xref: /third_party/typescript/src/linter/ArkTSLinter_1_1/TypeScriptLinter.ts

/*
 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
 * 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.
 */

namespace ts {
export namespace ArkTSLinter_1_1 {

import FaultID = Problems.FaultID;
import faultsAttrs = Problems.faultsAttrs;

//import cookBookMsg = cookBookMsg;
//import cookBookTag = ts.cookBookTag;

//import LinterConfig = ts.LinterConfig;

import Autofix = Autofixer.Autofix;
//import Autofixer = ts.Autofixer;

import Logger = ts.perfLogger;

import LibraryTypeCallDiagnosticChecker =
      LibraryTypeCallDiagnosticCheckerNamespace.LibraryTypeCallDiagnosticChecker;

//const logger = Logger.getLogger();

export interface ProblemInfo {
  line: number;
  column: number;
  start: number;
  end: number;
  type: string;
  severity: number;
  problem: string;
  suggest: string;
  rule: string;
  ruleTag: number;
  autofixable: boolean;
  autofix?: Autofix[];
}

export class TypeScriptLinter {
  static ideMode: boolean;
  static strictMode: boolean;
  static logTscErrors: boolean;
  static warningsAsErrors: boolean;
  static lintEtsOnly: boolean;
  static totalVisitedNodes: number;
  static nodeCounters: number[];
  static lineCounters: number[];

  static totalErrorLines: number;
  static errorLineNumbersString: string;
  static totalWarningLines: number;
  static warningLineNumbersString: string;
  static reportDiagnostics = true;

  // The SyntaxKind enum defines additional elements at the end of the enum
  // that serve as markers (FirstX/LastX). Those elements are initialized
  // with indices of the previously defined elements. As result, the enum
  // may return incorrect name for a certain kind index (e.g. 'FirstStatement'
  // instead of 'VariableStatement').
  // The following code creates a map with correct syntax kind names.
  // It can be used when need to print name of syntax kind of certain
  // AST node in diagnostic messages.
  //private static tsSyntaxKindNames: string[];

  static problemsInfos: ProblemInfo[] = [];

  static filteredDiagnosticMessages: DiagnosticMessageChain[] = [];
  static sharedModulesCache: ESMap<string, boolean>;
  static strictDiagnosticCache: Set<Diagnostic>;
  static unknowDiagnosticCache: Set<Diagnostic>;

  public static initGlobals(): void {
    TypeScriptLinter.filteredDiagnosticMessages = []
    TypeScriptLinter.sharedModulesCache = new Map<string, boolean>();
    TypeScriptLinter.strictDiagnosticCache = new Set<Diagnostic>();
    TypeScriptLinter.unknowDiagnosticCache = new Set<Diagnostic>();
  }

  public static initStatic(): void {
    TypeScriptLinter.strictMode = true;
    TypeScriptLinter.logTscErrors = false;
    TypeScriptLinter.warningsAsErrors = false;
    TypeScriptLinter.lintEtsOnly = true;
    TypeScriptLinter.totalVisitedNodes = 0;
    TypeScriptLinter.nodeCounters = [];
    TypeScriptLinter.lineCounters = [];

    TypeScriptLinter.totalErrorLines = 0;
    TypeScriptLinter.totalWarningLines = 0;
    TypeScriptLinter.errorLineNumbersString = "";
    TypeScriptLinter.warningLineNumbersString = "";

    Autofixer.autofixInfo.length = 0;

    //TypeScriptLinter.tsSyntaxKindNames = [];
    //const keys = Object.keys(ts.SyntaxKind);
    //const keys: string[] = [];
    //const values = Object.values(ts.SyntaxKind);
    //const values: string[] = [];

    /*
    for (let i = 0; i < values.length; i++) {
      const val = values[i];
      const kindNum = typeof val === "string" ? parseInt(val) : val;
      if (kindNum && !TypeScriptLinter.tsSyntaxKindNames[kindNum])
        TypeScriptLinter.tsSyntaxKindNames[kindNum] = keys[i];
    }
    */

    for (let i = 0; i < FaultID.LAST_ID; i++) {
      TypeScriptLinter.nodeCounters[i] = 0;
      TypeScriptLinter.lineCounters[i] = 0;
    }

    TypeScriptLinter.problemsInfos = [];
  }

  public static tsTypeChecker: TypeChecker;

  currentErrorLine: number;
  currentWarningLine: number;
  staticBlocks: Set<string>;
  skipArkTSStaticBlocksCheck: boolean;
  private fileExportDeclCaches?: Set<ts.Node>;
  private compatibleSdkVersionStage: string = 'beta1';
  private compatibleSdkVersion: number = 12;

  constructor(private sourceFile: SourceFile,
              /* private */ tsProgram: Program,
              private tscStrictDiagnostics?: Map<Diagnostic[]>) {
    TypeScriptLinter.tsTypeChecker = tsProgram.getLinterTypeChecker();
    this.currentErrorLine = 0;
    this.currentWarningLine = 0;
    this.staticBlocks = new Set<string>();

    const options = tsProgram.getCompilerOptions();
    this.skipArkTSStaticBlocksCheck = false;
    if (options.skipArkTSStaticBlocksCheck) {
      this.skipArkTSStaticBlocksCheck = options.skipArkTSStaticBlocksCheck as boolean;
    }
    if (options.compatibleSdkVersion) {
      this.compatibleSdkVersion = options.compatibleSdkVersion;
    }
    if (options.compatibleSdkVersionStage) {
      this.compatibleSdkVersionStage = options.compatibleSdkVersionStage;
    }
  }

  public static clearTsTypeChecker(): void {
    TypeScriptLinter.tsTypeChecker = {} as TypeChecker;
  }

  readonly handlersMap = new Map([
    [SyntaxKind.ObjectLiteralExpression, this.handleObjectLiteralExpression],
    [SyntaxKind.ArrayLiteralExpression, this.handleArrayLiteralExpression],
    [SyntaxKind.Parameter, this.handleParameter],
    [SyntaxKind.EnumDeclaration, this.handleEnumDeclaration],
    [SyntaxKind.InterfaceDeclaration, this.handleInterfaceDeclaration],
    [SyntaxKind.ThrowStatement, this.handleThrowStatement], [SyntaxKind.ImportClause, this.handleImportClause],
    [SyntaxKind.ForStatement, this.handleForStatement],
    [SyntaxKind.ForInStatement, this.handleForInStatement],
    [SyntaxKind.ForOfStatement, this.handleForOfStatement],
    [SyntaxKind.ImportDeclaration, this.handleImportDeclaration],
    [SyntaxKind.PropertyAccessExpression, this.handlePropertyAccessExpression],
    [SyntaxKind.PropertyDeclaration, this.handlePropertyDeclaration],
    [SyntaxKind.PropertyAssignment, this.handlePropertyAssignment],
    [SyntaxKind.PropertySignature, this.handlePropertySignature],
    [SyntaxKind.FunctionExpression, this.handleFunctionExpression],
    [SyntaxKind.ArrowFunction, this.handleArrowFunction],
    [SyntaxKind.CatchClause, this.handleCatchClause],
    [SyntaxKind.FunctionDeclaration, this.handleFunctionDeclaration],
    [SyntaxKind.PrefixUnaryExpression, this.handlePrefixUnaryExpression],
    [SyntaxKind.BinaryExpression, this.handleBinaryExpression],
    [SyntaxKind.VariableDeclarationList, this.handleVariableDeclarationList],
    [SyntaxKind.VariableDeclaration, this.handleVariableDeclaration],
    [SyntaxKind.ClassDeclaration, this.handleClassDeclaration],
    [SyntaxKind.ModuleDeclaration, this.handleModuleDeclaration],
    [SyntaxKind.TypeAliasDeclaration, this.handleTypeAliasDeclaration],
    [SyntaxKind.ImportSpecifier, this.handleImportSpecifier],
    [SyntaxKind.NamespaceImport, this.handleNamespaceImport],
    [SyntaxKind.TypeAssertionExpression, this.handleTypeAssertionExpression],
    [SyntaxKind.MethodDeclaration, this.handleMethodDeclaration],
    [SyntaxKind.MethodSignature, this.handleMethodSignature],
    [SyntaxKind.Identifier, this.handleIdentifier],
    [SyntaxKind.ElementAccessExpression, this.handleElementAccessExpression],
    [SyntaxKind.EnumMember, this.handleEnumMember], [SyntaxKind.TypeReference, this.handleTypeReference],
    [SyntaxKind.ExportAssignment, this.handleExportAssignment],
    [SyntaxKind.CallExpression, this.handleCallExpression], [SyntaxKind.MetaProperty, this.handleMetaProperty],
    [SyntaxKind.NewExpression, this.handleNewExpression], [SyntaxKind.AsExpression, this.handleAsExpression],
    [SyntaxKind.SpreadElement, this.handleSpreadOp], [SyntaxKind.SpreadAssignment, this.handleSpreadOp],
    [SyntaxKind.GetAccessor, this.handleGetAccessor], [SyntaxKind.SetAccessor, this.handleSetAccessor],
    [SyntaxKind.ConstructSignature, this.handleConstructSignature],
    [SyntaxKind.ExpressionWithTypeArguments, this.handleExpressionWithTypeArguments],
    [SyntaxKind.ComputedPropertyName, this.handleComputedPropertyName],
    [SyntaxKind.EtsComponentExpression, this.handleEtsComponentExpression],
    [SyntaxKind.ClassStaticBlockDeclaration, this.handleClassStaticBlockDeclaration],
    [ts.SyntaxKind.IndexSignature, this.handleIndexSignature],
    [ts.SyntaxKind.ExportKeyword, this.handleExportKeyword],
    [ts.SyntaxKind.ExportDeclaration, this.handleExportDeclaration],
    [ts.SyntaxKind.ReturnStatement, this.handleReturnStatement],
    [ts.SyntaxKind.Decorator, this.handleDecorator]
  ]);

  public incrementCounters(node: Node | CommentRange, faultId: number, autofixable = false, autofix?: Autofix[]): void {
    if (!TypeScriptLinter.strictMode && faultsAttrs[faultId].migratable) { return; } // In relax mode skip migratable

    const [startOffset, endOffset] = Utils.getHighlightRange(node, faultId);
    const startPos = this.sourceFile!.getLineAndCharacterOfPosition(startOffset);
    const line = startPos.line + 1;
    const character = startPos.character + 1;

    TypeScriptLinter.nodeCounters[faultId]++;

    const faultDescr = LinterConfig.nodeDesc[faultId];
    const faultType = "unknown"; //TypeScriptLinter.tsSyntaxKindNames[node.kind];

    const cookBookMsgNum = faultsAttrs[faultId] ? faultsAttrs[faultId].cookBookRef : 0;
    const cookBookTg = cookBookTag[cookBookMsgNum];
    const severity = faultsAttrs[faultId]?.severity ?? Common.ProblemSeverity.ERROR;
    const badNodeInfo: ProblemInfo = {
      line: line,
      column: character,
      start: startOffset,
      end: endOffset,
      type: faultType,
      severity: severity,
      problem: FaultID[faultId],
      suggest: cookBookMsgNum > 0 ? cookBookMsg[cookBookMsgNum] : "",
      rule: cookBookMsgNum > 0 && cookBookTg !== "" ? cookBookTg : faultDescr ? faultDescr : faultType,
      ruleTag: cookBookMsgNum,
      autofixable: autofixable,
      autofix: autofix
    };

    TypeScriptLinter.problemsInfos.push(badNodeInfo);

    if (!TypeScriptLinter.reportDiagnostics) {
      //logger.info(
      Logger.logEvent(
        `Warning: ${this.sourceFile.fileName} (${line}, ${character}): ${faultDescr ? faultDescr : faultType}`
      );
    }

    TypeScriptLinter.lineCounters[faultId]++;

    switch (faultsAttrs[faultId].severity) {
      case Common.ProblemSeverity.ERROR: {
        this.currentErrorLine = line;
        ++TypeScriptLinter.totalErrorLines;
        TypeScriptLinter.errorLineNumbersString += line + ', ';
        break;
      }
      case Common.ProblemSeverity.WARNING: {
        if (line === this.currentWarningLine) {
          break;
        }
        this.currentWarningLine = line;
        ++TypeScriptLinter.totalWarningLines;
        TypeScriptLinter.warningLineNumbersString += line + ', ';
        break;
      }
    }
  }

  private forEachNodeInSubtree(node: ts.Node, cb: (n: ts.Node) => void, stopCond?: (n: ts.Node) => boolean): void {
    cb.call(this, node);
    if (stopCond?.call(this, node)) {
      return;
    }
    ts.forEachChild(node, (child) => {
      this.forEachNodeInSubtree(child, cb, stopCond);
    });
  }

  private visitSourceFile(sf: ts.SourceFile): void {
    const callback = (node: ts.Node): void => {
      TypeScriptLinter.totalVisitedNodes++;
      const incrementedType = LinterConfig.incrementOnlyTokens.get(node.kind);
      if (incrementedType !== undefined) {
        this.incrementCounters(node, incrementedType);
      }
      else {
        const handler = this.handlersMap.get(node.kind);
        if (handler !== undefined) {
          handler.call(this, node);
        }
      }
    };
    const stopCondition = (node: ts.Node): boolean => {
      if (node === null || node.kind === null) {
        return true;
      }
      // Skip synthetic constructor in Struct declaration.
      if (node.parent && Utils.isStructDeclaration(node.parent) && ts.isConstructorDeclaration(node)) {
        return true;
      }
      if (LinterConfig.terminalTokens.has(node.kind)) {
        return true;
      }
      return false;
    };
    this.forEachNodeInSubtree(sf, callback, stopCondition);
  }

  private countInterfaceExtendsDifferentPropertyTypes(
    node: Node,
    prop2type: Map<string /*, string*/>,
    propName: string,
    type: TypeNode | undefined
  ): void {
    if (type) {
      const methodType = type.getText();
      const propType = prop2type.get(propName);
      if (!propType) {
        prop2type.set(propName, methodType);
      }
      else if (propType !== methodType) {
        this.incrementCounters(node, FaultID.IntefaceExtendDifProps);
      }
    }
  }

  private countDeclarationsWithDuplicateName(
    tsNode: Node, tsDeclNode: Node, tsDeclKind?: SyntaxKind
  ): void {
    const symbol = TypeScriptLinter.tsTypeChecker.getSymbolAtLocation(tsNode);

