Updated the files.

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Batuhan Berk Başoğlu 2024-02-08 19:38:41 -05:00
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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-transform-destructuring
> Compile ES2015 destructuring to ES5
See our website [@babel/plugin-transform-destructuring](https://babeljs.io/docs/babel-plugin-transform-destructuring) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/plugin-transform-destructuring
```
or using yarn:
```sh
yarn add @babel/plugin-transform-destructuring --dev
```

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'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
var helperPluginUtils = require('@babel/helper-plugin-utils');
var core = require('@babel/core');
function isPureVoid(node) {
return core.types.isUnaryExpression(node) && node.operator === "void" && core.types.isPureish(node.argument);
}
function unshiftForXStatementBody(statementPath, newStatements) {
statementPath.ensureBlock();
const {
scope,
node
} = statementPath;
const bodyScopeBindings = statementPath.get("body").scope.bindings;
const hasShadowedBlockScopedBindings = Object.keys(bodyScopeBindings).some(name => scope.hasBinding(name));
if (hasShadowedBlockScopedBindings) {
node.body = core.types.blockStatement([...newStatements, node.body]);
} else {
node.body.body.unshift(...newStatements);
}
}
function hasArrayRest(pattern) {
return pattern.elements.some(elem => core.types.isRestElement(elem));
}
function hasObjectRest(pattern) {
return pattern.properties.some(prop => core.types.isRestElement(prop));
}
const STOP_TRAVERSAL = {};
const arrayUnpackVisitor = (node, ancestors, state) => {
if (!ancestors.length) {
return;
}
if (core.types.isIdentifier(node) && core.types.isReferenced(node, ancestors[ancestors.length - 1].node) && state.bindings[node.name]) {
state.deopt = true;
throw STOP_TRAVERSAL;
}
};
class DestructuringTransformer {
constructor(opts) {
this.blockHoist = void 0;
this.operator = void 0;
this.arrayRefSet = void 0;
this.nodes = void 0;
this.scope = void 0;
this.kind = void 0;
this.iterableIsArray = void 0;
this.arrayLikeIsIterable = void 0;
this.objectRestNoSymbols = void 0;
this.useBuiltIns = void 0;
this.addHelper = void 0;
this.blockHoist = opts.blockHoist;
this.operator = opts.operator;
this.arrayRefSet = new Set();
this.nodes = opts.nodes || [];
this.scope = opts.scope;
this.kind = opts.kind;
this.iterableIsArray = opts.iterableIsArray;
this.arrayLikeIsIterable = opts.arrayLikeIsIterable;
this.objectRestNoSymbols = opts.objectRestNoSymbols;
this.useBuiltIns = opts.useBuiltIns;
this.addHelper = opts.addHelper;
}
getExtendsHelper() {
return this.useBuiltIns ? core.types.memberExpression(core.types.identifier("Object"), core.types.identifier("assign")) : this.addHelper("extends");
}
buildVariableAssignment(id, init) {
let op = this.operator;
if (core.types.isMemberExpression(id) || core.types.isOptionalMemberExpression(id)) op = "=";
let node;
if (op) {
node = core.types.expressionStatement(core.types.assignmentExpression(op, id, core.types.cloneNode(init) || this.scope.buildUndefinedNode()));
} else {
let nodeInit;
if ((this.kind === "const" || this.kind === "using") && init === null) {
nodeInit = this.scope.buildUndefinedNode();
} else {
nodeInit = core.types.cloneNode(init);
}
node = core.types.variableDeclaration(this.kind, [core.types.variableDeclarator(id, nodeInit)]);
}
node._blockHoist = this.blockHoist;
return node;
}
buildVariableDeclaration(id, init) {
const declar = core.types.variableDeclaration("var", [core.types.variableDeclarator(core.types.cloneNode(id), core.types.cloneNode(init))]);
declar._blockHoist = this.blockHoist;
return declar;
}
push(id, _init) {
const init = core.types.cloneNode(_init);
if (core.types.isObjectPattern(id)) {
this.pushObjectPattern(id, init);
} else if (core.types.isArrayPattern(id)) {
this.pushArrayPattern(id, init);
