timepiece/node_modules/@babel/traverse/lib/scope/index.js

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2024-05-14 14:54:12 +00:00
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _renamer = require("./lib/renamer.js");
var _index = require("../index.js");
var _binding = require("./binding.js");
var _globals = require("globals");
var _t = require("@babel/types");
var t = _t;
var _cache = require("../cache.js");
var _visitors = require("../visitors.js");
const {
NOT_LOCAL_BINDING,
callExpression,
cloneNode,
getBindingIdentifiers,
identifier,
isArrayExpression,
isBinary,
isClass,
isClassBody,
isClassDeclaration,
isExportAllDeclaration,
isExportDefaultDeclaration,
isExportNamedDeclaration,
isFunctionDeclaration,
isIdentifier,
isImportDeclaration,
isLiteral,
isMethod,
isModuleSpecifier,
isNullLiteral,
isObjectExpression,
isProperty,
isPureish,
isRegExpLiteral,
isSuper,
isTaggedTemplateExpression,
isTemplateLiteral,
isThisExpression,
isUnaryExpression,
isVariableDeclaration,
matchesPattern,
memberExpression,
numericLiteral,
toIdentifier,
variableDeclaration,
variableDeclarator,
isRecordExpression,
isTupleExpression,
isObjectProperty,
isTopicReference,
isMetaProperty,
isPrivateName,
isExportDeclaration,
buildUndefinedNode
} = _t;
function gatherNodeParts(node, parts) {
switch (node == null ? void 0 : node.type) {
default:
if (isImportDeclaration(node) || isExportDeclaration(node)) {
var _node$specifiers;
if ((isExportAllDeclaration(node) || isExportNamedDeclaration(node) || isImportDeclaration(node)) && node.source) {
gatherNodeParts(node.source, parts);
} else if ((isExportNamedDeclaration(node) || isImportDeclaration(node)) && (_node$specifiers = node.specifiers) != null && _node$specifiers.length) {
for (const e of node.specifiers) gatherNodeParts(e, parts);
} else if ((isExportDefaultDeclaration(node) || isExportNamedDeclaration(node)) && node.declaration) {
gatherNodeParts(node.declaration, parts);
}
} else if (isModuleSpecifier(node)) {
gatherNodeParts(node.local, parts);
} else if (isLiteral(node) && !isNullLiteral(node) && !isRegExpLiteral(node) && !isTemplateLiteral(node)) {
parts.push(node.value);
}
break;
case "MemberExpression":
case "OptionalMemberExpression":
case "JSXMemberExpression":
gatherNodeParts(node.object, parts);
gatherNodeParts(node.property, parts);
break;
case "Identifier":
case "JSXIdentifier":
parts.push(node.name);
break;
case "CallExpression":
case "OptionalCallExpression":
case "NewExpression":
gatherNodeParts(node.callee, parts);
break;
case "ObjectExpression":
case "ObjectPattern":
for (const e of node.properties) {
gatherNodeParts(e, parts);
}
break;
case "SpreadElement":
case "RestElement":
gatherNodeParts(node.argument, parts);
break;
case "ObjectProperty":
case "ObjectMethod":
case "ClassProperty":
case "ClassMethod":
case "ClassPrivateProperty":
case "ClassPrivateMethod":
gatherNodeParts(node.key, parts);
break;
case "ThisExpression":
parts.push("this");
break;
case "Super":
parts.push("super");
break;
case "Import":
parts.push("import");
break;
case "DoExpression":
parts.push("do");
break;
case "YieldExpression":
parts.push("yield");
gatherNodeParts(node.argument, parts);
break;
case "AwaitExpression":
parts.push("await");
gatherNodeParts(node.argument, parts);
break;
case "AssignmentExpression":
gatherNodeParts(node.left, parts);
break;
case "VariableDeclarator":
gatherNodeParts(node.id, parts);
break;
case "FunctionExpression":
case "FunctionDeclaration":
case "ClassExpression":
case "ClassDeclaration":
gatherNodeParts(node.id, parts);
break;
case "PrivateName":
gatherNodeParts(node.id, parts);
break;
case "ParenthesizedExpression":
gatherNodeParts(node.expression, parts);
break;
case "UnaryExpression":
case "UpdateExpression":
gatherNodeParts(node.argument, parts);
break;
case "MetaProperty":
gatherNodeParts(node.meta, parts);
gatherNodeParts(node.property, parts);
break;
