96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
/*
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* Copyright (C) 2012-2014 by various contributors (see AUTHORS)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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import { reservedWords } from "../util/identifier";
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import { getOptions } from "../options";
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import Tokenizer from "../tokenizer";
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export const plugins = {};
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export default class Parser extends Tokenizer {
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constructor(options, input) {
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options = getOptions(options);
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super(options, input);
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this.options = options;
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this.inModule = this.options.sourceType === "module";
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this.input = input;
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this.plugins = this.loadPlugins(this.options.plugins);
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this.filename = options.sourceFilename;
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// If enabled, skip leading hashbang line.
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if (this.state.pos === 0 && this.input[0] === "#" && this.input[1] === "!") {
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this.skipLineComment(2);
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}
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}
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isReservedWord(word) {
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if (word === "await") {
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return this.inModule;
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} else {
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return reservedWords[6](word);
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}
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}
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hasPlugin(name) {
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return !!this.plugins[name];
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}
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extend(name, f) {
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this[name] = f(this[name]);
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}
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loadPlugins(pluginList) {
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const pluginMap = {};
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if (pluginList.indexOf("flow") >= 0) {
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// ensure flow plugin loads last
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pluginList = pluginList.filter((plugin) => plugin !== "flow");
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pluginList.push("flow");
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}
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if (pluginList.indexOf("estree") >= 0) {
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// ensure estree plugin loads first
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pluginList = pluginList.filter((plugin) => plugin !== "estree");
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pluginList.unshift("estree");
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}
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for (const name of pluginList) {
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if (!pluginMap[name]) {
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pluginMap[name] = true;
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const plugin = plugins[name];
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if (plugin) plugin(this);
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}
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}
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return pluginMap;
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}
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parse() {
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const file = this.startNode();
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const program = this.startNode();
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this.nextToken();
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return this.parseTopLevel(file, program);
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}
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}
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