} else if (core.types.isAssignmentPattern(id)) {
this.pushAssignmentPattern(id, init);
} else {
this.nodes.push(this.buildVariableAssignment(id, init));
}
}
toArray(node, count) {
if (this.iterableIsArray || core.types.isIdentifier(node) && this.arrayRefSet.has(node.name)) {
return node;
} else {
return this.scope.toArray(node, count, this.arrayLikeIsIterable);
}
}
pushAssignmentPattern({
left,
right
}, valueRef) {
if (isPureVoid(valueRef)) {
this.push(left, right);
return;
}
const tempId = this.scope.generateUidIdentifierBasedOnNode(valueRef);
this.nodes.push(this.buildVariableDeclaration(tempId, valueRef));
const tempConditional = core.types.conditionalExpression(core.types.binaryExpression("===", core.types.cloneNode(tempId), this.scope.buildUndefinedNode()), right, core.types.cloneNode(tempId));
if (core.types.isPattern(left)) {
let patternId;
let node;
if (this.kind === "const" || this.kind === "let" || this.kind === "using") {
patternId = this.scope.generateUidIdentifier(tempId.name);
node = this.buildVariableDeclaration(patternId, tempConditional);
} else {
patternId = tempId;
node = core.types.expressionStatement(core.types.assignmentExpression("=", core.types.cloneNode(tempId), tempConditional));
}
this.nodes.push(node);
this.push(left, patternId);
} else {
this.nodes.push(this.buildVariableAssignment(left, tempConditional));
}
}
pushObjectRest(pattern, objRef, spreadProp, spreadPropIndex) {
const value = buildObjectExcludingKeys(pattern.properties.slice(0, spreadPropIndex), objRef, this.scope, name => this.addHelper(name), this.objectRestNoSymbols, this.useBuiltIns);
this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value));
}
pushObjectProperty(prop, propRef) {
if (core.types.isLiteral(prop.key)) prop.computed = true;
const pattern = prop.value;
const objRef = core.types.memberExpression(core.types.cloneNode(propRef), prop.key, prop.computed);
if (core.types.isPattern(pattern)) {
this.push(pattern, objRef);
} else {
this.nodes.push(this.buildVariableAssignment(pattern, objRef));
}
}
pushObjectPattern(pattern, objRef) {
if (!pattern.properties.length) {
this.nodes.push(core.types.expressionStatement(core.types.callExpression(this.addHelper("objectDestructuringEmpty"), isPureVoid(objRef) ? [] : [objRef])));
return;
}
if (pattern.properties.length > 1 && !this.scope.isStatic(objRef)) {
const temp = this.scope.generateUidIdentifierBasedOnNode(objRef);
this.nodes.push(this.buildVariableDeclaration(temp, objRef));
objRef = temp;
}
if (hasObjectRest(pattern)) {
let copiedPattern;
for (let i = 0; i < pattern.properties.length; i++) {
const prop = pattern.properties[i];
if (core.types.isRestElement(prop)) {
break;
}
const key = prop.key;
if (prop.computed && !this.scope.isPure(key)) {
const name = this.scope.generateUidIdentifierBasedOnNode(key);
this.nodes.push(this.buildVariableDeclaration(name, key));
if (!copiedPattern) {
copiedPattern = pattern = Object.assign({}, pattern, {
properties: pattern.properties.slice()
});
}
copiedPattern.properties[i] = Object.assign({}, prop, {
key: name
});
}
}
}
for (let i = 0; i < pattern.properties.length; i++) {
const prop = pattern.properties[i];
if (core.types.isRestElement(prop)) {
this.pushObjectRest(pattern, objRef, prop, i);
} else {
this.pushObjectProperty(prop, objRef);
}
}
}
canUnpackArrayPattern(pattern, arr) {
if (!core.types.isArrayExpression(arr)) return false;
if (pattern.elements.length > arr.elements.length) return;
if (pattern.elements.length < arr.elements.length && !hasArrayRest(pattern)) {
return false;
}
for (const elem of pattern.elements) {
if (!elem) return false;
if (core.types.isMemberExpression(elem)) return false;
}
for (const elem of arr.elements) {
if (core.types.isSpreadElement(elem)) return false;
if (core.types.isCallExpression(elem)) return false;
if (core.types.isMemberExpression(elem)) return false;
}
const bindings = core.types.getBindingIdentifiers(pattern);
