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- 'use strict';
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
- var _estraverse = require('estraverse');
- var _esrecurse = require('esrecurse');
- var _esrecurse2 = _interopRequireDefault(_esrecurse);
- function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
- function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
- function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
- function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
- function getLast(xs) {
- return xs[xs.length - 1] || null;
- }
- var PatternVisitor = function (_esrecurse$Visitor) {
- _inherits(PatternVisitor, _esrecurse$Visitor);
- _createClass(PatternVisitor, null, [{
- key: 'isPattern',
- value: function isPattern(node) {
- var nodeType = node.type;
- return nodeType === _estraverse.Syntax.Identifier || nodeType === _estraverse.Syntax.ObjectPattern || nodeType === _estraverse.Syntax.ArrayPattern || nodeType === _estraverse.Syntax.SpreadElement || nodeType === _estraverse.Syntax.RestElement || nodeType === _estraverse.Syntax.AssignmentPattern;
- }
- }]);
- function PatternVisitor(options, rootPattern, callback) {
- _classCallCheck(this, PatternVisitor);
- var _this = _possibleConstructorReturn(this, Object.getPrototypeOf(PatternVisitor).call(this, null, options));
- _this.rootPattern = rootPattern;
- _this.callback = callback;
- _this.assignments = [];
- _this.rightHandNodes = [];
- _this.restElements = [];
- return _this;
- }
- _createClass(PatternVisitor, [{
- key: 'Identifier',
- value: function Identifier(pattern) {
- var lastRestElement = getLast(this.restElements);
- this.callback(pattern, {
- topLevel: pattern === this.rootPattern,
- rest: lastRestElement != null && lastRestElement.argument === pattern,
- assignments: this.assignments
- });
- }
- }, {
- key: 'Property',
- value: function Property(property) {
-
- if (property.computed) {
- this.rightHandNodes.push(property.key);
- }
-
-
-
- this.visit(property.value);
- }
- }, {
- key: 'ArrayPattern',
- value: function ArrayPattern(pattern) {
- var i, iz, element;
- for (i = 0, iz = pattern.elements.length; i < iz; ++i) {
- element = pattern.elements[i];
- this.visit(element);
- }
- }
- }, {
- key: 'AssignmentPattern',
- value: function AssignmentPattern(pattern) {
- this.assignments.push(pattern);
- this.visit(pattern.left);
- this.rightHandNodes.push(pattern.right);
- this.assignments.pop();
- }
- }, {
- key: 'RestElement',
- value: function RestElement(pattern) {
- this.restElements.push(pattern);
- this.visit(pattern.argument);
- this.restElements.pop();
- }
- }, {
- key: 'MemberExpression',
- value: function MemberExpression(node) {
-
- if (node.computed) {
- this.rightHandNodes.push(node.property);
- }
-
- this.rightHandNodes.push(node.object);
- }
-
-
-
-
-
-
- }, {
- key: 'SpreadElement',
- value: function SpreadElement(node) {
- this.visit(node.argument);
- }
- }, {
- key: 'ArrayExpression',
- value: function ArrayExpression(node) {
- node.elements.forEach(this.visit, this);
- }
- }, {
- key: 'AssignmentExpression',
- value: function AssignmentExpression(node) {
- this.assignments.push(node);
- this.visit(node.left);
- this.rightHandNodes.push(node.right);
- this.assignments.pop();
- }
- }, {
- key: 'CallExpression',
- value: function CallExpression(node) {
- var _this2 = this;
-
- node.arguments.forEach(function (a) {
- _this2.rightHandNodes.push(a);
- });
- this.visit(node.callee);
- }
- }]);
- return PatternVisitor;
- }(_esrecurse2.default.Visitor);
- exports.default = PatternVisitor;
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