struct constructor with rvalue param of same struct type

[vitamin via Digitalmars-d-learn]

Hello, is it possible to create constructor which initialize 
'ptr3' with const rvalue of same type?

struct Foo{}
static struct Ptr{
    void* impl;

    //ctor 1
    this(ref const typeof(this) x)pure nothrow @trusted 
@nogc{/*...*/}

    //ctor 2
    this(const Foo foo)pure nothrow @trusted @nogc{/*...*/}

    //ctor 3
    //Error: `struct Ptr` may not define both a rvalue 
constructor and a copy constructor
    //this(const typeof(this) ptr)pure nothrow @trusted 
@nogc{/*...*/}   //


}

void main(){

    const Ptr cptr;
    Ptr ptr1 = cptr;    //call ctor 1

    Ptr ptr2 = delegate const(Foo)(){   //call ctor 2
        return typeof(return).init;
    }();

    Ptr ptr3 = delegate const(Ptr)(){   //error
        return typeof(return).init;
    }();

}