boost_phoenix.cpp

#include <algorithm>
#include <iostream>
#include <string>
#include <vector>

#include <boost/phoenix/phoenix.hpp>

struct isEvenImpl
{
    template<typename Arg>
    bool operator()(Arg arg) const
    {
        return arg % 2 == 0;
    }
};

boost::phoenix::function<isEvenImpl> isEven;

int main()
{
    using namespace boost::phoenix::placeholders;
    using boost::phoenix::val;
    
    std::vector<int> numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9};
    std::vector<int> multiples5 = {5, 10, 15, 20, 25, 30, 35, 40, 45};
    std::vector<int> results;
    
    std::for_each(begin(numbers), end(numbers),
                  if_(isEven(arg1))
                  [
                      std::cout << val("Even ")
                  ].
                  else_
                  [
                      std::cout << val("Odd ")
                  ]);
    
    
    std::cout << '\n' << '\n';
}