How to use eslint-scope - 10 common examples

TSModuleDeclaration(node) {
        const astRoot = this.scopeManager.globalScope.block;
        const scope = this.currentScope();
        const { id, body } = node;

        // https://github.com/JamesHenry/typescript-estree/issues/27
        if (isGlobalAugmentation(node, astRoot.tokens)) {
            this.visitGlobalAugmentation(node);
            return;
        }

        if (id && id.type === "Identifier") {
            scope.__define(
                id,
                new Definition("NamespaceName", id, node, null, null, null)
            );
        }
        this.visit(body);
    }

TSEnumMember(node) {
        const { id, initializer } = node;
        const scope = this.currentScope();

        scope.__define(id, new Definition("EnumMemberName", id, node));

        // Set `eslintUsed` flag to the defined variable because the enum member is obviously exported.
        const variable = scope.set.get(id.name);
        variable.eslintUsed = true;

        if (initializer) {
            scope.__referencing(
                id,
                Reference.WRITE,
                initializer,
                null,
                false,
                true
            );
            this.visit(initializer);
        }

TSEmptyBodyFunctionDeclaration(node) {
        const upperTypeMode = this.typeMode;
        const scope = this.currentScope();
        const { id, typeParameters, params, returnType } = node;

        // Ignore this if other overloadings have already existed.
        const variable = scope.set.get(id.name);
        const defs = variable && variable.defs;
        const existed = defs && defs.some(d => d.type === "FunctionName");
        if (!existed) {
            scope.__define(
                id,
                new Definition("FunctionName", id, node, null, null, null)
            );
        }

        // Find `typeof` expressions.
        this.typeMode = true;
        this.visit(typeParameters);
        params.forEach(this.visit, this);
        this.visit(returnType);
        this.typeMode = upperTypeMode;
    }
    TSEmptyBodyDeclareFunction(node) {

TSEnumMember(node) {
        const { id, initializer } = node;
        const scope = this.currentScope();

        scope.__define(id, new Definition("EnumMemberName", id, node));

        // Set `eslintUsed` flag to the defined variable because the enum member is obviously exported.
        const variable = scope.set.get(id.name);
        variable.eslintUsed = true;

        if (initializer) {
            scope.__referencing(
                id,
                Reference.WRITE,
                initializer,
                null,
                false,
                true
            );
            this.visit(initializer);
        }
    }

// parse global comments and modify config
        if (allowInlineConfig !== false) {
            const modifyConfigResult = modifyConfigsFromComments(filename, sourceCode.ast, config, this);

            config = modifyConfigResult.config;
            modifyConfigResult.problems.forEach(problem => problems.push(problem));
            disableDirectives = modifyConfigResult.disableDirectives;
        } else {
            disableDirectives = [];
        }

        const emitter = createEmitter();
        const traverser = new Traverser();
        const ecmaFeatures = config.parserOptions.ecmaFeatures || {};
        const ecmaVersion = config.parserOptions.ecmaVersion || 5;
        const scopeManager = eslintScope.analyze(sourceCode.ast, {
            ignoreEval: true,
            nodejsScope: ecmaFeatures.globalReturn,
            impliedStrict: ecmaFeatures.impliedStrict,
            ecmaVersion,
            sourceType: config.parserOptions.sourceType || "script",
            fallback: Traverser.getKeys
        });

        /*
         * Create a frozen object with the ruleContext properties and methods that are shared by all rules.
         * All rule contexts will inherit from this object. This avoids the performance penalty of copying all the
         * properties once for each rule.
         */
        const sharedTraversalContext = Object.freeze(
            Object.assign(
                Object.create(BASE_TRAVERSAL_CONTEXT),

for (var j = 0; j < node.typeParameters.params.length; j++) {
      var name = node.typeParameters.params[j];
      scope.__define(name, new Definition('TypeParameter', name, name));
      if (name.typeAnnotation) {
        checkIdentifierOrVisit.call(this, name);
      }
    }
    scope.__define = function() {
      return parentScope.__define.apply(parentScope, arguments);
    };
    return scope;
  }

