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MIT License
Copyright (c) 2014-present Sebastian McKenzie and other contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# @babel/plugin-proposal-decorators
> Compile class and object decorators to ES5
See our website [@babel/plugin-proposal-decorators](https://babeljs.io/docs/babel-plugin-proposal-decorators) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-proposal-decorators
```
or using yarn:
```sh
yarn add @babel/plugin-proposal-decorators --dev
```

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _pluginSyntaxDecorators = require("@babel/plugin-syntax-decorators");
var _helperCreateClassFeaturesPlugin = require("@babel/helper-create-class-features-plugin");
var _transformerLegacy = require("./transformer-legacy");
var _transformer = require("./transformer-2023-05");
var _default = (0, _helperPluginUtils.declare)((api, options) => {
api.assertVersion(7);
{
var {
legacy
} = options;
}
const {
version
} = options;
if (legacy || version === "legacy") {
return {
name: "proposal-decorators",
inherits: _pluginSyntaxDecorators.default,
visitor: _transformerLegacy.default
};
} else if (version === "2021-12" || version === "2022-03" || version === "2023-01" || version === "2023-05") {
return (0, _transformer.default)(api, options, version);
} else {
api.assertVersion("^7.0.2");
return (0, _helperCreateClassFeaturesPlugin.createClassFeaturePlugin)({
name: "proposal-decorators",
api,
feature: _helperCreateClassFeaturesPlugin.FEATURES.decorators,
inherits: _pluginSyntaxDecorators.default
});
}
});
exports.default = _default;
//# sourceMappingURL=index.js.map

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{"version":3,"names":["_helperPluginUtils","require","_pluginSyntaxDecorators","_helperCreateClassFeaturesPlugin","_transformerLegacy","_transformer","_default","declare","api","options","assertVersion","legacy","version","name","inherits","syntaxDecorators","visitor","legacyVisitor","transformer2023_05","createClassFeaturePlugin","feature","FEATURES","decorators","exports","default"],"sources":["../src/index.ts"],"sourcesContent":["/* eslint-disable @babel/development/plugin-name */\n\nimport { declare } from \"@babel/helper-plugin-utils\";\nimport syntaxDecorators from \"@babel/plugin-syntax-decorators\";\nimport {\n createClassFeaturePlugin,\n FEATURES,\n} from \"@babel/helper-create-class-features-plugin\";\nimport legacyVisitor from \"./transformer-legacy\";\nimport transformer2023_05 from \"./transformer-2023-05\";\nimport type { Options as SyntaxOptions } from \"@babel/plugin-syntax-decorators\";\n\ninterface Options extends SyntaxOptions {\n /** @deprecated use `constantSuper` assumption instead. Only supported in 2021-12 version. */\n loose?: boolean;\n}\n\nexport type { Options };\n\nexport default declare((api, options: Options) => {\n api.assertVersion(7);\n\n // Options are validated in @babel/plugin-syntax-decorators\n if (!process.env.BABEL_8_BREAKING) {\n // eslint-disable-next-line no-var\n var { legacy } = options;\n }\n const { version } = options;\n\n if (\n process.env.BABEL_8_BREAKING\n ? version === \"legacy\"\n : legacy || version === \"legacy\"\n ) {\n return {\n name: \"proposal-decorators\",\n inherits: syntaxDecorators,\n visitor: legacyVisitor,\n };\n } else if (\n version === \"2021-12\" ||\n version === \"2022-03\" ||\n version === \"2023-01\" ||\n version === \"2023-05\"\n ) {\n return transformer2023_05(api, options, version);\n } else if (!process.env.BABEL_8_BREAKING) {\n api.assertVersion(\"^7.0.2\");\n return createClassFeaturePlugin({\n name: \"proposal-decorators\",\n\n api,\n feature: FEATURES.decorators,\n inherits: syntaxDecorators,\n // loose: options.loose, Not supported\n });\n } else {\n throw new Error(\n \"The '.version' option must be one of 'legacy', '2021-12', '2022-03', or '2023-01'.\",\n );\n }\n});\n"],"mappings":";;;;;;AAEA,IAAAA,kBAAA,GAAAC,OAAA;AACA,IAAAC,uBAAA,GAAAD,OAAA;AACA,IAAAE,gCAAA,GAAAF,OAAA;AAIA,IAAAG,kBAAA,GAAAH,OAAA;AACA,IAAAI,YAAA,GAAAJ,OAAA;AAAuD,IAAAK,QAAA,GAUxC,IAAAC,0BAAO,EAAC,CAACC,GAAG,EAAEC,OAAgB,KAAK;EAChDD,GAAG,CAACE,aAAa,CAAC,CAAC,CAAC;EAGe;IAEjC,IAAI;MAAEC;IAAO,CAAC,GAAGF,OAAO;EAC1B;EACA,MAAM;IAAEG;EAAQ,CAAC,GAAGH,OAAO;EAE3B,IAGME,MAAM,IAAIC,OAAO,KAAK,QAAQ,EAClC;IACA,OAAO;MACLC,IAAI,EAAE,qBAAqB;MAC3BC,QAAQ,EAAEC,+BAAgB;MAC1BC,OAAO,EAAEC;IACX,CAAC;EACH,CAAC,MAAM,IACLL,OAAO,KAAK,SAAS,IACrBA,OAAO,KAAK,SAAS,IACrBA,OAAO,KAAK,SAAS,IACrBA,OAAO,KAAK,SAAS,EACrB;IACA,OAAO,IAAAM,oBAAkB,EAACV,GAAG,EAAEC,OAAO,EAAEG,OAAO,CAAC;EAClD,CAAC,MAAyC;IACxCJ,GAAG,CAACE,aAAa,CAAC,QAAQ,CAAC;IAC3B,OAAO,IAAAS,yDAAwB,EAAC;MAC9BN,IAAI,EAAE,qBAAqB;MAE3BL,GAAG;MACHY,OAAO,EAAEC,yCAAQ,CAACC,UAAU;MAC5BR,QAAQ,EAAEC;IAEZ,CAAC,CAAC;EACJ;AAKF,CAAC,CAAC;AAAAQ,OAAA,CAAAC,OAAA,GAAAlB,QAAA"}

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var _core = require("@babel/core");
