Public variables inside interfaces

[Mariusz Gliwiński]

I like the possibility of abandoning () in function calls in D, so we 
can firstly make attribute public and then if implementation changes, 
smoothly change it into function:

call:
<code>
auto a = new A();
writeln("Size is " +a.size);
auto b = new B();
writeln("Size is " +b.size);

class A {
     public int size = 0;
}

class B {
     public int size() { return 0; }
}
</code>

Although, if I'd like to make interface Sizeable, it's impossible to 
treat attribute and method equally:
<code>
interface Sizeable {
/*
     int size;   // Error: variable Sizeable.size field not allowed in 
interface
     int size(); //
*/
class A : Sizeable {
     public int size = 0; // Error: Does not implements int size()
}

class B : Sizeable {
     public int size() { return 0; }
}
</code>

Is it possible to make it work?

Best regards,
Mariusz Gliwiński