Anything, but please make this happen. Considering how alias this
is implemented in the first place, I really doubt a simple
implementation exists. Maybe a simpler one, I'm not familiar
enough with the codebase to judge, but certainly not a simple one
(dug into the alias this code not so long ago).
Considering this, I do think this is reasonable to accept some
level a complexity in the PR that may not seems strictly required
at first glance.
alias this, is a complex feature as it interact with identifier
resolution, casting, choosing overload when calling and some
more. This is the nature of the beast.
