Re: [Boost-users] [fusion] incremental zipping

Gennadiy Rozental writes:

Christopher Schmidt writes:

...

auto v=push_back( push_back( push_back( make_vector(),boost::ref(a)),boost::ref(b)),boost::ref(c)); auto z=zip_view(v);

This is not what I want. Let @ denote zipping operation. I want:

x = a @ b // x == ((0,1),(1,2)) ... y = x @ c // y = ((0,1,2),(1,2,3))

Right now I am getting y = (((0,1),2),((1,2),3))

Gennadiy

P.S. You example does not work for me push_back.hpp does not build under MSVC10

That's a tough questions. You cannot unzip a zip_view, add another sequence, and zip it again. I'd either use transform to flatten the nested zip_view's, or I'd store the sequences separately and rebuild the zip_view every time on the fly. Christopher