563 lines
17 KiB
JavaScript
563 lines
17 KiB
JavaScript
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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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function _helperPluginUtils() {
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const data = require("@babel/helper-plugin-utils");
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_helperPluginUtils = function () {
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return data;
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};
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return data;
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}
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function _core() {
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const data = require("@babel/core");
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_core = function () {
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return data;
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};
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return data;
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}
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var _default = (0, _helperPluginUtils().declare)((api, options) => {
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api.assertVersion(7);
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const {
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loose = false,
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useBuiltIns = false
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} = options;
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if (typeof loose !== "boolean") {
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throw new Error(`.loose must be a boolean or undefined`);
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}
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const arrayOnlySpread = loose;
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function getExtendsHelper(file) {
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return useBuiltIns ? _core().types.memberExpression(_core().types.identifier("Object"), _core().types.identifier("assign")) : file.addHelper("extends");
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}
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function variableDeclarationHasPattern(node) {
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for (const declar of node.declarations) {
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if (_core().types.isPattern(declar.id)) {
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return true;
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}
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}
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return false;
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}
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function hasRest(pattern) {
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for (const elem of pattern.elements) {
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if (_core().types.isRestElement(elem)) {
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return true;
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}
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}
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return false;
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}
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function hasObjectRest(pattern) {
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for (const elem of pattern.properties) {
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if (_core().types.isRestElement(elem)) {
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return true;
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}
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}
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return false;
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}
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const STOP_TRAVERSAL = {};
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const arrayUnpackVisitor = (node, ancestors, state) => {
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if (!ancestors.length) {
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return;
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}
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if (_core().types.isIdentifier(node) && _core().types.isReferenced(node, ancestors[ancestors.length - 1]) && state.bindings[node.name]) {
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state.deopt = true;
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throw STOP_TRAVERSAL;
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}
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};
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class DestructuringTransformer {
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constructor(opts) {
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this.blockHoist = opts.blockHoist;
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this.operator = opts.operator;
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this.arrays = {};
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this.nodes = opts.nodes || [];
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this.scope = opts.scope;
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this.kind = opts.kind;
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this.arrayOnlySpread = opts.arrayOnlySpread;
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this.addHelper = opts.addHelper;
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}
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buildVariableAssignment(id, init) {
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let op = this.operator;
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if (_core().types.isMemberExpression(id)) op = "=";
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let node;
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if (op) {
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node = _core().types.expressionStatement(_core().types.assignmentExpression(op, id, _core().types.cloneNode(init) || this.scope.buildUndefinedNode()));
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} else {
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node = _core().types.variableDeclaration(this.kind, [_core().types.variableDeclarator(id, _core().types.cloneNode(init))]);
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}
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node._blockHoist = this.blockHoist;
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return node;
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}
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buildVariableDeclaration(id, init) {
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const declar = _core().types.variableDeclaration("var", [_core().types.variableDeclarator(_core().types.cloneNode(id), _core().types.cloneNode(init))]);
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declar._blockHoist = this.blockHoist;
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return declar;
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}
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push(id, _init) {
