AJG schrieb:
Steven Watanabe <watanabesj <at> gmail.com> writes:
Try using fusion::remove http://www.boost.org/libs/fusion/doc/html/fusion /algorithm/transformation/functions/remove.html
Thanks! That function seems to do exactly what I need. However, is it expected to work using boost::tuples? (I tried using fusion::vectors and it works perfectly.)
The issue I'm running into is that remove() returns a filter_view, which, I'm guessing, is convertible to a fusion::vector but not to a boost::tuple. Is there any way to make that latter conversion work?
I've already included:
#include <boost/fusion/include/remove.hpp> #include <boost/fusion/adapted/boost_tuple.hpp>
But it looks like boost::tuple isn't being adapted fully.
Including /fusion/adapted/boost_tuple.hpp just transforms any boost::tuple into an implementation of the random access sequence concept http://www.boost.org/doc/libs/1_43_0/libs/fusion/doc/html/fusion/sequence/co... i.e. all boost::tuple instantiations go along with fusion's intrinsic sequence functions. To construct a tuple from a fusion sequence, you should stick to the fusion container. For example: #include <boost/fusion/container/vector.hpp> #include <boost/fusion/algorithm/transformation/remove.hpp> struct E{}; int main() { using namespace boost::fusion; typedef vector<E, int, E, double, E, char, E> vec; typedef result_of::as_vector< result_of::remove<vec, E>::type >::type fvec; fvec f(0, 1.0, 'c'); } -Christopher