    // If specific declaration kind is provided, check against it.
    // Otherwise, use syntax kind of corresponding declaration node.
    if (!!symbol && Utils.symbolHasDuplicateName(symbol, tsDeclKind ?? tsDeclNode.kind)) {
      this.incrementCounters(tsDeclNode, FaultID.DeclWithDuplicateName);
    }
  }

  private countClassMembersWithDuplicateName(tsClassDecl: ClassDeclaration): void {
    for (const tsCurrentMember of tsClassDecl.members) {
      if (
        !tsCurrentMember.name ||
        !(isIdentifier(tsCurrentMember.name) || isPrivateIdentifier(tsCurrentMember.name))
      ) {
        continue;
      }
      for (const tsClassMember of tsClassDecl.members) {
        if (tsCurrentMember === tsClassMember) continue;

        if (
          !tsClassMember.name ||
          !(isIdentifier(tsClassMember.name) || isPrivateIdentifier(tsClassMember.name))
        ) {
          continue;
        }
        if (
          isIdentifier(tsCurrentMember.name) &&
          isPrivateIdentifier(tsClassMember.name) &&
          tsCurrentMember.name.text === tsClassMember.name.text.substring(1)
        ) {
          this.incrementCounters(tsCurrentMember, FaultID.DeclWithDuplicateName);
          break;
        }

        if (
          isPrivateIdentifier(tsCurrentMember.name) &&
          isIdentifier(tsClassMember.name) &&
          tsCurrentMember.name.text.substring(1) === tsClassMember.name.text
        ) {
          this.incrementCounters(tsCurrentMember, FaultID.DeclWithDuplicateName);
          break;
        }
      }
    }
  }

  private static scopeContainsThis(tsNode: ts.Expression | ts.Block): boolean {
    function scopeContainsThisVisitor(tsNode: ts.Node): boolean {
      if (tsNode.kind === SyntaxKind.ThisKeyword) {
        return true;
      }

      // Visit children nodes. Skip any local declaration that defines
      // its own scope as it needs to be checked separately.
      const isClassLike = ts.isClassDeclaration(tsNode) || ts.isClassExpression(tsNode);
      const isFunctionLike = ts.isFunctionDeclaration(tsNode) || ts.isFunctionExpression(tsNode);
      const isModuleDecl = ts.isModuleDeclaration(tsNode);
      if (isClassLike || isFunctionLike || isModuleDecl) {
        return false;
      }

      const isContain = forEachChild(tsNode, (child) => {
        if (scopeContainsThisVisitor(child)) {
          return true;
        }
        return undefined;
      });
      return !!isContain;
    }

    return scopeContainsThisVisitor(tsNode);
  }

  private isPrototypePropertyAccess(tsPropertyAccess: ts.PropertyAccessExpression, propAccessSym: ts.Symbol | undefined, baseExprSym: ts.Symbol | undefined, baseExprType: ts.Type): boolean {
    if (!(isIdentifier(tsPropertyAccess.name) && tsPropertyAccess.name.text === "prototype")) {
      return false;
    }
    // #13600: Relax prototype check when expression comes from interop.
    let curPropAccess: Node = tsPropertyAccess;
    while (curPropAccess && isPropertyAccessExpression(curPropAccess)) {
      const baseExprSym = Utils.trueSymbolAtLocation(curPropAccess.expression);
      if (Utils.isLibrarySymbol(baseExprSym)) {
        return false;
      }
      curPropAccess = curPropAccess.expression;
    }
    if (ts.isIdentifier(curPropAccess) && curPropAccess.text !== 'prototype') {
      const type = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(curPropAccess);
      if (Utils.isAnyType(type)) {
        return false;
      }
    }
    // Check if property symbol is "Prototype"
    if (Utils.isPrototypeSymbol(propAccessSym)) return true;

    // Check if symbol of LHS-expression is Class or Function.
    if (Utils.isTypeSymbol(baseExprSym) || Utils.isFunctionSymbol(baseExprSym)) {
      return true;
    }
    // Check if type of LHS expression Function type or Any type.
    // The latter check is to cover cases with multiple prototype
    // chain (as the 'Prototype' property should be 'Any' type):
    //      X.prototype.prototype.prototype = ...
    const baseExprTypeNode = TypeScriptLinter.tsTypeChecker.typeToTypeNode(
      baseExprType, undefined, NodeBuilderFlags.None
    );

    return ((baseExprTypeNode && isFunctionTypeNode(baseExprTypeNode)) || Utils.isAnyType(baseExprType));
  }

  private interfaceInheritanceLint(node: Node, heritageClauses: NodeArray<HeritageClause>): void {
    for (const hClause of heritageClauses) {
      if (hClause.token !== SyntaxKind.ExtendsKeyword) continue;

      const prop2type = new Map<string, string>();
      for (const tsTypeExpr of hClause.types) {
        const tsExprType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsTypeExpr.expression);
        if (tsExprType.isClass()) {
          this.incrementCounters(tsTypeExpr, FaultID.InterfaceExtendsClass);
        }
        else if (tsExprType.isClassOrInterface()) {
          this.lintForInterfaceExtendsDifferentPorpertyTypes(node, tsExprType, prop2type);
        }
      }
    }
  }

  private lintForInterfaceExtendsDifferentPorpertyTypes(
    node: Node, tsExprType: Type, prop2type: Map</*string,*/ string>
  ): void {
    const props = tsExprType.getProperties();
    for (const p of props) {
      if (!p.declarations) continue;

      const decl: Declaration = p.declarations[0];
      if (decl.kind === SyntaxKind.MethodSignature) {
        this.countInterfaceExtendsDifferentPropertyTypes(
          node, prop2type, p.name, (decl as MethodSignature).type
        );
      }
      else if (decl.kind === SyntaxKind.MethodDeclaration) {
        this.countInterfaceExtendsDifferentPropertyTypes(
          node, prop2type, p.name, (decl as MethodDeclaration).type
        );
      }
      else if (decl.kind === SyntaxKind.PropertyDeclaration) {
        this.countInterfaceExtendsDifferentPropertyTypes(
          node, prop2type, p.name, (decl as PropertyDeclaration).type
        );
      }
      else if (decl.kind === SyntaxKind.PropertySignature) {
        this.countInterfaceExtendsDifferentPropertyTypes(
          node, prop2type, p.name, (decl as PropertySignature).type
        );
      }
    }
  }

  private handleObjectLiteralExpression(node: Node): void {
    const objectLiteralExpr = node as ObjectLiteralExpression;

    // If object literal is a part of destructuring assignment, then don't process it further.
    if (Utils.isDestructuringAssignmentLHS(objectLiteralExpr)) {
      return;
    }
    const objectLiteralType = TypeScriptLinter.tsTypeChecker.getContextualType(objectLiteralExpr);
    if (objectLiteralType && Utils.typeContainsSendableClassOrInterface(objectLiteralType)) {
      this.incrementCounters(node, FaultID.SendableObjectInitialization);
    } else if (
      // issue 13082: Allow initializing struct instances with object literal.
      !Utils.isStructObjectInitializer(objectLiteralExpr) &&
      !Utils.isDynamicLiteralInitializer(objectLiteralExpr) &&
      !Utils.isObjectLiteralAssignable(objectLiteralType, objectLiteralExpr)
    ) {
      this.incrementCounters(node, FaultID.ObjectLiteralNoContextType);
    }
  }

  private handleArrayLiteralExpression(node: Node): void {
    // If array literal is a part of destructuring assignment, then
    // don't process it further.
    if (Utils.isDestructuringAssignmentLHS(node as ArrayLiteralExpression)) return;

    const arrayLitNode = node as ArrayLiteralExpression;
    let noContextTypeForArrayLiteral = false;

    const arrayLitType = TypeScriptLinter.tsTypeChecker.getContextualType(arrayLitNode);
    if (arrayLitType && Utils.typeContainsSendableClassOrInterface(arrayLitType)) {
      this.incrementCounters(node, FaultID.SendableObjectInitialization);
      return;
    }

    // check that array literal consists of inferrable types
    // e.g. there is no element which is untyped object literals
    const arrayLitElements = arrayLitNode.elements;
    for(const element of arrayLitElements) {
      const elementContextType = TypeScriptLinter.tsTypeChecker.getContextualType(element);
      if(element.kind === SyntaxKind.ObjectLiteralExpression) {
        if (!Utils.isDynamicLiteralInitializer(arrayLitNode) &&
            !Utils.isObjectLiteralAssignable(elementContextType, element as ts.ObjectLiteralExpression)) {
          noContextTypeForArrayLiteral = true;
          break;
        }
      }
      if (elementContextType) {
        this.checkAssignmentMatching(element, elementContextType, element, true);
      }
    }

    if (noContextTypeForArrayLiteral) {
      this.incrementCounters(node, FaultID.ArrayLiteralNoContextType);
    }
  }

  private handleParameter(node: Node): void {
    const tsParam = node as ParameterDeclaration;

    Utils.getDecoratorsIfInSendableClass(tsParam)?.forEach((decorator) => {
      this.incrementCounters(decorator, FaultID.SendableClassDecorator);
    });

    if (isArrayBindingPattern(tsParam.name) || isObjectBindingPattern(tsParam.name)) {
      this.incrementCounters(node, FaultID.DestructuringParameter);
    }
    const tsParamMods = ts.getModifiers(tsParam); //tsParam.modifiers;
    if (
      tsParamMods &&
      (Utils.hasModifier(tsParamMods, SyntaxKind.PublicKeyword) ||
        Utils.hasModifier(tsParamMods, SyntaxKind.ProtectedKeyword) ||
        Utils.hasModifier(tsParamMods, SyntaxKind.ReadonlyKeyword) ||
        Utils.hasModifier(tsParamMods, SyntaxKind.PrivateKeyword))
    ) {
      this.incrementCounters(node, FaultID.ParameterProperties);
    }

    this.handleDeclarationInferredType(tsParam);
  }

  private handleEnumDeclaration(node: Node): void {
    const enumNode = node as EnumDeclaration;
    this.countDeclarationsWithDuplicateName(enumNode.name, enumNode);

    const enumSymbol = Utils.trueSymbolAtLocation(enumNode.name);
    if (!enumSymbol) return;

    const enumDecls = enumSymbol.getDeclarations();
    if (!enumDecls) return;

    // Since type checker merges all declarations with the same name
    // into one symbol, we need to check that there's more than one
    // enum declaration related to that specific symbol.
    // See 'countDeclarationsWithDuplicateName' method for details.
    let enumDeclCount = 0;
    for (const decl of enumDecls) {
      if (decl.kind === SyntaxKind.EnumDeclaration) enumDeclCount++;
    }

    if (enumDeclCount > 1) this.incrementCounters(node, FaultID.EnumMerging);
  }

  private handleInterfaceDeclaration(node: Node): void {
    const interfaceNode = node as InterfaceDeclaration;
    const iSymbol = Utils.trueSymbolAtLocation(interfaceNode.name);
    const iDecls = iSymbol ? iSymbol.getDeclarations() : null;
    if (iDecls) {
      // Since type checker merges all declarations with the same name
      // into one symbol, we need to check that there's more than one
      // interface declaration related to that specific symbol.
      // See 'countDeclarationsWithDuplicateName' method for details.
      let iDeclCount = 0;
      for (const decl of iDecls) {
        if (decl.kind === SyntaxKind.InterfaceDeclaration) iDeclCount++;
      }

      if (iDeclCount > 1) this.incrementCounters(node, FaultID.InterfaceMerging);
    }

    if (interfaceNode.heritageClauses) this.interfaceInheritanceLint(node, interfaceNode.heritageClauses);

    this.countDeclarationsWithDuplicateName(interfaceNode.name, interfaceNode);
  }

  private handleThrowStatement(node: Node): void {
    const throwStmt = node as ThrowStatement;
    const throwExprType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(throwStmt.expression);
    if (!throwExprType.isClassOrInterface() || !Utils.isOrDerivedFrom(throwExprType, Utils.isStdErrorType)) {
      this.incrementCounters(node, FaultID.ThrowStatement);
    }
  }

  private handleForStatement(node: Node): void {
    const tsForStmt = node as ForStatement;
    const tsForInit = tsForStmt.initializer;
    if (tsForInit && (isArrayLiteralExpression(tsForInit) || isObjectLiteralExpression(tsForInit))) {
      this.incrementCounters(tsForInit, FaultID.DestructuringAssignment);
    }
  }

  private handleForInStatement(node: Node): void {
    const tsForInStmt = node as ForInStatement;
    const tsForInInit = tsForInStmt.initializer;
    if (isArrayLiteralExpression(tsForInInit) || isObjectLiteralExpression(tsForInInit)) {
      this.incrementCounters(tsForInInit, FaultID.DestructuringAssignment);
    }
    this.incrementCounters(node, FaultID.ForInStatement);
  }

  private handleForOfStatement(node: Node): void {
    const tsForOfStmt = node as ForOfStatement;
    const tsForOfInit = tsForOfStmt.initializer;
    if (isArrayLiteralExpression(tsForOfInit) || isObjectLiteralExpression(tsForOfInit)) {
      this.incrementCounters(tsForOfInit, FaultID.DestructuringAssignment);
    }
  }

  private handleImportDeclaration(node: Node): void {
    const importDeclNode = node as ImportDeclaration;
    for (const stmt of importDeclNode.parent.statements) {
      if (stmt === importDeclNode) {
        break;
      }
      if (!isImportDeclaration(stmt)) {
        this.incrementCounters(node, FaultID.ImportAfterStatement);
        break;
      }
    }

    const expr1 = importDeclNode.moduleSpecifier;
    if (expr1.kind === ts.SyntaxKind.StringLiteral) {
      if (importDeclNode.assertClause) {
        this.incrementCounters(importDeclNode.assertClause, FaultID.ImportAssertion);
      }
    }