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const init = _core().types.cloneNode(_init);
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if (_core().types.isObjectPattern(id)) {
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this.pushObjectPattern(id, init);
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} else if (_core().types.isArrayPattern(id)) {
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this.pushArrayPattern(id, init);
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} else if (_core().types.isAssignmentPattern(id)) {
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this.pushAssignmentPattern(id, init);
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} else {
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this.nodes.push(this.buildVariableAssignment(id, init));
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}
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}
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toArray(node, count) {
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if (this.arrayOnlySpread || _core().types.isIdentifier(node) && this.arrays[node.name]) {
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return node;
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} else {
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return this.scope.toArray(node, count);
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}
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}
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pushAssignmentPattern({
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left,
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right
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}, valueRef) {
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const tempId = this.scope.generateUidIdentifierBasedOnNode(valueRef);
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this.nodes.push(this.buildVariableDeclaration(tempId, valueRef));
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const tempConditional = _core().types.conditionalExpression(_core().types.binaryExpression("===", _core().types.cloneNode(tempId), this.scope.buildUndefinedNode()), right, _core().types.cloneNode(tempId));
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if (_core().types.isPattern(left)) {
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let patternId;
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let node;
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if (this.kind === "const") {
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patternId = this.scope.generateUidIdentifier(tempId.name);
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node = this.buildVariableDeclaration(patternId, tempConditional);
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} else {
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patternId = tempId;
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node = _core().types.expressionStatement(_core().types.assignmentExpression("=", _core().types.cloneNode(tempId), tempConditional));
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}
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this.nodes.push(node);
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this.push(left, patternId);
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} else {
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this.nodes.push(this.buildVariableAssignment(left, tempConditional));
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}
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}
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pushObjectRest(pattern, objRef, spreadProp, spreadPropIndex) {
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const keys = [];
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let allLiteral = true;
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for (let i = 0; i < pattern.properties.length; i++) {
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const prop = pattern.properties[i];
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if (i >= spreadPropIndex) break;
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if (_core().types.isRestElement(prop)) continue;
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const key = prop.key;
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if (_core().types.isIdentifier(key) && !prop.computed) {
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keys.push(_core().types.stringLiteral(key.name));
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} else if (_core().types.isTemplateLiteral(prop.key)) {
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keys.push(_core().types.cloneNode(prop.key));
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} else if (_core().types.isLiteral(key)) {
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keys.push(_core().types.stringLiteral(String(key.value)));
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} else {
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keys.push(_core().types.cloneNode(key));
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allLiteral = false;
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}
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}
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let value;
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if (keys.length === 0) {
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value = _core().types.callExpression(getExtendsHelper(this), [_core().types.objectExpression([]), _core().types.cloneNode(objRef)]);
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} else {
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let keyExpression = _core().types.arrayExpression(keys);
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if (!allLiteral) {
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keyExpression = _core().types.callExpression(_core().types.memberExpression(keyExpression, _core().types.identifier("map")), [this.addHelper("toPropertyKey")]);
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}
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value = _core().types.callExpression(this.addHelper(`objectWithoutProperties${loose ? "Loose" : ""}`), [_core().types.cloneNode(objRef), keyExpression]);
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}
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this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value));
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}
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pushObjectProperty(prop, propRef) {
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if (_core().types.isLiteral(prop.key)) prop.computed = true;
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const pattern = prop.value;
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const objRef = _core().types.memberExpression(_core().types.cloneNode(propRef), prop.key, prop.computed);
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if (_core().types.isPattern(pattern)) {
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this.push(pattern, objRef);
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} else {
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this.nodes.push(this.buildVariableAssignment(pattern, objRef));
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}