var _pluginSyntaxDecorators = require("@babel/plugin-syntax-decorators");
var _helperReplaceSupers = require("@babel/helper-replace-supers");
var _helperSplitExportDeclaration = require("@babel/helper-split-export-declaration");
function incrementId(id, idx = id.length - 1) {
if (idx === -1) {
id.unshift(65);
return;
}
const current = id[idx];
if (current === 90) {
id[idx] = 97;
} else if (current === 122) {
id[idx] = 65;
incrementId(id, idx - 1);
} else {
id[idx] = current + 1;
}
}
function createPrivateUidGeneratorForClass(classPath) {
const currentPrivateId = [];
const privateNames = new Set();
classPath.traverse({
PrivateName(path) {
privateNames.add(path.node.id.name);
}
});
return () => {
let reifiedId;
do {
incrementId(currentPrivateId);
reifiedId = String.fromCharCode(...currentPrivateId);
} while (privateNames.has(reifiedId));
return _core.types.privateName(_core.types.identifier(reifiedId));
};
}
function createLazyPrivateUidGeneratorForClass(classPath) {
let generator;
return () => {
if (!generator) {
generator = createPrivateUidGeneratorForClass(classPath);
}
return generator();
};
}
function replaceClassWithVar(path) {
if (path.type === "ClassDeclaration") {
const varId = path.scope.generateUidIdentifierBasedOnNode(path.node.id);
const classId = _core.types.identifier(path.node.id.name);
path.scope.rename(classId.name, varId.name);
path.insertBefore(_core.types.variableDeclaration("let", [_core.types.variableDeclarator(varId)]));
path.get("id").replaceWith(classId);
return [_core.types.cloneNode(varId), path];
} else {
let className;
let varId;
if (path.node.id) {
className = path.node.id.name;
varId = path.scope.parent.generateDeclaredUidIdentifier(className);
path.scope.rename(className, varId.name);
} else if (path.parentPath.node.type === "VariableDeclarator" && path.parentPath.node.id.type === "Identifier") {
className = path.parentPath.node.id.name;
varId = path.scope.parent.generateDeclaredUidIdentifier(className);
} else {
varId = path.scope.parent.generateDeclaredUidIdentifier("decorated_class");
}
const newClassExpr = _core.types.classExpression(className && _core.types.identifier(className), path.node.superClass, path.node.body);
const [newPath] = path.replaceWith(_core.types.sequenceExpression([newClassExpr, varId]));
return [_core.types.cloneNode(varId), newPath.get("expressions.0")];
}
}
function generateClassProperty(key, value, isStatic) {
if (key.type === "PrivateName") {
return _core.types.classPrivateProperty(key, value, undefined, isStatic);
} else {
return _core.types.classProperty(key, value, undefined, undefined, isStatic);
}
}
function addProxyAccessorsFor(className, element, originalKey, targetKey, version, isComputed = false) {
const {
static: isStatic
} = element.node;
const thisArg = version === "2023-05" && isStatic ? className : _core.types.thisExpression();
const getterBody = _core.types.blockStatement([_core.types.returnStatement(_core.types.memberExpression(_core.types.cloneNode(thisArg), _core.types.cloneNode(targetKey)))]);
const setterBody = _core.types.blockStatement([_core.types.expressionStatement(_core.types.assignmentExpression("=", _core.types.memberExpression(_core.types.cloneNode(thisArg), _core.types.cloneNode(targetKey)), _core.types.identifier("v")))]);
let getter, setter;
if (originalKey.type === "PrivateName") {
getter = _core.types.classPrivateMethod("get", _core.types.cloneNode(originalKey), [], getterBody, isStatic);
setter = _core.types.classPrivateMethod("set", _core.types.cloneNode(originalKey), [_core.types.identifier("v")], setterBody, isStatic);
} else {
getter = _core.types.classMethod("get", _core.types.cloneNode(originalKey), [], getterBody, isComputed, isStatic);
setter = _core.types.classMethod("set", _core.types.cloneNode(originalKey), [_core.types.identifier("v")], setterBody, isComputed, isStatic);
}
element.insertAfter(setter);
element.insertAfter(getter);
}
function extractProxyAccessorsFor(targetKey, version) {
if (version !== "2023-05" && version !== "2023-01") {
return [_core.template.expression.ast`
function () {
return this.${_core.types.cloneNode(targetKey)};
}
`, _core.template.expression.ast`
function (value) {
this.${_core.types.cloneNode(targetKey)} = value;
}
`];
}
return [_core.template.expression.ast`
o => o.${_core.types.cloneNode(targetKey)}
`, _core.template.expression.ast`
(o, v) => o.${_core.types.cloneNode(targetKey)} = v
`];
}
const FIELD = 0;
const ACCESSOR = 1;
const METHOD = 2;
const GETTER = 3;
const SETTER = 4;
const STATIC_OLD_VERSION = 5;
const STATIC = 8;
const DECORATORS_HAVE_THIS = 16;
function getElementKind(element) {
switch (element.node.type) {
case "ClassProperty":
case "ClassPrivateProperty":
return FIELD;
case "ClassAccessorProperty":
return ACCESSOR;
case "ClassMethod":
case "ClassPrivateMethod":
if (element.node.kind === "get") {
return GETTER;
} else if (element.node.kind === "set") {
