struct constructor with rvalue param of same struct type

[vitamin]

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;
     }();

}