Why do std.traits use template foo(args...) instead of foo(alias arg) ?

[Dicebot via Digitalmars-d-learn]

On Thursday, 18 December 2014 at 17:20:28 UTC, Mathias LANG wrote:
> Thanks for the precision. Is it something that is going to be 
> fixed, or is it by design ?

It is something that most likely would have been designed 
differently if we had another chance (aka D3) but unlikely to 
change in D2 as existing pattern works good enough in practice. 
It is confusing but usually only needed for power user libraries 
thus learning curve impact is low.