case "JSXElement":
gatherNodeParts(node.openingElement, parts);
break;
case "JSXOpeningElement":
gatherNodeParts(node.name, parts);
break;
case "JSXFragment":
gatherNodeParts(node.openingFragment, parts);
break;
case "JSXOpeningFragment":
parts.push("Fragment");
break;
case "JSXNamespacedName":
gatherNodeParts(node.namespace, parts);
gatherNodeParts(node.name, parts);
break;
}
}
const collectorVisitor = {
ForStatement(path) {
const declar = path.get("init");
if (declar.isVar()) {
const {
scope
} = path;
const parentScope = scope.getFunctionParent() || scope.getProgramParent();
parentScope.registerBinding("var", declar);
}
},
Declaration(path) {
if (path.isBlockScoped()) return;
if (path.isImportDeclaration()) return;
if (path.isExportDeclaration()) return;
const parent = path.scope.getFunctionParent() || path.scope.getProgramParent();
parent.registerDeclaration(path);
},
ImportDeclaration(path) {
const parent = path.scope.getBlockParent();
parent.registerDeclaration(path);
},
ReferencedIdentifier(path, state) {
state.references.push(path);
},
ForXStatement(path, state) {
const left = path.get("left");
if (left.isPattern() || left.isIdentifier()) {
state.constantViolations.push(path);
} else if (left.isVar()) {
const {
scope
} = path;
const parentScope = scope.getFunctionParent() || scope.getProgramParent();
parentScope.registerBinding("var", left);
}
},
ExportDeclaration: {
exit(path) {
const {
node,
scope
} = path;
if (isExportAllDeclaration(node)) return;
const declar = node.declaration;
if (isClassDeclaration(declar) || isFunctionDeclaration(declar)) {
const id = declar.id;
if (!id) return;
const binding = scope.getBinding(id.name);
binding == null || binding.reference(path);
} else if (isVariableDeclaration(declar)) {
for (const decl of declar.declarations) {
for (const name of Object.keys(getBindingIdentifiers(decl))) {
const binding = scope.getBinding(name);
binding == null || binding.reference(path);
}
}
}
}
},
LabeledStatement(path) {
path.scope.getBlockParent().registerDeclaration(path);
},
AssignmentExpression(path, state) {
state.assignments.push(path);
},
UpdateExpression(path, state) {
state.constantViolations.push(path);
},
UnaryExpression(path, state) {
if (path.node.operator === "delete") {
state.constantViolations.push(path);
}
},
BlockScoped(path) {
let scope = path.scope;
if (scope.path === path) scope = scope.parent;
const parent = scope.getBlockParent();
parent.registerDeclaration(path);
if (path.isClassDeclaration() && path.node.id) {
const id = path.node.id;
const name = id.name;
path.scope.bindings[name] = path.scope.parent.getBinding(name);
}
},
CatchClause(path) {
path.scope.registerBinding("let", path);
},
Function(path) {
const params = path.get("params");
for (const param of params) {
path.scope.registerBinding("param", param);
}
if (path.isFunctionExpression() && path.has("id") && !path.get("id").node[NOT_LOCAL_BINDING]) {
path.scope.registerBinding("local", path.get("id"), path);
}
},
ClassExpression(path) {
if (path.has("id") && !path.get("id").node[NOT_LOCAL_BINDING]) {
path.scope.registerBinding("local", path);
}
}
};
let uid = 0;
class Scope {
constructor(path) {
this.uid = void 0;
this.path = void 0;
this.block = void 0;
this.labels = void 0;
this.inited = void 0;
this.bindings = void 0;
this.references = void 0;
this.globals = void 0;
this.uids = void 0;
this.data = void 0;
this.crawling = void 0;
const {
node
} = path;
const cached = _cache.scope.get(node);
if ((cached == null ? void 0 : cached.path) === path) {
return cached;
}
_cache.scope.set(node, this);
this.uid = uid++;
this.block = node;
this.path = path;
this.labels = new Map();
this.inited = false;
}
get parent() {
var _parent;
let parent,
path = this.path;
do {
const shouldSkip = path.key === "key" || path.listKey === "decorators";
path = path.parentPath;
if (shouldSkip && path.isMethod()) path = path.parentPath;
