Default initialization of structs?

[Gary Willoughby via Digitalmars-d-learn]

On Friday, 17 June 2016 at 10:53:40 UTC, Lodovico Giaretta wrote:
> struct Foo(T)
> {
>     private int _bar = 1;
>
>     this(int bar)
>     {
>         this._bar = bar;
>     }
> }
>
> auto foo = Foo!(string)();
>
> This should do the trick.

Thanks, I forgot to mention I'm also doing lots of other stuff in 
the constructor to private fields too.

struct Foo(T)
{
     private int _bar;
     private void* _baz;

     this(int bar = 8)
     {
         this._bar = bar;
         this._baz = malloc(this._bar);
     }
}

So I have to at least run a constructor.