80 lines
1.9 KiB
JavaScript
80 lines
1.9 KiB
JavaScript
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: Object, input: string) {
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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: string): boolean {
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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: string): boolean {
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return !!this.plugins[name];
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}
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extend(name: string, f: Function) {
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this[name] = f(this[name]);
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}
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loadPlugins(pluginList: Array<string>): { [key: string]: boolean } {
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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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type: "File",
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program: {
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type: "Program",
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body: Array<Object>
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}
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} {
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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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