create-expo-cljs-app/template/node_modules/metro-runtime/src/polyfills/require.js.flow

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/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @polyfill
 * @flow
 * @format
 */

'use strict';

/* eslint-disable no-bitwise */

declare var __DEV__: boolean;
declare var __METRO_GLOBAL_PREFIX__: string;

type DependencyMap = Array<ModuleID>;
type Exports = any;
type FactoryFn = (
  global: Object,
  require: RequireFn,
  metroImportDefault: RequireFn,
  metroImportAll: RequireFn,
  moduleObject: {exports: {...}, ...},
  exports: {...},
  dependencyMap: ?DependencyMap,
) => void;
type HotModuleReloadingCallback = () => void;
type HotModuleReloadingData = {|
  _acceptCallback: ?HotModuleReloadingCallback,
  _disposeCallback: ?HotModuleReloadingCallback,
  _didAccept: boolean,
  accept: (callback?: HotModuleReloadingCallback) => void,
  dispose: (callback?: HotModuleReloadingCallback) => void,
|};
type ModuleID = number;
type Module = {
  id?: ModuleID,
  exports: Exports,
  hot?: HotModuleReloadingData,
  ...
};
type ModuleDefinition = {|
  dependencyMap: ?DependencyMap,
  error?: any,
  factory: FactoryFn,
  hasError: boolean,
  hot?: HotModuleReloadingData,
  importedAll: any,
  importedDefault: any,
  isInitialized: boolean,
  path?: string,
  publicModule: Module,
  verboseName?: string,
|};
type ModuleList = {
  [number]: ?ModuleDefinition,
  __proto__: null,
  ...
};
type RequireFn = (id: ModuleID | VerboseModuleNameForDev) => Exports;
type VerboseModuleNameForDev = string;
type ModuleDefiner = (moduleId: ModuleID) => void;

global.__r = metroRequire;
global[`${__METRO_GLOBAL_PREFIX__}__d`] = define;
global.__c = clear;
global.__registerSegment = registerSegment;

var modules = clear();

// Don't use a Symbol here, it would pull in an extra polyfill with all sorts of
// additional stuff (e.g. Array.from).
const EMPTY = {};
const {hasOwnProperty} = {};

if (__DEV__) {
  global.$RefreshReg$ = () => {};
  global.$RefreshSig$ = () => type => type;
}

function clear(): ModuleList {
  modules = (Object.create(null): ModuleList);

  // We return modules here so that we can assign an initial value to modules
  // when defining it. Otherwise, we would have to do "let modules = null",
  // which will force us to add "nullthrows" everywhere.
  return modules;
}

if (__DEV__) {
  var verboseNamesToModuleIds: {
    [key: string]: number,
    __proto__: null,
    ...
  } = Object.create(null);
  var initializingModuleIds: Array<number> = [];
}

function define(
  factory: FactoryFn,
  moduleId: number,
  dependencyMap?: DependencyMap,
): void {
  if (modules[moduleId] != null) {
    if (__DEV__) {
      // (We take `inverseDependencies` from `arguments` to avoid an unused
      // named parameter in `define` in production.
      const inverseDependencies = arguments[4];

      // If the module has already been defined and the define method has been
      // called with inverseDependencies, we can hot reload it.
      if (inverseDependencies) {
        global.__accept(moduleId, factory, dependencyMap, inverseDependencies);
      }
    }

    // prevent repeated calls to `global.nativeRequire` to overwrite modules
    // that are already loaded
    return;
  }

  const mod: ModuleDefinition = {
    dependencyMap,
    factory,
    hasError: false,
    importedAll: EMPTY,
    importedDefault: EMPTY,
    isInitialized: false,
    publicModule: {exports: {}},
  };

  modules[moduleId] = mod;

  if (__DEV__) {
    // HMR
    mod.hot = createHotReloadingObject();

