DIP54 : revamp of Phobos tuple types

[Dicebot]

On Monday, 23 December 2013 at 01:53:57 UTC, Timon Gehr wrote:
> How is this going to be implemented? In a similar way as this?:
> https://d.puremagic.com/issues/show_bug.cgi?id=11804

Without `alias this` part (that would destroy "no auto expansion" 
part unless I miss something). Also I am still uncertain about 
implementing it as templated struct or just raw template - both 
have own merits and flaws, will make better comparison in process.