Invariant -- question #2

[Ary Borenszweig]

Jarrett Billingsley wrote:
> On Tue, Oct 21, 2008 at 11:14 AM, Lars Ivar Igesund
> <larsivar at igesund.net> wrote:
>> It was changed when invariant was introduced to D2 as to make a transition
>> path ... I think it was announced too.
> 
> I can't find anything about it in the changelog, but maybe it was
> buried in the newsgroups somewhere.  W has a habit of not announcing
> important changes until three months later when he mentions it in
> passing in a reply as if everyone knew about it.

Does anyone know about

=this() {
}

?