Re: hashed_maps

["Matthew Heaney" <mheaney@on2.com>]

Lucretia wrote:
>
> This is why I'm using a map to map between them, i.e. so I can find the
> Ada instance associated with the C++ instance.

Well, I still don't know what you're doing, but if you need a map then
Ada has those:

ada.containers.hashed_maps
ada.containers.ordered_maps

If you're using GCC 4.0, then you should have these in your path.
Otherwise, you might have to download a reference implementation.

http://charles.tigris.org/

For your problem, either map will do.  Type System.Address has a
relational operator ("<") so you can use that type (or equivalently, an
access type) as the key of the ordered map; or, you can use To_Integer
(declared in package System, or one of its children -- I forget which)
to implement a hash function, and hence use it as the key of the hashed
map.

-Matt