const state = {
deopt: false,
bindings
};
try {
core.types.traverse(arr, arrayUnpackVisitor, state);
} catch (e) {
if (e !== STOP_TRAVERSAL) throw e;
}
return !state.deopt;
}
pushUnpackedArrayPattern(pattern, arr) {
const holeToUndefined = el => el != null ? el : this.scope.buildUndefinedNode();
for (let i = 0; i < pattern.elements.length; i++) {
const elem = pattern.elements[i];
if (core.types.isRestElement(elem)) {
this.push(elem.argument, core.types.arrayExpression(arr.elements.slice(i).map(holeToUndefined)));
} else {
this.push(elem, holeToUndefined(arr.elements[i]));
}
}
}
pushArrayPattern(pattern, arrayRef) {
if (arrayRef === null) {
this.nodes.push(core.types.expressionStatement(core.types.callExpression(this.addHelper("objectDestructuringEmpty"), [])));
return;
}
if (!pattern.elements) return;
if (this.canUnpackArrayPattern(pattern, arrayRef)) {
this.pushUnpackedArrayPattern(pattern, arrayRef);
return;
}
const count = !hasArrayRest(pattern) && pattern.elements.length;
const toArray = this.toArray(arrayRef, count);
if (core.types.isIdentifier(toArray)) {
arrayRef = toArray;
} else {
arrayRef = this.scope.generateUidIdentifierBasedOnNode(arrayRef);
this.arrayRefSet.add(arrayRef.name);
this.nodes.push(this.buildVariableDeclaration(arrayRef, toArray));
}
for (let i = 0; i < pattern.elements.length; i++) {
const elem = pattern.elements[i];
if (!elem) continue;
let elemRef;
if (core.types.isRestElement(elem)) {
elemRef = this.toArray(arrayRef);
elemRef = core.types.callExpression(core.types.memberExpression(elemRef, core.types.identifier("slice")), [core.types.numericLiteral(i)]);
this.push(elem.argument, elemRef);
} else {
elemRef = core.types.memberExpression(arrayRef, core.types.numericLiteral(i), true);
this.push(elem, elemRef);
}
}
}
init(pattern, ref) {
if (!core.types.isArrayExpression(ref) && !core.types.isMemberExpression(ref)) {
const memo = this.scope.maybeGenerateMemoised(ref, true);
if (memo) {
this.nodes.push(this.buildVariableDeclaration(memo, core.types.cloneNode(ref)));
ref = memo;
}
}
this.push(pattern, ref);
return this.nodes;
}
}
function buildObjectExcludingKeys(excludedKeys, objRef, scope, addHelper, objectRestNoSymbols, useBuiltIns) {
const keys = [];
let allLiteral = true;
let hasTemplateLiteral = false;
for (let i = 0; i < excludedKeys.length; i++) {
const prop = excludedKeys[i];
const key = prop.key;
if (core.types.isIdentifier(key) && !prop.computed) {
keys.push(core.types.stringLiteral(key.name));
} else if (core.types.isTemplateLiteral(key)) {
keys.push(core.types.cloneNode(key));
hasTemplateLiteral = true;
} else if (core.types.isLiteral(key)) {
keys.push(core.types.stringLiteral(String(key.value)));
} else if (core.types.isPrivateName(key)) ; else {
keys.push(core.types.cloneNode(key));
allLiteral = false;
}
}
let value;
if (keys.length === 0) {
const extendsHelper = useBuiltIns ? core.types.memberExpression(core.types.identifier("Object"), core.types.identifier("assign")) : addHelper("extends");
value = core.types.callExpression(extendsHelper, [core.types.objectExpression([]), core.types.sequenceExpression([core.types.callExpression(addHelper("objectDestructuringEmpty"), [core.types.cloneNode(objRef)]), core.types.cloneNode(objRef)])]);
} else {
let keyExpression = core.types.arrayExpression(keys);
if (!allLiteral) {
keyExpression = core.types.callExpression(core.types.memberExpression(keyExpression, core.types.identifier("map")), [addHelper("toPropertyKey")]);
} else if (!hasTemplateLiteral && !core.types.isProgram(scope.block)) {
const programScope = scope.getProgramParent();
const id = programScope.generateUidIdentifier("excluded");
programScope.push({
id,
init: keyExpression,
kind: "const"
});
keyExpression = core.types.cloneNode(id);
}
value = core.types.callExpression(addHelper(`objectWithoutProperties${objectRestNoSymbols ? "Loose" : ""}`), [core.types.cloneNode(objRef), keyExpression]);
}
return value;