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}
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pushObjectPattern(pattern, objRef) {
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if (!pattern.properties.length) {
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this.nodes.push(_core().types.expressionStatement(_core().types.callExpression(this.addHelper("objectDestructuringEmpty"), [objRef])));
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}
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if (pattern.properties.length > 1 && !this.scope.isStatic(objRef)) {
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const temp = this.scope.generateUidIdentifierBasedOnNode(objRef);
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this.nodes.push(this.buildVariableDeclaration(temp, objRef));
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objRef = temp;
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}
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if (hasObjectRest(pattern)) {
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let copiedPattern;
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for (let i = 0; i < pattern.properties.length; i++) {
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const prop = pattern.properties[i];
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if (_core().types.isRestElement(prop)) {
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break;
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}
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const key = prop.key;
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if (prop.computed && !this.scope.isPure(key)) {
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const name = this.scope.generateUidIdentifierBasedOnNode(key);
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this.nodes.push(this.buildVariableDeclaration(name, key));
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if (!copiedPattern) {
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copiedPattern = pattern = Object.assign({}, pattern, {
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properties: pattern.properties.slice()
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});
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}
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copiedPattern.properties[i] = Object.assign({}, copiedPattern.properties[i], {
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key: name
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});
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}
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}
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}
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for (let i = 0; i < pattern.properties.length; i++) {
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const prop = pattern.properties[i];
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if (_core().types.isRestElement(prop)) {
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this.pushObjectRest(pattern, objRef, prop, i);
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} else {
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this.pushObjectProperty(prop, objRef);
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}
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}
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}
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canUnpackArrayPattern(pattern, arr) {
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if (!_core().types.isArrayExpression(arr)) return false;
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if (pattern.elements.length > arr.elements.length) return;
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if (pattern.elements.length < arr.elements.length && !hasRest(pattern)) {
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return false;
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}
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for (const elem of pattern.elements) {
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if (!elem) return false;
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if (_core().types.isMemberExpression(elem)) return false;
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}
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for (const elem of arr.elements) {
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if (_core().types.isSpreadElement(elem)) return false;
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if (_core().types.isCallExpression(elem)) return false;
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if (_core().types.isMemberExpression(elem)) return false;
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}
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const bindings = _core().types.getBindingIdentifiers(pattern);
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const state = {
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deopt: false,
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bindings
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};
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try {
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_core().types.traverse(arr, arrayUnpackVisitor, state);
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} catch (e) {
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if (e !== STOP_TRAVERSAL) throw e;
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}
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return !state.deopt;
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}
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pushUnpackedArrayPattern(pattern, arr) {
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for (let i = 0; i < pattern.elements.length; i++) {
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const elem = pattern.elements[i];
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if (_core().types.isRestElement(elem)) {
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this.push(elem.argument, _core().types.arrayExpression(arr.elements.slice(i)));
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} else {
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this.push(elem, arr.elements[i]);
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}
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}
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}
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pushArrayPattern(pattern, arrayRef) {
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if (!pattern.elements) return;
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if (this.canUnpackArrayPattern(pattern, arrayRef)) {
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return this.pushUnpackedArrayPattern(pattern, arrayRef);
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}
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const count = !hasRest(pattern) && pattern.elements.length;
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const toArray = this.toArray(arrayRef, count);
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if (_core().types.isIdentifier(toArray)) {
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arrayRef = toArray;
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} else {