    // DEBUGGABLE MODULES NAMES
    // we take `verboseName` from `arguments` to avoid an unused named parameter
    // in `define` in production.
    const verboseName: string | void = arguments[3];
    if (verboseName) {
      mod.verboseName = verboseName;
      verboseNamesToModuleIds[verboseName] = moduleId;
    }
  }
}

function metroRequire(moduleId: ModuleID | VerboseModuleNameForDev): Exports {
  if (__DEV__ && typeof moduleId === 'string') {
    const verboseName = moduleId;
    moduleId = verboseNamesToModuleIds[verboseName];
    if (moduleId == null) {
      throw new Error(`Unknown named module: "${verboseName}"`);
    } else {
      console.warn(
        `Requiring module "${verboseName}" by name is only supported for ` +
          'debugging purposes and will BREAK IN PRODUCTION!',
      );
    }
  }

  //$FlowFixMe: at this point we know that moduleId is a number
  const moduleIdReallyIsNumber: number = moduleId;

  if (__DEV__) {
    const initializingIndex = initializingModuleIds.indexOf(
      moduleIdReallyIsNumber,
    );
    if (initializingIndex !== -1) {
      const cycle = initializingModuleIds
        .slice(initializingIndex)
        .map((id: number) =>
          modules[id] ? modules[id].verboseName : '[unknown]',
        );
      // We want to show A -> B -> A:
      cycle.push(cycle[0]);
      console.warn(
        `Require cycle: ${cycle.join(' -> ')}\n\n` +
          'Require cycles are allowed, but can result in uninitialized values. ' +
          'Consider refactoring to remove the need for a cycle.',
      );
    }
  }

  const module = modules[moduleIdReallyIsNumber];

  return module && module.isInitialized
    ? module.publicModule.exports
    : guardedLoadModule(moduleIdReallyIsNumber, module);
}

function metroImportDefault(moduleId: ModuleID | VerboseModuleNameForDev) {
  if (__DEV__ && typeof moduleId === 'string') {
    const verboseName = moduleId;
    moduleId = verboseNamesToModuleIds[verboseName];
  }

  //$FlowFixMe: at this point we know that moduleId is a number
  const moduleIdReallyIsNumber: number = moduleId;

  if (
    modules[moduleIdReallyIsNumber] &&
    modules[moduleIdReallyIsNumber].importedDefault !== EMPTY
  ) {
    return modules[moduleIdReallyIsNumber].importedDefault;
  }

  const exports = metroRequire(moduleIdReallyIsNumber);
  const importedDefault =
    exports && exports.__esModule ? exports.default : exports;

  // $FlowFixMe The metroRequire call above will throw if modules[id] is null
  return (modules[moduleIdReallyIsNumber].importedDefault = importedDefault);
}
metroRequire.importDefault = metroImportDefault;

function metroImportAll(moduleId: ModuleID | VerboseModuleNameForDev | number) {
  if (__DEV__ && typeof moduleId === 'string') {
    const verboseName = moduleId;
    moduleId = verboseNamesToModuleIds[verboseName];
  }

  //$FlowFixMe: at this point we know that moduleId is a number
  const moduleIdReallyIsNumber: number = moduleId;

  if (
    modules[moduleIdReallyIsNumber] &&
    modules[moduleIdReallyIsNumber].importedAll !== EMPTY
  ) {
    return modules[moduleIdReallyIsNumber].importedAll;
  }

  const exports = metroRequire(moduleIdReallyIsNumber);
  let importedAll;

  if (exports && exports.__esModule) {
    importedAll = exports;
  } else {
    importedAll = {};

