scoped classes

[Alex via Digitalmars-d-learn]

Hi all,
a short question about an example.
having read this:
https://dlang.org/library/std/typecons/scoped.html
There is a struct B defined in the middle of the example, with a 
scoped class member.
How to define an array of such members (and to put some items to 
it)?
So, I want to have something like

// Use as member variable
struct B
{
    typeof(scoped!A())[] a; // note the trailing parentheses

    this(int i)
    {
        // construct member
        a.length = 5; // doesn't work, as the default constructor 
is disabled.
        a ~= scoped!A(i); // doesn't work, as the type is not 
copyable
        // ???
    }
}