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arrayRef = this.scope.generateUidIdentifierBasedOnNode(arrayRef);
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this.arrays[arrayRef.name] = true;
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this.nodes.push(this.buildVariableDeclaration(arrayRef, toArray));
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}
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for (let i = 0; i < pattern.elements.length; i++) {
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let elem = pattern.elements[i];
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if (!elem) continue;
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let elemRef;
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if (_core().types.isRestElement(elem)) {
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elemRef = this.toArray(arrayRef);
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elemRef = _core().types.callExpression(_core().types.memberExpression(elemRef, _core().types.identifier("slice")), [_core().types.numericLiteral(i)]);
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elem = elem.argument;
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} else {
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elemRef = _core().types.memberExpression(arrayRef, _core().types.numericLiteral(i), true);
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}
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this.push(elem, elemRef);
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}
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}
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init(pattern, ref) {
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if (!_core().types.isArrayExpression(ref) && !_core().types.isMemberExpression(ref)) {
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const memo = this.scope.maybeGenerateMemoised(ref, true);
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if (memo) {
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this.nodes.push(this.buildVariableDeclaration(memo, _core().types.cloneNode(ref)));
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ref = memo;
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}
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}
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this.push(pattern, ref);
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return this.nodes;
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}
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}
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return {
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name: "transform-destructuring",
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visitor: {
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ExportNamedDeclaration(path) {
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const declaration = path.get("declaration");
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if (!declaration.isVariableDeclaration()) return;
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if (!variableDeclarationHasPattern(declaration.node)) return;
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const specifiers = [];
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for (const name of Object.keys(path.getOuterBindingIdentifiers(path))) {
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specifiers.push(_core().types.exportSpecifier(_core().types.identifier(name), _core().types.identifier(name)));
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}
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path.replaceWith(declaration.node);
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path.insertAfter(_core().types.exportNamedDeclaration(null, specifiers));
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},
|
||
|
|
|
||
|
|
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();
|
||
|
|
|
||
|
|
if (node.body.body.length === 0 && path.isCompletionRecord()) {
|
||
|
|
node.body.body.unshift(_core().types.expressionStatement(scope.buildUndefinedNode()));
|
||
|
|
}
|
||
|
|
|
||
|
|
node.body.body.unshift(_core().types.expressionStatement(_core().types.assignmentExpression("=", left, temp)));
|
||
|
|
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,
|
||
|
|
arrayOnlySpread,
|
||
|
|
addHelper: name => this.addHelper(name)
|
||
|
|
});
|
||
|
|
destructuring.init(pattern, key);
|
||
|
|
path.ensureBlock();
|
||
|
|
const block = node.body;
|
||
|
|
block.body = nodes.concat(block.body);
|
||
|
|
},
|
||
|
|
|
||
|
|
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,
|
||
|
|
arrayOnlySpread,
|
||
|
|
addHelper: name => this.addHelper(name)
|
||
|
|
});
|
||
|
|
destructuring.init(pattern, ref);
|
||
|
|
node.body.body = nodes.concat(node.body.body);
|
||
|
|
},
|
||
|
|
|
||
|
|
AssignmentExpression(path) {
|
||
|
|
const {
|
||
|
|
node,
|
||
|
|
scope
|
||
|
|
} = path;
|
||
|
|
if (!_core().types.isPattern(node.left)) return;
|
||
|
|
const nodes = [];
|
||
|
|
const destructuring = new DestructuringTransformer({
|
||
|
|
operator: node.operator,
|
||
|
|
scope: scope,
|
||
|
|
nodes: nodes,
|
||
|
|
arrayOnlySpread,
|
||
|
|
addHelper: name => this.addHelper(name)
|
||
|
|
});
|
||
|
|
let ref;
|
||
|
|
|
||
|
|
if (path.isCompletionRecord() || !path.parentPath.isExpressionStatement()) {
|
||
|
|
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.arrays[ref.name] = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
destructuring.init(node.left, ref || node.right);
|
||
|
|
|
||
|
|
if (ref) {
|
||
|
|
if (path.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);
|
||
|
|
},
|
||
|
|
|
||
|
|
VariableDeclaration(path) {
|
||
|
|
const {
|
||
|
|
node,
|
||
|
|
scope,
|
||
|
|
parent
|
||
|
|
} = path;
|
||
|
|
if (_core().types.isForXStatement(parent)) return;
|
||
|
|
if (!parent || !path.container) return;
|
||
|
|
if (!variableDeclarationHasPattern(node)) return;
|
||
|
|
const nodeKind = node.kind;
|
||
|
|
const nodes = [];
|
||
|
|
let declar;
|
||
|
|
|
||
|
|
for (let i = 0; i < node.declarations.length; i++) {
|
||
|
|
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,
|
||
|
|
arrayOnlySpread,
|
||
|
|
addHelper: name => this.addHelper(name)
|
||
|
|
});
|
||
|
|
|
||
|
|
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(declar.id, _core().types.cloneNode(declar.init)), declar));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
let tail = null;
|
||
|
|
const nodesOut = [];
|
||
|
|
|
||
|
|
for (const node of nodes) {
|
||
|
|
if (tail !== null && _core().types.isVariableDeclaration(node)) {
|
||
|
|
tail.declarations.push(...node.declarations);
|
||
|
|
} else {
|
||
|
|
node.kind = nodeKind;
|
||
|
|
nodesOut.push(node);
|
||
|
|
tail = _core().types.isVariableDeclaration(node) ? node : null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (const nodeOut of nodesOut) {
|
||
|
|
if (!nodeOut.declarations) continue;
|
||
|
|
|
||
|
|
for (const declaration of nodeOut.declarations) {
|
||
|
|
const {
|
||
|
|
name
|
||
|
|
} = declaration.id;
|
||
|
|
|
||
|
|
if (scope.bindings[name]) {
|
||
|
|
scope.bindings[name].kind = nodeOut.kind;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (nodesOut.length === 1) {
|
||
|
|
path.replaceWith(nodesOut[0]);
|
||
|
|
} else {
|
||
|
|
path.replaceWithMultiple(nodesOut);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
exports.default = _default;
|