177 lines
28 KiB
JavaScript
177 lines
28 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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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; }; }();
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var _estraverse = require('estraverse');
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var _esrecurse = require('esrecurse');
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var _esrecurse2 = _interopRequireDefault(_esrecurse);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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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; }
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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; } /*
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Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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function getLast(xs) {
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return xs[xs.length - 1] || null;
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}
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var PatternVisitor = function (_esrecurse$Visitor) {
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_inherits(PatternVisitor, _esrecurse$Visitor);
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_createClass(PatternVisitor, null, [{
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key: 'isPattern',
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value: function isPattern(node) {
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var nodeType = node.type;
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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;
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}
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}]);
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function PatternVisitor(options, rootPattern, callback) {
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_classCallCheck(this, PatternVisitor);
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var _this = _possibleConstructorReturn(this, Object.getPrototypeOf(PatternVisitor).call(this, null, options));
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_this.rootPattern = rootPattern;
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_this.callback = callback;
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_this.assignments = [];
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_this.rightHandNodes = [];
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_this.restElements = [];
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return _this;
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}
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_createClass(PatternVisitor, [{
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key: 'Identifier',
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value: function Identifier(pattern) {
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var lastRestElement = getLast(this.restElements);
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this.callback(pattern, {
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topLevel: pattern === this.rootPattern,
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rest: lastRestElement != null && lastRestElement.argument === pattern,
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assignments: this.assignments
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});
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}
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}, {
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key: 'Property',
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value: function Property(property) {
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// Computed property's key is a right hand node.
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if (property.computed) {
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this.rightHandNodes.push(property.key);
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}
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// If it's shorthand, its key is same as its value.
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// If it's shorthand and has its default value, its key is same as its value.left (the value is AssignmentPattern).
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// If it's not shorthand, the name of new variable is its value's.
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this.visit(property.value);
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}
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}, {
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key: 'ArrayPattern',
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value: function ArrayPattern(pattern) {
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var i, iz, element;
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for (i = 0, iz = pattern.elements.length; i < iz; ++i) {
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element = pattern.elements[i];
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this.visit(element);
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}
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}
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}, {
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key: 'AssignmentPattern',
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value: function AssignmentPattern(pattern) {
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this.assignments.push(pattern);
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this.visit(pattern.left);
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this.rightHandNodes.push(pattern.right);
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this.assignments.pop();
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}
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}, {
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key: 'RestElement',
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value: function RestElement(pattern) {
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this.restElements.push(pattern);
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this.visit(pattern.argument);
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this.restElements.pop();
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}
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}, {
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key: 'MemberExpression',
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value: function MemberExpression(node) {
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// Computed property's key is a right hand node.
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if (node.computed) {
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this.rightHandNodes.push(node.property);
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}
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// the object is only read, write to its property.
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this.rightHandNodes.push(node.object);
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}
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//
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// ForInStatement.left and AssignmentExpression.left are LeftHandSideExpression.
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// By spec, LeftHandSideExpression is Pattern or MemberExpression.
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// (see also: https://github.com/estree/estree/pull/20#issuecomment-74584758)
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// But espree 2.0 and esprima 2.0 parse to ArrayExpression, ObjectExpression, etc...
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//
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}, {
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key: 'SpreadElement',
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value: function SpreadElement(node) {
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this.visit(node.argument);
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}
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}, {
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key: 'ArrayExpression',
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value: function ArrayExpression(node) {
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node.elements.forEach(this.visit, this);
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}
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}, {
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key: 'AssignmentExpression',
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value: function AssignmentExpression(node) {
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this.assignments.push(node);
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this.visit(node.left);
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this.rightHandNodes.push(node.right);
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this.assignments.pop();
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}
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}, {
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key: 'CallExpression',
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value: function CallExpression(node) {
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var _this2 = this;
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// arguments are right hand nodes.
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node.arguments.forEach(function (a) {
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_this2.rightHandNodes.push(a);
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});
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this.visit(node.callee);
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}
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}]);
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return PatternVisitor;
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}(_esrecurse2.default.Visitor);
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/* vim: set sw=4 ts=4 et tw=80 : */
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exports.default = PatternVisitor;
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//# sourceMappingURL=data:application/json;base64,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