551 lines
17 KiB
JavaScript
551 lines
17 KiB
JavaScript
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"use strict";
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exports.__esModule = true;
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var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");
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var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
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var _getIterator2 = require("babel-runtime/core-js/get-iterator");
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var _getIterator3 = _interopRequireDefault(_getIterator2);
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exports.default = function (_ref) {
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var t = _ref.types;
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function variableDeclarationHasPattern(node) {
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for (var _iterator = node.declarations, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) {
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var _ref2;
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if (_isArray) {
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if (_i >= _iterator.length) break;
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_ref2 = _iterator[_i++];
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} else {
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_i = _iterator.next();
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if (_i.done) break;
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_ref2 = _i.value;
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}
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var declar = _ref2;
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if (t.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 (var _iterator2 = pattern.elements, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : (0, _getIterator3.default)(_iterator2);;) {
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var _ref3;
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if (_isArray2) {
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if (_i2 >= _iterator2.length) break;
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_ref3 = _iterator2[_i2++];
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} else {
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_i2 = _iterator2.next();
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if (_i2.done) break;
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_ref3 = _i2.value;
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}
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var elem = _ref3;
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if (t.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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var arrayUnpackVisitor = {
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ReferencedIdentifier: function ReferencedIdentifier(path, state) {
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if (state.bindings[path.node.name]) {
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state.deopt = true;
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path.stop();
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}
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}
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};
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var DestructuringTransformer = function () {
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function DestructuringTransformer(opts) {
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(0, _classCallCheck3.default)(this, DestructuringTransformer);
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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.file = opts.file;
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this.kind = opts.kind;
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}
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DestructuringTransformer.prototype.buildVariableAssignment = function buildVariableAssignment(id, init) {
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var op = this.operator;
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if (t.isMemberExpression(id)) op = "=";
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var node = void 0;
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if (op) {
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node = t.expressionStatement(t.assignmentExpression(op, id, init));
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} else {
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node = t.variableDeclaration(this.kind, [t.variableDeclarator(id, 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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DestructuringTransformer.prototype.buildVariableDeclaration = function buildVariableDeclaration(id, init) {
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var declar = t.variableDeclaration("var", [t.variableDeclarator(id, init)]);
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declar._blockHoist = this.blockHoist;
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return declar;
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};
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DestructuringTransformer.prototype.push = function push(id, init) {
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if (t.isObjectPattern(id)) {
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this.pushObjectPattern(id, init);
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} else if (t.isArrayPattern(id)) {
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this.pushArrayPattern(id, init);
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} else if (t.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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DestructuringTransformer.prototype.toArray = function toArray(node, count) {
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if (this.file.opts.loose || t.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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DestructuringTransformer.prototype.pushAssignmentPattern = function pushAssignmentPattern(pattern, valueRef) {
