Quote from "dmd/html/d/attribute.html"
> The override attribute applies to virtual functions.
> It means that the function must override a function
> with the same name and parameters in a base class.

<< << sniplet 1 >> >>
class Parent{
    int check;
}

class Child : Parent{
    override int check;
}

<< << sniplet 2 >> >>
struct MyStruct{
    override int check;
}

<< << sniplet 3 >> >>
struct MyStruct{
    override int check(){
        return 0;
    }
}

<< << sniplet 4 >> >>
override int check;

<< << sniplet 5 >> >>
override int check(){
    return 0;
}

dmd 0.98 compiles the sources without any errors.

Thomas