    // Refrain from using Object.assign, it has to work in ES3 environments.
    if (exports) {
      for (const key in exports) {
        if (hasOwnProperty.call(exports, key)) {
          importedAll[key] = exports[key];
        }
      }
    }

    importedAll.default = exports;
  }

  // $FlowFixMe The metroRequire call above will throw if modules[id] is null
  return (modules[moduleIdReallyIsNumber].importedAll = importedAll);
}
metroRequire.importAll = metroImportAll;

let inGuard = false;
function guardedLoadModule(
  moduleId: ModuleID,
  module: ?ModuleDefinition,
): Exports {
  if (!inGuard && global.ErrorUtils) {
    inGuard = true;
    let returnValue;
    try {
      returnValue = loadModuleImplementation(moduleId, module);
    } catch (e) {
      // TODO: (moti) T48204692 Type this use of ErrorUtils.
      global.ErrorUtils.reportFatalError(e);
    }
    inGuard = false;
    return returnValue;
  } else {
    return loadModuleImplementation(moduleId, module);
  }
}

const ID_MASK_SHIFT = 16;
const LOCAL_ID_MASK = ~0 >>> ID_MASK_SHIFT;

function unpackModuleId(
  moduleId: ModuleID,
): {
  localId: number,
  segmentId: number,
  ...
} {
  const segmentId = moduleId >>> ID_MASK_SHIFT;
  const localId = moduleId & LOCAL_ID_MASK;
  return {segmentId, localId};
}
metroRequire.unpackModuleId = unpackModuleId;

function packModuleId(value: {
  localId: number,
  segmentId: number,
  ...
}): ModuleID {
  return (value.segmentId << ID_MASK_SHIFT) + value.localId;
}
metroRequire.packModuleId = packModuleId;

const moduleDefinersBySegmentID: Array<?ModuleDefiner> = [];
const definingSegmentByModuleID: Map<ModuleID, number> = new Map();

function registerSegment(
  segmentId: number,
  moduleDefiner: ModuleDefiner,
  moduleIds: ?$ReadOnlyArray<ModuleID>,
): void {
  moduleDefinersBySegmentID[segmentId] = moduleDefiner;
  if (__DEV__) {
    if (segmentId === 0 && moduleIds) {
      throw new Error(
        'registerSegment: Expected moduleIds to be null for main segment',
      );
    }
    if (segmentId !== 0 && !moduleIds) {
      throw new Error(
        'registerSegment: Expected moduleIds to be passed for segment #' +
          segmentId,
      );
    }
  }
  if (moduleIds) {
    moduleIds.forEach(moduleId => {
      if (!modules[moduleId] && !definingSegmentByModuleID.has(moduleId)) {
        definingSegmentByModuleID.set(moduleId, segmentId);
      }
    });
  }
}

function loadModuleImplementation(
  moduleId: ModuleID,
  module: ?ModuleDefinition,
): Exports {
  if (!module && moduleDefinersBySegmentID.length > 0) {
    const segmentId = definingSegmentByModuleID.get(moduleId) ?? 0;
    const definer = moduleDefinersBySegmentID[segmentId];
    if (definer != null) {
      definer(moduleId);
      module = modules[moduleId];
      definingSegmentByModuleID.delete(moduleId);
    }
  }

  const nativeRequire = global.nativeRequire;
  if (!module && nativeRequire) {
    const {segmentId, localId} = unpackModuleId(moduleId);
    nativeRequire(localId, segmentId);
    module = modules[moduleId];
  }

  if (!module) {
    throw unknownModuleError(moduleId);
  }

  if (module.hasError) {
    throw moduleThrewError(moduleId, module.error);
  }

  // `metroRequire` calls into the require polyfill itself are not analyzed and
  // replaced so that they use numeric module IDs.
  // The systrace module will expose itself on the metroRequire function so that
  // it can be used here.
  // TODO(t9759686) Scan polyfills for dependencies, too
  if (__DEV__) {
    var {Systrace, Refresh} = metroRequire;
  }

  // We must optimistically mark module as initialized before running the
  // factory to keep any require cycles inside the factory from causing an
  // infinite require loop.
  module.isInitialized = true;

  const {factory, dependencyMap} = module;
  if (__DEV__) {
    initializingModuleIds.push(moduleId);
  }
  try {
    if (__DEV__) {
      // $FlowFixMe: we know that __DEV__ is const and `Systrace` exists
      Systrace.beginEvent('JS_require_' + (module.verboseName || moduleId));
    }

    const moduleObject: Module = module.publicModule;

    if (__DEV__) {
      moduleObject.hot = module.hot;

      var prevRefreshReg = global.$RefreshReg$;
      var prevRefreshSig = global.$RefreshSig$;
      if (Refresh != null) {
        const RefreshRuntime = Refresh;
        global.$RefreshReg$ = (type, id) => {
          RefreshRuntime.register(type, moduleId + ' ' + id);
        };
        global.$RefreshSig$ =
          RefreshRuntime.createSignatureFunctionForTransform;
      }
    }
    moduleObject.id = moduleId;

    // keep args in sync with with defineModuleCode in
    // metro/src/Resolver/index.js
    // and metro/src/ModuleGraph/worker.js
    factory(
      global,
      metroRequire,
      metroImportDefault,
      metroImportAll,
      moduleObject,
      moduleObject.exports,
      dependencyMap,
    );

    // avoid removing factory in DEV mode as it breaks HMR
    if (!__DEV__) {
      // $FlowFixMe: This is only sound because we never access `factory` again
      module.factory = undefined;
      module.dependencyMap = undefined;
    }

    if (__DEV__) {
      // $FlowFixMe: we know that __DEV__ is const and `Systrace` exists
      Systrace.endEvent();

      if (Refresh != null) {
        registerExportsForReactRefresh(Refresh, moduleObject.exports, moduleId);
      }
    }

    return moduleObject.exports;
  } catch (e) {
    module.hasError = true;
    module.error = e;
    module.isInitialized = false;
    module.publicModule.exports = undefined;
    throw e;
  } finally {
    if (__DEV__) {
      if (initializingModuleIds.pop() !== moduleId) {
        throw new Error(
          'initializingModuleIds is corrupt; something is terribly wrong',
        );
      }
      global.$RefreshReg$ = prevRefreshReg;
      global.$RefreshSig$ = prevRefreshSig;
    }
  }
}

function unknownModuleError(id: ModuleID): Error {
  let message = 'Requiring unknown module "' + id + '".';
  if (__DEV__) {
    message +=
      ' If you are sure the module exists, try restarting Metro. ' +
      'You may also want to run `yarn` or `npm install`.';
  }
  return Error(message);
}

function moduleThrewError(id: ModuleID, error: any): Error {
  const displayName = (__DEV__ && modules[id] && modules[id].verboseName) || id;
  return Error(
    'Requiring module "' +
      displayName +
      '", which threw an exception: ' +
      error,
  );
}

if (__DEV__) {
  metroRequire.Systrace = {
    beginEvent: (): void => {},
    endEvent: (): void => {},
  };

  metroRequire.getModules = (): ModuleList => {
    return modules;
  };

  // HOT MODULE RELOADING
  var createHotReloadingObject = function() {
    const hot: HotModuleReloadingData = {
      _acceptCallback: null,
      _disposeCallback: null,
      _didAccept: false,
      accept: (callback?: HotModuleReloadingCallback): void => {
        hot._didAccept = true;
        hot._acceptCallback = callback;
      },
      dispose: (callback?: HotModuleReloadingCallback): void => {
        hot._disposeCallback = callback;
      },
    };
    return hot;
  };

  let reactRefreshTimeout = null;

  const metroHotUpdateModule = function(
    id: ModuleID,
    factory: FactoryFn,
    dependencyMap: DependencyMap,
    inverseDependencies: {[key: ModuleID]: Array<ModuleID>, ...},
  ) {
    const mod = modules[id];
    if (!mod) {
      if (factory) {
        // New modules are going to be handled by the define() method.
        return;
      }
      throw unknownModuleError(id);
    }

    if (!mod.hasError && !mod.isInitialized) {
      // The module hasn't actually been executed yet,
      // so we can always safely replace it.
      mod.factory = factory;
      mod.dependencyMap = dependencyMap;
      return;
    }

    const {Refresh} = metroRequire;
    const refreshBoundaryIDs = new Set();

    // In this loop, we will traverse the dependency tree upwards from the
    // changed module. Updates "bubble" up to the closest accepted parent.
    //
    // If we reach the module root and nothing along the way accepted the update,
    // we know hot reload is going to fail. In that case we return false.
    //
    // The main purpose of this loop is to figure out whether it's safe to apply
    // a hot update. It is only safe when the update was accepted somewhere
    // along the way upwards for each of its parent dependency module chains.
    //
    // We perform a topological sort because we may discover the same
    // module more than once in the list of things to re-execute, and
    // we want to execute modules before modules that depend on them.
    //
    // If we didn't have this check, we'd risk re-evaluating modules that
    // have side effects and lead to confusing and meaningless crashes.

    let didBailOut = false;
    const updatedModuleIDs = topologicalSort(
      [id], // Start with the changed module and go upwards
      pendingID => {
        const pendingModule = modules[pendingID];
        if (pendingModule == null) {
          // Nothing to do.
          return [];
        }
        const pendingHot = pendingModule.hot;
        if (pendingHot == null) {
          throw new Error(
            '[Refresh] Expected module.hot to always exist in DEV.',
          );
        }
        // A module can be accepted manually from within itself.
        let canAccept = pendingHot._didAccept;
        if (!canAccept && Refresh != null) {
          // Or React Refresh may mark it accepted based on exports.
          const isBoundary = isReactRefreshBoundary(
            Refresh,
            pendingModule.publicModule.exports,
          );
          if (isBoundary) {
            canAccept = true;
            refreshBoundaryIDs.add(pendingID);
          }
        }
        if (canAccept) {
          // Don't look at parents.
          return [];
        }
        // If we bubble through the roof, there is no way to do a hot update.
        // Bail out altogether. This is the failure case.
        const parentIDs = inverseDependencies[pendingID];
        if (parentIDs.length === 0) {
          // Reload the app because the hot reload can't succeed.
          // This should work both on web and React Native.
          performFullRefresh('No root boundary', {
            source: mod,
            failed: pendingModule,
          });
          didBailOut = true;
          return [];
        }
        // This module can't handle the update but maybe all its parents can?
        // Put them all in the queue to run the same set of checks.
        return parentIDs;
      },
      () => didBailOut, // Should we stop?
    ).reverse();

    if (didBailOut) {
      return;
    }

    // If we reached here, it is likely that hot reload will be successful.
    // Run the actual factories.
    const seenModuleIDs = new Set();
    for (let i = 0; i < updatedModuleIDs.length; i++) {
      // Don't process twice if we have a cycle.
      const updatedID = updatedModuleIDs[i];
      if (seenModuleIDs.has(updatedID)) {
        continue;
      }
      seenModuleIDs.add(updatedID);

      const updatedMod = modules[updatedID];
      if (updatedMod == null) {
        throw new Error('[Refresh] Expected to find the updated module.');
      }
      const prevExports = updatedMod.publicModule.exports;
      const didError = runUpdatedModule(
        updatedID,
        updatedID === id ? factory : undefined,
        updatedID === id ? dependencyMap : undefined,
      );
      const nextExports = updatedMod.publicModule.exports;

      if (didError) {
        // The user was shown a redbox about module initialization.
        // There's nothing for us to do here until it's fixed.
        return;
      }

      if (refreshBoundaryIDs.has(updatedID)) {
        // Since we just executed the code for it, it's possible
        // that the new exports make it ineligible for being a boundary.
        const isNoLongerABoundary = !isReactRefreshBoundary(
          Refresh,
          nextExports,
        );
        // It can also become ineligible if its exports are incompatible
        // with the previous exports.
        // For example, if you add/remove/change exports, we'll want
        // to re-execute the importing modules, and force those components
        // to re-render. Similarly, if you convert a class component
        // to a function, we want to invalidate the boundary.
        const didInvalidate = shouldInvalidateReactRefreshBoundary(
          Refresh,
          prevExports,
          nextExports,
        );
        if (isNoLongerABoundary || didInvalidate) {
          // We'll be conservative. The only case in which we won't do a full
          // reload is if all parent modules are also refresh boundaries.
          // In that case we'll add them to the current queue.
          const parentIDs = inverseDependencies[updatedID];
          if (parentIDs.length === 0) {
            // Looks like we bubbled to the root. Can't recover from that.
            performFullRefresh(
              isNoLongerABoundary
                ? 'No longer a boundary'
                : 'Invalidated boundary',
              {
                source: mod,
                failed: updatedMod,
              },
            );
            return;
          }
          // Schedule all parent refresh boundaries to re-run in this loop.
          for (let j = 0; j < parentIDs.length; j++) {
            const parentID = parentIDs[j];
            const parentMod = modules[parentID];
            if (parentMod == null) {
              throw new Error('[Refresh] Expected to find parent module.');
            }
            const canAcceptParent = isReactRefreshBoundary(
              Refresh,
              parentMod.publicModule.exports,
            );
            if (canAcceptParent) {
              // All parents will have to re-run too.
              refreshBoundaryIDs.add(parentID);
              updatedModuleIDs.push(parentID);
            } else {
              performFullRefresh('Invalidated boundary', {
                source: mod,
                failed: parentMod,
              });
              return;
            }
          }
        }
      }
    }

    if (Refresh != null) {
      // Debounce a little in case there are multiple updates queued up.
      // This is also useful because __accept may be called multiple times.
      if (reactRefreshTimeout == null) {
        reactRefreshTimeout = setTimeout(() => {
          reactRefreshTimeout = null;
          // Update React components.
          Refresh.performReactRefresh();
        }, 30);
      }
    }
  };

  const topologicalSort = function<T>(
    roots: Array<T>,
    getEdges: T => Array<T>,
    earlyStop: T => boolean,
  ): Array<T> {
    const result = [];
    const visited = new Set();
    function traverseDependentNodes(node: T) {
      visited.add(node);
      const dependentNodes = getEdges(node);
      if (earlyStop(node)) {
        return;
      }
      dependentNodes.forEach(dependent => {
        if (visited.has(dependent)) {
          return;
        }
        traverseDependentNodes(dependent);
      });
      result.push(node);
    }
    roots.forEach(root => {
      if (!visited.has(root)) {
        traverseDependentNodes(root);
      }
    });
    return result;
  };

  const runUpdatedModule = function(
    id: ModuleID,
    factory?: FactoryFn,
    dependencyMap?: DependencyMap,
  ): boolean {
    const mod = modules[id];
    if (mod == null) {
      throw new Error('[Refresh] Expected to find the module.');
    }

    const {hot} = mod;
    if (!hot) {
      throw new Error('[Refresh] Expected module.hot to always exist in DEV.');
    }

    if (hot._disposeCallback) {
      try {
        hot._disposeCallback();
      } catch (error) {
        console.error(
          `Error while calling dispose handler for module ${id}: `,
          error,
        );
      }
    }

    if (factory) {
      mod.factory = factory;
    }
    if (dependencyMap) {
      mod.dependencyMap = dependencyMap;
    }
    mod.hasError = false;
    mod.error = undefined;
    mod.importedAll = EMPTY;
    mod.importedDefault = EMPTY;
    mod.isInitialized = false;
    const prevExports = mod.publicModule.exports;
    mod.publicModule.exports = {};
    hot._didAccept = false;
    hot._acceptCallback = null;
    hot._disposeCallback = null;
    metroRequire(id);

    if (mod.hasError) {
      // This error has already been reported via a redbox.
      // We know it's likely a typo or some mistake that was just introduced.
      // Our goal now is to keep the rest of the application working so that by
      // the time user fixes the error, the app isn't completely destroyed
      // underneath the redbox. So we'll revert the module object to the last
      // successful export and stop propagating this update.
      mod.hasError = false;
      mod.isInitialized = true;
      mod.error = null;
      mod.publicModule.exports = prevExports;
      // We errored. Stop the update.
      return true;
    }

