On Sun, Dec 11, 2011, at 12:22 AM, Klaim - Joël Lamotte wrote:

Hi,

On Sat, Dec 10, 2011 at 17:22, Tim Burgess <tim@raisedbar.net> wrote:

All look-ups within the map based on the UUID then fail, as adding the
object to the map is essentially a copy operation and UUID is non-copyable,
so new unique identifiers were generated. I then tried:

Std::map <boost::uuids::uuid *, myClass*> myMap;

AFAIK uuid is copyable as it's a POD.

Correct, boost::uuids::uuid is copyable, it is a POD.

It can be used as the key in an std::map. I have created a simple test for this and checked it into trunk (http://svn.boost.org/svn/boost/trunk/libs/uuid/test/test_uuid_in_map.cpp). It passes. I have also attached the file.

I'm not sure where the problem is with your code. Could you provide a more complete example?

However, I don't know about this problem but I remember having failed to make uuid a key of map (I don't remember the reason).

If that can help you, I'm using a workaround to allow this : I convert the uuid to std::string (using the generator function) and use it in my whole application to allow finding by uuid from maps. That's obviously more expensive but it works fine.

Joël Lamotte

Regards,

Andy.