  // visit decorators that are in: ClassDeclaration / ClassExpression
  var { visitClass } = referencer.prototype;
  referencer.prototype.visitClass = function(node) {
    visitDecorators.call(this, node);
    var typeParamScope;
    if (node.typeParameters) {
      typeParamScope = nestTypeParamScope.call(this, this.scopeManager, node);
    }
    // visit flow type: ClassImplements
    if (node.implements) {
      for (var i = 0; i < node.implements.length; i++) {
        checkIdentifierOrVisit.call(this, node.implements[i]);
      }
    }
    if (node.superTypeParameters) {
      for (var k = 0; k < node.superTypeParameters.params.length; k++) {
        checkIdentifierOrVisit.call(this, node.superTypeParameters.params[k]);
      }
    }

createScopeVariable.call(this, node, node.id);
    var typeParamScope;
    if (node.typeParameters) {
      typeParamScope = nestTypeParamScope.call(this, this.scopeManager, node);
    }
    // TODO: Handle mixins
    for (var i = 0; i < node.extends.length; i++) {
      visitTypeAnnotation.call(this, node.extends[i]);
    }
    visitTypeAnnotation.call(this, node.body);
    if (typeParamScope) {
      this.close(node);
    }
  };

  referencer.prototype.TypeAlias = function(node) {
    createScopeVariable.call(this, node, node.id);
    var typeParamScope;
    if (node.typeParameters) {
      typeParamScope = nestTypeParamScope.call(this, this.scopeManager, node);
    }
    if (node.right) {
      visitTypeAnnotation.call(this, node.right);
    }
    if (typeParamScope) {
      this.close(node);
    }
  };

  referencer.prototype.DeclareModule = referencer.prototype.DeclareFunction = referencer.prototype.DeclareVariable = referencer.prototype.DeclareClass = function(
    node
  ) {

}
    }
    if (node.superTypeParameters) {
      for (var k = 0; k < node.superTypeParameters.params.length; k++) {
        checkIdentifierOrVisit.call(this, node.superTypeParameters.params[k]);
      }
    }
    visitClass.call(this, node);
    if (typeParamScope) {
      this.close(node);
    }
  };

  // visit decorators that are in: Property / MethodDefinition
  var { visitProperty } = referencer.prototype;
  referencer.prototype.visitProperty = function(node) {
    if (node.value && node.value.type === 'TypeCastExpression') {
      visitTypeAnnotation.call(this, node.value);
    }
    visitDecorators.call(this, node);
    visitProperty.call(this, node);
  };

  function visitClassProperty(node) {
    if (node.typeAnnotation) {
      visitTypeAnnotation.call(this, node.typeAnnotation);
    }
    this.visitProperty(node);
  }

  // visit ClassProperty as a Property.
  referencer.prototype.ClassProperty = visitClassProperty;

if (node.value && node.value.type === 'TypeCastExpression') {
      visitTypeAnnotation.call(this, node.value);
    }
    visitDecorators.call(this, node);
    visitProperty.call(this, node);
  };

  function visitClassProperty(node) {
    if (node.typeAnnotation) {
      visitTypeAnnotation.call(this, node.typeAnnotation);
    }
    this.visitProperty(node);
  }

  // visit ClassProperty as a Property.
  referencer.prototype.ClassProperty = visitClassProperty;

  // visit ClassPrivateProperty as a Property.
  referencer.prototype.ClassPrivateProperty = visitClassProperty;

  // visit flow type in FunctionDeclaration, FunctionExpression, ArrowFunctionExpression
  var { visitFunction } = referencer.prototype;
  referencer.prototype.visitFunction = function(node) {
    var typeParamScope;
    if (node.typeParameters) {
      typeParamScope = nestTypeParamScope.call(this, this.scopeManager, node);
    }
    if (node.returnType) {
      checkIdentifierOrVisit.call(this, node.returnType);
    }
    // only visit if function parameters have types
    if (node.params) {

visitDecorators.call(this, node);
    visitProperty.call(this, node);
  };

  function visitClassProperty(node) {
    if (node.typeAnnotation) {
      visitTypeAnnotation.call(this, node.typeAnnotation);
    }
    this.visitProperty(node);
  }

  // visit ClassProperty as a Property.
  referencer.prototype.ClassProperty = visitClassProperty;

  // visit ClassPrivateProperty as a Property.
  referencer.prototype.ClassPrivateProperty = visitClassProperty;

  // visit flow type in FunctionDeclaration, FunctionExpression, ArrowFunctionExpression
  var { visitFunction } = referencer.prototype;
  referencer.prototype.visitFunction = function(node) {
    var typeParamScope;
    if (node.typeParameters) {
      typeParamScope = nestTypeParamScope.call(this, this.scopeManager, node);
    }
    if (node.returnType) {
      checkIdentifierOrVisit.call(this, node.returnType);
    }
    // only visit if function parameters have types
    if (node.params) {
      for (var i = 0; i < node.params.length; i++) {
        var param = node.params[i];
        if (param.typeAnnotation) {