return SETTER;
} else {
return METHOD;
}
}
}
function isDecoratorInfo(info) {
return "decorators" in info;
}
function filteredOrderedDecoratorInfo(info) {
const filtered = info.filter(isDecoratorInfo);
return [...filtered.filter(el => el.isStatic && el.kind >= ACCESSOR && el.kind <= SETTER), ...filtered.filter(el => !el.isStatic && el.kind >= ACCESSOR && el.kind <= SETTER), ...filtered.filter(el => el.isStatic && el.kind === FIELD), ...filtered.filter(el => !el.isStatic && el.kind === FIELD)];
}
function generateDecorationList(decorators, decoratorsThis, version) {
const decsCount = decorators.length;
const hasOneThis = decoratorsThis.some(Boolean);
const decs = [];
for (let i = 0; i < decsCount; i++) {
if (version === "2023-05" && hasOneThis) {
decs.push(decoratorsThis[i] || _core.types.unaryExpression("void", _core.types.numericLiteral(0)));
}
decs.push(decorators[i]);
}
return {
hasThis: hasOneThis,
decs
};
}
function generateDecorationExprs(info, version) {
return _core.types.arrayExpression(filteredOrderedDecoratorInfo(info).map(el => {
const {
decs,
hasThis
} = generateDecorationList(el.decorators, el.decoratorsThis, version);
let flag = el.kind;
if (el.isStatic) {
flag += version === "2023-05" ? STATIC : STATIC_OLD_VERSION;
}
if (hasThis) flag += DECORATORS_HAVE_THIS;
return _core.types.arrayExpression([decs.length === 1 ? decs[0] : _core.types.arrayExpression(decs), _core.types.numericLiteral(flag), el.name, ...(el.privateMethods || [])]);
}));
}
function extractElementLocalAssignments(decorationInfo) {
const localIds = [];
for (const el of filteredOrderedDecoratorInfo(decorationInfo)) {
const {
locals
} = el;
if (Array.isArray(locals)) {
localIds.push(...locals);
} else if (locals !== undefined) {
localIds.push(locals);
}
}
return localIds;
}
function addCallAccessorsFor(element, key, getId, setId) {
element.insertAfter(_core.types.classPrivateMethod("get", _core.types.cloneNode(key), [], _core.types.blockStatement([_core.types.returnStatement(_core.types.callExpression(_core.types.cloneNode(getId), [_core.types.thisExpression()]))])));
element.insertAfter(_core.types.classPrivateMethod("set", _core.types.cloneNode(key), [_core.types.identifier("v")], _core.types.blockStatement([_core.types.expressionStatement(_core.types.callExpression(_core.types.cloneNode(setId), [_core.types.thisExpression(), _core.types.identifier("v")]))])));
}
function isNotTsParameter(node) {
return node.type !== "TSParameterProperty";
}
function movePrivateAccessor(element, key, methodLocalVar, isStatic) {
let params;
let block;
if (element.node.kind === "set") {
params = [_core.types.identifier("v")];
block = [_core.types.expressionStatement(_core.types.callExpression(methodLocalVar, [_core.types.thisExpression(), _core.types.identifier("v")]))];
} else {
params = [];
block = [_core.types.returnStatement(_core.types.callExpression(methodLocalVar, [_core.types.thisExpression()]))];
}
element.replaceWith(_core.types.classPrivateMethod(element.node.kind, _core.types.cloneNode(key), params, _core.types.blockStatement(block), isStatic));
}
function isClassDecoratableElementPath(path) {
const {
type
} = path;
return type !== "TSDeclareMethod" && type !== "TSIndexSignature" && type !== "StaticBlock";
}
function staticBlockToIIFE(block) {
return _core.types.callExpression(_core.types.arrowFunctionExpression([], _core.types.blockStatement(block.body)), []);
}
function maybeSequenceExpression(exprs) {
if (exprs.length === 0) return _core.types.unaryExpression("void", _core.types.numericLiteral(0));
if (exprs.length === 1) return exprs[0];
return _core.types.sequenceExpression(exprs);
}
function transformClass(path, state, constantSuper, version) {
const body = path.get("body.body");
const classDecorators = path.node.decorators;
let hasElementDecorators = false;
const generateClassPrivateUid = createLazyPrivateUidGeneratorForClass(path);
for (const element of body) {
if (!isClassDecoratableElementPath(element)) {
continue;
}
if (element.node.decorators && element.node.decorators.length > 0) {
hasElementDecorators = true;
} else if (element.node.type === "ClassAccessorProperty") {
const {
key,
value,
static: isStatic,
computed
} = element.node;
const newId = generateClassPrivateUid();
const valueNode = value ? _core.types.cloneNode(value) : undefined;
const newField = generateClassProperty(newId, valueNode, isStatic);
const [newPath] = element.replaceWith(newField);
addProxyAccessorsFor(path.node.id, newPath, key, newId, version, computed);
}
}
if (!classDecorators && !hasElementDecorators) return;
const elementDecoratorInfo = [];
let firstFieldPath;
let constructorPath;
let requiresProtoInit = false;
let requiresStaticInit = false;
const decoratedPrivateMethods = new Set();
let protoInitLocal, staticInitLocal, classInitLocal, classIdLocal;
const assignments = [];
const scopeParent = path.scope.parent;
