No one have comments on this?
From: nbdd0...@hotmail.com
To: ljh...@gmail.com
Subject: Re: @@toStringTag spoofing for null and undefined
Date: Sat, 31 Jan 2015 06:03:17 +0000
CC: es-discuss@mozilla.org
Are the checks for these internal slots continuing to exist? Or shall
we just set the @@toStringTag on their prototype and drop these steps.
For example:If the this value is undefined, return "[object Undefined]".
If the this value is null, return "[object Null]".
If O has an [[ParameterMap]] internal
slot, let builtinTag be "Arguments". Else, let
builtinTag be "Object".
Let tag be the result of GetV (O, @@toStringTag).
ReturnIfAbrupt(tag).
If tag is undefined, let tag be builtinTag.
Else,
If Type(tag) is not String, let tag be
"???".Return the String value that is the result of
concatenating the three Strings "[object ", tag,
and "]".Under the condition that Object.prototype[@@toStringTag],
String.prototype[@@toStringTag]], etc are properly set.
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