Ви не можете вибрати більше 25 тем
Теми мають розпочинатися з літери або цифри, можуть містити дефіси (-) і не повинні перевищувати 35 символів.
177 рядки
6.3 KiB
177 рядки
6.3 KiB
/**
|
|
* @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();
|