const memoiseExpression = (expression, hint) => {
const localEvaluatedId = scopeParent.generateDeclaredUidIdentifier(hint);
assignments.push(_core.types.assignmentExpression("=", localEvaluatedId, expression));
return _core.types.cloneNode(localEvaluatedId);
};
const decoratorsThis = new Map();
const maybeExtractDecorator = decorator => {
const {
expression
} = decorator;
if (version === "2023-05" && _core.types.isMemberExpression(expression)) {
let object;
if (_core.types.isSuper(expression.object) || _core.types.isThisExpression(expression.object)) {
object = memoiseExpression(_core.types.thisExpression(), "obj");
} else if (!scopeParent.isStatic(expression.object)) {
object = memoiseExpression(expression.object, "obj");
expression.object = object;
} else {
object = expression.object;
}
decoratorsThis.set(decorator, _core.types.cloneNode(object));
}
if (!scopeParent.isStatic(expression)) {
decorator.expression = memoiseExpression(expression, "dec");
}
};
if (classDecorators) {
classInitLocal = scopeParent.generateDeclaredUidIdentifier("initClass");
const [classId, classPath] = replaceClassWithVar(path);
path = classPath;
classIdLocal = classId;
path.node.decorators = null;
for (const classDecorator of classDecorators) {
maybeExtractDecorator(classDecorator);
}
} else {
if (!path.node.id) {
path.node.id = path.scope.generateUidIdentifier("Class");
}
classIdLocal = _core.types.cloneNode(path.node.id);
}
let lastInstancePrivateName;
let needsInstancePrivateBrandCheck = false;
if (hasElementDecorators) {
for (const element of body) {
if (!isClassDecoratableElementPath(element)) {
continue;
}
const {
node
} = element;
const decorators = element.get("decorators");
const hasDecorators = Array.isArray(decorators) && decorators.length > 0;
if (hasDecorators) {
for (const decoratorPath of decorators) {
maybeExtractDecorator(decoratorPath.node);
}
}
const isComputed = "computed" in element.node && element.node.computed === true;
if (isComputed) {
if (!scopeParent.isStatic(node.key)) {
node.key = memoiseExpression(node.key, "computedKey");
}
}
const kind = getElementKind(element);
const {
key
} = node;
const isPrivate = key.type === "PrivateName";
const isStatic = !!element.node.static;
let name = "computedKey";
if (isPrivate) {
name = key.id.name;
} else if (!isComputed && key.type === "Identifier") {
name = key.name;
}
if (isPrivate && !isStatic) {
if (hasDecorators) {
needsInstancePrivateBrandCheck = true;
}
if (_core.types.isClassPrivateProperty(node) || !lastInstancePrivateName) {
lastInstancePrivateName = key;
}
}
if (element.isClassMethod({
kind: "constructor"
})) {
constructorPath = element;
}
if (hasDecorators) {
let locals;
let privateMethods;
if (kind === ACCESSOR) {
const {
value
} = element.node;
const params = [_core.types.thisExpression()];
if (value) {
params.push(_core.types.cloneNode(value));
}
const newId = generateClassPrivateUid();
const newFieldInitId = element.scope.parent.generateDeclaredUidIdentifier(`init_${name}`);
const newValue = _core.types.callExpression(_core.types.cloneNode(newFieldInitId), params);
const newField = generateClassProperty(newId, newValue, isStatic);
const [newPath] = element.replaceWith(newField);
if (isPrivate) {
privateMethods = extractProxyAccessorsFor(newId, version);
const getId = newPath.scope.parent.generateDeclaredUidIdentifier(`get_${name}`);
const setId = newPath.scope.parent.generateDeclaredUidIdentifier(`set_${name}`);
addCallAccessorsFor(newPath, key, getId, setId);
locals = [newFieldInitId, getId, setId];
} else {
addProxyAccessorsFor(path.node.id, newPath, key, newId, version, isComputed);
locals = newFieldInitId;
}
} else if (kind === FIELD) {
const initId = element.scope.parent.generateDeclaredUidIdentifier(`init_${name}`);
const valuePath = element.get("value");
valuePath.replaceWith(_core.types.callExpression(_core.types.cloneNode(initId), [_core.types.thisExpression(), valuePath.node].filter(v => v)));
locals = initId;
if (isPrivate) {
privateMethods = extractProxyAccessorsFor(key, version);
}
} else if (isPrivate) {
locals = element.scope.parent.generateDeclaredUidIdentifier(`call_${name}`);
const replaceSupers = new _helperReplaceSupers.default({
constantSuper,
methodPath: element,
objectRef: classIdLocal,
superRef: path.node.superClass,
file: state.file,
refToPreserve: classIdLocal
});
replaceSupers.replace();
const {
params,
body,
async: isAsync
} = element.node;
privateMethods = [_core.types.functionExpression(undefined, params.filter(isNotTsParameter), body, isAsync)];
if (kind === GETTER || kind === SETTER) {
movePrivateAccessor(element, _core.types.cloneNode(key), _core.types.cloneNode(locals), isStatic);
} else {
const node = element.node;
path.node.body.body.unshift(_core.types.classPrivateProperty(key, _core.types.cloneNode(locals), [], node.static));
decoratedPrivateMethods.add(key.id.name);
element.remove();
