...simpler:

	void swap(region R)(int*R a, int*R b);
	void swap(int* a...

...become a child scope (needed for a swap function for instance).

Basically, each pointer or...

...function  insert
function  erase
function  clear
function  swap
function  opIn_r
function  opApply
function  main...

...We best start from the safe end.

Swap will work fine because ref is not...

...this means you can't implement a swap function for this struct, then I think...

I hadn't thought about a swap function. Hrmmm...

...check against the constrain.

About reducing what swap can do, I'd like to see...

...it. What scope says in swap is only that swap itself does not escape any...

...other parameters (like for instance in a swap function).

Note that the const propogation issue...

...function that swap two variables then.

Basically, it's implemented like this:

	void swap(scope...