if (path && path.isScope()) parent = path;
} while (path && !parent);
return (_parent = parent) == null ? void 0 : _parent.scope;
}
get parentBlock() {
return this.path.parent;
}
get hub() {
return this.path.hub;
}
traverse(node, opts, state) {
(0, _index.default)(node, opts, this, state, this.path);
}
generateDeclaredUidIdentifier(name) {
const id = this.generateUidIdentifier(name);
this.push({
id
});
return cloneNode(id);
}
generateUidIdentifier(name) {
return identifier(this.generateUid(name));
}
generateUid(name = "temp") {
name = toIdentifier(name).replace(/^_+/, "").replace(/[0-9]+$/g, "");
let uid;
let i = 1;
do {
uid = this._generateUid(name, i);
i++;
} while (this.hasLabel(uid) || this.hasBinding(uid) || this.hasGlobal(uid) || this.hasReference(uid));
const program = this.getProgramParent();
program.references[uid] = true;
program.uids[uid] = true;
return uid;
}
_generateUid(name, i) {
let id = name;
if (i > 1) id += i;
return `_${id}`;
}
generateUidBasedOnNode(node, defaultName) {
const parts = [];
gatherNodeParts(node, parts);
let id = parts.join("$");
id = id.replace(/^_/, "") || defaultName || "ref";
return this.generateUid(id.slice(0, 20));
}
generateUidIdentifierBasedOnNode(node, defaultName) {
return identifier(this.generateUidBasedOnNode(node, defaultName));
}
isStatic(node) {
if (isThisExpression(node) || isSuper(node) || isTopicReference(node)) {
return true;
}
if (isIdentifier(node)) {
const binding = this.getBinding(node.name);
if (binding) {
return binding.constant;
} else {
return this.hasBinding(node.name);
}
}
return false;
}
maybeGenerateMemoised(node, dontPush) {
if (this.isStatic(node)) {
return null;
} else {
const id = this.generateUidIdentifierBasedOnNode(node);
if (!dontPush) {
this.push({
id
});
return cloneNode(id);
}
return id;
}
}
checkBlockScopedCollisions(local, kind, name, id) {
if (kind === "param") return;
if (local.kind === "local") return;
const duplicate = kind === "let" || local.kind === "let" || local.kind === "const" || local.kind === "module" || local.kind === "param" && kind === "const";
if (duplicate) {
throw this.hub.buildError(id, `Duplicate declaration "${name}"`, TypeError);
}
}
rename(oldName, newName) {
const binding = this.getBinding(oldName);
if (binding) {
newName || (newName = this.generateUidIdentifier(oldName).name);
const renamer = new _renamer.default(binding, oldName, newName);
{
renamer.rename(arguments[2]);
}
}
}
_renameFromMap(map, oldName, newName, value) {
if (map[oldName]) {
map[newName] = value;
map[oldName] = null;
}
}
dump() {
const sep = "-".repeat(60);
console.log(sep);
let scope = this;
do {
console.log("#", scope.block.type);
for (const name of Object.keys(scope.bindings)) {
const binding = scope.bindings[name];
console.log(" -", name, {
constant: binding.constant,
references: binding.references,
violations: binding.constantViolations.length,
kind: binding.kind
});
}
} while (scope = scope.parent);
console.log(sep);
}
toArray(node, i, arrayLikeIsIterable) {
if (isIdentifier(node)) {
const binding = this.getBinding(node.name);
if (binding != null && binding.constant && binding.path.isGenericType("Array")) {
return node;
}
}
if (isArrayExpression(node)) {
return node;
}
if (isIdentifier(node, {
name: "arguments"
})) {
return callExpression(memberExpression(memberExpression(memberExpression(identifier("Array"), identifier("prototype")), identifier("slice")), identifier("call")), [node]);
}
let helperName;
const args = [node];
if (i === true) {
helperName = "toConsumableArray";
} else if (typeof i === "number") {
args.push(numericLiteral(i));
helperName = "slicedToArray";
} else {
helperName = "toArray";
}
if (arrayLikeIsIterable) {
args.unshift(this.hub.addHelper(helperName));
helperName = "maybeArrayLike";
}
return callExpression(this.hub.addHelper(helperName), args);
}
hasLabel(name) {
return !!this.getLabel(name);
}
getLabel(name) {
return this.labels.get(name);
}