}
}
let nameExpr;
if (isComputed) {
nameExpr = _core.types.cloneNode(key);
} else if (key.type === "PrivateName") {
nameExpr = _core.types.stringLiteral(key.id.name);
} else if (key.type === "Identifier") {
nameExpr = _core.types.stringLiteral(key.name);
} else {
nameExpr = _core.types.cloneNode(key);
}
elementDecoratorInfo.push({
kind,
decorators: decorators.map(d => d.node.expression),
decoratorsThis: decorators.map(d => decoratorsThis.get(d.node)),
name: nameExpr,
isStatic,
privateMethods,
locals
});
if (kind !== FIELD) {
if (isStatic) {
requiresStaticInit = true;
} else {
requiresProtoInit = true;
}
}
if (element.node) {
element.node.decorators = null;
}
if (!firstFieldPath && !isStatic && (kind === FIELD || kind === ACCESSOR)) {
firstFieldPath = element;
}
}
}
}
const elementDecorations = generateDecorationExprs(elementDecoratorInfo, version);
let classDecorationsFlag = 0;
let classDecorations = [];
if (classDecorators) {
const {
hasThis,
decs
} = generateDecorationList(classDecorators.map(el => el.expression), classDecorators.map(dec => decoratorsThis.get(dec)), version);
classDecorationsFlag = hasThis ? 1 : 0;
classDecorations = decs;
}
const elementLocals = extractElementLocalAssignments(elementDecoratorInfo);
if (requiresProtoInit) {
protoInitLocal = scopeParent.generateDeclaredUidIdentifier("initProto");
elementLocals.push(protoInitLocal);
const protoInitCall = _core.types.callExpression(_core.types.cloneNode(protoInitLocal), [_core.types.thisExpression()]);
if (firstFieldPath) {
const value = firstFieldPath.get("value");
const body = [protoInitCall];
if (value.node) {
body.push(value.node);
}
value.replaceWith(_core.types.sequenceExpression(body));
} else if (constructorPath) {
if (path.node.superClass) {
path.traverse({
CallExpression: {
exit(path) {
if (!path.get("callee").isSuper()) return;
path.replaceWith(_core.types.callExpression(_core.types.cloneNode(protoInitLocal), [path.node]));
path.skip();
}
}
});
} else {
constructorPath.node.body.body.unshift(_core.types.expressionStatement(protoInitCall));
}
} else {
const body = [_core.types.expressionStatement(protoInitCall)];
if (path.node.superClass) {
body.unshift(_core.types.expressionStatement(_core.types.callExpression(_core.types.super(), [_core.types.spreadElement(_core.types.identifier("args"))])));
}
path.node.body.body.unshift(_core.types.classMethod("constructor", _core.types.identifier("constructor"), [_core.types.restElement(_core.types.identifier("args"))], _core.types.blockStatement(body)));
}
}
if (requiresStaticInit) {
staticInitLocal = scopeParent.generateDeclaredUidIdentifier("initStatic");
elementLocals.push(staticInitLocal);
}
if (decoratedPrivateMethods.size > 0) {
path.traverse({
PrivateName(path) {
if (!decoratedPrivateMethods.has(path.node.id.name)) return;
const parentPath = path.parentPath;
const parentParentPath = parentPath.parentPath;
if (parentParentPath.node.type === "AssignmentExpression" && parentParentPath.node.left === parentPath.node || parentParentPath.node.type === "UpdateExpression" || parentParentPath.node.type === "RestElement" || parentParentPath.node.type === "ArrayPattern" || parentParentPath.node.type === "ObjectProperty" && parentParentPath.node.value === parentPath.node && parentParentPath.parentPath.type === "ObjectPattern" || parentParentPath.node.type === "ForOfStatement" && parentParentPath.node.left === parentPath.node) {
throw path.buildCodeFrameError(`Decorated private methods are not updatable, but "#${path.node.id.name}" is updated via this expression.`);
}
}
});
}
const classLocals = [];
let classInitInjected = false;
const classInitCall = classInitLocal && _core.types.callExpression(_core.types.cloneNode(classInitLocal), []);
const originalClass = path.node;
if (classDecorators) {
classLocals.push(classIdLocal, classInitLocal);
const statics = [];
let staticBlocks = [];
path.get("body.body").forEach(element => {
if (element.isStaticBlock()) {
staticBlocks.push(element.node);
element.remove();
return;
}
const isProperty = element.isClassProperty() || element.isClassPrivateProperty();
if ((isProperty || element.isClassPrivateMethod()) && element.node.static) {
if (isProperty && staticBlocks.length > 0) {
const allValues = staticBlocks.map(staticBlockToIIFE);
if (element.node.value) allValues.push(element.node.value);
element.node.value = maybeSequenceExpression(allValues);
staticBlocks = [];
}
element.node.static = false;
statics.push(element.node);
element.remove();
}
});
if (statics.length > 0 || staticBlocks.length > 0) {
const staticsClass = _core.template.expression.ast`
class extends ${state.addHelper("identity")} {}
`;
staticsClass.body.body = [_core.types.staticBlock([_core.types.toStatement(originalClass, true) || _core.types.expressionStatement(originalClass)]), ...statics];
const constructorBody = [];
const newExpr = _core.types.newExpression(staticsClass, []);
