On Wed, Sep 8, 2010 at 2:48 PM, Steven Watanabe <watanabesj@gmail.com> wrote:

AMDG

Robert Jones wrote:

I expected this to work

#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/at_c.hpp>

typedef boost::fusion::vector<int, int> V;

int first( const V & v )
{
   return at_c<0>( v );
}

but I find I need a "using namespace boost::fusion;". Why isn't
this covered by ADL?
 

When calling a function template with
explicit template arguments, ADL is only
activated if at least one overload is found
by normal lookup.