Re: [Boost-users] [tuple][mpl][fusion] How to " prune" or " collapse" a tuple?

AJG schrieb:

Steven Watanabe 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 #include

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 #include struct E{}; int main() { using namespace boost::fusion; typedef vector vec; typedef result_of::as_vector< result_of::remove::type >::type fvec; fvec f(0, 1.0, 'c'); } -Christopher