if (staticBlocks.length > 0) {
constructorBody.push(...staticBlocks.map(staticBlockToIIFE));
}
if (classInitCall) {
classInitInjected = true;
constructorBody.push(classInitCall);
}
if (constructorBody.length > 0) {
constructorBody.unshift(_core.types.callExpression(_core.types.super(), [_core.types.cloneNode(classIdLocal)]));
staticsClass.body.body.push(_core.types.classMethod("constructor", _core.types.identifier("constructor"), [], _core.types.blockStatement([_core.types.expressionStatement(_core.types.sequenceExpression(constructorBody))])));
} else {
newExpr.arguments.push(_core.types.cloneNode(classIdLocal));
}
path.replaceWith(newExpr);
}
}
if (!classInitInjected && classInitCall) {
path.node.body.body.push(_core.types.staticBlock([_core.types.expressionStatement(classInitCall)]));
}
originalClass.body.body.unshift(_core.types.staticBlock([_core.types.expressionStatement(createLocalsAssignment(elementLocals, classLocals, elementDecorations, _core.types.arrayExpression(classDecorations), _core.types.numericLiteral(classDecorationsFlag), needsInstancePrivateBrandCheck ? lastInstancePrivateName : null, state, version)), requiresStaticInit && _core.types.expressionStatement(_core.types.callExpression(_core.types.cloneNode(staticInitLocal), [_core.types.thisExpression()]))].filter(Boolean)));
path.insertBefore(assignments.map(expr => _core.types.expressionStatement(expr)));
path.scope.crawl();
return path;
}
function createLocalsAssignment(elementLocals, classLocals, elementDecorations, classDecorations, classDecorationsFlag, maybePrivateBranName, state, version) {
let lhs, rhs;
const args = [_core.types.thisExpression(), elementDecorations, classDecorations];
{
if (version === "2021-12" || version === "2022-03" && !state.availableHelper("applyDecs2203R")) {
const lhs = _core.types.arrayPattern([...elementLocals, ...classLocals]);
const rhs = _core.types.callExpression(state.addHelper(version === "2021-12" ? "applyDecs" : "applyDecs2203"), args);
return _core.types.assignmentExpression("=", lhs, rhs);
}
}
if (version === "2023-05") {
if (maybePrivateBranName || classDecorationsFlag.value !== 0) {
args.push(classDecorationsFlag);
}
if (maybePrivateBranName) {
args.push(_core.template.expression.ast`
_ => ${_core.types.cloneNode(maybePrivateBranName)} in _
`);
}
rhs = _core.types.callExpression(state.addHelper("applyDecs2305"), args);
} else if (version === "2023-01") {
if (maybePrivateBranName) {
args.push(_core.template.expression.ast`
_ => ${_core.types.cloneNode(maybePrivateBranName)} in _
`);
}
rhs = _core.types.callExpression(state.addHelper("applyDecs2301"), args);
} else {
rhs = _core.types.callExpression(state.addHelper("applyDecs2203R"), args);
}
if (elementLocals.length > 0) {
if (classLocals.length > 0) {
lhs = _core.types.objectPattern([_core.types.objectProperty(_core.types.identifier("e"), _core.types.arrayPattern(elementLocals)), _core.types.objectProperty(_core.types.identifier("c"), _core.types.arrayPattern(classLocals))]);
} else {
lhs = _core.types.arrayPattern(elementLocals);
rhs = _core.types.memberExpression(rhs, _core.types.identifier("e"), false, false);
}
} else {
lhs = _core.types.arrayPattern(classLocals);
rhs = _core.types.memberExpression(rhs, _core.types.identifier("c"), false, false);
}
return _core.types.assignmentExpression("=", lhs, rhs);
}
function _default({
assertVersion,
assumption
}, {
loose
}, version) {
var _assumption;
{
if (version === "2023-05" || version === "2023-01") {
assertVersion("^7.21.0");
} else if (version === "2021-12") {
assertVersion("^7.16.0");
} else {
assertVersion("^7.19.0");
}
}
const VISITED = new WeakSet();
const constantSuper = (_assumption = assumption("constantSuper")) != null ? _assumption : loose;
return {
name: "proposal-decorators",
inherits: _pluginSyntaxDecorators.default,
visitor: {
"ExportNamedDeclaration|ExportDefaultDeclaration"(path) {
var _declaration$decorato;
const {
declaration
} = path.node;
if ((declaration == null ? void 0 : declaration.type) === "ClassDeclaration" && ((_declaration$decorato = declaration.decorators) == null ? void 0 : _declaration$decorato.length) > 0) {
(0, _helperSplitExportDeclaration.default)(path);
}
},
Class(path, state) {
if (VISITED.has(path)) return;
const newPath = transformClass(path, state, constantSuper, version);
if (newPath) VISITED.add(newPath);
}
}
};
}
//# sourceMappingURL=transformer-2023-05.js.map

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _core = require("@babel/core");
const buildClassDecorator = _core.template.statement(`
DECORATOR(CLASS_REF = INNER) || CLASS_REF;
`);
const buildClassPrototype = (0, _core.template)(`
CLASS_REF.prototype;
`);
const buildGetDescriptor = (0, _core.template)(`
Object.getOwnPropertyDescriptor(TARGET, PROPERTY);
`);
const buildGetObjectInitializer = (0, _core.template)(`
