import std.stdio;

class Foo
{
    static int count;
    int f1;
    this()
    {
        count++;
        f1 = 42;
        writefln("Constructed a Foo, %d exist!", count);
    }
    this(Foo f)
    {
        count++;
        writefln("Copied a Foo, %d exist! f1: %d", count, f1);
    }
};

void main()
{
    Foo foo1 = new Foo();
    Foo foo2 = new Foo();
    Foo foo3 = new Foo(foo1);
}