Re: [Boost-users] boost::multi_index help

Subject: Re: [Boost-users] boost::multi_index help
From: joaquin_at_[hidden]
Date: 2008-09-18 05:37:10

Axel escribió:
> I'm trying to use multi_index to store objects pointers. These objects
> have mainly 3 fields :
> - string name
> - int id
> - int block_id
>
> [...]
>
> The name & id indexes work well but I dont manage to get the Foo*
> pointers for a given block_id. I m using :
> foo_list_.get<block_id_>().find(1)  to grab the wanted list. My problem
> is that in the result I have not only Foo instances from the block 1.
> This is what I get when I try to query for a given block_id :
>
> For block 5 : only objects with block_id == 5
> For block 4 : objects with block_id == 4 and 5
> For block 3 : objects with block_id == 3, 4 and 5
> For block 2 : objects with block_id == 2, 3, 4 and 5
> and so on.
>   

I think you need to use equal_range here:

  // return a range comprising objects with block_id==3
  foo_list_.get<block_id_>().equal_range(3);

Does this help?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo