Re: [Boost-users] [Fusion, maybe?] Workings of ADL.

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. In Christ, Steven Watanabe