--- /dev/null
+'use strict';
+var hide = require('./_hide')
+ , redefine = require('./_redefine')
+ , fails = require('./_fails')
+ , defined = require('./_defined')
+ , wks = require('./_wks');
+
+module.exports = function(KEY, length, exec){
+ var SYMBOL = wks(KEY)
+ , fns = exec(defined, SYMBOL, ''[KEY])
+ , strfn = fns[0]
+ , rxfn = fns[1];
+ if(fails(function(){
+ var O = {};
+ O[SYMBOL] = function(){ return 7; };
+ return ''[KEY](O) != 7;
+ })){
+ redefine(String.prototype, KEY, strfn);
+ hide(RegExp.prototype, SYMBOL, length == 2
+ // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
+ // 21.2.5.11 RegExp.prototype[@@split](string, limit)
+ ? function(string, arg){ return rxfn.call(string, this, arg); }
+ // 21.2.5.6 RegExp.prototype[@@match](string)
+ // 21.2.5.9 RegExp.prototype[@@search](string)
+ : function(string){ return rxfn.call(string, this); }
+ );
+ }
+};
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