Re: [boost] Re: Re: [multi_index + mpl + bind] Regression?

From: Joaquín Mª López Muñoz (joaquin_at_[hidden])
Date: 2004-09-27 11:21:57

Vladimir Prus ha escrito:

> Joaqu?n M? L?pez Mu?oz wrote:
>
> >> IIRC, the 'arg' visible via using is considered to be declared in the
> >> nearest namespace enclosing both mpl_ and boost::mpl -- which is global
> >> namespace. So boost::arg hides mpl_::arg. For explicit mpl::aux, the name
> >> lookup ignores the 'boost' namespace.
> >>
> >
> > Never heard of that rule. Do you happen to know where in the std can I
> > learn more about it?
>
> The first rule is 7.3.4/1: During unqualified name lookup, names appear as
> if they were declared in the nearest enclosing namespace which contains
> both the using-directive and the nominated namespace.
>
> The second rule is 3.4.3.2/2: Given X::m ... let S be the set of all
> declarations of m in X and the the transitive closure of all namespaces
> nominated by using directives in X ...
> So, for mpl::X, only mpl and mpl_ are searched, but not boost.
>

Man, and I thought I knew C++. Thanks for the pointer!

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo