isTemplate and isValue?

[Shriramana Sharma via Digitalmars-d-learn]

Hello. Re my posting just now re AliasSeq being able to contain a template 
identifier too, I wonder whether it is possible to have a std.traits 
template to identify whether something is a template or not?

In connection with this, while is() is there to determine whether something 
is a type or not, what should I use to determine whether something is a 
value or not?

These would be useful to identify the kind of a member of an AliasSeq...

-- 
Shriramana Sharma, Penguin #395953