How do you test whether a variable is static or not?

[Basile B. via Digitalmars-d-learn]

On Saturday, 30 July 2016 at 13:04:56 UTC, Ali Çehreli wrote:
> On 07/30/2016 05:47 AM, Jonathan M Davis via 
> Digitalmars-d-learn wrote:
> > I'm writing some serialization code where I need to skip
> static variables.
> > So, I have a symbol from a struct, and I'd like to test
> whether it's static
> > or not.
>
> static variables don't have the .offsetof property:
>
> struct S {
>     int a;
>     static int b;
> }
>
>
> // Bonus question: should field be alias or string?
> template isStaticVar(T, alias field)
> {
>     enum isStaticVar = !__traits(compiles, mixin("T." ~ field ~ 
> ".offsetof"));
> }
>
> void main() {
>     static assert (!isStaticVar!(S, "a"));
>     static assert (isStaticVar!(S, "b"));
> }
>
> Ali

Wow, this is directly for std.traits !