      //handle no side effect import in sendable module
      this.handleSharedModuleNoSideEffectImport(importDeclNode);
  }


  private handleSharedModuleNoSideEffectImport(node : ts.ImportDeclaration): void {
    //check 'use shared'
    if (TypeScriptLinter.inSharedModule(node) && !node.importClause) {
      this.incrementCounters(node, FaultID.SharedNoSideEffectImport);
    }
  }

  private static inSharedModule(node: ts.Node): boolean {
    const sourceFile: ts.SourceFile = node.getSourceFile();
    const modulePath = normalizePath(sourceFile.fileName);
    if (TypeScriptLinter.sharedModulesCache.has(modulePath)) {
      return TypeScriptLinter.sharedModulesCache.get(modulePath)!;
    }
    const isSharedModule: boolean = Utils.isSharedModule(sourceFile);
    TypeScriptLinter.sharedModulesCache.set(modulePath, isSharedModule);
    return isSharedModule;
  }

  private handlePropertyAccessExpression(node: Node): void {
    if (ts.isCallExpression(node.parent) && node == node.parent.expression) {
      return;
    }

    const propertyAccessNode = node as PropertyAccessExpression;
    const exprSym = Utils.trueSymbolAtLocation(propertyAccessNode);
    const baseExprSym = Utils.trueSymbolAtLocation(propertyAccessNode.expression);
    const baseExprType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(propertyAccessNode.expression);
    if (this.isPrototypePropertyAccess(propertyAccessNode, exprSym, baseExprSym, baseExprType)) {
      this.incrementCounters(propertyAccessNode.name, FaultID.Prototype);
    }
    if (!!exprSym && Utils.isSymbolAPI(exprSym) && !Utils.ALLOWED_STD_SYMBOL_API.includes(exprSym.getName())) {
      this.incrementCounters(propertyAccessNode, FaultID.SymbolType);
    }
    if (!!baseExprSym && Utils.symbolHasEsObjectType(baseExprSym)) {
      this.incrementCounters(propertyAccessNode, FaultID.EsObjectType);
    }
    if (Utils.isSendableFunction(baseExprType) || Utils.hasSendableTypeAlias(baseExprType)) {
      this.incrementCounters(propertyAccessNode, FaultID.SendableFunctionProperty);
    }
  }

  private handlePropertyDeclaration(node: ts.PropertyDeclaration) {
    const propName = node.name;
    if (!!propName && ts.isNumericLiteral(propName)) {
      let autofix: Autofix[] | undefined = Autofixer.fixLiteralAsPropertyName(node);
      const autofixable = autofix !== undefined;
      if (!Autofixer.shouldAutofix(node, FaultID.LiteralAsPropertyName)) {
        autofix = undefined;
      }
      this.incrementCounters(node.name, FaultID.LiteralAsPropertyName, autofixable, autofix);
    }
    const decorators = ts.getDecorators(node);
    this.filterOutDecoratorsDiagnostics(decorators, Utils.NON_INITIALIZABLE_PROPERTY_DECORATORS,
      {begin: propName.getStart(), end: propName.getStart()},
      Utils.PROPERTY_HAS_NO_INITIALIZER_ERROR_CODE);

    const classDecorators = ts.getDecorators(node.parent);
    const propType = (node as ts.PropertyDeclaration).type?.getText();
    this.filterOutDecoratorsDiagnostics(classDecorators, Utils.NON_INITIALIZABLE_PROPERTY_CLASS_DECORATORS,
      {begin: propName.getStart(), end: propName.getStart()}, Utils.PROPERTY_HAS_NO_INITIALIZER_ERROR_CODE, propType);
    if (node.type && node.initializer) {
      this.checkAssignmentMatching(node, TypeScriptLinter.tsTypeChecker.getTypeAtLocation(node.type), node.initializer, true);
    }
    this.handleDeclarationInferredType(node);
    this.handleDefiniteAssignmentAssertion(node);
    this.handleSendableClassProperty(node);
  }

  private handleSendableClassProperty(node: ts.PropertyDeclaration): void {
    const classNode = node.parent;
    if (!ts.isClassDeclaration(classNode) || !Utils.hasSendableDecorator(classNode)) {
      return;
    }
    const typeNode = node.type;
    if (!typeNode) {
      this.incrementCounters(node, FaultID.SendableExplicitFieldType);
      return;
    }
    Utils.getDecoratorsIfInSendableClass(node)?.forEach((decorator) => {
      this.incrementCounters(decorator, FaultID.SendableClassDecorator);
    });
    if (!Utils.isSendableTypeNode(typeNode)) {
      this.incrementCounters(node, FaultID.SendablePropType);
    } else {
      this.checkTypeAliasInSendableScope(node);
    }
  }

  private checkTypeAliasInSendableScope(node: ts.PropertyDeclaration | ts.PropertySignature): void {
    if (!node.type) {
      return;
    }

    const typeNode = Utils.unwrapParenthesizedTypeNode(node.type);
    const needWarning =
    (ts.isUnionTypeNode(typeNode) && typeNode.types.some((elemType) => this.isNoneSendableTypeAlias(elemType))) ||
    (ts.isTypeReferenceNode(typeNode) && this.isNoneSendableTypeAlias(typeNode));

    if (needWarning) {
      this.incrementCounters(node.type, FaultID.SendablePropTypeWarning);
    }
  }

  private isNoneSendableTypeAlias(typeNode: TypeNode): boolean {
    if (!ts.isTypeReferenceNode(typeNode)) {
      return false;
    }

    const sym = Utils.trueSymbolAtLocation(typeNode.typeName);
    if (!sym || !(sym.getFlags() & ts.SymbolFlags.TypeAlias)) {
      return false;
    }

    const typeDecl = Utils.getDeclaration(sym);
    if (!typeDecl || !ts.isTypeAliasDeclaration(typeDecl)) {
      return false;
    }

    const typeArgs = typeNode.typeArguments;

    if (typeArgs && !typeArgs.every((typeArg) => Utils.isSendableTypeNode(typeArg))) {
      return true;
    }
    return false;
  }

  private handlePropertyAssignment(node: ts.PropertyAssignment) {
    const propName = node.name;
    if (!(!!propName && ts.isNumericLiteral(propName))) {
      return;
    }

    /*
     * We can use literals as property names only when creating Record or any interop instances.
     * We can also initialize with constant string literals.
     * Assignment with string enum values is handled in handleComputedPropertyName
     */
    let isRecordObjectInitializer = false;
    let isLibraryType = false;
    let isDynamic = false;
    const objectLiteralType = TypeScriptLinter.tsTypeChecker.getContextualType(node.parent);
    if (objectLiteralType) {
      isRecordObjectInitializer = Utils.checkTypeSet(objectLiteralType, Utils.isStdRecordType);
      isLibraryType = Utils.isLibraryType(objectLiteralType);
    }

    isDynamic = isLibraryType || Utils.isDynamicLiteralInitializer(node.parent);
    if (!isRecordObjectInitializer && !isDynamic) {
      let autofix: Autofix[] | undefined = Autofixer.fixLiteralAsPropertyName(node);
      let autofixable = autofix != undefined;
      if (!Autofixer.shouldAutofix(node, FaultID.LiteralAsPropertyName)) {
        autofix = undefined;
      }
      this.incrementCounters(node.name, FaultID.LiteralAsPropertyName, autofixable, autofix);
    }
  }

  private handlePropertySignature(node: ts.PropertySignature): void {
    const propName = node.name;
    if (!!propName && ts.isNumericLiteral(propName)) {
      let autofix: Autofix[] | undefined = Autofixer.fixLiteralAsPropertyName(node);
      const autofixable = autofix !== undefined;
      if (!Autofixer.shouldAutofix(node, FaultID.LiteralAsPropertyName)) {
        autofix = undefined;
      }
      this.incrementCounters(node.name, FaultID.LiteralAsPropertyName, autofixable, autofix);
    }
    this.handleSendableInterfaceProperty(node);
  }

  private handleSendableInterfaceProperty(node: ts.PropertySignature): void {
    const typeNode = node.type;
    if (!typeNode) {
      return;
    }
    const interfaceNode = node.parent;
    const interfaceNodeType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(interfaceNode);
    if (!ts.isInterfaceDeclaration(interfaceNode) || !Utils.isSendableClassOrInterface(interfaceNodeType)) {
      return;
    }
    if (!Utils.isSendableTypeNode(typeNode)) {
      this.incrementCounters(node, FaultID.SendablePropType);
    } else {
      this.checkTypeAliasInSendableScope(node);
    }
  }

  private filterOutDecoratorsDiagnostics(decorators: readonly Decorator[] | undefined,
    expectedDecorators: readonly string[],
    range: { begin: number, end: number},
    code: number,
    prop_type?: string) {
    // Filter out non-initializable property decorators from strict diagnostics.
    if (this.tscStrictDiagnostics && this.sourceFile) {
      if (decorators?.some((decorator) => {
        const decoratorName = Utils.getDecoratorName(decorator);
        // special case for property of type CustomDialogController of the @CustomDialog-decorated class
        if (expectedDecorators.includes(Utils.NON_INITIALIZABLE_PROPERTY_CLASS_DECORATORS[0])) {
          return expectedDecorators.includes(decoratorName) && prop_type === 'CustomDialogController';
        }
        //return Utils.NON_INITIALIZABLE_PROPERTY_DECORATORS.includes(decoratorName);
        return expectedDecorators.includes(decoratorName);
      })) {
        const file = normalizePath(this.sourceFile.fileName);
        const tscDiagnostics = this.tscStrictDiagnostics.get(file);
        if (tscDiagnostics) {
          const filteredDiagnostics = tscDiagnostics.filter(
            (val /*, idx, array */) => {
              if (val.code !== code) return true;
              if (val.start === undefined) return true;
              if (val.start < range.begin) return true;
              if (val.start > range.end) return true;
              return false;
            }
          );
          this.tscStrictDiagnostics.set(file, filteredDiagnostics);
        }
      }
    }
  }

  private static isClassLikeOrIface(node: ts.Node): boolean {
    return ts.isClassLike(node) || ts.isInterfaceDeclaration(node);
  }

  private handleFunctionExpression(node: Node): void {
    const funcExpr = node as FunctionExpression;
    const isGeneric = funcExpr.typeParameters !== undefined && funcExpr.typeParameters.length > 0;
    const isGenerator = funcExpr.asteriskToken !== undefined;
    const hasThisKeyword = TypeScriptLinter.scopeContainsThis(funcExpr.body);
    const [hasUnfixableReturnType, newRetTypeNode] = this.handleMissingReturnType(funcExpr);
    const autofixable = !isGeneric && !isGenerator && !hasThisKeyword && !hasUnfixableReturnType;

    let autofix: Autofix[] | undefined;
    if (autofixable && Autofixer.shouldAutofix(node, FaultID.FunctionExpression)) {
      autofix = [ Autofixer.fixFunctionExpression(funcExpr, funcExpr.parameters, newRetTypeNode) ];
    }

    this.incrementCounters(node, FaultID.FunctionExpression, autofixable, autofix);
    if (isGenerator) {
      this.incrementCounters(funcExpr, FaultID.GeneratorFunction);
    }
    if (!Utils.hasPredecessor(funcExpr, TypeScriptLinter.isClassLikeOrIface)) {
      this.reportThisKeywordsInScope(funcExpr.body);
    }
    if (hasUnfixableReturnType) {
      this.incrementCounters(funcExpr, FaultID.LimitedReturnTypeInference);
    }
  }

  private handleArrowFunction(node: Node): void {
    const arrowFunc = node as ArrowFunction;
    if (!Utils.hasPredecessor(arrowFunc, TypeScriptLinter.isClassLikeOrIface)) {
      this.reportThisKeywordsInScope(arrowFunc.body);
    }

    const contextType = TypeScriptLinter.tsTypeChecker.getContextualType(arrowFunc);
    if (!(contextType && Utils.isLibraryType(contextType))) {
      if (!arrowFunc.type) {
        this.handleMissingReturnType(arrowFunc);
      }
    }
  }

  private handleFunctionDeclaration(node: Node) {
    const tsFunctionDeclaration = node as ts.FunctionDeclaration;
    if (!tsFunctionDeclaration.type) {
      this.handleMissingReturnType(tsFunctionDeclaration);
    }
    if (tsFunctionDeclaration.name) {
      this.countDeclarationsWithDuplicateName(tsFunctionDeclaration.name, tsFunctionDeclaration);
    }
    if (tsFunctionDeclaration.body) {
      this.reportThisKeywordsInScope(tsFunctionDeclaration.body);
    }
    const parent = tsFunctionDeclaration.parent;
    if (!ts.isSourceFile(parent) && !ts.isModuleBlock(parent)) {
      this.incrementCounters(tsFunctionDeclaration, FaultID.LocalFunction);
    }
    if (tsFunctionDeclaration.asteriskToken) {
      this.incrementCounters(node, FaultID.GeneratorFunction);
    }
    if (Utils.hasSendableDecoratorFunctionOverload(tsFunctionDeclaration)) {
      if (!this.isSendableDecoratorValid(tsFunctionDeclaration)) {
        return;
      }
      Utils.getNonSendableDecorators(tsFunctionDeclaration)?.forEach((decorator) => {
        this.incrementCounters(decorator, FaultID.SendableFunctionDecorator);
      });
      if (!Utils.hasSendableDecorator(tsFunctionDeclaration)) {
        this.incrementCounters(tsFunctionDeclaration, FaultID.SendableFunctionOverloadDecorator);
      }
      this.scanCapturedVarsInSendableScope(tsFunctionDeclaration, tsFunctionDeclaration, FaultID.SendableFunctionImportedVariables);
    }
  }

  private handleMissingReturnType(funcLikeDecl: ts.FunctionLikeDeclaration | ts.MethodSignature): [boolean, ts.TypeNode | undefined] {
    // if (funcLikeDecl.type) return [false, funcLikeDecl.type];