registerLabel(path) {
this.labels.set(path.node.label.name, path);
}
registerDeclaration(path) {
if (path.isLabeledStatement()) {
this.registerLabel(path);
} else if (path.isFunctionDeclaration()) {
this.registerBinding("hoisted", path.get("id"), path);
} else if (path.isVariableDeclaration()) {
const declarations = path.get("declarations");
const {
kind
} = path.node;
for (const declar of declarations) {
this.registerBinding(kind === "using" || kind === "await using" ? "const" : kind, declar);
}
} else if (path.isClassDeclaration()) {
if (path.node.declare) return;
this.registerBinding("let", path);
} else if (path.isImportDeclaration()) {
const isTypeDeclaration = path.node.importKind === "type" || path.node.importKind === "typeof";
const specifiers = path.get("specifiers");
for (const specifier of specifiers) {
const isTypeSpecifier = isTypeDeclaration || specifier.isImportSpecifier() && (specifier.node.importKind === "type" || specifier.node.importKind === "typeof");
this.registerBinding(isTypeSpecifier ? "unknown" : "module", specifier);
}
} else if (path.isExportDeclaration()) {
const declar = path.get("declaration");
if (declar.isClassDeclaration() || declar.isFunctionDeclaration() || declar.isVariableDeclaration()) {
this.registerDeclaration(declar);
}
} else {
this.registerBinding("unknown", path);
}
}
buildUndefinedNode() {
return buildUndefinedNode();
}
registerConstantViolation(path) {
const ids = path.getBindingIdentifiers();
for (const name of Object.keys(ids)) {
var _this$getBinding;
(_this$getBinding = this.getBinding(name)) == null || _this$getBinding.reassign(path);
}
}
registerBinding(kind, path, bindingPath = path) {
if (!kind) throw new ReferenceError("no `kind`");
if (path.isVariableDeclaration()) {
const declarators = path.get("declarations");
for (const declar of declarators) {
this.registerBinding(kind, declar);
}
return;
}
const parent = this.getProgramParent();
const ids = path.getOuterBindingIdentifiers(true);
for (const name of Object.keys(ids)) {
parent.references[name] = true;
for (const id of ids[name]) {
const local = this.getOwnBinding(name);
if (local) {
if (local.identifier === id) continue;
this.checkBlockScopedCollisions(local, kind, name, id);
}
if (local) {
this.registerConstantViolation(bindingPath);
} else {
this.bindings[name] = new _binding.default({
identifier: id,
scope: this,
path: bindingPath,
kind: kind
});
}
}
}
}
addGlobal(node) {
this.globals[node.name] = node;
}
hasUid(name) {
let scope = this;
do {
if (scope.uids[name]) return true;
} while (scope = scope.parent);
return false;
}
hasGlobal(name) {
let scope = this;
do {
if (scope.globals[name]) return true;
} while (scope = scope.parent);
return false;
}
hasReference(name) {
return !!this.getProgramParent().references[name];
}
isPure(node, constantsOnly) {
if (isIdentifier(node)) {
const binding = this.getBinding(node.name);
if (!binding) return false;
if (constantsOnly) return binding.constant;
return true;
} else if (isThisExpression(node) || isMetaProperty(node) || isTopicReference(node) || isPrivateName(node)) {
return true;
} else if (isClass(node)) {
var _node$decorators;
if (node.superClass && !this.isPure(node.superClass, constantsOnly)) {
return false;
}
if (((_node$decorators = node.decorators) == null ? void 0 : _node$decorators.length) > 0) {
return false;
}
return this.isPure(node.body, constantsOnly);
} else if (isClassBody(node)) {
for (const method of node.body) {
if (!this.isPure(method, constantsOnly)) return false;
}
return true;
} else if (isBinary(node)) {
return this.isPure(node.left, constantsOnly) && this.isPure(node.right, constantsOnly);
} else if (isArrayExpression(node) || isTupleExpression(node)) {
for (const elem of node.elements) {
if (elem !== null && !this.isPure(elem, constantsOnly)) return false;
}
return true;
} else if (isObjectExpression(node) || isRecordExpression(node)) {
