Re: [Boost-users] [Multi-Index] composite_key problems

From: Andreas Volz (lists_at_[hidden])
Date: 2005-10-31 13:27:19

Am Mon, 31 Oct 2005 18:14:00 +0100 schrieb JOAQUIN LOPEZ MU?Z:

> // lookup by (A,B);
> 
> es.find(make_tuple(a,b));
> 
> // lookup by A alone
> 
> es.find(make_tuple(a));
> 
> // lookup by B alone
> // note get<1> retrieves the second index.
> 
> es.get<1>().find(b);
> 
> Is the issue clearer now? If not, please tell me
> so and I'll try to explain myself a bit further.

A little clearer, but not at all. I'm really new to Boost, so I doesn't
understand all. The questions seems to by stupic, but how could I
access the data looked up by B alone? What should I assign to the left?

> ??? = es.get<1>().find(b);

An iterator or what else? There was a print_out_by_name function in
docs that I tried to adopt, but I failed. And the compile errors are
not very helpfull. As normal with template programming :-(

regards
Andreas