    // Note: Return type can't be inferred for function without body.
    if (ts.isMethodSignature(funcLikeDecl) || !funcLikeDecl.body) {
      // Ambient flag is not exposed, and ts.NodeFlags is made const enum, so hardcode this value
      const isAmbientDeclaration = !!(funcLikeDecl.flags & (1 << 24));
      const isSignature = ts.isMethodSignature(funcLikeDecl);
      if ((isSignature || isAmbientDeclaration) && !funcLikeDecl.type) {
        this.incrementCounters(funcLikeDecl, FaultID.LimitedReturnTypeInference);
      }
      return [false, undefined];
    }

    let autofixable = false;
    let autofix: Autofix[] | undefined;
    let newRetTypeNode: TypeNode | undefined;
    const isFuncExpr = isFunctionExpression(funcLikeDecl);

    // Currently, ArkTS can't infer return type of function, when expression
    // in the return statement is a call to a function or method whose return
    // value type is omitted. In that case, we attempt to prepare an autofix.
    let hasLimitedRetTypeInference = this.hasLimitedTypeInferenceFromReturnExpr(funcLikeDecl.body);

    const tsSignature = TypeScriptLinter.tsTypeChecker.getSignatureFromDeclaration(funcLikeDecl);
    if (tsSignature) {
      const tsRetType = TypeScriptLinter.tsTypeChecker.getReturnTypeOfSignature(tsSignature);

      if (!tsRetType || Utils.isUnsupportedType(tsRetType)) {
        hasLimitedRetTypeInference = true;
      }
      else if (hasLimitedRetTypeInference) {
        newRetTypeNode = TypeScriptLinter.tsTypeChecker.typeToTypeNode(tsRetType, funcLikeDecl, NodeBuilderFlags.None);
        autofixable = !!newRetTypeNode;

        if (!isFuncExpr && newRetTypeNode && Autofixer.shouldAutofix(funcLikeDecl, FaultID.LimitedReturnTypeInference)) {
          autofix = [Autofixer.fixReturnType(funcLikeDecl, newRetTypeNode)];
        }
      }
    }

    // Don't report here if in function expression context.
    // See handleFunctionExpression for details.
    if (hasLimitedRetTypeInference && !isFuncExpr) {
      this.incrementCounters(funcLikeDecl, FaultID.LimitedReturnTypeInference, autofixable, autofix);
    }
    return [hasLimitedRetTypeInference && !newRetTypeNode, newRetTypeNode];
  }

  private hasLimitedTypeInferenceFromReturnExpr(funBody: ConciseBody): boolean {
    let hasLimitedTypeInference = false;
    const callback = (node: ts.Node): void => {
      if (hasLimitedTypeInference) {
        return;
      }

      if (
        ts.isReturnStatement(node) && node.expression &&
        Utils.isCallToFunctionWithOmittedReturnType(Utils.unwrapParenthesized(node.expression))
      ) {
        hasLimitedTypeInference = true;
      }

    };
    // Don't traverse other nested function-like declarations.
    const stopCondition = (node: ts.Node): boolean => {
      return ts.isFunctionDeclaration(node) ||
        ts.isFunctionExpression(node) ||
        ts.isMethodDeclaration(node) ||
        ts.isAccessor(node) ||
        ts.isArrowFunction(node);
    };
    if (isBlock(funBody)) {
      this.forEachNodeInSubtree(funBody, callback, stopCondition);
    }
    else {
      const tsExpr = Utils.unwrapParenthesized(funBody);
      hasLimitedTypeInference = Utils.isCallToFunctionWithOmittedReturnType(tsExpr);
    }

    return hasLimitedTypeInference;
  }

  private isValidTypeForUnaryArithmeticOperator(type: ts.Type): boolean {
    const typeFlags = type.getFlags();
    const numberLiteralFlags = ts.TypeFlags.BigIntLiteral | ts.TypeFlags.NumberLiteral;
    const numberLikeFlags = ts.TypeFlags.BigIntLike | ts.TypeFlags.NumberLike;
    const isNumberLike = !!(typeFlags & (numberLiteralFlags | numberLikeFlags));

    const isAllowedNumericType = Utils.isStdBigIntType(type) || Utils.isStdNumberType(type);

    return isNumberLike || isAllowedNumericType;
  }

  private handlePrefixUnaryExpression(node: Node) {
    const tsUnaryArithm = node as PrefixUnaryExpression;
    const tsUnaryOp = tsUnaryArithm.operator;
    const tsUnaryOperand = tsUnaryArithm.operand;
    if (
      tsUnaryOp === SyntaxKind.PlusToken ||
      tsUnaryOp === SyntaxKind.MinusToken ||
      tsUnaryOp === SyntaxKind.TildeToken
    ) {
      const tsOperatndType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsUnaryOperand);
      const isTilde = tsUnaryOp === ts.SyntaxKind.TildeToken;
      const isInvalidTilde =
        isTilde && ts.isNumericLiteral(tsUnaryOperand) && !Utils.isIntegerConstantValue(tsUnaryOperand);
      if (!this.isValidTypeForUnaryArithmeticOperator(tsOperatndType) || isInvalidTilde) {
        this.incrementCounters(node, FaultID.UnaryArithmNotNumber);
      }
    }
  }

  private handleBinaryExpression(node: Node): void {
    const tsBinaryExpr = node as BinaryExpression;
    const tsLhsExpr = tsBinaryExpr.left;
    const tsRhsExpr = tsBinaryExpr.right;

    if (Utils.isAssignmentOperator(tsBinaryExpr.operatorToken)) {
      if (isObjectLiteralExpression(tsLhsExpr) || isArrayLiteralExpression(tsLhsExpr)) {
        this.incrementCounters(node, FaultID.DestructuringAssignment);
      }
      if (isPropertyAccessExpression(tsLhsExpr)) {
        const tsLhsSymbol = Utils.trueSymbolAtLocation(tsLhsExpr);
        const tsLhsBaseSymbol = Utils.trueSymbolAtLocation(tsLhsExpr.expression);
        if (tsLhsSymbol && (tsLhsSymbol.flags & SymbolFlags.Method)) {
          this.incrementCounters(tsLhsExpr, FaultID.MethodReassignment);
        }
        if (
          Utils.isMethodAssignment(tsLhsSymbol) && tsLhsBaseSymbol &&
          (tsLhsBaseSymbol.flags & SymbolFlags.Function) !== 0
        ) {
          this.incrementCounters(tsLhsExpr, FaultID.PropertyDeclOnFunction);
        }
      }
    }

    const leftOperandType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsLhsExpr);
    const rightOperandType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsRhsExpr);

    if (tsBinaryExpr.operatorToken.kind === SyntaxKind.PlusToken) {
      if (Utils.isEnumMemberType(leftOperandType) && Utils.isEnumMemberType(rightOperandType)) {
        if (
            ((leftOperandType.flags & (TypeFlags.NumberLike)) && (rightOperandType.getFlags() & (TypeFlags.NumberLike))) ||
            ((leftOperandType.flags & (TypeFlags.StringLike)) && (rightOperandType.getFlags() & (TypeFlags.StringLike)))
          ) {
          return;
        }
      }
      else if (Utils.isNumberLikeType(leftOperandType) && Utils.isNumberLikeType(rightOperandType)) {
        return;
      }
      else if (Utils.isStringLikeType(leftOperandType) || Utils.isStringLikeType(rightOperandType)) {
        return;
      }
    }
    else if (
      tsBinaryExpr.operatorToken.kind === SyntaxKind.AmpersandToken ||
      tsBinaryExpr.operatorToken.kind === SyntaxKind.BarToken ||
      tsBinaryExpr.operatorToken.kind === SyntaxKind.CaretToken ||
      tsBinaryExpr.operatorToken.kind === SyntaxKind.LessThanLessThanToken ||
      tsBinaryExpr.operatorToken.kind === SyntaxKind.GreaterThanGreaterThanToken ||
      tsBinaryExpr.operatorToken.kind === SyntaxKind.GreaterThanGreaterThanGreaterThanToken
    ) {
      if (!(Utils.isNumberLikeType(leftOperandType) && Utils.isNumberLikeType(rightOperandType))||
            (tsLhsExpr.kind === SyntaxKind.NumericLiteral && !Utils.isIntegerConstantValue(tsLhsExpr as NumericLiteral)) ||
            (tsRhsExpr.kind === SyntaxKind.NumericLiteral && !Utils.isIntegerConstantValue(tsRhsExpr as NumericLiteral))
          ) {
        return; //this.incrementCounters(node, FaultID.BitOpWithWrongType);
      }
    }
    else if (tsBinaryExpr.operatorToken.kind === SyntaxKind.CommaToken) {
      // CommaOpertor is allowed in 'for' statement initalizer and incrementor
      let tsExprNode: Node = tsBinaryExpr;
      let tsParentNode = tsExprNode.parent;
      while (tsParentNode && tsParentNode.kind === SyntaxKind.BinaryExpression) {
        tsExprNode = tsParentNode;
        tsParentNode = tsExprNode.parent;
      }

      if (tsParentNode && tsParentNode.kind === SyntaxKind.ForStatement) {
        const tsForNode = tsParentNode as ForStatement;
        if (tsExprNode === tsForNode.initializer || tsExprNode === tsForNode.incrementor) return;
      }
      this.incrementCounters(node, FaultID.CommaOperator);
    }
    else if (tsBinaryExpr.operatorToken.kind === SyntaxKind.InstanceOfKeyword) {
      const leftExpr = Utils.unwrapParenthesized(tsBinaryExpr.left);
      const leftSymbol = Utils.trueSymbolAtLocation(leftExpr);
      // In STS, the left-hand side expression may be of any reference type, otherwise
      // a compile-time error occurs. In addition, the left operand in STS cannot be a type.
      if (tsLhsExpr.kind === SyntaxKind.ThisKeyword) {
        return;
      }
      if (Utils.isPrimitiveType(leftOperandType) || isTypeNode(leftExpr) || Utils.isTypeSymbol(leftSymbol)) {
        this.incrementCounters(node, FaultID.InstanceofUnsupported);
      }
    } else if (tsBinaryExpr.operatorToken.kind === SyntaxKind.InKeyword) {
      this.incrementCounters(tsBinaryExpr.operatorToken, FaultID.InOperator);
    } else if (tsBinaryExpr.operatorToken.kind === SyntaxKind.EqualsToken) {
      this.checkAssignmentMatching(tsBinaryExpr, leftOperandType, tsRhsExpr);
      const typeNode = Utils.getVariableDeclarationTypeNode(tsLhsExpr);
      this.handleEsObjectAssignment(tsBinaryExpr, typeNode, tsRhsExpr);
    }
  }

  private handleVariableDeclarationList(node: Node): void {
    const varDeclFlags = getCombinedNodeFlags(node);
    if (!(varDeclFlags & (NodeFlags.Let | NodeFlags.Const))) {
      this.incrementCounters(node, FaultID.VarDeclaration);
    }
  }

  private handleVariableDeclaration(node: Node): void {
    const tsVarDecl = node as VariableDeclaration;
    if (isArrayBindingPattern(tsVarDecl.name) || isObjectBindingPattern(tsVarDecl.name)) {
      this.incrementCounters(node, FaultID.DestructuringDeclaration);
    }
    {
      // Check variable declaration for duplicate name.
      const visitBindingPatternNames = (tsBindingName: BindingName): void => {
        if (isIdentifier(tsBindingName)) {
          // The syntax kind of the declaration is defined here by the parent of 'BindingName' node.
          this.countDeclarationsWithDuplicateName(tsBindingName, tsBindingName, tsBindingName.parent.kind);
        }
        else {
          for (const tsBindingElem of tsBindingName.elements) {
            if (isOmittedExpression(tsBindingElem)) continue;

            visitBindingPatternNames(tsBindingElem.name);
          }
        }
      };

      visitBindingPatternNames(tsVarDecl.name);
    }

    if (tsVarDecl.type && tsVarDecl.initializer) {
      this.checkAssignmentMatching(
        tsVarDecl,
        TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsVarDecl.type),
        tsVarDecl.initializer
      );
    }

    this.handleEsObjectDelaration(tsVarDecl);
    this.handleDeclarationInferredType(tsVarDecl);
    this.handleDefiniteAssignmentAssertion(tsVarDecl);
  }

  private handleEsObjectDelaration(node: ts.VariableDeclaration) {
    const isDeclaredESObject = !!node.type && Utils.isEsObjectType(node.type);
    const initalizerTypeNode = node.initializer && Utils.getVariableDeclarationTypeNode(node.initializer);
    const isInitializedWithESObject = !!initalizerTypeNode && Utils.isEsObjectType(initalizerTypeNode);
    const isLocal = Utils.isInsideBlock(node)
    if ((isDeclaredESObject || isInitializedWithESObject) && !isLocal) {
      this.incrementCounters(node, FaultID.EsObjectType);
      return;
    }

    if (node.initializer) {
      this.handleEsObjectAssignment(node, node.type, node.initializer);
      return;
    }
  }

