test if the alias of a template is a literal

[TheFlyingFiddle via Digitalmars-d-learn]

On Thursday, 27 October 2016 at 14:04:23 UTC, Gianni Pisetta 
wrote:
> Hi all,
> but at the moment isStringLiteral will return true even with 
> variables of type string. So i searched for a metod to check if 
> an alias is a literal value, but found nothing. Anyone have any 
> clue on how can be done?
>
> Thanks,
> Gianni Pisetta

Not really understanding your problem. Could you include an 
example use that is problematic?