Constants doesn't have UDA's?

[Temtaime]

Hello guys!

@("att") int t = 1;
auto b = [ __traits(getAttributes, t) ];

Works.

@("att") enum int t = 1;
auto b = [ __traits(getAttributes, t) ];

Works also.

@("att") const int t = 1;
auto b = [ __traits(getAttributes, t) ];

Doesn't work.
Error: first argument is not a symbol

Why?
Also a little another question can i detect if variable is static 
or not?
Regards.