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