  private handleEsObjectAssignment(node: ts.Node, nodeDeclType: ts.TypeNode | undefined, initializer: ts.Node) {
    const isTypeAnnotated = !!nodeDeclType;
    const isDeclaredESObject = !!nodeDeclType && Utils.isEsObjectType(nodeDeclType);
    const initalizerTypeNode = Utils.getVariableDeclarationTypeNode(initializer);
    const isInitializedWithESObject = !!initalizerTypeNode && Utils.isEsObjectType(initalizerTypeNode);
    if (isTypeAnnotated && !isDeclaredESObject && isInitializedWithESObject) {
      this.incrementCounters(node, FaultID.EsObjectType);
      return;
    }

    if (isDeclaredESObject && !Utils.isValueAssignableToESObject(initializer)) {
      this.incrementCounters(node, FaultID.EsObjectType);
    }
  }


  private handleCatchClause(node: Node): void {
    const tsCatch = node as CatchClause;
    // In TS catch clause doesn't permit specification of the exception varible type except 'any' or 'unknown'.
    // It is not compatible with STS 'catch' where the exception varilab has to be of type
    // 'Exception' or derived from it.
    // So each 'catch' which has explicite type for the exception object goes to problems in strict mode.
    if (tsCatch.variableDeclaration && tsCatch.variableDeclaration.type) {
      this.incrementCounters(node, FaultID.CatchWithUnsupportedType);
    }
  }

  private handleClassDeclaration(node: Node): void {
    const tsClassDecl = node as ClassDeclaration;
    this.staticBlocks.clear();

    if (tsClassDecl.name) {
      this.countDeclarationsWithDuplicateName(tsClassDecl.name, tsClassDecl);
    }
    this.countClassMembersWithDuplicateName(tsClassDecl);

    const isSendableClass = Utils.hasSendableDecorator(tsClassDecl);
    if (isSendableClass) {
      Utils.getNonSendableDecorators(tsClassDecl)?.forEach((decorator) => {
        this.incrementCounters(decorator, FaultID.SendableClassDecorator);
      });
      tsClassDecl.typeParameters?.forEach((typeParamDecl) => {
        this.checkSendableTypeParameter(typeParamDecl);
      });
    }

    if (tsClassDecl.heritageClauses) {
      for (const hClause of tsClassDecl.heritageClauses) {
        if (!hClause) {
          continue;
        }
        this.checkClassDeclarationHeritageClause(hClause, isSendableClass);
      }
    }

    if (isSendableClass) {
      tsClassDecl.members.forEach((classMember) => {
        this.scanCapturedVarsInSendableScope(classMember, tsClassDecl, FaultID.SendableCapturedVars);
      });
    }

    if (!this.skipArkTSStaticBlocksCheck) {
      this.processClassStaticBlocks(tsClassDecl);
    }
  }

  private scanCapturedVarsInSendableScope(startNode: ts.Node, scope: ts.Node, faultId: FaultID): void {
    const callback = (node: ts.Node): void => {
      // Namespace import will introduce closure in the es2abc compiler stage
      if (!ts.isIdentifier(node) || this.checkNamespaceImportVar(node)) {
        return;
      }

      // The "b" of "A.b" should not be checked since it's load from object "A"
      const parent: ts.Node = node.parent;
      if (ts.isPropertyAccessExpression(parent) && parent.name === node) {
        return;
      }
      // When overloading function, will misreport
      if (ts.isFunctionDeclaration(startNode) && startNode.name === node) {
        return;
      }

      this.checkLocalDecl(node, scope, faultId);
    };
    // Type nodes should not checked because no closure will be introduced
    const stopCondition = (node: ts.Node): boolean => {
      // already existed 'arkts-sendable-class-decoratos' error
      if (ts.isDecorator(node) && node.parent === startNode) {
        return true;
      }
      return ts.isTypeReferenceNode(node);
    };
    this.forEachNodeInSubtree(startNode, callback, stopCondition);
  }

  private checkLocalDecl(node: ts.Identifier, scope: ts.Node, faultId: FaultID): void {
    const trueSym = Utils.trueSymbolAtLocation(node);
    // Sendable decorator should be used in method of Sendable classes
    if (trueSym === undefined) {
      return;
    }

    // Const enum member will be replaced by the exact value of it, no closure will be introduced
    if (Utils.isConstEnum(trueSym)) {
      return;
    }

    const declarations = trueSym.getDeclarations();
    if (declarations?.length) {
      this.checkLocalDeclWithSendableClosure(node, scope, declarations[0], faultId);
    }
  }

  private checkLocalDeclWithSendableClosure(
    node: ts.Identifier,
    scope: ts.Node,
    decl: ts.Declaration,
    faultId: FaultID
  ): void {
    const declPosition = decl.getStart();
    if (decl.getSourceFile().fileName !== node.getSourceFile().fileName ||
        declPosition !== undefined && declPosition >= scope.getStart() && declPosition < scope.getEnd()) {
      return;
    }

    if (this.isFileExportDecl(decl)) {
      return;
    }

    if (this.checkIsTopClosure(decl)) {
      return;
    }

    /**
     * The cases in condition will introduce closure if defined in the same file as the Sendable class. The following
     * cases are excluded because they are not allowed in ArkTS:
     * 1. ImportEqualDecalration
     * 2. BindingElement
     */
    if (ts.isVariableDeclaration(decl) || ts.isFunctionDeclaration(decl) || ts.isClassDeclaration(decl) ||
        ts.isInterfaceDeclaration(decl) || ts.isEnumDeclaration(decl) || ts.isModuleDeclaration(decl) ||
        ts.isParameter(decl)) {
      this.incrementCounters(node, faultId);
    }
  }

  private checkIsTopClosure(decl: ts.Declaration): boolean {
    if (!ts.isSourceFile(decl.parent)) {
      return false;
    }
    if (ts.isClassDeclaration(decl) && Utils.isSendableClassOrInterface(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(decl))) {
      return true;
    }
    if (ts.isFunctionDeclaration(decl) && Utils.hasSendableDecoratorFunctionOverload(decl)) {
      return true;
    }
    return false;
  }

  private checkNamespaceImportVar(node: ts.Node): boolean {
    // Namespace import cannot be determined by the true symbol
    const sym = TypeScriptLinter.tsTypeChecker.getSymbolAtLocation(node);
    const decls = sym?.getDeclarations();
    if (decls?.length) {
      if (ts.isNamespaceImport(decls[0])) {
        this.incrementCounters(node, FaultID.SendableCapturedVars);
        return true;
      }
    }
    return false;
  }

  isFileExportDecl(decl: ts.Declaration): boolean {
    const sourceFile = decl.getSourceFile();
    if (!this.fileExportDeclCaches) {
      this.fileExportDeclCaches = Utils.searchFileExportDecl(sourceFile);
    }
    return this.fileExportDeclCaches.has(decl);
  }

  private checkClassDeclarationHeritageClause(hClause: ts.HeritageClause, isSendableClass: boolean): void {
    for (const tsTypeExpr of hClause.types) {

      /*
       * Always resolve type from 'tsTypeExpr' node, not from 'tsTypeExpr.expression' node,
       * as for the latter, type checker will return incorrect type result for classes in
       * 'extends' clause. Additionally, reduce reference, as mostly type checker returns
       * the TypeReference type objects for classes and interfaces.
       */
      const tsExprType = Utils.reduceReference(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsTypeExpr));
      const isSendableBaseType = Utils.isSendableClassOrInterface(tsExprType);
      if (tsExprType.isClass() && hClause.token === ts.SyntaxKind.ImplementsKeyword) {
        this.incrementCounters(tsTypeExpr, FaultID.ImplementsClass);
      }

      if (!isSendableClass) {
        // Non-Sendable class can not implements sendable interface / extends sendable class
        if (isSendableBaseType) {
          this.incrementCounters(tsTypeExpr, FaultID.SendableClassInheritance);
        }
        continue;
      }

      /*
       * Sendable class can implements any interface / extends only sendable class
       * Sendable class can not extends sendable class variable(local / import)
       */
      if (hClause.token === ts.SyntaxKind.ExtendsKeyword) {
        if (!isSendableBaseType) {
          this.incrementCounters(tsTypeExpr, FaultID.SendableClassInheritance);
          continue;
        }
        if (!this.isValidSendableClassExtends(tsTypeExpr)) {
          this.incrementCounters(tsTypeExpr, FaultID.SendableClassInheritance);
        }
      }
    }
  }

  private isValidSendableClassExtends(tsTypeExpr: ts.ExpressionWithTypeArguments): boolean {
    const expr = tsTypeExpr.expression;
    const sym = TypeScriptLinter.tsTypeChecker.getSymbolAtLocation(expr);
    if (sym && (sym.flags & ts.SymbolFlags.Class) === 0) {
      // handle non-class situation(local / import)
      if ((sym.flags & ts.SymbolFlags.Alias) !== 0) {

        /*
         * Sendable class can not extends imported sendable class variable
         * Sendable class can extends imported sendable class
         */
        const realSym = TypeScriptLinter.tsTypeChecker.getAliasedSymbol(sym);
        if (realSym && (realSym.flags & ts.SymbolFlags.Class) === 0) {
          return false;
        }
        return true;
      }
      return false;
    }
    return true;
  }

  private checkSendableTypeParameter(typeParamDecl: ts.TypeParameterDeclaration): void {
    const defaultTypeNode = typeParamDecl.default;
    if (defaultTypeNode) {
      if (!Utils.isSendableTypeNode(defaultTypeNode)) {
        this.incrementCounters(defaultTypeNode, FaultID.SendableGenericTypes);
      }
    }
  }

  private processClassStaticBlocks(classDecl: ts.ClassDeclaration): void {
    let hasStaticBlock = false;
    for (const element of classDecl.members) {
      if (ts.isClassStaticBlockDeclaration(element)) {
        if (hasStaticBlock) {
          this.incrementCounters(element, FaultID.MultipleStaticBlocks);
        } else {
          hasStaticBlock = true;
        }
      }
    }
  }

  private handleModuleDeclaration(node: Node): void {
    const tsModuleDecl = node as ModuleDeclaration;
    this.countDeclarationsWithDuplicateName(tsModuleDecl.name, tsModuleDecl);

    const tsModuleBody = tsModuleDecl.body;
    const tsModifiers = tsModuleDecl.modifiers; // TSC 4.2 doesn't have 'getModifiers()' method
    if (tsModuleBody) {
      if (isModuleBlock(tsModuleBody)) {
        for (const tsModuleStmt of tsModuleBody.statements) {
          switch (tsModuleStmt.kind) {
            case SyntaxKind.VariableStatement:
            case SyntaxKind.FunctionDeclaration:
            case SyntaxKind.ClassDeclaration:
            case SyntaxKind.InterfaceDeclaration:
            case SyntaxKind.TypeAliasDeclaration:
            case SyntaxKind.EnumDeclaration:
            case SyntaxKind.ExportDeclaration:
              break;
            // Nested namespace declarations are prohibited
            // but there is no cookbook recipe for it!
            case SyntaxKind.ModuleDeclaration:
              break;
            default:
              this.incrementCounters(tsModuleStmt, FaultID.NonDeclarationInNamespace);
              break;
          }
        }
      }
    }

    if (!(tsModuleDecl.flags & NodeFlags.Namespace) &&
        Utils.hasModifier(tsModifiers, SyntaxKind.DeclareKeyword)) {
      this.incrementCounters(tsModuleDecl, FaultID.ShorthandAmbientModuleDecl);
    }

    if (isStringLiteral(tsModuleDecl.name) && tsModuleDecl.name.text.includes("*")) {
      this.incrementCounters(tsModuleDecl, FaultID.WildcardsInModuleName);
    }
  }

  private handleTypeAliasDeclaration(node: Node): void {
    const tsTypeAlias = node as TypeAliasDeclaration;
    this.countDeclarationsWithDuplicateName(tsTypeAlias.name, tsTypeAlias);
    if (Utils.hasSendableDecorator(tsTypeAlias)) {
      if (!this.isSendableDecoratorValid(tsTypeAlias)) {
        return;
      }
      Utils.getNonSendableDecorators(tsTypeAlias)?.forEach((decorator) => {
        this.incrementCounters(decorator, FaultID.SendableTypeAliasDecorator);
      });
      if (!ts.isFunctionTypeNode(tsTypeAlias.type)) {
        this.incrementCounters(tsTypeAlias.type, FaultID.SendableTypeAliasDeclaration);
      }
    }
  }

  private handleImportClause(node: Node): void {
    const tsImportClause = node as ImportClause;
    if (tsImportClause.name) {
      this.countDeclarationsWithDuplicateName(tsImportClause.name, tsImportClause);
    }
  }

  private handleImportSpecifier(node: Node): void {
    const tsImportSpecifier = node as ImportSpecifier;
    this.countDeclarationsWithDuplicateName(tsImportSpecifier.name, tsImportSpecifier);
  }

  private handleNamespaceImport(node: Node): void {
    const tsNamespaceImport = node as NamespaceImport;
    this.countDeclarationsWithDuplicateName(tsNamespaceImport.name, tsNamespaceImport);
  }

  private handleTypeAssertionExpression(node: Node): void {
    const tsTypeAssertion = node as TypeAssertion;
    if (tsTypeAssertion.type.getText() === "const") {
      this.incrementCounters(tsTypeAssertion, FaultID.ConstAssertion);
    }
    else {
      this.incrementCounters(node, FaultID.TypeAssertion);
    }
  }

  private handleMethodDeclaration(node: Node): void {
    const tsMethodDecl = node as MethodDeclaration;
    Utils.getDecoratorsIfInSendableClass(tsMethodDecl)?.forEach((decorator) => {
      this.incrementCounters(decorator, FaultID.SendableClassDecorator);
    });
    let isStatic = false;
    if (tsMethodDecl.modifiers) {
      for (const mod of tsMethodDecl.modifiers) {
        if (mod.kind === SyntaxKind.StaticKeyword) {
          isStatic = true;
          break;
        }
      }
    }
    if (tsMethodDecl.body && isStatic) {
      this.reportThisKeywordsInScope(tsMethodDecl.body);
    }
    if (!tsMethodDecl.type) {
      this.handleMissingReturnType(tsMethodDecl);
    }
    if (tsMethodDecl.asteriskToken) {
      this.incrementCounters(node, FaultID.GeneratorFunction);
    }
    this.filterOutDecoratorsDiagnostics(ts.getDecorators(tsMethodDecl), Utils.NON_RETURN_FUNCTION_DECORATORS,
      { begin: tsMethodDecl.parameters.end, end: tsMethodDecl.body?.getStart() ?? tsMethodDecl.parameters.end },
      Utils.FUNCTION_HAS_NO_RETURN_ERROR_CODE);
  }

  private handleMethodSignature(node: ts.MethodSignature): void {
    const tsMethodSign = node as ts.MethodSignature;
    if (!tsMethodSign.type) {
      this.handleMissingReturnType(tsMethodSign);
    }
  }

  private handleIdentifier(node: Node): void {
    const tsIdentifier = node as Identifier;
    const tsIdentSym = Utils.trueSymbolAtLocation(tsIdentifier);

    if (!tsIdentSym) {
      return;
    }

    if (
      (tsIdentSym.flags & ts.SymbolFlags.Module) !== 0 &&
      (tsIdentSym.flags & ts.SymbolFlags.Transient) !== 0 &&
      tsIdentifier.text === "globalThis"
    ) {
      this.incrementCounters(node, FaultID.GlobalThis);
    } else {
      this.handleRestrictedValues(tsIdentifier, tsIdentSym);
    }
  }

  private isAllowedClassValueContext(tsIdentifier: Identifier /* Param not used ! ??, tsIdentSym: Symbol */): boolean {
    let ctx: Node = tsIdentifier;
    while (isPropertyAccessExpression(ctx.parent) || isQualifiedName(ctx.parent)) {
      ctx = ctx.parent;
    }
    if (isPropertyAssignment(ctx.parent) && isObjectLiteralExpression(ctx.parent.parent)) {
      ctx = ctx.parent.parent;
    }
    if (isArrowFunction(ctx.parent) && ctx.parent.body === ctx) {
      ctx = ctx.parent;
    }

    if (isCallExpression(ctx.parent) || isNewExpression(ctx.parent)) {
      const callee = ctx.parent.expression;
      const isAny = Utils.isAnyType(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(callee));
      const isDynamic = isAny || Utils.hasLibraryType(callee);
      if (callee !== ctx && isDynamic) {
        return true;
      }
    }
    return false;
  }

  private handleRestrictedValues(tsIdentifier: Identifier, tsIdentSym: Symbol) {
    const illegalValues = SymbolFlags.ConstEnum | SymbolFlags.RegularEnum | SymbolFlags.ValueModule | SymbolFlags.Class;
    // If module name is duplicated by another declaration, this increases the possibility
    // of finding a lot of false positives. Thus, do not check further in that case.
    if ((tsIdentSym.flags & SymbolFlags.ValueModule) !== 0) {
      if (!!tsIdentSym && Utils.symbolHasDuplicateName(tsIdentSym, SyntaxKind.ModuleDeclaration)) {
        return;
      }
    }
    if ((tsIdentSym.flags & illegalValues) === 0 || Utils.isStruct(tsIdentSym) ||
        !this.identiferUseInValueContext(tsIdentifier, tsIdentSym)) {
          return;
    }
    if ((tsIdentSym.flags & SymbolFlags.Class) !== 0) {
      if (this.isAllowedClassValueContext(tsIdentifier /* param not used!?? , tsIdentSym */)) {
        return;
      }
    }
    if ((tsIdentSym.flags & SymbolFlags.Annotation) !== 0) {
      return;
    }

    if (tsIdentSym.flags & SymbolFlags.ValueModule) {
      this.incrementCounters(tsIdentifier, FaultID.NamespaceAsObject);
    }
    else {
      // missing EnumAsObject
      this.incrementCounters(tsIdentifier, FaultID.ClassAsObject);
    }
  }

  private identiferUseInValueContext(
    ident: Identifier,
    tsSym: Symbol
  ) {
    // If identifier is the right-most name of Property Access chain or Qualified name,
    // or it's a separate identifier expression, then identifier is being referenced as an value.
    let qualifiedStart: Node = ident;
    while (isPropertyAccessExpression(qualifiedStart.parent) || isQualifiedName(qualifiedStart.parent)) {
      qualifiedStart = qualifiedStart.parent;
    }
    const parent = qualifiedStart.parent;
    return !(
      // treat TypeQuery as valid because it's already forbidden (FaultID.TypeQuery)
      (isTypeNode(parent) && !isTypeOfExpression(parent)) ||
      // ElementAccess is allowed for enum types
      this.isEnumPropAccess(ident, tsSym, parent) ||
      isExpressionWithTypeArguments(parent) ||
      isExportAssignment(parent) ||
      isExportSpecifier(parent) ||
      isMetaProperty(parent) ||
      isImportClause(parent) ||
      isClassLike(parent) ||
      isInterfaceDeclaration(parent) ||
      isModuleDeclaration(parent) ||
      isEnumDeclaration(parent) ||
      isNamespaceImport(parent) ||
      isImportSpecifier(parent) ||
      isImportEqualsDeclaration(parent) ||
      (isQualifiedName(qualifiedStart) && ident !== qualifiedStart.right) ||
      (isPropertyAccessExpression(qualifiedStart) &&
        ident !== qualifiedStart.name) ||
      (isNewExpression(qualifiedStart.parent) &&
        qualifiedStart === qualifiedStart.parent.expression) ||
      (isBinaryExpression(qualifiedStart.parent) &&
        qualifiedStart.parent.operatorToken.kind ===
        SyntaxKind.InstanceOfKeyword)
    );
  }

  private isEnumPropAccess(ident: ts.Identifier, tsSym: ts.Symbol, context: ts.Node): boolean {
    return ts.isElementAccessExpression(context) && !!(tsSym.flags & ts.SymbolFlags.Enum) &&
      (context.expression == ident ||
        (ts.isPropertyAccessExpression(context.expression) && context.expression.name == ident));
  }

  private isElementAcessAllowed(type: ts.Type, argType: ts.Type): boolean {
    if (type.isUnion()) {
      for (const t of type.types) {
        if (!this.isElementAcessAllowed(t, argType)) {
          return false;
        }
      }
      return true;
    }

    const typeNode = TypeScriptLinter.tsTypeChecker.typeToTypeNode(type, undefined, ts.NodeBuilderFlags.None);

    if (Utils.isArkTSCollectionsArrayLikeType(type)) {
      return Utils.isNumberLikeType(argType);
    }

    return (
      Utils.isLibraryType(type) ||
      Utils.isAnyType(type) ||
      Utils.isOrDerivedFrom(type, Utils.isIndexableArray) ||
      Utils.isOrDerivedFrom(type, Utils.isTuple) ||
      Utils.isOrDerivedFrom(type, Utils.isStdRecordType) ||
      Utils.isOrDerivedFrom(type, Utils.isStringType) ||
      Utils.isOrDerivedFrom(type, Utils.isStdMapType) ||
      Utils.isIntrinsicObjectType(type) ||
      Utils.isEnumType(type) ||
      // we allow EsObject here beacuse it is reported later using FaultId.EsObjectType
      Utils.isEsObjectType(typeNode)
    );
  }

  private handleElementAccessExpression(node: ts.Node): void {
    const tsElementAccessExpr = node as ElementAccessExpression;
    const tsElementAccessExprSymbol = Utils.trueSymbolAtLocation(tsElementAccessExpr.expression);
    const tsElemAccessBaseExprType = Utils.getNonNullableType(Utils.getTypeOrTypeConstraintAtLocation(tsElementAccessExpr.expression));
    const tsElemAccessArgType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsElementAccessExpr.argumentExpression);

    if (
      // unnamed types do not have symbol, so need to check that explicitly
      !Utils.isLibrarySymbol(tsElementAccessExprSymbol) &&
      !ts.isArrayLiteralExpression(tsElementAccessExpr.expression) &&
      !this.isElementAcessAllowed(tsElemAccessBaseExprType, tsElemAccessArgType)
    ) {
      let autofix = Autofixer.fixPropertyAccessByIndex(node);
      const autofixable = autofix !== undefined;
      if (!Autofixer.shouldAutofix(node, FaultID.PropertyAccessByIndex)) {
        autofix = undefined;
      }
      this.incrementCounters(node, FaultID.PropertyAccessByIndex, autofixable, autofix);
    }
    if (Utils.hasEsObjectType(tsElementAccessExpr.expression)) {
      this.incrementCounters(node, FaultID.EsObjectType);
    }
  }

  private handleEnumMember(node: Node): void {
    const tsEnumMember = node as EnumMember;
    const tsEnumMemberType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsEnumMember);
    const constVal = TypeScriptLinter.tsTypeChecker.getConstantValue(tsEnumMember);

    if (tsEnumMember.initializer && !Utils.isValidEnumMemberInit(tsEnumMember.initializer)) {
      this.incrementCounters(node, FaultID.EnumMemberNonConstInit);
    }
    // check for type - all members should be of same type
    const enumDecl = tsEnumMember.parent;
    const firstEnumMember = enumDecl.members[0];
    const firstEnumMemberType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(firstEnumMember);
    const firstElewmVal = TypeScriptLinter.tsTypeChecker.getConstantValue(firstEnumMember);
    // each string enum member has its own type
    // so check that value type is string
    if(constVal !==undefined && typeof constVal === "string" &&
        firstElewmVal !==undefined && typeof firstElewmVal === "string") {
      return;
    }
    if (constVal !==undefined && typeof constVal === "number" &&
        firstElewmVal !==undefined && typeof firstElewmVal === "number") {
      return;
    }
    if(firstEnumMemberType !== tsEnumMemberType) {
      this.incrementCounters(node, FaultID.EnumMemberNonConstInit);
    }
  }

  private handleExportAssignment(node: Node): void {
    // (nsizov): check exportEquals and determine if it's an actual `export assignment`
    //   or a `default export namespace` when this two cases will be determined in cookbook
    const exportAssignment = node as ExportAssignment;
    if (exportAssignment.isExportEquals) {
      this.incrementCounters(node, FaultID.ExportAssignment);
    }

    if (!TypeScriptLinter.inSharedModule(node)) {
      return;
    }

    if (!Utils.isShareableEntity(exportAssignment.expression)) {
      this.incrementCounters(exportAssignment.expression, FaultID.SharedModuleExports);
    }
  }

  private handleCallExpression(node: Node): void {
    const tsCallExpr = node as CallExpression;

    const calleeSym = Utils.trueSymbolAtLocation(tsCallExpr.expression);
    const callSignature = TypeScriptLinter.tsTypeChecker.getResolvedSignature(tsCallExpr);

    this.handleImportCall(tsCallExpr);
    this.handleRequireCall(tsCallExpr);
    // NOTE: Keep handleFunctionApplyBindPropCall above handleGenericCallWithNoTypeArgs here!!!
    if (calleeSym !== undefined) {
      this.handleStdlibAPICall(tsCallExpr, calleeSym);
      this.handleFunctionApplyBindPropCall(tsCallExpr, calleeSym);
      if (Utils.symbolHasEsObjectType(calleeSym)) {
        this.incrementCounters(tsCallExpr, FaultID.EsObjectType);
      }
    }
    if (callSignature !== undefined && !Utils.isLibrarySymbol(calleeSym)) {
      this.handleGenericCallWithNoTypeArgs(tsCallExpr, callSignature);
      this.handleStructIdentAndUndefinedInArgs(tsCallExpr, callSignature);
    }
    this.handleLibraryTypeCall(tsCallExpr);

    if (ts.isPropertyAccessExpression(tsCallExpr.expression) && Utils.hasEsObjectType(tsCallExpr.expression.expression)) {
      this.incrementCounters(node, FaultID.EsObjectType);
    }
  }

  private handleEtsComponentExpression(node: ts.Node): void {
    // for all the checks we make EtsComponentExpression is compatible with the CallExpression
    const etsComponentExpression = node as ts.CallExpression;
    this.handleLibraryTypeCall(etsComponentExpression);
  }

  private handleImportCall(tsCallExpr: CallExpression): void {
    if (tsCallExpr.expression.kind === SyntaxKind.ImportKeyword) {
      // relax rule#133 "arkts-no-runtime-import"
      // this.incrementCounters(tsCallExpr, FaultID.DynamicImport);
      const tsArgs = tsCallExpr.arguments;
      if (tsArgs.length > 1 && isObjectLiteralExpression(tsArgs[1])) {
        const objLitExpr = tsArgs[1] as ObjectLiteralExpression;
        for (const tsProp of objLitExpr.properties) {
          if (isPropertyAssignment(tsProp) || isShorthandPropertyAssignment(tsProp)) {
            if (tsProp.name.getText() === "assert") {
              this.incrementCounters(tsProp, FaultID.ImportAssertion);
              break;
            }
          }
        }
      }
    }
  }

  private handleRequireCall(tsCallExpr: CallExpression): void {
    if (
      isIdentifier(tsCallExpr.expression) &&
      tsCallExpr.expression.text === "require" &&
      isVariableDeclaration(tsCallExpr.parent)
    ) {
      const tsType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsCallExpr.expression);
      if (Utils.isInterfaceType(tsType) && tsType.symbol.name === "NodeRequire") {
        this.incrementCounters(tsCallExpr.parent, FaultID.ImportAssignment);
      }
    }
  }

