import std.stdio;
import core.atomic;
import core.thread;
import core.sync.mutex;
import std.datetime.stopwatch;
import std.concurrency;
import std.traits;
import std.random;
import std.algorithm;
import std.conv;

struct Ref{
	string n;
};

struct E {}

struct A {
    int a;

    @Ref("a")
	E b;
    E c;
    E c1;
    E c2;
    E c3;
    void print() {
        static foreach(i, m; A.tupleof)
        static if (hasUDA!(m, Ref)) {{
            immutable auto n = getUDAs!(m, Ref)[0].n;
        	__traits(getMember, this, n) *= 2;
        }}
    }

}


void main()
{
    writeln("A.sizeof ", A.sizeof);
    auto a = A(1);
    writeln(a);

	a.print();

	writeln(a);
}