--- /dev/null
+/**
+ * @fileoverview Main Espree file that converts Acorn into Esprima output.
+ *
+ * This file contains code from the following MIT-licensed projects:
+ * 1. Acorn
+ * 2. Babylon
+ * 3. Babel-ESLint
+ *
+ * This file also contains code from Esprima, which is BSD licensed.
+ *
+ * Acorn is Copyright 2012-2015 Acorn Contributors (https://github.com/marijnh/acorn/blob/master/AUTHORS)
+ * Babylon is Copyright 2014-2015 various contributors (https://github.com/babel/babel/blob/master/packages/babylon/AUTHORS)
+ * Babel-ESLint is Copyright 2014-2015 Sebastian McKenzie <sebmck@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.
+ *
+ * Esprima is Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
+ *
+ * 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.
+ */
+/* eslint no-undefined:0, no-use-before-define: 0 */
+
+"use strict";
+
+const acorn = require("acorn");
+const jsx = require("acorn-jsx");
+const astNodeTypes = require("./lib/ast-node-types");
+const espree = require("./lib/espree");
+const { getLatestEcmaVersion, getSupportedEcmaVersions } = require("./lib/options");
+
+// To initialize lazily.
+const parsers = {
+ _regular: null,
+ _jsx: null,
+
+ get regular() {
+ if (this._regular === null) {
+ this._regular = acorn.Parser.extend(espree());
+ }
+ return this._regular;
+ },
+
+ get jsx() {
+ if (this._jsx === null) {
+ this._jsx = acorn.Parser.extend(jsx(), espree());
+ }
+ return this._jsx;
+ },
+
+ get(options) {
+ const useJsx = Boolean(
+ options &&
+ options.ecmaFeatures &&
+ options.ecmaFeatures.jsx
+ );
+
+ return useJsx ? this.jsx : this.regular;
+ }
+};
+
+//------------------------------------------------------------------------------
+// Tokenizer
+//------------------------------------------------------------------------------
+
+/**
+ * Tokenizes the given code.
+ * @param {string} code The code to tokenize.
+ * @param {Object} options Options defining how to tokenize.
+ * @returns {Token[]} An array of tokens.
+ * @throws {SyntaxError} If the input code is invalid.
+ * @private
+ */
+function tokenize(code, options) {
+ const Parser = parsers.get(options);
+
+ // Ensure to collect tokens.
+ if (!options || options.tokens !== true) {
+ options = Object.assign({}, options, { tokens: true }); // eslint-disable-line no-param-reassign
+ }
+
+ return new Parser(options, code).tokenize();
+}
+
+//------------------------------------------------------------------------------
+// Parser
+//------------------------------------------------------------------------------
+
+/**
+ * Parses the given code.
+ * @param {string} code The code to tokenize.
+ * @param {Object} options Options defining how to tokenize.
+ * @returns {ASTNode} The "Program" AST node.
+ * @throws {SyntaxError} If the input code is invalid.
+ */
+function parse(code, options) {
+ const Parser = parsers.get(options);
+
+ return new Parser(options, code).parse();
+}
+
+//------------------------------------------------------------------------------
+// Public
+//------------------------------------------------------------------------------
+
+exports.version = require("./package.json").version;
+
+exports.tokenize = tokenize;
+
+exports.parse = parse;
+
+// Deep copy.
+/* istanbul ignore next */
+exports.Syntax = (function() {
+ let name,
+ types = {};
+
+ if (typeof Object.create === "function") {
+ types = Object.create(null);
+ }
+
+ for (name in astNodeTypes) {
+ if (Object.hasOwnProperty.call(astNodeTypes, name)) {
+ types[name] = astNodeTypes[name];
+ }
+ }
+
+ if (typeof Object.freeze === "function") {
+ Object.freeze(types);
+ }
+
+ return types;
+}());
+
+/* istanbul ignore next */
+exports.VisitorKeys = (function() {
+ return require("eslint-visitor-keys").KEYS;
+}());
+
+exports.latestEcmaVersion = getLatestEcmaVersion();
+
+exports.supportedEcmaVersions = getSupportedEcmaVersions();
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