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var tempValueRef = this.scope.generateUidIdentifierBasedOnNode(valueRef);
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var declar = t.variableDeclaration("var", [t.variableDeclarator(tempValueRef, valueRef)]);
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declar._blockHoist = this.blockHoist;
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this.nodes.push(declar);
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var tempConditional = t.conditionalExpression(t.binaryExpression("===", tempValueRef, t.identifier("undefined")), pattern.right, tempValueRef);
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var left = pattern.left;
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if (t.isPattern(left)) {
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var tempValueDefault = t.expressionStatement(t.assignmentExpression("=", tempValueRef, tempConditional));
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tempValueDefault._blockHoist = this.blockHoist;
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this.nodes.push(tempValueDefault);
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this.push(left, tempValueRef);
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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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DestructuringTransformer.prototype.pushObjectRest = function pushObjectRest(pattern, objRef, spreadProp, spreadPropIndex) {
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var keys = [];
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for (var i = 0; i < pattern.properties.length; i++) {
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var prop = pattern.properties[i];
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if (i >= spreadPropIndex) break;
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if (t.isRestProperty(prop)) continue;
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var key = prop.key;
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if (t.isIdentifier(key) && !prop.computed) key = t.stringLiteral(prop.key.name);
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keys.push(key);
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}
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keys = t.arrayExpression(keys);
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var value = t.callExpression(this.file.addHelper("objectWithoutProperties"), [objRef, keys]);
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this.nodes.push(this.buildVariableAssignment(spreadProp.argument, value));
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};
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DestructuringTransformer.prototype.pushObjectProperty = function pushObjectProperty(prop, propRef) {
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if (t.isLiteral(prop.key)) prop.computed = true;
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var pattern = prop.value;
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var objRef = t.memberExpression(propRef, prop.key, prop.computed);
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if (t.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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DestructuringTransformer.prototype.pushObjectPattern = function pushObjectPattern(pattern, objRef) {
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if (!pattern.properties.length) {
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this.nodes.push(t.expressionStatement(t.callExpression(this.file.addHelper("objectDestructuringEmpty"), [objRef])));
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}
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if (pattern.properties.length > 1 && !this.scope.isStatic(objRef)) {
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var 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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for (var i = 0; i < pattern.properties.length; i++) {
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var prop = pattern.properties[i];
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if (t.isRestProperty(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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DestructuringTransformer.prototype.canUnpackArrayPattern = function canUnpackArrayPattern(pattern, arr) {
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if (!t.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)) return false;
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for (var _iterator3 = pattern.elements, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : (0, _getIterator3.default)(_iterator3);;) {
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var _ref4;
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if (_isArray3) {
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if (_i3 >= _iterator3.length) break;
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_ref4 = _iterator3[_i3++];
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} else {
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_i3 = _iterator3.next();
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if (_i3.done) break;
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_ref4 = _i3.value;
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}
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var elem = _ref4;
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if (!elem) return false;
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if (t.isMemberExpression(elem)) return false;
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}
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for (var _iterator4 = arr.elements, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : (0, _getIterator3.default)(_iterator4);;) {
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var _ref5;
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if (_isArray4) {
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if (_i4 >= _iterator4.length) break;
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_ref5 = _iterator4[_i4++];
