Allen Wirfs-Brock wrote:
Line 5.c.v is dealing with the ES5 requirement that "host objects" not
reuse the listed [[Class]] values for anything other than the
specified built-ins. This version of toStrimg extends the spirit to
that restriction to all user or implementation defined tag values. It
does this by prepending a "~" in front of those values if they appear
as a tag value. Note that ES5.1 includes "Object" in this list so I
also included it. But, I actually think it probably should be in the
censored list.
This is weird.
ES5 wanted to help SES and similar languages use some kind of
original_Object_prototype_toString_call(anyObject).slice(8,-1)
and not be subject to spoofing.
Adding @@toStringTag to enable DOM self-hosting runs directly counter to
this goal.
Prefixing "~" to core-language built-in classes (save "Object"?) does
not resolve the conflict if there are spoofing hazards in other
built-ins such as DOM objects as typically implemented in browsers.
Mark, can you weigh in? I had not heard of this "~"-prefixing idea.
/be
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
