NonNull struct test result

main.d

import NonNull, std.stdio;

// NonNull struct is located here:
// http://forum.dlang.org/thread/wspawctazpndhvdiouhz@forum.dlang.org

class Foo {
    void stuff() {
        writeln("Hi");
    }
    
    mixin TRef!(typeof(this));
}

void refThing(Ref!Foo f) {
    f.stuff();
}

void thing(Foo f) {
    f.stuff();
}

void main() {
    Ref!Foo myRefFoo = new Foo;
    Foo myFoo = new Foo;
    
    
    //myFoo.thing(); // works if mixin TRef!(typeof(this)) is commented above
    
    //myRefFoo.refThing();
    // if mixin commented-> Error: function expected before (), not refThing(myRefFoo) of type void
    // otherwise->  Error: forward reference to inferred return type of function call this._obj.getRef("C:\\D\\dmd2\\windows\\bin\\..\\..\\src\\phobos\\std\\typecons.d",2847u).opDispatch()
    //              Error: template instance NonNull.Ref!(Foo).Ref.Proxy!(_obj).opDispatch!("refThing").opDispatch!(Ref!(Foo)) error instantiating
    
    //myRefFoo.thing();
    // if mixin commented-> Error: function main.thing (Foo f) is not callable using argument types (Ref!(Foo))
    //                      Error: cannot implicitly convert expression (myRefFoo) of type Ref!(Foo) to main.Foo
    // otherwise -> same as myRefFoo.refThing()
    
    //myFoo.refThing();
    // same as myRefFoo.thing();
    
}