[boost] Σχετ: [TypeSort] Automatic type sorting

That's actually very useful! However a less complicated interface would definitely be more appreciated! Maybe some wrapper functions or macros would do the trick. Στις 5:16 μ.μ. Παρασκευή, 20 Μαρτίου 2015, ο/η Mathias Gaunard έγραψε: On 20/03/2015 17:49, costis glynos wrote:

...

You also need to use Boost.Fusion to make it into a tuple at the end, since this is what you want.

Here is an example:

#include #include #include #include #include #include <iostream>

int main() {     namespace mpl = boost::mpl;     namespace fusion = boost::fusion;

    typedef mpl::vector types;     typedef mpl::sortmpl::_1                                       , mpl::sizeof_mpl::_2                                       >                       >::type sorted_types;     typedef fusion::result_of::as_vector::type tuple;

    tuple t;     std::cout << sizeof(t) << std::endl; // 8 instead of 12 }

This appears to work.

That's fantastic! Thank you for your recommendation.

You probably need to be able to access the final tuple with the original indices though, which is a bit more involved. #include #include #include #include #include #include #include #include #include #include #include #include #include #include <iostream> int main() {   namespace mpl = boost::mpl;   namespace fusion = boost::fusion;   typedef mpl::vector types;   typedef mpl::copy<     mpl::zip_view<       mpl::vector< types                   , mpl::range_c                   >     >   , mpl::back_inserter< mpl::vector0<> >   >::type indexes_types;   typedef mpl::sort<     indexes_types   , mpl::less< mpl::sizeof_< mpl::frontmpl::_1 >               , mpl::sizeof_< mpl::frontmpl::_2 >               >   >::type indexes_types_sorted;   typedef mpl::transform<     indexes_types_sorted   , mpl::frontmpl::_1   >::type sorted_types;   typedef mpl::transform<     indexes_types_sorted   , mpl::backmpl::_1   >::type sorted_indexes;   typedef fusion::result_of::as_vector::type tuple;   tuple t;   std::cout << sizeof( fusion::at_c::type::value>(t) ) << std::endl;   std::cout << sizeof( fusion::at_c::type::value>(t) ) << std::endl;   std::cout << sizeof( fusion::at_c::type::value>(t) ) << std::endl; } This could make an interesting addition to Boost.Fusion. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost