source: imaps-frontend/node_modules/regexp.prototype.flags/polyfill.js

'use strict';

var implementation = require('./implementation');

var supportsDescriptors = require('define-properties').supportsDescriptors;
var $gOPD = Object.getOwnPropertyDescriptor;

module.exports = function getPolyfill() {
        if (supportsDescriptors && (/a/mig).flags === 'gim') {
                var descriptor = $gOPD(RegExp.prototype, 'flags');
                if (
                        descriptor
                        && typeof descriptor.get === 'function'
                        && typeof RegExp.prototype.dotAll === 'boolean'
                        && typeof RegExp.prototype.hasIndices === 'boolean'
                ) {
                        /* eslint getter-return: 0 */
                        var calls = '';
                        var o = {};
                        Object.defineProperty(o, 'hasIndices', {
                                get: function () {
                                        calls += 'd';
                                }
                        });
                        Object.defineProperty(o, 'sticky', {
                                get: function () {
                                        calls += 'y';
                                }
                        });
                        if (calls === 'dy') {
                                return descriptor.get;
                        }
                }
        }
        return implementation;
};