(TEMP = Object.getOwnPropertyDescriptor(TARGET, PROPERTY), (TEMP = TEMP ? TEMP.value : undefined), {
enumerable: true,
configurable: true,
writable: true,
initializer: function(){
return TEMP;
}
})
`);
const WARNING_CALLS = new WeakSet();
function applyEnsureOrdering(path) {
const decorators = (path.isClass() ? [path, ...path.get("body.body")] : path.get("properties")).reduce((acc, prop) => acc.concat(prop.node.decorators || []), []);
const identDecorators = decorators.filter(decorator => !_core.types.isIdentifier(decorator.expression));
if (identDecorators.length === 0) return;
return _core.types.sequenceExpression(identDecorators.map(decorator => {
const expression = decorator.expression;
const id = decorator.expression = path.scope.generateDeclaredUidIdentifier("dec");
return _core.types.assignmentExpression("=", id, expression);
}).concat([path.node]));
}
function applyClassDecorators(classPath) {
if (!hasClassDecorators(classPath.node)) return;
const decorators = classPath.node.decorators || [];
classPath.node.decorators = null;
const name = classPath.scope.generateDeclaredUidIdentifier("class");
return decorators.map(dec => dec.expression).reverse().reduce(function (acc, decorator) {
return buildClassDecorator({
CLASS_REF: _core.types.cloneNode(name),
DECORATOR: _core.types.cloneNode(decorator),
INNER: acc
}).expression;
}, classPath.node);
}
function hasClassDecorators(classNode) {
var _classNode$decorators;
return !!((_classNode$decorators = classNode.decorators) != null && _classNode$decorators.length);
}
function applyMethodDecorators(path, state) {
if (!hasMethodDecorators(path.node.body.body)) return;
return applyTargetDecorators(path, state, path.node.body.body);
}
function hasMethodDecorators(body) {
return body.some(node => {
var _node$decorators;
return (_node$decorators = node.decorators) == null ? void 0 : _node$decorators.length;
});
}
function applyObjectDecorators(path, state) {
if (!hasMethodDecorators(path.node.properties)) return;
return applyTargetDecorators(path, state, path.node.properties.filter(prop => prop.type !== "SpreadElement"));
}
function applyTargetDecorators(path, state, decoratedProps) {
const name = path.scope.generateDeclaredUidIdentifier(path.isClass() ? "class" : "obj");
const exprs = decoratedProps.reduce(function (acc, node) {
let decorators = [];
if (node.decorators != null) {
decorators = node.decorators;
node.decorators = null;
}
if (decorators.length === 0) return acc;
if (node.computed) {
throw path.buildCodeFrameError("Computed method/property decorators are not yet supported.");
}
const property = _core.types.isLiteral(node.key) ? node.key : _core.types.stringLiteral(node.key.name);
const target = path.isClass() && !node.static ? buildClassPrototype({
CLASS_REF: name
}).expression : name;
if (_core.types.isClassProperty(node, {
static: false
})) {
const descriptor = path.scope.generateDeclaredUidIdentifier("descriptor");
const initializer = node.value ? _core.types.functionExpression(null, [], _core.types.blockStatement([_core.types.returnStatement(node.value)])) : _core.types.nullLiteral();
node.value = _core.types.callExpression(state.addHelper("initializerWarningHelper"), [descriptor, _core.types.thisExpression()]);
WARNING_CALLS.add(node.value);
acc.push(_core.types.assignmentExpression("=", _core.types.cloneNode(descriptor), _core.types.callExpression(state.addHelper("applyDecoratedDescriptor"), [_core.types.cloneNode(target), _core.types.cloneNode(property), _core.types.arrayExpression(decorators.map(dec => _core.types.cloneNode(dec.expression))), _core.types.objectExpression([_core.types.objectProperty(_core.types.identifier("configurable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("enumerable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("writable"), _core.types.booleanLiteral(true)), _core.types.objectProperty(_core.types.identifier("initializer"), initializer)])])));
} else {
acc.push(_core.types.callExpression(state.addHelper("applyDecoratedDescriptor"), [_core.types.cloneNode(target), _core.types.cloneNode(property), _core.types.arrayExpression(decorators.map(dec => _core.types.cloneNode(dec.expression))), _core.types.isObjectProperty(node) || _core.types.isClassProperty(node, {
static: true
}) ? buildGetObjectInitializer({
TEMP: path.scope.generateDeclaredUidIdentifier("init"),
TARGET: _core.types.cloneNode(target),
PROPERTY: _core.types.cloneNode(property)
}).expression : buildGetDescriptor({
TARGET: _core.types.cloneNode(target),
PROPERTY: _core.types.cloneNode(property)
}).expression, _core.types.cloneNode(target)]));
}
return acc;
}, []);
return _core.types.sequenceExpression([_core.types.assignmentExpression("=", _core.types.cloneNode(name), path.node), _core.types.sequenceExpression(exprs), _core.types.cloneNode(name)]);
}
function decoratedClassToExpression({
node,
scope
}) {
if (!hasClassDecorators(node) && !hasMethodDecorators(node.body.body)) {
