Re: 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 !