rvalue references

[w0rp]

I feel I should mention a detail I observed. I am working on a 
library which generates D code from C++ code with wrappers. I 
found an interesting situation when I realised that I need to do 
something like this.

void setPosition(ref const(QPoint) point) {
      ...
      // Static array.
      auto stack = smokeStack(&point);

      cls.classFn(..., stack.ptr);
      ...
}

The above resulting in passing a pointer to a D struct which gets 
a reinterpret_cast on the C++ end and copied from that after 
that. Because I wish to also allow temporaries for this for 
obvious reasons, I must change my function signature to a 
template.

void setPosition()(auto ref const(QPointF) point);

So whatever happens with rvalue references, I would like to see 
the ability to take the address of an rvalue reference in a 
completely unsafe manner. (Or is const& an lvalue? I have 
forgetten my Scott Meyers knowledge.) I would make this an error 
in @safe functions, but allowable for @system and @trusted.