'use strict';
var call = require('../internals/function-call');
var hasOwn = require('../internals/has-own-property');
var isPrototypeOf = require('../internals/object-is-prototype-of');
var regExpFlagsDetection = require('../internals/regexp-flags-detection');
var regExpFlagsGetterImplementation = require('../internals/regexp-flags');

var RegExpPrototype = RegExp.prototype;

module.exports = regExpFlagsDetection.correct ? function (it) {
  return it.flags;
} : function (it) {
  return (!regExpFlagsDetection.correct && isPrototypeOf(RegExpPrototype, it) && !hasOwn(it, 'flags'))
    ? call(regExpFlagsGetterImplementation, it)
    : it.flags;
};