for (const prop of node.properties) {
if (!this.isPure(prop, constantsOnly)) return false;
}
return true;
} else if (isMethod(node)) {
var _node$decorators2;
if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
if (((_node$decorators2 = node.decorators) == null ? void 0 : _node$decorators2.length) > 0) {
return false;
}
return true;
} else if (isProperty(node)) {
var _node$decorators3;
if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
if (((_node$decorators3 = node.decorators) == null ? void 0 : _node$decorators3.length) > 0) {
return false;
}
if (isObjectProperty(node) || node.static) {
if (node.value !== null && !this.isPure(node.value, constantsOnly)) {
return false;
}
}
return true;
} else if (isUnaryExpression(node)) {
return this.isPure(node.argument, constantsOnly);
} else if (isTaggedTemplateExpression(node)) {
return matchesPattern(node.tag, "String.raw") && !this.hasBinding("String", true) && this.isPure(node.quasi, constantsOnly);
} else if (isTemplateLiteral(node)) {
for (const expression of node.expressions) {
if (!this.isPure(expression, constantsOnly)) return false;
}
return true;
} else {
return isPureish(node);
}
}
setData(key, val) {
return this.data[key] = val;
}
getData(key) {
let scope = this;
do {
const data = scope.data[key];
if (data != null) return data;
} while (scope = scope.parent);
}
removeData(key) {
let scope = this;
do {
const data = scope.data[key];
if (data != null) scope.data[key] = null;
} while (scope = scope.parent);
}
init() {
if (!this.inited) {
this.inited = true;
this.crawl();
}
}
crawl() {
const path = this.path;
this.references = Object.create(null);
this.bindings = Object.create(null);
this.globals = Object.create(null);
this.uids = Object.create(null);
this.data = Object.create(null);
const programParent = this.getProgramParent();
if (programParent.crawling) return;
const state = {
references: [],
constantViolations: [],
assignments: []
};
this.crawling = true;
if (path.type !== "Program" && (0, _visitors.isExplodedVisitor)(collectorVisitor)) {
for (const visit of collectorVisitor.enter) {
visit.call(state, path, state);
}
const typeVisitors = collectorVisitor[path.type];
if (typeVisitors) {
for (const visit of typeVisitors.enter) {
visit.call(state, path, state);
}
}
}
path.traverse(collectorVisitor, state);
this.crawling = false;
for (const path of state.assignments) {
const ids = path.getBindingIdentifiers();
for (const name of Object.keys(ids)) {
if (path.scope.getBinding(name)) continue;
programParent.addGlobal(ids[name]);
}
path.scope.registerConstantViolation(path);
}
for (const ref of state.references) {
const binding = ref.scope.getBinding(ref.node.name);
if (binding) {
binding.reference(ref);
} else {
programParent.addGlobal(ref.node);
}
}
for (const path of state.constantViolations) {
path.scope.registerConstantViolation(path);
}
}
push(opts) {
let path = this.path;
if (path.isPattern()) {
path = this.getPatternParent().path;
} else if (!path.isBlockStatement() && !path.isProgram()) {
path = this.getBlockParent().path;
}
if (path.isSwitchStatement()) {
path = (this.getFunctionParent() || this.getProgramParent()).path;
}
const {
init,
unique,
kind = "var",
id
} = opts;
if (!init && !unique && (kind === "var" || kind === "let") && path.isFunction() && !path.node.name && t.isCallExpression(path.parent, {
callee: path.node
}) && path.parent.arguments.length <= path.node.params.length && t.isIdentifier(id)) {
path.pushContainer("params", id);
path.scope.registerBinding("param", path.get("params")[path.node.params.length - 1]);
return;
}
if (path.isLoop() || path.isCatchClause() || path.isFunction()) {
path.ensureBlock();
path = path.get("body");
}
const blockHoist = opts._blockHoist == null ? 2 : opts._blockHoist;
const dataKey = `declaration:${kind}:${blockHoist}`;
let declarPath = !unique && path.getData(dataKey);
if (!declarPath) {
const declar = variableDeclaration(kind, []);
