Re: Missing in Booch: range operations

[Simon Wright <simon@pushface.org>]

porton@ex-code.com (Victor Porton) writes:

> Range operations (deleting the range between two iterators, inserting 
> content of a container or its subrange into a position of another 
> container etc.) are missing in current Booch. Just to make sure that 
> these are not forgotten.

They are missing from the BCs because they were not in the C++ BCs of
which the Ada BCs are a translation. (I am on somewhat weak ground
here, because the C++ iterators were defined in the concrete
containers, somewhat like Charles).

I don't think you can rely even on "=" being meaningfully defined for
present BC iterators -- indeed, having more than one iterator over a
container is odd, and dangerous if you use Delete_Item_At.

> BTW, these should throw an exception if the begin and the end of the 
> range are from different containers.

Now that I can agree with, though there are arguments the other way.