Re: [Boost-users] [multi_index].[composite_key] Index creation at run-time.

From: Prashant Thakre (prashant.thakre_at_[hidden])
Date: 2006-06-08 04:56:57

Hi,

> OK, here, instead of a composite_key instantiation,
> you can take advantage directly of std::vector comparison
> semantics (you don't really need tuple_element):
> 
> typedef multi_index_container<
>   element,
>   indexed_by<
>     hashed_unique<
>       member<element,std::vector<const std::string>,&element::tp>
>     >
>     // other indices, maybe
>   >
> > element_collection;
> 

 Is this equivalent to having a member std::string tp which is constructed at 
run-time from all the elements of std::vector< const std::string > ? Also, how 
does the hash function generate the key ?

 Thanks a lot.

regards,
Prashant Thakre

Joaquin M Lopez Munoz <joaquin <at> tid.es> writes:
> 
> Prashant Thakre <prashant.thakre <at> gmail.com> writes:
> 
> Now, you can use n-sized vectors everywhere, where n is
> determined at run-time. Does this suit your needs?
> 
> Joaquín M López Muñoz
> Telefónica, Investigación y Desarrollo
> 
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