}
function convertVariableDeclaration(path, addHelper, arrayLikeIsIterable, iterableIsArray, objectRestNoSymbols, useBuiltIns) {
const {
node,
scope
} = path;
const nodeKind = node.kind;
const nodeLoc = node.loc;
const nodes = [];
for (let i = 0; i < node.declarations.length; i++) {
const declar = node.declarations[i];
const patternId = declar.init;
const pattern = declar.id;
const destructuring = new DestructuringTransformer({
blockHoist: node._blockHoist,
nodes: nodes,
scope: scope,
kind: node.kind,
iterableIsArray,
arrayLikeIsIterable,
useBuiltIns,
objectRestNoSymbols,
addHelper
});
if (core.types.isPattern(pattern)) {
destructuring.init(pattern, patternId);
if (+i !== node.declarations.length - 1) {
core.types.inherits(nodes[nodes.length - 1], declar);
}
} else {
nodes.push(core.types.inherits(destructuring.buildVariableAssignment(pattern, patternId), declar));
}
}
let tail = null;
let nodesOut = [];
for (const node of nodes) {
if (core.types.isVariableDeclaration(node)) {
if (tail !== null) {
tail.declarations.push(...node.declarations);
continue;
} else {
node.kind = nodeKind;
tail = node;
}
} else {
tail = null;
}
if (!node.loc) {
node.loc = nodeLoc;
}
nodesOut.push(node);
}
if (nodesOut.length === 2 && core.types.isVariableDeclaration(nodesOut[0]) && core.types.isExpressionStatement(nodesOut[1]) && core.types.isCallExpression(nodesOut[1].expression) && nodesOut[0].declarations.length === 1) {
const expr = nodesOut[1].expression;
expr.arguments = [nodesOut[0].declarations[0].init];
nodesOut = [expr];
} else {
if (core.types.isForStatement(path.parent, {
init: node
}) && !nodesOut.some(v => core.types.isVariableDeclaration(v))) {
for (let i = 0; i < nodesOut.length; i++) {
const node = nodesOut[i];
if (core.types.isExpressionStatement(node)) {
nodesOut[i] = node.expression;
}
}
}
}
if (nodesOut.length === 1) {
path.replaceWith(nodesOut[0]);
} else {
path.replaceWithMultiple(nodesOut);
}
scope.crawl();
}
function convertAssignmentExpression(path, addHelper, arrayLikeIsIterable, iterableIsArray, objectRestNoSymbols, useBuiltIns) {
const {
node,
scope,
parentPath
} = path;
const nodes = [];
const destructuring = new DestructuringTransformer({
operator: node.operator,
scope: scope,
nodes: nodes,
arrayLikeIsIterable,
iterableIsArray,
objectRestNoSymbols,
useBuiltIns,
addHelper
});
let ref;
if (!parentPath.isExpressionStatement() && !parentPath.isSequenceExpression() || path.isCompletionRecord()) {
ref = scope.generateUidIdentifierBasedOnNode(node.right, "ref");
nodes.push(core.types.variableDeclaration("var", [core.types.variableDeclarator(ref, node.right)]));
if (core.types.isArrayExpression(node.right)) {
destructuring.arrayRefSet.add(ref.name);
}
}
destructuring.init(node.left, ref || node.right);
if (ref) {
if (parentPath.isArrowFunctionExpression()) {
path.replaceWith(core.types.blockStatement([]));
nodes.push(core.types.returnStatement(core.types.cloneNode(ref)));
} else {
nodes.push(core.types.expressionStatement(core.types.cloneNode(ref)));
}
}
path.replaceWithMultiple(nodes);
scope.crawl();
}
function variableDeclarationHasPattern(node) {
for (const declar of node.declarations) {
if (core.types.isPattern(declar.id)) {
return true;
}
}
return false;
}
var index = helperPluginUtils.declare((api, options) => {
var _ref, _api$assumption, _ref2, _options$allowArrayLi, _ref3, _api$assumption2;
api.assertVersion(7);
const {
useBuiltIns = false
} = options;
const iterableIsArray = (_ref = (_api$assumption = api.assumption("iterableIsArray")) != null ? _api$assumption : options.loose) != null ? _ref : false;
const arrayLikeIsIterable = (_ref2 = (_options$allowArrayLi = options.allowArrayLike) != null ? _options$allowArrayLi : api.assumption("arrayLikeIsIterable")) != null ? _ref2 : false;
const objectRestNoSymbols = (_ref3 = (_api$assumption2 = api.assumption("objectRestNoSymbols")) != null ? _api$assumption2 : options.loose) != null ? _ref3 : false;
return {
name: "transform-destructuring",
visitor: {
ExportNamedDeclaration(path) {
const declaration = path.get("declaration");
if (!declaration.isVariableDeclaration()) return;
if (!variableDeclarationHasPattern(declaration.node)) return;
const specifiers = [];
for (const name of Object.keys(path.getOuterBindingIdentifiers())) {
specifiers.push(core.types.exportSpecifier(core.types.identifier(name), core.types.identifier(name)));
}
path.replaceWith(declaration.node);
path.insertAfter(core.types.exportNamedDeclaration(null, specifiers));
path.scope.crawl();
},
ForXStatement(path) {
const {
node,
scope
} = path;
const left = node.left;
if (core.types.isPattern(left)) {
const temp = scope.generateUidIdentifier("ref");
node.left = core.types.variableDeclaration("var", [core.types.variableDeclarator(temp)]);
path.ensureBlock();
const statementBody = path.node.body.body;
const nodes = [];
if (statementBody.length === 0 && path.isCompletionRecord()) {
nodes.unshift(core.types.expressionStatement(scope.buildUndefinedNode()));
}
nodes.unshift(core.types.expressionStatement(core.types.assignmentExpression("=", left, core.types.cloneNode(temp))));
unshiftForXStatementBody(path, nodes);
scope.crawl();
return;
}
if (!core.types.isVariableDeclaration(left)) return;
const pattern = left.declarations[0].id;
if (!core.types.isPattern(pattern)) return;
const key = scope.generateUidIdentifier("ref");
node.left = core.types.variableDeclaration(left.kind, [core.types.variableDeclarator(key, null)]);
const nodes = [];
const destructuring = new DestructuringTransformer({
kind: left.kind,
scope: scope,
nodes: nodes,
arrayLikeIsIterable,
iterableIsArray,
objectRestNoSymbols,
useBuiltIns,
addHelper: name => this.addHelper(name)
});
destructuring.init(pattern, key);
unshiftForXStatementBody(path, nodes);
scope.crawl();
},
CatchClause({
node,
scope
}) {
const pattern = node.param;
if (!core.types.isPattern(pattern)) return;
const ref = scope.generateUidIdentifier("ref");
node.param = ref;
const nodes = [];
const destructuring = new DestructuringTransformer({
kind: "let",
scope: scope,
nodes: nodes,
arrayLikeIsIterable,
iterableIsArray,
objectRestNoSymbols,
useBuiltIns,
addHelper: name => this.addHelper(name)
});
destructuring.init(pattern, ref);
node.body.body = [...nodes, ...node.body.body];
scope.crawl();
},
AssignmentExpression(path, state) {
if (!core.types.isPattern(path.node.left)) return;
convertAssignmentExpression(path, name => state.addHelper(name), arrayLikeIsIterable, iterableIsArray, objectRestNoSymbols, useBuiltIns);
},
VariableDeclaration(path, state) {
const {
node,
parent
} = path;
if (core.types.isForXStatement(parent)) return;
if (!parent || !path.container) return;
if (!variableDeclarationHasPattern(node)) return;
convertVariableDeclaration(path, name => state.addHelper(name), arrayLikeIsIterable, iterableIsArray, objectRestNoSymbols, useBuiltIns);
}
}
};
});
exports.buildObjectExcludingKeys = buildObjectExcludingKeys;
exports.default = index;
exports.unshiftForXStatementBody = unshiftForXStatementBody;
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{
"name": "@babel/plugin-transform-destructuring",
"version": "7.23.3",
"description": "Compile ES2015 destructuring to ES5",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel.git",
"directory": "packages/babel-plugin-transform-destructuring"
},
"homepage": "https://babel.dev/docs/en/next/babel-plugin-transform-destructuring",
"license": "MIT",
"publishConfig": {
"access": "public"
},
"main": "./lib/index.js",
"keywords": [
"babel-plugin"
],
"dependencies": {
"@babel/helper-plugin-utils": "^7.22.5"
},
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"devDependencies": {
"@babel/core": "^7.23.3",
"@babel/helper-plugin-test-runner": "^7.22.5",
"@babel/traverse": "^7.23.3"
},
"engines": {
"node": ">=6.9.0"
},
"author": "The Babel Team (https://babel.dev/team)",
"type": "commonjs"
}