#include <iostream>
#include <boost/phoenix.hpp>

int main() {
    using boost::phoenix::let;
    using boost::phoenix::val;
    using boost::phoenix::ref;
    using boost::phoenix::construct;
    using namespace boost::phoenix::local_names;

    int i = 0;

    let(_a = val(i))[
        _a++,
        ref(i) = _a,
        std::cout << "i is now " << ref(i) << std::endl,
        construct<void>()    // contrived void return type
        ]();


}