Example #1
0
 @Nullable
 public static JetTypeInfo getRecordedTypeInfo(
     @NotNull JetExpression expression, @NotNull BindingContext context) {
   if (!context.get(BindingContext.PROCESSED, expression)) return null;
   DataFlowInfo dataFlowInfo = BindingContextUtilPackage.getDataFlowInfo(context, expression);
   JetType type = context.get(BindingContext.EXPRESSION_TYPE, expression);
   return JetTypeInfo.create(type, dataFlowInfo);
 }
  @NotNull
  @Override
  protected List<IntentionAction> doCreateActions(@NotNull Diagnostic diagnostic) {
    List<IntentionAction> actions = new LinkedList<IntentionAction>();

    BindingContext context = ResolutionUtils.analyzeFully((JetFile) diagnostic.getPsiFile());

    PsiElement diagnosticElement = diagnostic.getPsiElement();
    if (!(diagnosticElement instanceof JetExpression)) {
      LOG.error("Unexpected element: " + diagnosticElement.getText());
      return Collections.emptyList();
    }

    JetExpression expression = (JetExpression) diagnosticElement;

    JetType expectedType;
    JetType expressionType;
    if (diagnostic.getFactory() == Errors.TYPE_MISMATCH) {
      DiagnosticWithParameters2<JetExpression, JetType, JetType> diagnosticWithParameters =
          Errors.TYPE_MISMATCH.cast(diagnostic);
      expectedType = diagnosticWithParameters.getA();
      expressionType = diagnosticWithParameters.getB();
    } else if (diagnostic.getFactory() == Errors.NULL_FOR_NONNULL_TYPE) {
      DiagnosticWithParameters1<JetConstantExpression, JetType> diagnosticWithParameters =
          Errors.NULL_FOR_NONNULL_TYPE.cast(diagnostic);
      expectedType = diagnosticWithParameters.getA();
      expressionType = TypeUtilsKt.makeNullable(expectedType);
    } else if (diagnostic.getFactory() == Errors.CONSTANT_EXPECTED_TYPE_MISMATCH) {
      DiagnosticWithParameters2<JetConstantExpression, String, JetType> diagnosticWithParameters =
          Errors.CONSTANT_EXPECTED_TYPE_MISMATCH.cast(diagnostic);
      expectedType = diagnosticWithParameters.getB();
      expressionType = context.getType(expression);
      if (expressionType == null) {
        LOG.error("No type inferred: " + expression.getText());
        return Collections.emptyList();
      }
    } else {
      LOG.error("Unexpected diagnostic: " + DefaultErrorMessages.render(diagnostic));
      return Collections.emptyList();
    }

    // We don't want to cast a cast or type-asserted expression:
    if (!(expression instanceof JetBinaryExpressionWithTypeRHS)
        && !(expression.getParent() instanceof JetBinaryExpressionWithTypeRHS)) {
      actions.add(new CastExpressionFix(expression, expectedType));
    }

    // Property initializer type mismatch property type:
    JetProperty property = PsiTreeUtil.getParentOfType(expression, JetProperty.class);
    if (property != null) {
      JetPropertyAccessor getter = property.getGetter();
      JetExpression initializer = property.getInitializer();
      if (QuickFixUtil.canEvaluateTo(initializer, expression)
          || (getter != null
              && QuickFixUtil.canFunctionOrGetterReturnExpression(
                  property.getGetter(), expression))) {
        LexicalScope scope =
            CorePackage.getResolutionScope(
                property, context, ResolutionUtils.getResolutionFacade(property));
        JetType typeToInsert =
            TypeUtils.approximateWithResolvableType(expressionType, scope, false);
        actions.add(new ChangeVariableTypeFix(property, typeToInsert));
      }
    }

    PsiElement expressionParent = expression.getParent();

    // Mismatch in returned expression:

    JetCallableDeclaration function =
        expressionParent instanceof JetReturnExpression
            ? BindingContextUtilPackage.getTargetFunction(
                (JetReturnExpression) expressionParent, context)
            : PsiTreeUtil.getParentOfType(expression, JetFunction.class, true);
    if (function instanceof JetFunction
        && QuickFixUtil.canFunctionOrGetterReturnExpression(function, expression)) {
      LexicalScope scope =
          CorePackage.getResolutionScope(
              function, context, ResolutionUtils.getResolutionFacade(function));
      JetType typeToInsert = TypeUtils.approximateWithResolvableType(expressionType, scope, false);
      actions.add(new ChangeFunctionReturnTypeFix((JetFunction) function, typeToInsert));
    }

    // Fixing overloaded operators:
    if (expression instanceof JetOperationExpression) {
      ResolvedCall<?> resolvedCall = CallUtilPackage.getResolvedCall(expression, context);
      if (resolvedCall != null) {
        JetFunction declaration = getFunctionDeclaration(resolvedCall);
        if (declaration != null) {
          actions.add(new ChangeFunctionReturnTypeFix(declaration, expectedType));
        }
      }
    }

    // Change function return type when TYPE_MISMATCH is reported on call expression:
    if (expression instanceof JetCallExpression) {
      ResolvedCall<?> resolvedCall = CallUtilPackage.getResolvedCall(expression, context);
      if (resolvedCall != null) {
        JetFunction declaration = getFunctionDeclaration(resolvedCall);
        if (declaration != null) {
          actions.add(new ChangeFunctionReturnTypeFix(declaration, expectedType));
        }
      }
    }

    ResolvedCall<? extends CallableDescriptor> resolvedCall =
        CallUtilPackage.getParentResolvedCall(expression, context, true);
    if (resolvedCall != null) {
      // to fix 'type mismatch' on 'if' branches
      // todo: the same with 'when'
      JetExpression parentIf = QuickFixUtil.getParentIfForBranch(expression);
      JetExpression argumentExpression = (parentIf != null) ? parentIf : expression;
      ValueArgument valueArgument =
          CallUtilPackage.getValueArgumentForExpression(resolvedCall.getCall(), argumentExpression);
      if (valueArgument != null) {
        JetParameter correspondingParameter =
            QuickFixUtil.getParameterDeclarationForValueArgument(resolvedCall, valueArgument);
        JetType valueArgumentType =
            diagnostic.getFactory() == Errors.NULL_FOR_NONNULL_TYPE
                ? expressionType
                : context.getType(valueArgument.getArgumentExpression());
        if (correspondingParameter != null && valueArgumentType != null) {
          JetCallableDeclaration callable =
              PsiTreeUtil.getParentOfType(
                  correspondingParameter, JetCallableDeclaration.class, true);
          LexicalScope scope =
              callable != null
                  ? CorePackage.getResolutionScope(
                      callable, context, ResolutionUtils.getResolutionFacade(callable))
                  : null;
          JetType typeToInsert =
              TypeUtils.approximateWithResolvableType(valueArgumentType, scope, true);
          actions.add(new ChangeParameterTypeFix(correspondingParameter, typeToInsert));
        }
      }
    }
    return actions;
  }