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MIT License
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Copyright (c) 2014-present Sebastian McKenzie and other contributors
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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# @babel/plugin-transform-private-property-in-object
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> This plugin transforms checks for a private property in an object
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See our website [@babel/plugin-transform-private-property-in-object](https://babeljs.io/docs/babel-plugin-transform-private-property-in-object) for more information.
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## Install
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Using npm:
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```sh
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npm install --save-dev @babel/plugin-transform-private-property-in-object
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```
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or using yarn:
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```sh
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yarn add @babel/plugin-transform-private-property-in-object --dev
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```
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _helperPluginUtils = require("@babel/helper-plugin-utils");
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var _helperCreateClassFeaturesPlugin = require("@babel/helper-create-class-features-plugin");
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var _helperAnnotateAsPure = require("@babel/helper-annotate-as-pure");
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var _default = exports.default = (0, _helperPluginUtils.declare)((api, opt) => {
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api.assertVersion("^7.0.0-0 || ^8.0.0-0 || >8.0.0-alpha <8.0.0-beta");
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const {
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types: t,
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template
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} = api;
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const {
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loose
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} = opt;
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const classWeakSets = new WeakMap();
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const fieldsWeakSets = new WeakMap();
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function unshadow(name, targetScope, scope) {
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while (scope !== targetScope) {
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if (scope.hasOwnBinding(name)) scope.rename(name);
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scope = scope.parent;
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}
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}
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function injectToFieldInit(fieldPath, expr, before = false) {
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if (fieldPath.node.value) {
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const value = fieldPath.get("value");
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if (before) {
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value.insertBefore(expr);
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} else {
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value.insertAfter(expr);
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}
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} else {
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fieldPath.set("value", t.unaryExpression("void", expr));
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}
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}
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function injectInitialization(classPath, init) {
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let firstFieldPath;
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let constructorPath;
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for (const el of classPath.get("body.body")) {
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if ((el.isClassProperty() || el.isClassPrivateProperty()) && !el.node.static) {
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firstFieldPath = el;
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break;
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}
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if (!constructorPath && el.isClassMethod({
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kind: "constructor"
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})) {
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constructorPath = el;
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}
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}
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if (firstFieldPath) {
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injectToFieldInit(firstFieldPath, init, true);
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} else {
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(0, _helperCreateClassFeaturesPlugin.injectInitialization)(classPath, constructorPath, [t.expressionStatement(init)]);
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}
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}
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function getWeakSetId(weakSets, outerClass, reference, name = "", inject) {
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let id = weakSets.get(reference.node);
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if (!id) {
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id = outerClass.scope.generateUidIdentifier(`${name || ""} brandCheck`);
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weakSets.set(reference.node, id);
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inject(reference, template.expression.ast`${t.cloneNode(id)}.add(this)`);
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const newExpr = t.newExpression(t.identifier("WeakSet"), []);
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(0, _helperAnnotateAsPure.default)(newExpr);
