DefinePropertyGettersRuntimeModule.js
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DefinePropertyGettersRuntimeModule.js
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			/*
			MIT License http://www.opensource.org/licenses/mit-license.php
			*/

			"use strict";

			const RuntimeGlobals = require("../RuntimeGlobals");
			const Template = require("../Template");
			const HelperRuntimeModule = require("./HelperRuntimeModule");

			class DefinePropertyGettersRuntimeModule extends HelperRuntimeModule {
			constructor() {
			super("define property getters");
			}

			/**
			* @returns {string} runtime code
			*/
			generate() {
			const { runtimeTemplate } = this.compilation;
			const fn = RuntimeGlobals.definePropertyGetters;
			return Template.asString([
			"// define getter functions for harmony exports",
			`${fn} = ${runtimeTemplate.basicFunction("exports, definition", [
			`for(var key in definition) {`,
			Template.indent([
			`if(${RuntimeGlobals.hasOwnProperty}(definition, key) && !${RuntimeGlobals.hasOwnProperty}(exports, key)) {`,
			Template.indent([
			"Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });"
			]),
			"}"
			]),
			"}"
			])};`
			]);
			}
			}

			module.exports = DefinePropertyGettersRuntimeModule;