private static JetScope getExpressionResolutionScope(
     @NotNull ResolveSession resolveSession, @NotNull JetExpression expression) {
   ScopeProvider provider = resolveSession.getInjector().getScopeProvider();
   JetDeclaration parentDeclaration =
       PsiTreeUtil.getParentOfType(expression, JetDeclaration.class);
   if (parentDeclaration == null) {
     return provider.getFileScopeWithAllImported((JetFile) expression.getContainingFile());
   }
   return provider.getResolutionScopeForDeclaration(parentDeclaration);
 }
  public static @NotNull BindingContext resolveToExpression(
      @NotNull final ResolveSession resolveSession, @NotNull JetExpression expression) {
    final DelegatingBindingTrace trace =
        new DelegatingBindingTrace(
            resolveSession.getBindingContext(), "trace to resolve expression", expression);
    JetFile file = (JetFile) expression.getContainingFile();

    @SuppressWarnings("unchecked")
    PsiElement topmostCandidateForAdditionalResolve =
        JetPsiUtil.getTopmostParentOfTypes(
            expression,
            JetNamedFunction.class,
            JetClassInitializer.class,
            JetProperty.class,
            JetDelegationSpecifierList.class);

    if (topmostCandidateForAdditionalResolve != null) {
      if (topmostCandidateForAdditionalResolve instanceof JetNamedFunction) {
        functionAdditionalResolve(
            resolveSession, (JetNamedFunction) topmostCandidateForAdditionalResolve, trace, file);
      } else if (topmostCandidateForAdditionalResolve instanceof JetClassInitializer) {
        initializerAdditionalResolve(
            resolveSession,
            (JetClassInitializer) topmostCandidateForAdditionalResolve,
            trace,
            file);
      } else if (topmostCandidateForAdditionalResolve instanceof JetProperty) {
        propertyAdditionalResolve(
            resolveSession, (JetProperty) topmostCandidateForAdditionalResolve, trace, file);
      } else if (topmostCandidateForAdditionalResolve instanceof JetDelegationSpecifierList) {
        delegationSpecifierAdditionalResolve(
            resolveSession,
            (JetDelegationSpecifierList) topmostCandidateForAdditionalResolve,
            trace,
            file);
      } else {
        assert false : "Invalid type of the topmost parent";
      }

      return trace.getBindingContext();
    }

    // Setup resolution scope explicitly
    if (trace.getBindingContext().get(BindingContext.RESOLUTION_SCOPE, expression) == null) {
      JetScope scope = getExpressionMemberScope(resolveSession, expression);
      if (scope != null) {
        trace.record(BindingContext.RESOLUTION_SCOPE, expression, scope);
      }
    }

    return trace.getBindingContext();
  }
 public static Collection<JetReturnExpression> collectReturns(@NotNull JetExpression expression) {
   Collection<JetReturnExpression> result = Lists.newArrayList();
   expression.accept(
       new JetTreeVisitor<Collection<JetReturnExpression>>() {
         @Override
         public Void visitReturnExpression(
             @NotNull JetReturnExpression expression, Collection<JetReturnExpression> data) {
           data.add(expression);
           return null;
         }
       },
       result);
   return result;
 }
  public static boolean isTypeFlexible(@Nullable JetExpression expression) {
    if (expression == null) return false;

    return TokenSet.create(JetNodeTypes.INTEGER_CONSTANT, JetNodeTypes.FLOAT_CONSTANT)
        .contains(expression.getNode().getElementType());
  }
  public static JetScope getExpressionMemberScope(
      @NotNull ResolveSession resolveSession, @NotNull JetExpression expression) {
    DelegatingBindingTrace trace =
        new DelegatingBindingTrace(
            resolveSession.getBindingContext(),
            "trace to resolve a member scope of expression",
            expression);

    if (expression instanceof JetReferenceExpression) {
      QualifiedExpressionResolver qualifiedExpressionResolver =
          resolveSession.getInjector().getQualifiedExpressionResolver();

      // In some type declaration
      if (expression.getParent() instanceof JetUserType) {
        JetUserType qualifier = ((JetUserType) expression.getParent()).getQualifier();
        if (qualifier != null) {
          Collection<? extends DeclarationDescriptor> descriptors =
              qualifiedExpressionResolver.lookupDescriptorsForUserType(
                  qualifier, getExpressionResolutionScope(resolveSession, expression), trace);

          for (DeclarationDescriptor descriptor : descriptors) {
            if (descriptor instanceof LazyPackageDescriptor) {
              return ((LazyPackageDescriptor) descriptor).getMemberScope();
            }
          }
        }
      }