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} else {
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_i4 = _iterator4.next();
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if (_i4.done) break;
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_ref5 = _i4.value;
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}
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var _elem = _ref5;
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if (t.isSpreadElement(_elem)) return false;
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if (t.isCallExpression(_elem)) return false;
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if (t.isMemberExpression(_elem)) return false;
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}
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var bindings = t.getBindingIdentifiers(pattern);
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var state = { deopt: false, bindings: bindings };
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this.scope.traverse(arr, arrayUnpackVisitor, state);
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return !state.deopt;
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};
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DestructuringTransformer.prototype.pushUnpackedArrayPattern = function pushUnpackedArrayPattern(pattern, arr) {
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for (var i = 0; i < pattern.elements.length; i++) {
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var elem = pattern.elements[i];
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if (t.isRestElement(elem)) {
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this.push(elem.argument, t.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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DestructuringTransformer.prototype.pushArrayPattern = function 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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var count = !hasRest(pattern) && pattern.elements.length;
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var toArray = this.toArray(arrayRef, count);
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if (t.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 (var i = 0; i < pattern.elements.length; i++) {
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var elem = pattern.elements[i];
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if (!elem) continue;
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var elemRef = void 0;
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if (t.isRestElement(elem)) {
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elemRef = this.toArray(arrayRef);
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elemRef = t.callExpression(t.memberExpression(elemRef, t.identifier("slice")), [t.numericLiteral(i)]);
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elem = elem.argument;
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} else {
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elemRef = t.memberExpression(arrayRef, t.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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DestructuringTransformer.prototype.init = function init(pattern, ref) {
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if (!t.isArrayExpression(ref) && !t.isMemberExpression(ref)) {
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var memo = this.scope.maybeGenerateMemoised(ref, true);
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if (memo) {
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this.nodes.push(this.buildVariableDeclaration(memo, 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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return DestructuringTransformer;
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}();
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return {
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visitor: {
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ExportNamedDeclaration: function ExportNamedDeclaration(path) {
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var 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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var specifiers = [];
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for (var name in path.getOuterBindingIdentifiers(path)) {
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var id = t.identifier(name);
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specifiers.push(t.exportSpecifier(id, id));
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}
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path.replaceWith(declaration.node);
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path.insertAfter(t.exportNamedDeclaration(null, specifiers));
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},
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ForXStatement: function ForXStatement(path, file) {
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var node = path.node,
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scope = path.scope;
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var left = node.left;
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if (t.isPattern(left)) {
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var temp = scope.generateUidIdentifier("ref");
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node.left = t.variableDeclaration("var", [t.variableDeclarator(temp)]);
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path.ensureBlock();
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node.body.body.unshift(t.variableDeclaration("var", [t.variableDeclarator(left, temp)]));
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return;
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}
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if (!t.isVariableDeclaration(left)) return;
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var pattern = left.declarations[0].id;
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if (!t.isPattern(pattern)) return;
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var key = scope.generateUidIdentifier("ref");
