#include <boost/range/adaptor/ref_unwrapped.hpp>
#include <iostream>
#include <vector>
struct example
{
int value;
};
int main(int argc, const char* argv[])
{
#if !defined(BOOST_NO_CXX11_DECLTYPE) \
&& !defined(BOOST_NO_CXX11_RANGE_BASED_FOR) \
&& !defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX) \
&& !defined(BOOST_NO_CXX11_AUTO_DECLARATIONS)
using boost::adaptors::ref_unwrapped;
example one{1};
example two{2};
example three{3};
std::vector<std::reference_wrapper<example> > input{one, two, three};
for (auto&& entry : input | ref_unwrapped)
{
std::cout << entry.value;
}
return 0;
#endif
}