      // Inside import
      if (PsiTreeUtil.getParentOfType(expression, JetImportDirective.class, false) != null) {
        NamespaceDescriptor rootPackage = resolveSession.getPackageDescriptorByFqName(FqName.ROOT);
        assert rootPackage != null;

        if (expression.getParent() instanceof JetDotQualifiedExpression) {
          JetExpression element =
              ((JetDotQualifiedExpression) expression.getParent()).getReceiverExpression();
          String name = ((JetFile) expression.getContainingFile()).getPackageName();

          NamespaceDescriptor filePackage =
              name != null
                  ? resolveSession.getPackageDescriptorByFqName(new FqName(name))
                  : rootPackage;
          assert filePackage != null : "File package should be already resolved and be found";

          JetScope scope = filePackage.getMemberScope();
          Collection<? extends DeclarationDescriptor> descriptors;

          if (element instanceof JetDotQualifiedExpression) {
            descriptors =
                qualifiedExpressionResolver.lookupDescriptorsForQualifiedExpression(
                    (JetDotQualifiedExpression) element,
                    rootPackage.getMemberScope(),
                    scope,
                    trace,
                    false,
                    false);
          } else {
            descriptors =
                qualifiedExpressionResolver.lookupDescriptorsForSimpleNameReference(
                    (JetSimpleNameExpression) element,
                    rootPackage.getMemberScope(),
                    scope,
                    trace,
                    false,
                    false,
                    false);
          }

          for (DeclarationDescriptor descriptor : descriptors) {
            if (descriptor instanceof NamespaceDescriptor) {
              return ((NamespaceDescriptor) descriptor).getMemberScope();
            }
          }
        } else {
          return rootPackage.getMemberScope();
        }
      }

      // Inside package declaration
      JetNamespaceHeader namespaceHeader =
          PsiTreeUtil.getParentOfType(expression, JetNamespaceHeader.class, false);
      if (namespaceHeader != null) {
        NamespaceDescriptor packageDescriptor =
            resolveSession.getPackageDescriptorByFqName(
                namespaceHeader.getParentFqName((JetReferenceExpression) expression));
        if (packageDescriptor != null) {
          return packageDescriptor.getMemberScope();
        }
      }
    }

    return null;
  }
Beispiel #6
0
  @NotNull
  /*package*/ OverloadResolutionResultsImpl<FunctionDescriptor> resolveFunctionCall(
      @NotNull BasicCallResolutionContext context) {

    ProgressIndicatorProvider.checkCanceled();

    List<ResolutionTask<CallableDescriptor, FunctionDescriptor>> prioritizedTasks;

    JetExpression calleeExpression = context.call.getCalleeExpression();
    JetReferenceExpression functionReference;
    if (calleeExpression instanceof JetSimpleNameExpression) {
      JetSimpleNameExpression expression = (JetSimpleNameExpression) calleeExpression;
      functionReference = expression;

      ExpressionTypingUtils.checkCapturingInClosure(expression, context.trace, context.scope);

      Name name = expression.getReferencedNameAsName();

      prioritizedTasks =
          TaskPrioritizer.<CallableDescriptor, FunctionDescriptor>computePrioritizedTasks(
              context,
              name,
              functionReference,
              CallableDescriptorCollectors.FUNCTIONS_AND_VARIABLES);
      ResolutionTask.DescriptorCheckStrategy abstractConstructorCheck =
          new ResolutionTask.DescriptorCheckStrategy() {
            @Override
            public <D extends CallableDescriptor> boolean performAdvancedChecks(
                D descriptor, BindingTrace trace, TracingStrategy tracing) {
              if (descriptor instanceof ConstructorDescriptor) {
                Modality modality =
                    ((ConstructorDescriptor) descriptor).getContainingDeclaration().getModality();
                if (modality == Modality.ABSTRACT) {
                  tracing.instantiationOfAbstractClass(trace);
                  return false;
                }
              }
              return true;
            }
          };
      for (ResolutionTask task : prioritizedTasks) {
        task.setCheckingStrategy(abstractConstructorCheck);
      }
    } else {
      JetValueArgumentList valueArgumentList = context.call.getValueArgumentList();
      PsiElement reportAbsenceOn =
          valueArgumentList == null ? context.call.getCallElement() : valueArgumentList;
      if (calleeExpression instanceof JetConstructorCalleeExpression) {
        assert !context.call.getExplicitReceiver().exists();

        JetConstructorCalleeExpression expression =
            (JetConstructorCalleeExpression) calleeExpression;
        functionReference = expression.getConstructorReferenceExpression();
        if (functionReference == null) {
          return checkArgumentTypesAndFail(context); // No type there
        }
        JetTypeReference typeReference = expression.getTypeReference();
        assert typeReference != null;
        JetType constructedType =
            typeResolver.resolveType(context.scope, typeReference, context.trace, true);

        if (constructedType.isError()) {
          return checkArgumentTypesAndFail(context);
        }

