Lars Viklund wrote:
Are you sure you're not misunderstanding what your implementation does? VC10 and GCC 4.4.5 makes (rightfully so) a 1-tuple with an element of type pair<T1,T2> when invoking make_tuple with a pair.
What I mean is this: #include <boost/tuple/tuple.hpp> void trigger (::std:: pair < int, int > const &p) { ::boost:: get < 0 > (::boost:: tuple < int, int > (p)) == p. first; } error: no matching function for call to ‘boost::tuples::tuple<int, int>::tuple(const std::pair<int, int>&)’ Compare: #include <tr1/tuple> void trigger (::std:: pair < int, int > const &p) { ::std:: tr1:: get < 0 > (::std:: tr1:: tuple < int, int > (p)) == p. first; } I guess this, and Joel’s comment about boost fusion, means boost tuple should be deprecated. Chris