(Excuse the slow pace of this thread, I've been on vacation with little

access to the Internet).

 

---

De: boost-users-bounces@lists.boost.org [boost-users-bounces@lists.boost.org] En nombre de Ramesh [rramesh1@gmail.com]

Enviado el: jueves, 21 de agosto de 2008 0:17

Para: boost-users@lists.boost.org
Asunto: Re: [Boost-users] Multi-index container (Modifying non-unique key in the container)

On Wed, Aug 20, 2008 at 8:02 AM, JOAQUIN M. LOPEZ MUÑOZ <joaquin@tid.es> wrote:

 

Yes, but DataMap seems to *replicate* the keys that are already

present in A. Cannot you just have the following?

 

typedef multi_index_container<
  A*, 
    indexed_by<
        ordered_unique<
            tag <Key1>, BOOST_MULTI_INDEX_MEMBER(A,std::string,Key1)>,
        ordered_non_unique<
                  tag<Key2>,BOOST_MULTI_INDEX_MEMBER(A,long,Key2)>,   
              ordered_unique<
                  tag<Key3>,BOOST_MULTI_INDEX_MEMBER(A,long,Key3)>
    >
> tDMap;

[...]

>

 

 

> If I would remove the keys the map would just hold pointers and I wouldnt be able to

> do lookups based on the keys (to retrieve pointers to objects based on keys) if I wouldnt

> pair the pointers with they keys in the Map - thats why I have the keys in the map, please

> correct me if am wrong.

You can use the members of the pointed to objects of type A as keys of your container.

This is discussed in detail at:

 

http://www.boost.org/libs/multi_index/doc/reference/key_extraction.html#chained_pointers

 

In particular, I think that the tDMap definition I gave above should work directly. Please

report back if this is not the case.

 

Joaquín M López Muñoz

Telefónica, Investigación y Desarrollo

_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users