Structs as reference types?

[sighoya]

What about:

```D
ptr struct S
{
      int i;
}
void main()
{
     S s = S(1);
     writeln("s: ",s.i); //1
}
```

instead of:

```D
struct _S
{
     int i;
}

alias S = _S*;
alias init(T:S) = (i) {return new PointerTarget!T(i);};//return 
new _S(i)

void main()
{
     S s = init!S(1);
     writeln("s: ",s.i);//1
}
```