source: frontend/node_modules/webpack/lib/dependencies/HarmonyExports.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

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

/** @typedef {import("../Module").BuildInfo} BuildInfo */
/** @typedef {import("../Module").BuildMeta} BuildMeta */
/** @typedef {import("../javascript/JavascriptParser").JavascriptParserState} JavascriptParserState */

/** @type {WeakMap<JavascriptParserState, boolean>} */
const parserStateExportsState = new WeakMap();

/**
 * Processes the provided parser state.
 * @param {JavascriptParserState} parserState parser state
 * @param {boolean} isStrictHarmony strict harmony mode should be enabled
 * @returns {void}
 */
module.exports.enable = (parserState, isStrictHarmony) => {
        const value = parserStateExportsState.get(parserState);
        if (value === false) return;
        parserStateExportsState.set(parserState, true);
        if (value !== true) {
                const buildMeta = /** @type {BuildMeta} */ (parserState.module.buildMeta);
                buildMeta.exportsType = "namespace";
                const buildInfo = /** @type {BuildInfo} */ (parserState.module.buildInfo);
                buildInfo.strict = true;
                buildInfo.exportsArgument = RuntimeGlobals.exports;
                if (isStrictHarmony) {
                        buildMeta.strictHarmonyModule = true;
                        buildInfo.moduleArgument = "__webpack_module__";
                }
        }
};

/**
 * Returns true, when enabled.
 * @param {JavascriptParserState} parserState parser state
 * @returns {boolean} true, when enabled
 */
module.exports.isEnabled = (parserState) => {
        const value = parserStateExportsState.get(parserState);
        return value === true;
};