    if (hot._acceptCallback) {
      try {
        hot._acceptCallback();
      } catch (error) {
        console.error(
          `Error while calling accept handler for module ${id}: `,
          error,
        );
      }
    }
    // No error.
    return false;
  };

  const performFullRefresh = (
    reason: string,
    modules: $ReadOnly<{source: ModuleDefinition, failed: ModuleDefinition}>,
  ) => {
    /* global window */
    if (
      typeof window !== 'undefined' &&
      window.location != null &&
      typeof window.location.reload === 'function'
    ) {
      window.location.reload();
    } else {
      // This is attached in setUpDeveloperTools.
      const {Refresh} = metroRequire;
      if (Refresh != null) {
        const sourceName = modules.source?.verboseName ?? 'unknown';
        const failedName = modules.failed?.verboseName ?? 'unknown';
        Refresh.performFullRefresh(
          `Fast Refresh - ${reason} <${sourceName}> <${failedName}>`,
        );
      } else {
        console.warn('Could not reload the application after an edit.');
      }
    }
  };

  // Modules that only export components become React Refresh boundaries.
  var isReactRefreshBoundary = function(Refresh, moduleExports): boolean {
    if (Refresh.isLikelyComponentType(moduleExports)) {
      return true;
    }
    if (moduleExports == null || typeof moduleExports !== 'object') {
      // Exit if we can't iterate over exports.
      return false;
    }
    let hasExports = false;
    let areAllExportsComponents = true;
    for (const key in moduleExports) {
      hasExports = true;
      if (key === '__esModule') {
        continue;
      }
      const desc = Object.getOwnPropertyDescriptor(moduleExports, key);
      if (desc && desc.get) {
        // Don't invoke getters as they may have side effects.
        return false;
      }
      const exportValue = moduleExports[key];
      if (!Refresh.isLikelyComponentType(exportValue)) {
        areAllExportsComponents = false;
      }
    }
    return hasExports && areAllExportsComponents;
  };

  var shouldInvalidateReactRefreshBoundary = (
    Refresh,
    prevExports,
    nextExports,
  ) => {
    const prevSignature = getRefreshBoundarySignature(Refresh, prevExports);
    const nextSignature = getRefreshBoundarySignature(Refresh, nextExports);
    if (prevSignature.length !== nextSignature.length) {
      return true;
    }
    for (let i = 0; i < nextSignature.length; i++) {
      if (prevSignature[i] !== nextSignature[i]) {
        return true;
      }
    }
    return false;
  };

  // When this signature changes, it's unsafe to stop at this refresh boundary.
  var getRefreshBoundarySignature = (Refresh, moduleExports): Array<mixed> => {
    const signature = [];
    signature.push(Refresh.getFamilyByType(moduleExports));
    if (moduleExports == null || typeof moduleExports !== 'object') {
      // Exit if we can't iterate over exports.
      // (This is important for legacy environments.)
      return signature;
    }
    for (const key in moduleExports) {
      if (key === '__esModule') {
        continue;
      }
      const desc = Object.getOwnPropertyDescriptor(moduleExports, key);
      if (desc && desc.get) {
        continue;
      }
      const exportValue = moduleExports[key];
      signature.push(key);
      signature.push(Refresh.getFamilyByType(exportValue));
    }
    return signature;
  };

  var registerExportsForReactRefresh = (Refresh, moduleExports, moduleID) => {
    Refresh.register(moduleExports, moduleID + ' %exports%');
    if (moduleExports == null || typeof moduleExports !== 'object') {
      // Exit if we can't iterate over exports.
      // (This is important for legacy environments.)
      return;
    }
    for (const key in moduleExports) {
      const desc = Object.getOwnPropertyDescriptor(moduleExports, key);
      if (desc && desc.get) {
        // Don't invoke getters as they may have side effects.
        continue;
      }
      const exportValue = moduleExports[key];
      const typeID = moduleID + ' %exports% ' + key;
      Refresh.register(exportValue, typeID);
    }
  };

  global.__accept = metroHotUpdateModule;
}