return;
}
const ref = node.id ? _core.types.cloneNode(node.id) : scope.generateUidIdentifier("class");
return _core.types.variableDeclaration("let", [_core.types.variableDeclarator(ref, _core.types.toExpression(node))]);
}
const visitor = {
ExportDefaultDeclaration(path) {
const decl = path.get("declaration");
if (!decl.isClassDeclaration()) return;
const replacement = decoratedClassToExpression(decl);
if (replacement) {
const [varDeclPath] = path.replaceWithMultiple([replacement, _core.types.exportNamedDeclaration(null, [_core.types.exportSpecifier(_core.types.cloneNode(replacement.declarations[0].id), _core.types.identifier("default"))])]);
if (!decl.node.id) {
path.scope.registerDeclaration(varDeclPath);
}
}
},
ClassDeclaration(path) {
const replacement = decoratedClassToExpression(path);
if (replacement) {
const [newPath] = path.replaceWith(replacement);
const decl = newPath.get("declarations.0");
const id = decl.node.id;
const binding = path.scope.getOwnBinding(id.name);
binding.identifier = id;
binding.path = decl;
}
},
ClassExpression(path, state) {
const decoratedClass = applyEnsureOrdering(path) || applyClassDecorators(path) || applyMethodDecorators(path, state);
if (decoratedClass) path.replaceWith(decoratedClass);
},
ObjectExpression(path, state) {
const decoratedObject = applyEnsureOrdering(path) || applyObjectDecorators(path, state);
if (decoratedObject) path.replaceWith(decoratedObject);
},
AssignmentExpression(path, state) {
if (!WARNING_CALLS.has(path.node.right)) return;
path.replaceWith(_core.types.callExpression(state.addHelper("initializerDefineProperty"), [_core.types.cloneNode(path.get("left.object").node), _core.types.stringLiteral(path.get("left.property").node.name || path.get("left.property").node.value), _core.types.cloneNode(path.get("right.arguments")[0].node), _core.types.cloneNode(path.get("right.arguments")[1].node)]));
},
CallExpression(path, state) {
if (path.node.arguments.length !== 3) return;
if (!WARNING_CALLS.has(path.node.arguments[2])) return;
if (path.node.callee.name !== state.addHelper("defineProperty").name) {
return;
}
path.replaceWith(_core.types.callExpression(state.addHelper("initializerDefineProperty"), [_core.types.cloneNode(path.get("arguments")[0].node), _core.types.cloneNode(path.get("arguments")[1].node), _core.types.cloneNode(path.get("arguments.2.arguments")[0].node), _core.types.cloneNode(path.get("arguments.2.arguments")[1].node)]));
}
};
var _default = visitor;
exports.default = _default;
//# sourceMappingURL=transformer-legacy.js.map

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{
"_from": "@babel/plugin-proposal-decorators@^7.12.13",
"_id": "@babel/plugin-proposal-decorators@7.22.10",
"_inBundle": false,
"_integrity": "sha512-KxN6TqZzcFi4uD3UifqXElBTBNLAEH1l3vzMQj6JwJZbL2sZlThxSViOKCYY+4Ah4V4JhQ95IVB7s/Y6SJSlMQ==",
"_location": "/@babel/plugin-proposal-decorators",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "@babel/plugin-proposal-decorators@^7.12.13",
"name": "@babel/plugin-proposal-decorators",
"escapedName": "@babel%2fplugin-proposal-decorators",
"scope": "@babel",
"rawSpec": "^7.12.13",
"saveSpec": null,
"fetchSpec": "^7.12.13"
},
"_requiredBy": [
"/@vue/babel-preset-app"
],
"_resolved": "https://registry.npmjs.org/@babel/plugin-proposal-decorators/-/plugin-proposal-decorators-7.22.10.tgz",
"_shasum": "d6a8c3a9018e1b13e6647f869c5ea56ff2b585d4",
"_spec": "@babel/plugin-proposal-decorators@^7.12.13",
"_where": "C:\\Users\\zhouxueli\\Desktop\\scheduling-app\\node_modules\\@vue\\babel-preset-app",
"author": {
"name": "The Babel Team",
"url": "https://babel.dev/team"
},
"bugs": {
"url": "https://github.com/babel/babel/issues"
},
"bundleDependencies": false,
"dependencies": {
"@babel/helper-create-class-features-plugin": "^7.22.10",
"@babel/helper-plugin-utils": "^7.22.5",
"@babel/helper-replace-supers": "^7.22.9",
"@babel/helper-split-export-declaration": "^7.22.6",
"@babel/plugin-syntax-decorators": "^7.22.10"
},
"deprecated": false,
"description": "Compile class and object decorators to ES5",
"devDependencies": {
"@babel/core": "^7.22.10",
"@babel/helper-plugin-test-runner": "^7.22.5",
"@babel/traverse": "^7.22.10",
"@types/charcodes": "^0.2.0",
"array.prototype.concat": "^1.0.2",
"babel-plugin-polyfill-es-shims": "^0.9.2",
"charcodes": "^0.2.0",
"object.getownpropertydescriptors": "^2.1.1"
},
"engines": {
"node": ">=6.9.0"
},
"homepage": "https://babel.dev/docs/en/next/babel-plugin-proposal-decorators",
"keywords": [
"babel",
"babel-plugin",
"decorators"
],
"license": "MIT",
"main": "./lib/index.js",
"name": "@babel/plugin-proposal-decorators",
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"publishConfig": {
"access": "public"
},
"repository": {
"type": "git",
"url": "git+https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-proposal-decorators"
},
"type": "commonjs",
"version": "7.22.10"
}