298 lines
37 KiB
JavaScript
298 lines
37 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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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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var _es6WeakMap = require('es6-weak-map');
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var _es6WeakMap2 = _interopRequireDefault(_es6WeakMap);
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var _scope = require('./scope');
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var _scope2 = _interopRequireDefault(_scope);
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var _assert = require('assert');
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var _assert2 = _interopRequireDefault(_assert);
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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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/**
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* @class ScopeManager
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*/
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var ScopeManager = function () {
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function ScopeManager(options) {
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_classCallCheck(this, ScopeManager);
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this.scopes = [];
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this.globalScope = null;
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this.__nodeToScope = new _es6WeakMap2.default();
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this.__currentScope = null;
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this.__options = options;
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this.__declaredVariables = new _es6WeakMap2.default();
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}
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_createClass(ScopeManager, [{
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key: '__useDirective',
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value: function __useDirective() {
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return this.__options.directive;
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}
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}, {
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key: '__isOptimistic',
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value: function __isOptimistic() {
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return this.__options.optimistic;
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}
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}, {
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key: '__ignoreEval',
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value: function __ignoreEval() {
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return this.__options.ignoreEval;
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}
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}, {
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key: '__isNodejsScope',
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value: function __isNodejsScope() {
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return this.__options.nodejsScope;
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}
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}, {
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key: 'isModule',
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value: function isModule() {
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return this.__options.sourceType === 'module';
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}
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}, {
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key: 'isImpliedStrict',
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value: function isImpliedStrict() {
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return this.__options.impliedStrict;
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}
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}, {
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key: 'isStrictModeSupported',
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value: function isStrictModeSupported() {
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return this.__options.ecmaVersion >= 5;
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}
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// Returns appropriate scope for this node.
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}, {
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key: '__get',
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value: function __get(node) {
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return this.__nodeToScope.get(node);
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}
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/**
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* Get variables that are declared by the node.
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*
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* "are declared by the node" means the node is same as `Variable.defs[].node` or `Variable.defs[].parent`.
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* If the node declares nothing, this method returns an empty array.
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* CAUTION: This API is experimental. See https://github.com/estools/escope/pull/69 for more details.
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*
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* @param {Esprima.Node} node - a node to get.
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* @returns {Variable[]} variables that declared by the node.
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*/
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}, {
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key: 'getDeclaredVariables',
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value: function getDeclaredVariables(node) {
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return this.__declaredVariables.get(node) || [];
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}
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/**
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* acquire scope from node.
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* @method ScopeManager#acquire
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* @param {Esprima.Node} node - node for the acquired scope.
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* @param {boolean=} inner - look up the most inner scope, default value is false.
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* @return {Scope?}
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*/
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}, {
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key: 'acquire',
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value: function acquire(node, inner) {
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var scopes, scope, i, iz;
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function predicate(scope) {
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if (scope.type === 'function' && scope.functionExpressionScope) {
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return false;
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}
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if (scope.type === 'TDZ') {
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return false;
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}
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return true;
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}
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scopes = this.__get(node);
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if (!scopes || scopes.length === 0) {
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return null;
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}
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// Heuristic selection from all scopes.
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// If you would like to get all scopes, please use ScopeManager#acquireAll.
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if (scopes.length === 1) {
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return scopes[0];
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}
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if (inner) {
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for (i = scopes.length - 1; i >= 0; --i) {
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scope = scopes[i];
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if (predicate(scope)) {
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return scope;
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}
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}
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} else {
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for (i = 0, iz = scopes.length; i < iz; ++i) {
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scope = scopes[i];
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if (predicate(scope)) {
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return scope;
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}
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}
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}
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return null;
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}
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/**
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* acquire all scopes from node.
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* @method ScopeManager#acquireAll
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* @param {Esprima.Node} node - node for the acquired scope.
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* @return {Scope[]?}
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*/
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}, {
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key: 'acquireAll',
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value: function acquireAll(node) {
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return this.__get(node);
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}
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/**
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* release the node.
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* @method ScopeManager#release
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* @param {Esprima.Node} node - releasing node.
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* @param {boolean=} inner - look up the most inner scope, default value is false.
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* @return {Scope?} upper scope for the node.
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*/
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}, {
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key: 'release',
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value: function release(node, inner) {
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var scopes, scope;
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scopes = this.__get(node);
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if (scopes && scopes.length) {
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scope = scopes[0].upper;
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if (!scope) {
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return null;
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}
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return this.acquire(scope.block, inner);
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}
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return null;
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}
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}, {
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key: 'attach',
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value: function attach() {}
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}, {
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key: 'detach',
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value: function detach() {}
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}, {
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key: '__nestScope',
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value: function __nestScope(scope) {
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if (scope instanceof _scope.GlobalScope) {
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(0, _assert2.default)(this.__currentScope === null);
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this.globalScope = scope;
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}
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this.__currentScope = scope;
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return scope;
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}
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}, {
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key: '__nestGlobalScope',
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value: function __nestGlobalScope(node) {
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return this.__nestScope(new _scope.GlobalScope(this, node));
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}
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}, {
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key: '__nestBlockScope',
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value: function __nestBlockScope(node, isMethodDefinition) {
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return this.__nestScope(new _scope.BlockScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestFunctionScope',
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value: function __nestFunctionScope(node, isMethodDefinition) {
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return this.__nestScope(new _scope.FunctionScope(this, this.__currentScope, node, isMethodDefinition));
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}
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}, {
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key: '__nestForScope',
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value: function __nestForScope(node) {
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return this.__nestScope(new _scope.ForScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestCatchScope',
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value: function __nestCatchScope(node) {
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return this.__nestScope(new _scope.CatchScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestWithScope',
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value: function __nestWithScope(node) {
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return this.__nestScope(new _scope.WithScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestClassScope',
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value: function __nestClassScope(node) {
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return this.__nestScope(new _scope.ClassScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestSwitchScope',
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value: function __nestSwitchScope(node) {
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return this.__nestScope(new _scope.SwitchScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestModuleScope',
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value: function __nestModuleScope(node) {
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return this.__nestScope(new _scope.ModuleScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestTDZScope',
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value: function __nestTDZScope(node) {
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return this.__nestScope(new _scope.TDZScope(this, this.__currentScope, node));
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}
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}, {
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key: '__nestFunctionExpressionNameScope',
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value: function __nestFunctionExpressionNameScope(node) {
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return this.__nestScope(new _scope.FunctionExpressionNameScope(this, this.__currentScope, node));
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}
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}, {
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key: '__isES6',
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value: function __isES6() {
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return this.__options.ecmaVersion >= 6;
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}
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}]);
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return ScopeManager;
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}();
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/* vim: set sw=4 ts=4 et tw=80 : */
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exports.default = ScopeManager;
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