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outerClass.insertBefore(template.ast`var ${id} = ${newExpr}`);
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}
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return t.cloneNode(id);
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}
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return {
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name: "transform-private-property-in-object",
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manipulateOptions: (_, parser) => parser.plugins.push("privateIn"),
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pre() {
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(0, _helperCreateClassFeaturesPlugin.enableFeature)(this.file, _helperCreateClassFeaturesPlugin.FEATURES.privateIn, loose);
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},
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visitor: {
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BinaryExpression(path, state) {
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const {
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node
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} = path;
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const {
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file
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} = state;
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if (node.operator !== "in") return;
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if (!t.isPrivateName(node.left)) return;
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const {
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name
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} = node.left.id;
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let privateElement;
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const outerClass = path.findParent(path => {
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if (!path.isClass()) return false;
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privateElement = path.get("body.body").find(({
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node
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}) => t.isPrivate(node) && node.key.id.name === name);
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return !!privateElement;
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});
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if (outerClass.parentPath.scope.path.isPattern()) {
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outerClass.replaceWith(template.ast`(() => ${outerClass.node})()`);
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return;
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}
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if (privateElement.node.type === "ClassPrivateMethod") {
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if (privateElement.node.static) {
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if (outerClass.node.id) {
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unshadow(outerClass.node.id.name, outerClass.scope, path.scope);
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} else {
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outerClass.set("id", path.scope.generateUidIdentifier("class"));
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}
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path.replaceWith(template.expression.ast`
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${t.cloneNode(outerClass.node.id)} === ${(0, _helperCreateClassFeaturesPlugin.buildCheckInRHS)(node.right, file)}
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`);
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} else {
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var _outerClass$node$id;
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const id = getWeakSetId(classWeakSets, outerClass, outerClass, (_outerClass$node$id = outerClass.node.id) == null ? void 0 : _outerClass$node$id.name, injectInitialization);
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path.replaceWith(template.expression.ast`${id}.has(${(0, _helperCreateClassFeaturesPlugin.buildCheckInRHS)(node.right, file)})`);
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}
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} else {
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const id = getWeakSetId(fieldsWeakSets, outerClass, privateElement, privateElement.node.key.id.name, injectToFieldInit);
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path.replaceWith(template.expression.ast`${id}.has(${(0, _helperCreateClassFeaturesPlugin.buildCheckInRHS)(node.right, file)})`);
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}
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}
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}
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};
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});
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//# sourceMappingURL=index.js.map
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Generated
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+1
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{"version":3,"names":["_helperPluginUtils","require","_helperCreateClassFeaturesPlugin","_helperAnnotateAsPure","_default","exports","default","declare","api","opt","assertVersion","types","t","template","loose","classWeakSets","WeakMap","fieldsWeakSets","unshadow","name","targetScope","scope","hasOwnBinding","rename","parent","injectToFieldInit","fieldPath","expr","before","node","value","get","insertBefore","insertAfter","set","unaryExpression","injectInitialization","classPath","init","firstFieldPath","constructorPath","el","isClassProperty","isClassPrivateProperty","static","isClassMethod","kind","injectConstructorInit","expressionStatement","getWeakSetId","weakSets","outerClass","reference","inject","id","generateUidIdentifier","expression","ast","cloneNode","newExpr","newExpression","identifier","annotateAsPure","manipulateOptions","_","parser","plugins","push","pre","enableFeature","file","FEATURES","privateIn","visitor","BinaryExpression","path","state","operator","isPrivateName","left","privateElement","findParent","isClass","find","isPrivate","key","parentPath","isPattern","replaceWith","type","buildCheckInRHS","right","_outerClass$node$id"],"sources":["../src/index.ts"],"sourcesContent":["import { declare } from \"@babel/helper-plugin-utils\";\nimport {\n enableFeature,\n FEATURES,\n injectInitialization as injectConstructorInit,\n buildCheckInRHS,\n} from \"@babel/helper-create-class-features-plugin\";\nimport annotateAsPure from \"@babel/helper-annotate-as-pure\";\nimport type { NodePath, Scope, types as t } from \"@babel/core\";\n\nexport interface Options {\n loose?: boolean;\n}\nexport default declare((api, opt: Options) => {\n api.assertVersion(REQUIRED_VERSION(\"^7.0.0-0 || ^8.0.0-0\"));\n const { types: t, template } = api;\n const { loose } = opt;\n\n // NOTE: When using the class fields or private methods plugins,\n // they will also take care of '#priv in obj' checks when visiting\n // the ClassExpression or ClassDeclaration nodes.