Re: [Boost-users] [mpl] Using max_element inside a fold while constructing a vector

try push_back<_1, deref > >. i.e. don't use ::type in an MPL Lambda expression.

That doesn't work either. Below is a full code example as I think it should be from your feedback (I have tried in GCC and MSVC2010): #include #include #include #include #include #include #include #include <iostream> #include <typeinfo> using namespace boost::mpl; using namespace boost::mpl::placeholders; typedef vector, int_<3>, int_<2> > v1; // I want to use max_element on a vector I am in the process of constructing using a fold typedef fold >, push_back<_1, deref > >

::type v2;

struct print_value { template <typename data_tpt> void operator()(data_tpt p) { //Uncommenting this is what I would like but fails to compile //std::cerr << "value: " << data_tpt::value << std::endl; std::cerr << "value: " << typeid(p).name() << std::endl; } }; int main() { for_each(print_value()); return 0; } This produces a compile error in MSVC 2010 and compiles on GCC but produces bad results: value: N4mpl_4int_ILi0EEE value: N5boost3mpl5derefINS0_11max_elementIN4mpl_3argILi1EEENS0_4lessINS4_ILin1EEES7_EEEEEE value: N5boost3mpl5derefINS0_11max_elementIN4mpl_3argILi1EEENS0_4lessINS4_ILin1EEES7_EEEEEE value: N5boost3mpl5derefINS0_11max_elementIN4mpl_3argILi1EEENS0_4lessINS4_ILin1EEES7_EEEEEE I expect all to be similar to: N4mpl_4int_ILi0EEE