Re: [Boost-users] testing for multi_index equality

From: francesco biscani (bluescarni_at_[hidden])
Date: 2008-05-09 15:36:18

Hi Joaquin,

does this mean that if the zeroth index is unordered or ordered but
non-unique you could have a false negative in the equality test due to
elements ordering being undefined?

Regards,

  Francesco.

On Fri, May 9, 2008 at 6:53 PM, JOAQUIN M. LOPEZ MUÑOZ <joaquin_at_[hidden]>
wrote:

>  Hi Ted,
>
>  ------------------------------
> *De:* boost-users-bounces_at_[hidden] [
> boost-users-bounces_at_[hidden]] En nombre de Ted Pederson [
> ted.pederson_at_[hidden]]
> *Enviado el:* viernes, 09 de mayo de 2008 18:03
> *Para:* boost-users_at_[hidden]
> *Asunto:* [Boost-users] testing for multi_index equality
> >
>  >Is there an easy way to test two multi_index containers for equality, c1
> == c2?
>
> c1 == c2 is defined to be equivalent to c1.get<0>()==c2.get<0>(), which
> is defined if the first index of the container is of type ordered,
> sequenced or
> random access; in all these cases the expression is in fact equivalent to
>
>   c1.size()==c2.size()&&std::equal(c1.begin(),c1.end(),c2.begin());
>
> Is this not what you had in mind?
>
> Joaquín M López Muñoz
> Telefónica, Investigación y Desarrollo
>
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