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node.left = t.variableDeclaration(left.kind, [t.variableDeclarator(key, null)]);
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var nodes = [];
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var destructuring = new DestructuringTransformer({
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kind: left.kind,
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file: file,
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scope: scope,
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nodes: nodes
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});
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destructuring.init(pattern, key);
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path.ensureBlock();
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var block = node.body;
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block.body = nodes.concat(block.body);
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|
|
},
|
||
|
|
CatchClause: function CatchClause(_ref6, file) {
|
||
|
|
var node = _ref6.node,
|
||
|
|
scope = _ref6.scope;
|
||
|
|
|
||
|
|
var pattern = node.param;
|
||
|
|
if (!t.isPattern(pattern)) return;
|
||
|
|
|
||
|
|
var ref = scope.generateUidIdentifier("ref");
|
||
|
|
node.param = ref;
|
||
|
|
|
||
|
|
var nodes = [];
|
||
|
|
|
||
|
|
var destructuring = new DestructuringTransformer({
|
||
|
|
kind: "let",
|
||
|
|
file: file,
|
||
|
|
scope: scope,
|
||
|
|
nodes: nodes
|
||
|
|
});
|
||
|
|
destructuring.init(pattern, ref);
|
||
|
|
|
||
|
|
node.body.body = nodes.concat(node.body.body);
|
||
|
|
},
|
||
|
|
AssignmentExpression: function AssignmentExpression(path, file) {
|
||
|
|
var node = path.node,
|
||
|
|
scope = path.scope;
|
||
|
|
|
||
|
|
if (!t.isPattern(node.left)) return;
|
||
|
|
|
||
|
|
var nodes = [];
|
||
|
|
|
||
|
|
var destructuring = new DestructuringTransformer({
|
||
|
|
operator: node.operator,
|
||
|
|
file: file,
|
||
|
|
scope: scope,
|
||
|
|
nodes: nodes
|
||
|
|
});
|
||
|
|
|
||
|
|
var ref = void 0;
|
||
|
|
if (path.isCompletionRecord() || !path.parentPath.isExpressionStatement()) {
|
||
|
|
ref = scope.generateUidIdentifierBasedOnNode(node.right, "ref");
|
||
|
|
|
||
|
|
nodes.push(t.variableDeclaration("var", [t.variableDeclarator(ref, node.right)]));
|
||
|
|
|
||
|
|
if (t.isArrayExpression(node.right)) {
|
||
|
|
destructuring.arrays[ref.name] = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
destructuring.init(node.left, ref || node.right);
|
||
|
|
|
||
|
|
if (ref) {
|
||
|
|
nodes.push(t.expressionStatement(ref));
|
||
|
|
}
|
||
|
|
|
||
|
|
path.replaceWithMultiple(nodes);
|
||
|
|
},
|
||
|
|
VariableDeclaration: function VariableDeclaration(path, file) {
|
||
|
|
var node = path.node,
|
||
|
|
scope = path.scope,
|
||
|
|
parent = path.parent;
|
||
|
|
|
||
|
|
if (t.isForXStatement(parent)) return;
|
||
|
|
if (!parent || !path.container) return;
|
||
|
|
if (!variableDeclarationHasPattern(node)) return;
|
||
|
|
|
||
|
|
var nodes = [];
|
||
|
|
var declar = void 0;
|
||
|
|
|
||
|
|
for (var i = 0; i < node.declarations.length; i++) {
|
||
|
|
declar = node.declarations[i];
|
||
|
|
|
||
|
|
var patternId = declar.init;
|
||
|
|
var pattern = declar.id;
|
||
|
|
|
||
|
|
var destructuring = new DestructuringTransformer({
|
||
|
|
blockHoist: node._blockHoist,
|
||
|
|
nodes: nodes,
|
||
|
|
scope: scope,
|
||
|
|
kind: node.kind,
|
||
|
|
file: file
|
||
|
|
});
|
||
|
|
|
||
|
|
if (t.isPattern(pattern)) {
|
||
|
|
destructuring.init(pattern, patternId);
|
||
|
|
|
||
|
|
if (+i !== node.declarations.length - 1) {
|
||
|
|
t.inherits(nodes[nodes.length - 1], declar);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
nodes.push(t.inherits(destructuring.buildVariableAssignment(declar.id, declar.init), declar));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var nodesOut = [];
|
||
|
|
for (var _iterator5 = nodes, _isArray5 = Array.isArray(_iterator5), _i5 = 0, _iterator5 = _isArray5 ? _iterator5 : (0, _getIterator3.default)(_iterator5);;) {
|
||
|
|
var _ref7;
|
||
|
|
|
||
|
|
if (_isArray5) {
|
||
|
|
if (_i5 >= _iterator5.length) break;
|
||
|
|
_ref7 = _iterator5[_i5++];
|
||
|
|
} else {
|
||
|
|
_i5 = _iterator5.next();
|
||
|
|
if (_i5.done) break;
|
||
|
|
_ref7 = _i5.value;
|
||
|
|
}
|
||
|
|
|
||
|
|
var _node = _ref7;
|
||
|
|
|
||
|
|
var tail = nodesOut[nodesOut.length - 1];
|
||
|
|
if (tail && t.isVariableDeclaration(tail) && t.isVariableDeclaration(_node) && tail.kind === _node.kind) {
|
||
|
|
var _tail$declarations;
|
||
|
|
|
||
|
|
(_tail$declarations = tail.declarations).push.apply(_tail$declarations, _node.declarations);
|
||
|
|
} else {
|
||
|
|
nodesOut.push(_node);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var _iterator6 = nodesOut, _isArray6 = Array.isArray(_iterator6), _i6 = 0, _iterator6 = _isArray6 ? _iterator6 : (0, _getIterator3.default)(_iterator6);;) {
|
||
|
|
var _ref8;
|
||
|
|
|
||
|
|
if (_isArray6) {
|
||
|
|
if (_i6 >= _iterator6.length) break;
|
||
|
|
_ref8 = _iterator6[_i6++];
|
||
|
|
} else {
|
||
|
|
_i6 = _iterator6.next();
|
||
|
|
if (_i6.done) break;
|
||
|
|
_ref8 = _i6.value;
|
||
|
|
}
|
||
|
|
|
||
|
|
var nodeOut = _ref8;
|
||
|
|
|
||
|
|
if (!nodeOut.declarations) continue;
|
||
|
|
for (var _iterator7 = nodeOut.declarations, _isArray7 = Array.isArray(_iterator7), _i7 = 0, _iterator7 = _isArray7 ? _iterator7 : (0, _getIterator3.default)(_iterator7);;) {
|
||
|
|
var _ref9;
|
||
|
|
|
||
|
|
if (_isArray7) {
|
||
|
|
if (_i7 >= _iterator7.length) break;
|
||
|
|
_ref9 = _iterator7[_i7++];
|
||
|
|
} else {
|
||
|
|
_i7 = _iterator7.next();
|
||
|
|
if (_i7.done) break;
|
||
|
|
_ref9 = _i7.value;
|
||
|
|
}
|
||
|
|
|
||
|
|
var declaration = _ref9;
|
||
|
|
var name = declaration.id.name;
|
||
|
|
|
||
|
|
if (scope.bindings[name]) {
|
||
|
|
scope.bindings[name].kind = nodeOut.kind;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (nodesOut.length === 1) {
|
||
|
|
path.replaceWith(nodesOut[0]);
|
||
|
|
} else {
|
||
|
|
path.replaceWithMultiple(nodesOut);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
||
|
|
|
||
|
|
module.exports = exports["default"];
|