declar._blockHoist = blockHoist;
[declarPath] = path.unshiftContainer("body", [declar]);
if (!unique) path.setData(dataKey, declarPath);
}
const declarator = variableDeclarator(id, init);
const len = declarPath.node.declarations.push(declarator);
path.scope.registerBinding(kind, declarPath.get("declarations")[len - 1]);
}
getProgramParent() {
let scope = this;
do {
if (scope.path.isProgram()) {
return scope;
}
} while (scope = scope.parent);
throw new Error("Couldn't find a Program");
}
getFunctionParent() {
let scope = this;
do {
if (scope.path.isFunctionParent()) {
return scope;
}
} while (scope = scope.parent);
return null;
}
getBlockParent() {
let scope = this;
do {
if (scope.path.isBlockParent()) {
return scope;
}
} while (scope = scope.parent);
throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
}
getPatternParent() {
let scope = this;
do {
if (!scope.path.isPattern()) {
return scope.getBlockParent();
}
} while (scope = scope.parent.parent);
throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
}
getAllBindings() {
const ids = Object.create(null);
let scope = this;
do {
for (const key of Object.keys(scope.bindings)) {
if (key in ids === false) {
ids[key] = scope.bindings[key];
}
}
scope = scope.parent;
} while (scope);
return ids;
}
getAllBindingsOfKind(...kinds) {
const ids = Object.create(null);
for (const kind of kinds) {
let scope = this;
do {
for (const name of Object.keys(scope.bindings)) {
const binding = scope.bindings[name];
if (binding.kind === kind) ids[name] = binding;
}
scope = scope.parent;
} while (scope);
}
return ids;
}
bindingIdentifierEquals(name, node) {
return this.getBindingIdentifier(name) === node;
}
getBinding(name) {
let scope = this;
let previousPath;
do {
const binding = scope.getOwnBinding(name);
if (binding) {
var _previousPath;
if ((_previousPath = previousPath) != null && _previousPath.isPattern() && binding.kind !== "param" && binding.kind !== "local") {} else {
return binding;
}
} else if (!binding && name === "arguments" && scope.path.isFunction() && !scope.path.isArrowFunctionExpression()) {
break;
}
previousPath = scope.path;
} while (scope = scope.parent);
}
getOwnBinding(name) {
return this.bindings[name];
}
getBindingIdentifier(name) {
var _this$getBinding2;
return (_this$getBinding2 = this.getBinding(name)) == null ? void 0 : _this$getBinding2.identifier;
}
getOwnBindingIdentifier(name) {
const binding = this.bindings[name];
return binding == null ? void 0 : binding.identifier;
}
hasOwnBinding(name) {
return !!this.getOwnBinding(name);
}
hasBinding(name, opts) {
var _opts, _opts2, _opts3;
if (!name) return false;
if (this.hasOwnBinding(name)) return true;
{
if (typeof opts === "boolean") opts = {
noGlobals: opts
};
}
if (this.parentHasBinding(name, opts)) return true;
if (!((_opts = opts) != null && _opts.noUids) && this.hasUid(name)) return true;
if (!((_opts2 = opts) != null && _opts2.noGlobals) && Scope.globals.includes(name)) return true;
if (!((_opts3 = opts) != null && _opts3.noGlobals) && Scope.contextVariables.includes(name)) return true;
return false;
}
parentHasBinding(name, opts) {
var _this$parent;
return (_this$parent = this.parent) == null ? void 0 : _this$parent.hasBinding(name, opts);
}
moveBindingTo(name, scope) {
const info = this.getBinding(name);
if (info) {
info.scope.removeOwnBinding(name);
info.scope = scope;
scope.bindings[name] = info;
}
}
removeOwnBinding(name) {
delete this.bindings[name];
}
removeBinding(name) {
var _this$getBinding3;
(_this$getBinding3 = this.getBinding(name)) == null || _this$getBinding3.scope.removeOwnBinding(name);
let scope = this;
do {
if (scope.uids[name]) {
scope.uids[name] = false;
}
} while (scope = scope.parent);
}
}
exports.default = Scope;
Scope.globals = Object.keys(_globals.builtin);
Scope.contextVariables = ["arguments", "undefined", "Infinity", "NaN"];
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