTNode callOperationNode,
      @NotNull ResolutionContext context,
      @NotNull ResolveMode resolveMode) {
    boolean[] result = new boolean[1];
    Call call = CallMaker.makeCall(receiver, callOperationNode, callExpression);

    TemporaryBindingTrace traceForFunction =
        TemporaryBindingTrace.create(
            context.trace, "trace to resolve as function call", callExpression);
    ResolvedCall<FunctionDescriptor> resolvedCall =
        getResolvedCallForFunction(
            call,
            callExpression,
            receiver,
            context.replaceBindingTrace(traceForFunction),
            resolveMode,
            result);
    if (result[0]) {
      FunctionDescriptor functionDescriptor =
          resolvedCall != null ? resolvedCall.getResultingDescriptor() : null;
      traceForFunction.commit();
      if (callExpression.getValueArgumentList() == null
          && callExpression.getFunctionLiteralArguments().isEmpty()) {
        // there are only type arguments
        boolean hasValueParameters =
            functionDescriptor == null || functionDescriptor.getValueParameters().size() > 0;
        context.trace.report(
            FUNCTION_CALL_EXPECTED.on(callExpression, callExpression, hasValueParameters));
      }
      if (functionDescriptor == null) {
        return TypeInfoForCall.create(null, context.dataFlowInfo);
      }
      JetType type = functionDescriptor.getReturnType();

      return TypeInfoForCall.create(
          type, resolvedCall.getDataFlowInfo(), resolvedCall, call, context, resolveMode);
    }

    JetExpression calleeExpression = callExpression.getCalleeExpression();
    if (calleeExpression instanceof JetSimpleNameExpression
        && callExpression.getTypeArgumentList() == null) {
      TemporaryBindingTrace traceForVariable =
          TemporaryBindingTrace.create(
              context.trace, "trace to resolve as variable with 'invoke' call", callExpression);
      JetType type =
          getVariableType(
              (JetSimpleNameExpression) calleeExpression,
              receiver,
              callOperationNode,
              context.replaceBindingTrace(traceForVariable),
              result);
      if (result[0]) {
        traceForVariable.commit();
        context.trace.report(
            FUNCTION_EXPECTED.on(
                (JetReferenceExpression) calleeExpression,
                calleeExpression,
                type != null ? type : ErrorUtils.createErrorType("")));
        return TypeInfoForCall.create(null, context.dataFlowInfo);
      }
    }
    traceForFunction.commit();
    return TypeInfoForCall.create(null, context.dataFlowInfo);
  }