HarmonyTopLevelThisParserPlugin.js
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	/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Florent Cailhol @ooflorent
	*/

	"use strict";

	const ConstDependency = require("./ConstDependency");
	const HarmonyExports = require("./HarmonyExports");

	class HarmonyTopLevelThisParserPlugin {
	apply(parser) {
	parser.hooks.expression
	.for("this")
	.tap("HarmonyTopLevelThisParserPlugin", node => {
	if (!parser.scope.topLevelScope) return;
	if (HarmonyExports.isEnabled(parser.state)) {
	const dep = new ConstDependency("undefined", node.range, null);
	dep.loc = node.loc;
	parser.state.module.addPresentationalDependency(dep);
	return this;
	}
	});
	}
	}

	module.exports = HarmonyTopLevelThisParserPlugin;