  private handleGenericCallWithNoTypeArgs(callLikeExpr: ts.CallExpression | ts.NewExpression, callSignature: ts.Signature) {

    const tsSyntaxKind = isNewExpression(callLikeExpr) ? SyntaxKind.Constructor : SyntaxKind.FunctionDeclaration;
    const signDecl = TypeScriptLinter.tsTypeChecker.signatureToSignatureDeclaration(callSignature, tsSyntaxKind,
        undefined, NodeBuilderFlags.WriteTypeArgumentsOfSignature | NodeBuilderFlags.IgnoreErrors);

    if (signDecl?.typeArguments) {
      const resolvedTypeArgs = signDecl.typeArguments;

      const startTypeArg = callLikeExpr.typeArguments?.length ?? 0;
      for (let i = startTypeArg; i < resolvedTypeArgs.length; ++i) {
        const typeNode = resolvedTypeArgs[i];
        // if compiler infers 'unknown' type there are 2 possible cases:
        //   1. Compiler unable to infer type from arguments and use 'unknown'
        //   2. Compiler infer 'unknown' from arguments
        // We report error in both cases. It is ok because we cannot use 'unknown'
        // in ArkTS and already have separate check for it.
        if (typeNode.kind == ts.SyntaxKind.UnknownKeyword) {
          this.incrementCounters(callLikeExpr, FaultID.GenericCallNoTypeArgs);
          break;
        }
      }
    }
  }

  private static readonly listFunctionApplyCallApis = [
    'Function.apply',
    'Function.call',
    'CallableFunction.apply',
    'CallableFunction.call'
  ];

  private static readonly listFunctionBindApis = [
    'Function.bind',
    'CallableFunction.bind'
  ];

  private handleFunctionApplyBindPropCall(tsCallExpr: ts.CallExpression, calleeSym: ts.Symbol): void {
    const exprName = TypeScriptLinter.tsTypeChecker.getFullyQualifiedName(calleeSym);
    if (TypeScriptLinter.listFunctionApplyCallApis.includes(exprName)) {
      this.incrementCounters(tsCallExpr, FaultID.FunctionApplyCall);
    }
    if (TypeScriptLinter.listFunctionBindApis.includes(exprName)) {
      this.incrementCounters(tsCallExpr, FaultID.FunctionBind);
    }
  }

  private handleStructIdentAndUndefinedInArgs(tsCallOrNewExpr: ts.CallExpression | ts.NewExpression, callSignature: ts.Signature) {
    if (!tsCallOrNewExpr.arguments) {
      return;
    }

    for (let argIndex = 0; argIndex < tsCallOrNewExpr.arguments.length; ++argIndex) {
      const tsArg = tsCallOrNewExpr.arguments[argIndex];
      const tsArgType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsArg);
      if (!tsArgType) continue;

      let paramIndex = argIndex < callSignature.parameters.length ? argIndex : callSignature.parameters.length-1;
      let tsParamSym = callSignature.parameters[paramIndex];
      if (!tsParamSym) continue;

      const tsParamDecl = tsParamSym.valueDeclaration;
      if (tsParamDecl && isParameter(tsParamDecl)) {
        let tsParamType = TypeScriptLinter.tsTypeChecker.getTypeOfSymbolAtLocation(tsParamSym, tsParamDecl);
        if (tsParamDecl.dotDotDotToken && Utils.isGenericArrayType(tsParamType) && tsParamType.typeArguments) {
          tsParamType = tsParamType.typeArguments[0];
        }
        if (!tsParamType) continue;

        this.checkAssignmentMatching(tsArg, tsParamType, tsArg);
      }
    }
  }

  // let re = new RegExp("^(" + arr.reduce((acc, v) => ((acc ? (acc + "|") : "") + v)) +")$")
  private static LimitedApis = new Map<string, {arr: Array<string> | null, fault: FaultID}> ([
    ["global", {arr: Utils.LIMITED_STD_GLOBAL_FUNC, fault: FaultID.LimitedStdLibApi}],
    ["Object", {arr: Utils.LIMITED_STD_OBJECT_API, fault: FaultID.LimitedStdLibApi}],
    ["ObjectConstructor", {arr: Utils.LIMITED_STD_OBJECT_API, fault: FaultID.LimitedStdLibApi}],
    ["Reflect", {arr: Utils.LIMITED_STD_REFLECT_API, fault: FaultID.LimitedStdLibApi}],
    ["ProxyHandler", {arr: Utils.LIMITED_STD_PROXYHANDLER_API, fault: FaultID.LimitedStdLibApi}],
    ["Symbol", {arr: null, fault: FaultID.SymbolType}],
    ["SymbolConstructor", {arr: null, fault: FaultID.SymbolType}],
  ])

  private handleStdlibAPICall(callExpr: ts.CallExpression, calleeSym: ts.Symbol) {
    const name = calleeSym.getName();
    const parName = Utils.getParentSymbolName(calleeSym);
    if (parName === undefined) {
      if (Utils.LIMITED_STD_GLOBAL_FUNC.includes(name)) {
        this.incrementCounters(callExpr, FaultID.LimitedStdLibApi);
        return;
      }
      let escapedName = calleeSym.escapedName;
      if (escapedName === 'Symbol' || escapedName === 'SymbolConstructor') {
        this.incrementCounters(callExpr, FaultID.SymbolType);
      }
      return;
    }
    let lookup = TypeScriptLinter.LimitedApis.get(parName);
    if (lookup !== undefined && (lookup.arr === null || lookup.arr.includes(name))) {
      this.incrementCounters(callExpr, lookup.fault);
    };
  }


  private handleLibraryTypeCall(expr: ts.CallExpression | ts.NewExpression): void {
    if (!expr.arguments || !this.tscStrictDiagnostics || !this.sourceFile) {
      return;
    }

    const file = normalizePath(this.sourceFile.fileName);
    const tscDiagnostics: readonly ts.Diagnostic[] | undefined = this.tscStrictDiagnostics.get(file);
    if (!tscDiagnostics?.length) {
      return;
    }

    const isOhModulesEts = Utils.isOhModulesEtsSymbol(Utils.trueSymbolAtLocation(expr.expression));
    const deleteDiagnostics: Set<ts.Diagnostic> = new Set();
    LibraryTypeCallDiagnosticChecker.instance.filterDiagnostics(
      tscDiagnostics,
      expr,
      Utils.isLibraryType(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(expr.expression)),
      (diagnostic, errorType) => {

        /*
         * When a diagnostic meets the filter criteria, If it happens in an ets file in the 'oh_modules' directory.
         * the diagnostic is downgraded to warning. For other files, downgraded to nothing.
         */
        if (isOhModulesEts && errorType !== LibraryTypeCallDiagnosticCheckerNamespace.ErrorType.UNKNOW) {
          diagnostic.category = ts.DiagnosticCategory.Warning;
        } else {
          deleteDiagnostics.add(diagnostic);
        }
      }
    );

    if (!deleteDiagnostics.size) {
      return;
    }

    this.tscStrictDiagnostics.set(
      file,
      tscDiagnostics.filter((item) => {
        return !deleteDiagnostics.has(item);
      })
    );
  }

  private handleNewExpression(node: Node): void {
    const tsNewExpr = node as NewExpression;
    let callSignature = TypeScriptLinter.tsTypeChecker.getResolvedSignature(tsNewExpr);
    if (callSignature !== undefined) {
      this.handleStructIdentAndUndefinedInArgs(tsNewExpr, callSignature);
      this.handleGenericCallWithNoTypeArgs(tsNewExpr, callSignature);
    }
    this.handleSendableGenericTypes(tsNewExpr);
  }

  private handleSendableGenericTypes(node: ts.NewExpression): void {
    const type = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(node);
    if (!Utils.isSendableClassOrInterface(type)) {
      return;
    }

    const typeArgs = node.typeArguments;
    if (!typeArgs || typeArgs.length === 0) {
      return;
    }

    for (const arg of typeArgs) {
      if (!Utils.isSendableTypeNode(arg)) {
        this.incrementCounters(arg, FaultID.SendableGenericTypes);
      }
    }
  }

  private handleAsExpression(node: Node): void {
    const tsAsExpr = node as AsExpression;
    if (tsAsExpr.type.getText() === "const") this.incrementCounters(node, FaultID.ConstAssertion);

    const targetType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsAsExpr.type).getNonNullableType();
    const exprType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(tsAsExpr.expression).getNonNullableType();
    // check for rule#65:   "number as Number" and "boolean as Boolean" are disabled
    if(
      (Utils.isNumberLikeType(exprType) && Utils.isStdNumberType(targetType)) ||
      (Utils.isBooleanLikeType(exprType) && Utils.isStdBooleanType(targetType))
    ) {
      this.incrementCounters(node, FaultID.TypeAssertion);
    }
    if (
        !Utils.isSendableClassOrInterface(exprType) &&
        !Utils.isObject(exprType) &&
        !Utils.isAnyType(exprType) &&
        Utils.isSendableClassOrInterface(targetType)
    ) {
        this.incrementCounters(tsAsExpr, FaultID.SendableAsExpr);
    }
    if (
      Utils.isWrongSendableFunctionAssignment(targetType, exprType)
    ) {
      this.incrementCounters(tsAsExpr, FaultID.SendableFunctionAsExpr);
    }
  }

  private handleTypeReference(node: Node): void {
    const typeRef = node as TypeReferenceNode;

    const isESObject = Utils.isEsObjectType(typeRef);
    const isPossiblyValidContext = Utils.isEsObjectPossiblyAllowed(typeRef);
    if (isESObject && !isPossiblyValidContext) {
      this.incrementCounters(node, FaultID.EsObjectType);
      return;
    }
    const typeName = Utils.entityNameToString(typeRef.typeName);
    const isStdUtilityType = Utils.LIMITED_STANDARD_UTILITY_TYPES.includes(typeName);
    if (isStdUtilityType) {
      this.incrementCounters(node, FaultID.UtilityType);
      return;
    }

    // Using Partial<T> type is allowed only when its argument type is either Class or Interface.
    const isStdPartial = Utils.entityNameToString(typeRef.typeName) === 'Partial';
    const hasSingleTypeArgument = !!typeRef.typeArguments && typeRef.typeArguments.length === 1;
    const firstTypeArg = !!typeRef.typeArguments && hasSingleTypeArgument && typeRef.typeArguments[0];
    const argType = firstTypeArg && TypeScriptLinter.tsTypeChecker.getTypeFromTypeNode(firstTypeArg);
    if (isStdPartial && argType && !argType.isClassOrInterface()) {
      this.incrementCounters(node, FaultID.UtilityType);
      return;
    }

    const typeNameType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(typeRef.typeName);
    if (Utils.isSendableClassOrInterface(typeNameType)) {
      this.checkSendableTypeArguments(typeRef);
    }
  }

  private checkSendableTypeArguments(typeRef: TypeReferenceNode): void {
    if (typeRef.typeArguments) {
      for (const typeArg of typeRef.typeArguments) {
        if (!Utils.isSendableTypeNode(typeArg)) {
          this.incrementCounters(typeArg, FaultID.SendableGenericTypes);
        }
      }
    }
  }

  private handleMetaProperty(node: Node): void {
    const tsMetaProperty = node as MetaProperty;
    if (tsMetaProperty.name.text === "target") {
      this.incrementCounters(node, FaultID.NewTarget);
    }
  }

  private handleSpreadOp(node: Node) {
    // spread assignment is disabled
    // spread element is allowed only for arrays as rest parameter
    if (isSpreadElement(node)) {
      const spreadExprType = Utils.getTypeOrTypeConstraintAtLocation(node.expression);
      if (spreadExprType) {
        if (ts.isCallLikeExpression(node.parent) || ts.isArrayLiteralExpression(node.parent)) {
          if (
            Utils.isOrDerivedFrom(spreadExprType, Utils.isArray) ||
            Utils.isOrDerivedFrom(spreadExprType, Utils.isCollectionArrayType)
          ) {
            return;
          }
        }
      }
    }
    this.incrementCounters(node, FaultID.SpreadOperator);
  }

  private handleConstructSignature(node: Node) {
    switch (node.parent.kind) {
      case SyntaxKind.TypeLiteral:
        this.incrementCounters(node, FaultID.ConstructorType);
        break;
      case SyntaxKind.InterfaceDeclaration:
        this.incrementCounters(node, FaultID.ConstructorIface);
        break;
      default:
        return;
    }
  }

  private handleExpressionWithTypeArguments(node: Node) {
    const tsTypeExpr = node as ExpressionWithTypeArguments;
    const symbol = Utils.trueSymbolAtLocation(tsTypeExpr.expression);
    if (!!symbol && Utils.isEsObjectSymbol(symbol)) {
      this.incrementCounters(tsTypeExpr, FaultID.EsObjectType);
    }
  }

  private handleComputedPropertyName(node: ts.Node) {
    const computedProperty = node as ts.ComputedPropertyName;
    if (this.isSendableCompPropName(computedProperty)) {
      // cancel the '[Symbol.iterface]' restriction of 'sendable class/interface' in the '@arkts.collections.d.ets' file
      if (Utils.isSymbolIteratorExpression(computedProperty.expression)) {
        const declNode = computedProperty.parent?.parent;
        if (declNode && Utils.isArkTSCollectionsClassOrInterfaceDeclaration(declNode)) {
          return;
        }
      }
      this.incrementCounters(node, FaultID.SendableComputedPropName);
    } else if (!Utils.isValidComputedPropertyName(computedProperty, false)) {
      this.incrementCounters(node, FaultID.ComputedPropertyName);
    }
  }

  private isSendableCompPropName(compProp: ts.ComputedPropertyName): boolean {
    const declNode = compProp.parent?.parent;
    if (declNode && ts.isClassDeclaration(declNode) && Utils.hasSendableDecorator(declNode)) {
      return true;
    } else if (declNode && ts.isInterfaceDeclaration(declNode)) {
      const declNodeType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(declNode);
      if (Utils.isSendableClassOrInterface(declNodeType)) {
        return true;
      }
    }
    return false;
  }

  private handleGetAccessor(node: ts.GetAccessorDeclaration): void {
    Utils.getDecoratorsIfInSendableClass(node)?.forEach((decorator) => {
      this.incrementCounters(decorator, FaultID.SendableClassDecorator);
    });
  }

  private handleSetAccessor(node: ts.SetAccessorDeclaration): void {
    Utils.getDecoratorsIfInSendableClass(node)?.forEach((decorator) => {
      this.incrementCounters(decorator, FaultID.SendableClassDecorator);
    });
  }

  private handleDeclarationInferredType(
    decl: VariableDeclaration | PropertyDeclaration | ParameterDeclaration
  ) {
    // The type is explicitly specified, no need to check inferred type.
    if (decl.type) return;

