AMDG On 03/14/2012 01:25 AM, Peter Nyssen wrote:
<snip> typedef typename mpl::fold< initial_vector, mpl::pair<mpl::vector<>, mpl::vector<> >, mpl::if_< is_tag1<mpl::first<mpl::_2> >, mpl::push_back< mpl::first<mpl::_1>, mpl::second<mpl::_2> >, mpl::push_back< mpl::second<mpl::_1>, mpl::second<mpl::_2> > > >::type sorted_pair;
<snip>
//-------------------------------------
$ g++4 -Wall -I ../boost/ -o test test.cpp test.cpp: In function 'int main()': test.cpp:28: error: using 'typename' outside of template
This should be obvious.
../boost/boost/mpl/pair.hpp:56: error: no type named 'second' in 'struct boost::mpl::v_item<mpl_::int_<1>, boost::mpl::vector<mpl_::na, mpl_::na, <snip>,
The state should be a pair of vectors, but the fold operation produces a single vector. In Christ, Steven Watanabe