'use strict';
+var uncurryThis = require('../internals/function-uncurry-this');
+var PROPER_FUNCTION_NAME = require('../internals/function-name').PROPER;
var redefine = require('../internals/redefine');
var anObject = require('../internals/an-object');
+var isPrototypeOf = require('../internals/object-is-prototype-of');
+var $toString = require('../internals/to-string');
var fails = require('../internals/fails');
-var flags = require('../internals/regexp-flags');
+var regExpFlags = require('../internals/regexp-flags');
var TO_STRING = 'toString';
var RegExpPrototype = RegExp.prototype;
-var nativeToString = RegExpPrototype[TO_STRING];
+var n$ToString = RegExpPrototype[TO_STRING];
+var getFlags = uncurryThis(regExpFlags);
-var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+var NOT_GENERIC = fails(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
// FF44- RegExp#toString has a wrong name
-var INCORRECT_NAME = nativeToString.name != TO_STRING;
+var INCORRECT_NAME = PROPER_FUNCTION_NAME && n$ToString.name != TO_STRING;
// `RegExp.prototype.toString` method
// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
if (NOT_GENERIC || INCORRECT_NAME) {
redefine(RegExp.prototype, TO_STRING, function toString() {
var R = anObject(this);
- var p = String(R.source);
+ var p = $toString(R.source);
var rf = R.flags;
- var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);
+ var f = $toString(rf === undefined && isPrototypeOf(RegExpPrototype, R) && !('flags' in RegExpPrototype) ? getFlags(R) : rf);
return '/' + p + '/' + f;
}, { unsafe: true });
}