    // issue 13161:
    // In TypeScript, the catch clause variable must be 'any' or 'unknown' type. Since
    // ArkTS doesn't support these types, the type for such variable is simply omitted,
    // and we don't report it as an error.
    if (isCatchClause(decl.parent)) return;

    //Destructuring declarations are not supported, do not process them.
    if (isArrayBindingPattern(decl.name) || isObjectBindingPattern(decl.name)) return;

    // issue 13987:
    // When variable have no type annotation and no initial value, and 'noImplicitAny'
    // option is enabled, compiler attempts to infer type from variable references:
    // see https://github.com/microsoft/TypeScript/pull/11263.
    // In this case, we still want to report the error, since ArkTS doesn't allow
    // to omit both type annotation and initializer.
    if (((ts.isVariableDeclaration(decl) && ts.isVariableStatement(decl.parent.parent)) || ts.isPropertyDeclaration(decl)) &&
      !decl.initializer) {
      if (ts.isPropertyDeclaration(decl) &&
        this.sourceFile.scriptKind === ScriptKind.ETS && this.sourceFile.isDeclarationFile &&
        decl.modifiers?.some(m => m.kind === SyntaxKind.PrivateKeyword)) {
        return;
      }
      this.incrementCounters(decl, FaultID.AnyType);
      return;
    }

    const type = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(decl);
    if (type) this.validateDeclInferredType(type, decl);
  }

  private handleDefiniteAssignmentAssertion(decl: VariableDeclaration | PropertyDeclaration) {
    if (decl.exclamationToken === undefined) {
      return;
    }

    if (decl.kind === ts.SyntaxKind.PropertyDeclaration) {
      const parentDecl = decl.parent;
      if (parentDecl.kind === ts.SyntaxKind.ClassDeclaration && Utils.hasSendableDecorator(parentDecl)) {
        this.incrementCounters(decl, FaultID.SendableDefiniteAssignment);
        return;
      }
    }
    this.incrementCounters(decl, FaultID.DefiniteAssignment);
  }

  private validatedTypesSet = new Set<Type>();

  private checkAnyOrUnknownChildNode(node: ts.Node): boolean {
    if (node.kind === ts.SyntaxKind.AnyKeyword ||
        node.kind === ts.SyntaxKind.UnknownKeyword) {
      return true;
    }
    const isAnyOrUnknown = forEachChild(node, (child) => {
      if (this.checkAnyOrUnknownChildNode(child)) {
        return true;
      }
      return undefined;
    });
    return !!isAnyOrUnknown;
  }

  private handleInferredObjectreference(
    type: ts.Type,
    decl: ts.VariableDeclaration | ts.PropertyDeclaration | ts.ParameterDeclaration
  ) {
    const typeArgs = TypeScriptLinter.tsTypeChecker.getTypeArguments(type as ts.TypeReference);
    if (typeArgs) {
      const haveAnyOrUnknownNodes = this.checkAnyOrUnknownChildNode(decl);
      if (!haveAnyOrUnknownNodes) {
        for (const typeArg of typeArgs) {
          this.validateDeclInferredType(typeArg, decl);
        }
      }
    }
  }

  private validateDeclInferredType(
    type: Type,
    decl: VariableDeclaration | PropertyDeclaration | ParameterDeclaration
  ): void {
    if (type.aliasSymbol !== undefined) {
      return;
    }
    const isObject = type.flags & ts.TypeFlags.Object;
    const isReference = (type as ts.ObjectType).objectFlags & ts.ObjectFlags.Reference;
    if (isObject && isReference) {
      this.handleInferredObjectreference(type, decl);
      return;
    }
    if (this.validatedTypesSet.has(type)) {
      return;
    }
    if (type.isUnion()) {
      this.validatedTypesSet.add(type);
      for (let unionElem of type.types) {
        this.validateDeclInferredType(unionElem, decl);
      }
    }

    if (Utils.isAnyType(type)) {
      this.incrementCounters(decl, FaultID.AnyType);
    }
    else if (Utils.isUnknownType(type)) {
      this.incrementCounters(decl, FaultID.UnknownType);
    }
  }

  private processNoCheckEntry(entry: PragmaPseudoMap[keyof PragmaPseudoMap]): void {
    if (entry.range?.kind === undefined || entry.range?.pos === undefined || entry.range?.end === undefined) {
      return;
    }
    this.incrementCounters(entry.range as ts.CommentRange, FaultID.ErrorSuppression);
  }

  private reportThisKeywordsInScope(scope: ts.Block | ts.Expression): void {
    const callback = (node: ts.Node): void => {
      if (node.kind === ts.SyntaxKind.ThisKeyword) {
        this.incrementCounters(node, FaultID.FunctionContainsThis);
      }
    };
    const stopCondition = (node: ts.Node): boolean => {
      const isClassLike = ts.isClassDeclaration(node) || ts.isClassExpression(node);
      const isFunctionLike = ts.isFunctionDeclaration(node) || ts.isFunctionExpression(node);
      const isModuleDecl = ts.isModuleDeclaration(node);
      return isClassLike || isFunctionLike || isModuleDecl;
    };
    this.forEachNodeInSubtree(scope, callback, stopCondition);
  }

  private handleCommentDirectives(sourceFile: ts.SourceFile): void {

    /*
     * We use a dirty hack to retrieve list of parsed comment directives by accessing
     * internal properties of SourceFile node.
     */

    // Handle comment directive '@ts-nocheck'
    const pragmas = sourceFile.pragmas;
    if (pragmas && pragmas instanceof Map) {
      const noCheckPragma: PragmaPseudoMap[keyof PragmaPseudoMap] | PragmaPseudoMap[keyof PragmaPseudoMap][] = pragmas.get('ts-nocheck');
      if (noCheckPragma) {
        /*
         * The value is either a single entry or an array of entries.
         * Wrap up single entry with array to simplify processing.
         */
        const noCheckEntries = Array.isArray(noCheckPragma) ? noCheckPragma : [noCheckPragma];
        for (const entry of noCheckEntries) {
          this.processNoCheckEntry(entry);
        }
      }
    }

    // Handle comment directives '@ts-ignore' and '@ts-expect-error'
    const commentDirectives = sourceFile.commentDirectives;
    if (commentDirectives && Array.isArray(commentDirectives)) {
      for (const directive of commentDirectives) {
        if (directive.range?.pos === undefined || directive.range?.end === undefined) {
          continue;
        }

        const range = directive.range as ts.TextRange;
        const kind: ts.SyntaxKind =
          sourceFile.text.slice(range.pos, range.pos + 2) === '/*' ?
            ts.SyntaxKind.MultiLineCommentTrivia :
            ts.SyntaxKind.SingleLineCommentTrivia;
        const commentRange: ts.CommentRange = {
          pos: range.pos,
          end: range.end,
          kind
        };

        this.incrementCounters(commentRange, FaultID.ErrorSuppression);
      }
    }
  }

  private handleClassStaticBlockDeclaration(node: ts.Node): void {
    if (this.skipArkTSStaticBlocksCheck) {
      return;
    }
    const classStaticBlockDecl = node as ts.ClassStaticBlockDeclaration;
    if (!ts.isClassDeclaration(classStaticBlockDecl.parent)) {
      return;
    }
    this.reportThisKeywordsInScope(classStaticBlockDecl.body);
  }

  private handleIndexSignature(node: ts.Node): void {
    if (!Utils.isAllowedIndexSignature(node as ts.IndexSignatureDeclaration)) {
      this.incrementCounters(node, FaultID.IndexMember);
    }
  }

  public lint(): void {
    this.visitSourceFile(this.sourceFile);
    this.handleCommentDirectives(this.sourceFile);
  }

  private handleExportKeyword(node: ts.Node): void {
    const parentNode = node.parent;
    if (!TypeScriptLinter.inSharedModule(node) || ts.isModuleBlock(parentNode.parent)) {
      return;
    }

    switch (parentNode.kind) {
      case ts.SyntaxKind.EnumDeclaration:
        if (Utils.isConstEnum(parentNode.symbol)) {
          break;
        } else {
          this.incrementCounters((parentNode as ts.NamedDeclaration).name ?? parentNode, FaultID.SharedModuleExports);
        }
        return;
      case ts.SyntaxKind.InterfaceDeclaration:
      case ts.SyntaxKind.FunctionDeclaration:
      case ts.SyntaxKind.ClassDeclaration:
        if (!Utils.isShareableType(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(parentNode))) {
          this.incrementCounters((parentNode as ts.NamedDeclaration).name ?? parentNode, FaultID.SharedModuleExports);
        }
        return;
      case ts.SyntaxKind.VariableStatement:
        for (const variableDeclaration of (parentNode as ts.VariableStatement).declarationList.declarations) {
          if (!Utils.isShareableEntity(variableDeclaration.name)) {
            this.incrementCounters(variableDeclaration.name, FaultID.SharedModuleExports);
          }
        }
        return;
      case ts.SyntaxKind.TypeAliasDeclaration:
        if (!Utils.isShareableEntity(parentNode)) {
          this.incrementCounters(parentNode, FaultID.SharedModuleExportsWarning);
        }
        return;
      default:
        this.incrementCounters(parentNode, FaultID.SharedModuleExports);
    }
  }

  private handleExportDeclaration(node: ts.Node): void {
    if (!TypeScriptLinter.inSharedModule(node) || ts.isModuleBlock(node.parent)) {
      return;
    }

    const exportDecl = node as ts.ExportDeclaration;
    if (exportDecl.exportClause === undefined) {
      this.incrementCounters(exportDecl, FaultID.SharedModuleNoWildcardExport);
      return;
    }

    if (ts.isNamespaceExport(exportDecl.exportClause)) {
      if (!Utils.isShareableType(TypeScriptLinter.tsTypeChecker.getTypeAtLocation(exportDecl.exportClause.name))) {
        this.incrementCounters(exportDecl.exportClause.name, FaultID.SharedModuleExports);
      }
      return;
    }

    for (const exportSpecifier of exportDecl.exportClause.elements) {
      if (!Utils.isShareableEntity(exportSpecifier.name)) {
        this.incrementCounters(exportSpecifier.name, FaultID.SharedModuleExports);
      }
    }
  }

  private handleReturnStatement(node: ts.Node): void {
    // The return value must match the return type of the 'function'
    const returnStat = node as ts.ReturnStatement;
    const expr = returnStat.expression;
    if (!expr) {
      return;
    }
    const lhsType = TypeScriptLinter.tsTypeChecker.getContextualType(expr);
    if (!lhsType) {
      return;
    }
    this.checkAssignmentMatching(node, lhsType, expr, true);
  }

  /**
   * 'arkts-no-structural-typing' check was missing in some scenarios,
   * in order not to cause incompatibility,
   * only need to strictly match the type of filling the check again
   */
  private checkAssignmentMatching(
    field: ts.Node,
    lhsType: ts.Type,
    rhsExpr: ts.Expression,
    isMissStructural: boolean = false
  ): void {
    const rhsType = TypeScriptLinter.tsTypeChecker.getTypeAtLocation(rhsExpr);
    // check that 'sendable typeAlias' is assigned correctly
    if (Utils.isWrongSendableFunctionAssignment(lhsType, rhsType)) {
      this.incrementCounters(field, FaultID.SendableFunctionAssignment);
    }
    const isStrict = Utils.needStrictMatchType(lhsType, rhsType);
    // 'isMissStructural' means that this assignment scenario was previously omitted, so only strict matches are checked now
    if (isMissStructural && !isStrict) {
      return;
    }
    if (Utils.needToDeduceStructuralIdentity(lhsType, rhsType, rhsExpr, isStrict)) {
      this.incrementCounters(field, FaultID.StructuralIdentity);
    }
  }

  private handleDecorator(node: ts.Node): void {
    const decorator: ts.Decorator = node as ts.Decorator;
    if (Utils.getDecoratorName(decorator) === Utils.SENDABLE_DECORATOR) {
      const parent: ts.Node = decorator.parent;
      if (!parent || !Utils.SENDABLE_DECORATOR_NODES.includes(parent.kind)) {
        this.incrementCounters(decorator, FaultID.SendableDecoratorLimited);
      }
    }
  }

  private isSendableDecoratorValid(decl: ts.FunctionDeclaration | ts.TypeAliasDeclaration): boolean {
    if (
      this.compatibleSdkVersion > 12 ||
      this.compatibleSdkVersion === 12 && (this.compatibleSdkVersionStage !== 'beta1' && this.compatibleSdkVersionStage !== 'beta2')
    ) {
      return true;
    }
    const curDecorator = Utils.getSendableDecorator(decl);
    if (curDecorator) {
      this.incrementCounters(curDecorator, FaultID.SendableBetaCompatible);
    }
    return false;
  }
}
}
}