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Diffstat (limited to 'tools/node_modules/babel-eslint/node_modules/eslint-scope/lib/scope-manager.js')
-rw-r--r-- | tools/node_modules/babel-eslint/node_modules/eslint-scope/lib/scope-manager.js | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/tools/node_modules/babel-eslint/node_modules/eslint-scope/lib/scope-manager.js b/tools/node_modules/babel-eslint/node_modules/eslint-scope/lib/scope-manager.js new file mode 100644 index 0000000000..0cc75a03ba --- /dev/null +++ b/tools/node_modules/babel-eslint/node_modules/eslint-scope/lib/scope-manager.js @@ -0,0 +1,255 @@ +/* + Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com> + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ +"use strict"; + +/* eslint-disable no-underscore-dangle */ + +const Scope = require("./scope"); +const assert = require("assert"); + +const GlobalScope = Scope.GlobalScope; +const CatchScope = Scope.CatchScope; +const WithScope = Scope.WithScope; +const ModuleScope = Scope.ModuleScope; +const ClassScope = Scope.ClassScope; +const SwitchScope = Scope.SwitchScope; +const FunctionScope = Scope.FunctionScope; +const ForScope = Scope.ForScope; +const TDZScope = Scope.TDZScope; +const FunctionExpressionNameScope = Scope.FunctionExpressionNameScope; +const BlockScope = Scope.BlockScope; + +/** + * @class ScopeManager + */ +class ScopeManager { + constructor(options) { + this.scopes = []; + this.globalScope = null; + this.__nodeToScope = new WeakMap(); + this.__currentScope = null; + this.__options = options; + this.__declaredVariables = new WeakMap(); + } + + __useDirective() { + return this.__options.directive; + } + + __isOptimistic() { + return this.__options.optimistic; + } + + __ignoreEval() { + return this.__options.ignoreEval; + } + + __isNodejsScope() { + return this.__options.nodejsScope; + } + + isModule() { + return this.__options.sourceType === "module"; + } + + isImpliedStrict() { + return this.__options.impliedStrict; + } + + isStrictModeSupported() { + return this.__options.ecmaVersion >= 5; + } + + // Returns appropriate scope for this node. + __get(node) { + return this.__nodeToScope.get(node); + } + + /** + * Get variables that are declared by the node. + * + * "are declared by the node" means the node is same as `Variable.defs[].node` or `Variable.defs[].parent`. + * If the node declares nothing, this method returns an empty array. + * CAUTION: This API is experimental. See https://github.com/estools/escope/pull/69 for more details. + * + * @param {Espree.Node} node - a node to get. + * @returns {Variable[]} variables that declared by the node. + */ + getDeclaredVariables(node) { + return this.__declaredVariables.get(node) || []; + } + + /** + * acquire scope from node. + * @method ScopeManager#acquire + * @param {Espree.Node} node - node for the acquired scope. + * @param {boolean=} inner - look up the most inner scope, default value is false. + * @returns {Scope?} Scope from node + */ + acquire(node, inner) { + + /** + * predicate + * @param {Scope} testScope - scope to test + * @returns {boolean} predicate + */ + function predicate(testScope) { + if (testScope.type === "function" && testScope.functionExpressionScope) { + return false; + } + if (testScope.type === "TDZ") { + return false; + } + return true; + } + + const scopes = this.__get(node); + + if (!scopes || scopes.length === 0) { + return null; + } + + // Heuristic selection from all scopes. + // If you would like to get all scopes, please use ScopeManager#acquireAll. + if (scopes.length === 1) { + return scopes[0]; + } + + if (inner) { + for (let i = scopes.length - 1; i >= 0; --i) { + const scope = scopes[i]; + + if (predicate(scope)) { + return scope; + } + } + } else { + for (let i = 0, iz = scopes.length; i < iz; ++i) { + const scope = scopes[i]; + + if (predicate(scope)) { + return scope; + } + } + } + + return null; + } + + /** + * acquire all scopes from node. + * @method ScopeManager#acquireAll + * @param {Espree.Node} node - node for the acquired scope. + * @returns {Scopes?} Scope array + */ + acquireAll(node) { + return this.__get(node); + } + + /** + * release the node. + * @method ScopeManager#release + * @param {Espree.Node} node - releasing node. + * @param {boolean=} inner - look up the most inner scope, default value is false. + * @returns {Scope?} upper scope for the node. + */ + release(node, inner) { + const scopes = this.__get(node); + + if (scopes && scopes.length) { + const scope = scopes[0].upper; + + if (!scope) { + return null; + } + return this.acquire(scope.block, inner); + } + return null; + } + + attach() { } // eslint-disable-line class-methods-use-this + + detach() { } // eslint-disable-line class-methods-use-this + + __nestScope(scope) { + if (scope instanceof GlobalScope) { + assert(this.__currentScope === null); + this.globalScope = scope; + } + this.__currentScope = scope; + return scope; + } + + __nestGlobalScope(node) { + return this.__nestScope(new GlobalScope(this, node)); + } + + __nestBlockScope(node) { + return this.__nestScope(new BlockScope(this, this.__currentScope, node)); + } + + __nestFunctionScope(node, isMethodDefinition) { + return this.__nestScope(new FunctionScope(this, this.__currentScope, node, isMethodDefinition)); + } + + __nestForScope(node) { + return this.__nestScope(new ForScope(this, this.__currentScope, node)); + } + + __nestCatchScope(node) { + return this.__nestScope(new CatchScope(this, this.__currentScope, node)); + } + + __nestWithScope(node) { + return this.__nestScope(new WithScope(this, this.__currentScope, node)); + } + + __nestClassScope(node) { + return this.__nestScope(new ClassScope(this, this.__currentScope, node)); + } + + __nestSwitchScope(node) { + return this.__nestScope(new SwitchScope(this, this.__currentScope, node)); + } + + __nestModuleScope(node) { + return this.__nestScope(new ModuleScope(this, this.__currentScope, node)); + } + + __nestTDZScope(node) { + return this.__nestScope(new TDZScope(this, this.__currentScope, node)); + } + + __nestFunctionExpressionNameScope(node) { + return this.__nestScope(new FunctionExpressionNameScope(this, this.__currentScope, node)); + } + + __isES6() { + return this.__options.ecmaVersion >= 6; + } +} + +module.exports = ScopeManager; + +/* vim: set sw=4 ts=4 et tw=80 : */ |