es6.regexp.constructor.js
1.36 KB
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var $ = require('./$')
, global = require('./$.global')
, isRegExp = require('./$.is-regexp')
, $flags = require('./$.flags')
, $RegExp = global.RegExp
, Base = $RegExp
, proto = $RegExp.prototype
, re1 = /a/g
, re2 = /a/g
// "new" creates a new object, old webkit buggy here
, CORRECT_NEW = new $RegExp(re1) !== re1;
if(require('./$.descriptors') && (!CORRECT_NEW || require('./$.fails')(function(){
re2[require('./$.wks')('match')] = false;
// RegExp constructor can alter flags and IsRegExp works correct with @@match
return $RegExp(re1) != re1 || $RegExp(re2) == re2 || $RegExp(re1, 'i') != '/a/i';
}))){
$RegExp = function RegExp(p, f){
var piRE = isRegExp(p)
, fiU = f === undefined;
return !(this instanceof $RegExp) && piRE && p.constructor === $RegExp && fiU ? p
: CORRECT_NEW
? new Base(piRE && !fiU ? p.source : p, f)
: Base((piRE = p instanceof $RegExp) ? p.source : p, piRE && fiU ? $flags.call(p) : f);
};
$.each.call($.getNames(Base), function(key){
key in $RegExp || $.setDesc($RegExp, key, {
configurable: true,
get: function(){ return Base[key]; },
set: function(it){ Base[key] = it; }
});
});
proto.constructor = $RegExp;
$RegExp.prototype = proto;
require('./$.redefine')(global, 'RegExp', $RegExp);
}
require('./$.set-species')('RegExp');