\n // The visitor of this plugin is only effective when not compiling\n // private fields and methods.\n\n const classWeakSets = new WeakMap<t.Class, t.Identifier>();\n const fieldsWeakSets = new WeakMap<\n t.ClassPrivateProperty | t.ClassPrivateMethod,\n t.Identifier\n >();\n\n function unshadow(name: string, targetScope: Scope, scope: Scope) {\n while (scope !== targetScope) {\n if (scope.hasOwnBinding(name)) scope.rename(name);\n scope = scope.parent;\n }\n }\n\n function injectToFieldInit(\n fieldPath: NodePath<t.ClassPrivateProperty | t.ClassProperty>,\n expr: t.Expression,\n before = false,\n ) {\n if (fieldPath.node.value) {\n const value = fieldPath.get(\"value\");\n if (before) {\n value.insertBefore(expr);\n } else {\n value.insertAfter(expr);\n }\n } else {\n fieldPath.set(\"value\", t.unaryExpression(\"void\", expr));\n }\n }\n\n function injectInitialization(\n classPath: NodePath<t.Class>,\n init: t.Expression,\n ) {\n let firstFieldPath;\n let constructorPath;\n\n for (const el of classPath.get(\"body.body\")) {\n if (\n (el.isClassProperty() || el.isClassPrivateProperty()) &&\n !el.node.static\n ) {\n firstFieldPath = el;\n break;\n }\n if (!constructorPath && el.isClassMethod({ kind: \"constructor\" })) {\n constructorPath = el;\n }\n }\n\n if (firstFieldPath) {\n injectToFieldInit(firstFieldPath, init, true);\n } else {\n injectConstructorInit(classPath, constructorPath, [\n t.expressionStatement(init),\n ]);\n }\n }\n\n function getWeakSetId<Ref extends t.Node>(\n weakSets: WeakMap<t.Node, t.Identifier>,\n outerClass: NodePath<t.Class>,\n reference: NodePath<Ref>,\n name = \"\",\n inject: (\n reference: NodePath<Ref>,\n expression: t.Expression,\n before?: boolean,\n ) => void,\n ) {\n let id = weakSets.get(reference.node);\n\n if (!id) {\n id = outerClass.scope.generateUidIdentifier(`${name || \"\"} brandCheck`);\n weakSets.set(reference.node, id);\n\n inject(reference, template.expression.ast`${t.cloneNode(id)}.add(this)`);\n\n const newExpr = t.newExpression(t.identifier(\"WeakSet\"), []);\n annotateAsPure(newExpr);\n\n outerClass.insertBefore(template.ast`var ${id} = ${newExpr}`);\n }\n\n return t.cloneNode(id);\n }\n\n return {\n name: \"transform-private-property-in-object\",\n manipulateOptions: process.env.BABEL_8_BREAKING\n ? undefined\n : (_, parser) => parser.plugins.push(\"privateIn\"),\n pre() {\n // Enable this in @babel/helper-create-class-features-plugin, so that it\n // can be handled by the private fields and methods transform.\n enableFeature(this.file, FEATURES.privateIn, loose);\n },\n visitor: {\n BinaryExpression(path, state) {\n const { node } = path;\n const { file } = stLine truncated
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Generated
Vendored
+36
@@ -0,0 +1,36 @@
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{
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"name": "@babel/plugin-transform-private-property-in-object",
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"version": "7.29.7",
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"description": "This plugin transforms checks for a private property in an object",
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"repository": {
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"type": "git",
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"url": "https://github.com/babel/babel.git",
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"directory": "packages/babel-plugin-transform-private-property-in-object"
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},
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"homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-private-property-in-object",
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"license": "MIT",
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"publishConfig": {
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"access": "public"
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},
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"main": "./lib/index.js",
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"keywords": [
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"babel-plugin"
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],
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"dependencies": {
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"@babel/helper-annotate-as-pure": "^7.29.7",
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"@babel/helper-create-class-features-plugin": "^7.29.7",
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"@babel/helper-plugin-utils": "^7.29.7"
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},
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"peerDependencies": {
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"@babel/core": "^7.0.0-0"
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},
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"devDependencies": {
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"@babel/core": "^7.29.7",
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"@babel/helper-plugin-test-runner": "^7.29.7"
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},
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"engines": {
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"node": ">=6.9.0"
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},
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"author": "The Babel Team (https://babel.dev/team)",
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"type": "commonjs"
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}
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