Re: [Boost-users] Elegant solution to interview question about boost::fusion::vector

29 Mar 2013


      AMDG

On 03/29/2013 09:43 AM, Stuart wrote:
...
// Functor that extracts nth element of row vector.
template <unsigned N>
struct tuple_at
{
    template <class Vector>
    typename boost::fusion::result_of::at_c::type
    operator()(Vector const& t) const
    {
        return boost::fusion::at_c(t);
    }
};
<snip>
However, I think that I should be able to achieve the same without the
template tuple_at.
<snip>
boost::phoenix::at_c<N>(boost::phoenix::placeholders::_1)

In Christ,
Steven Watanabe