        DeclarationDescriptor declarationDescriptor =
            constructedType.getConstructor().getDeclarationDescriptor();
        if (declarationDescriptor instanceof ClassDescriptor) {
          ClassDescriptor classDescriptor = (ClassDescriptor) declarationDescriptor;
          Collection<ConstructorDescriptor> constructors = classDescriptor.getConstructors();
          if (constructors.isEmpty()) {
            context.trace.report(NO_CONSTRUCTOR.on(reportAbsenceOn));
            return checkArgumentTypesAndFail(context);
          }
          Collection<ResolutionCandidate<CallableDescriptor>> candidates =
              TaskPrioritizer.<CallableDescriptor>convertWithImpliedThis(
                  context.scope,
                  Collections.<ReceiverValue>singletonList(NO_RECEIVER),
                  constructors);
          prioritizedTasks =
              TaskPrioritizer
                  .<CallableDescriptor, FunctionDescriptor>computePrioritizedTasksFromCandidates(
                      context, functionReference, candidates, null);
        } else {
          context.trace.report(NOT_A_CLASS.on(calleeExpression));
          return checkArgumentTypesAndFail(context);
        }
      } else if (calleeExpression instanceof JetThisReferenceExpression) {
        functionReference = (JetThisReferenceExpression) calleeExpression;
        DeclarationDescriptor containingDeclaration = context.scope.getContainingDeclaration();
        if (containingDeclaration instanceof ConstructorDescriptor) {
          containingDeclaration = containingDeclaration.getContainingDeclaration();
        }
        assert containingDeclaration instanceof ClassDescriptor;
        ClassDescriptor classDescriptor = (ClassDescriptor) containingDeclaration;

        Collection<ConstructorDescriptor> constructors = classDescriptor.getConstructors();
        if (constructors.isEmpty()) {
          context.trace.report(NO_CONSTRUCTOR.on(reportAbsenceOn));
          return checkArgumentTypesAndFail(context);
        }
        List<ResolutionCandidate<CallableDescriptor>> candidates =
            ResolutionCandidate.<CallableDescriptor>convertCollection(
                constructors, JetPsiUtil.isSafeCall(context.call));
        prioritizedTasks =
            Collections.singletonList(
                new ResolutionTask<CallableDescriptor, FunctionDescriptor>(
                    candidates, functionReference, context)); // !! DataFlowInfo.EMPTY
      } else if (calleeExpression != null) {
        // Here we handle the case where the callee expression must be something of type function,
        // e.g. (foo.bar())(1, 2)
        JetType calleeType =
            expressionTypingServices.safeGetType(
                context.scope,
                calleeExpression,
                NO_EXPECTED_TYPE,
                context.dataFlowInfo,
                context
                    .trace); // We are actually expecting a function, but there seems to be no easy
                             // way of expressing this

        if (!KotlinBuiltIns.getInstance().isFunctionOrExtensionFunctionType(calleeType)) {
          //                    checkTypesWithNoCallee(trace, scope, call);
          if (!calleeType.isError()) {
            context.trace.report(CALLEE_NOT_A_FUNCTION.on(calleeExpression, calleeType));
          }
          return checkArgumentTypesAndFail(context);
        }

        FunctionDescriptorImpl functionDescriptor =
            new ExpressionAsFunctionDescriptor(
                context.scope.getContainingDeclaration(),
                Name.special("<for expression " + calleeExpression.getText() + ">"),
                calleeExpression);
        FunctionDescriptorUtil.initializeFromFunctionType(
            functionDescriptor,
            calleeType,
            NO_RECEIVER_PARAMETER,
            Modality.FINAL,
            Visibilities.LOCAL);
        ResolutionCandidate<CallableDescriptor> resolutionCandidate =
            ResolutionCandidate.<CallableDescriptor>create(
                functionDescriptor, JetPsiUtil.isSafeCall(context.call));
        resolutionCandidate.setReceiverArgument(context.call.getExplicitReceiver());
        resolutionCandidate.setExplicitReceiverKind(ExplicitReceiverKind.RECEIVER_ARGUMENT);

        // strictly speaking, this is a hack:
        // we need to pass a reference, but there's no reference in the PSI,
        // so we wrap what we have into a fake reference and pass it on (unwrap on the other end)
        functionReference = new JetFakeReference(calleeExpression);

        prioritizedTasks =
            Collections.singletonList(
                new ResolutionTask<CallableDescriptor, FunctionDescriptor>(
                    Collections.singleton(resolutionCandidate), functionReference, context));
      } else {
        //                checkTypesWithNoCallee(trace, scope, call);
        return checkArgumentTypesAndFail(context);
      }
    }

    return doResolveCallOrGetCachedResults(
        ResolutionResultsCache.FUNCTION_MEMBER_TYPE,
        context,
        prioritizedTasks,
        CallTransformer.FUNCTION_CALL_TRANSFORMER,
        functionReference);
  }