#include <boost/phoenix/core.hpp>
#include <boost/phoenix/function.hpp>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

template<typename T>
struct Var
{
    void setMax(int i) {}
    void setMin(int i) {}
    int getMax() { return 0; }
    int getMin() { return 0; }
};

namespace impl
{
    template <typename T1>
    void squeeze(T1 t, int i)
    {
        t.first.setMax(t.second.getMax() - i);
        t.second.setMin(t.first.getMin() + i);
    }
}

BOOST_PHOENIX_ADAPT_FUNCTION(void, squeeze, impl::squeeze, 2)

int main()
{
    using boost::phoenix::arg_names::_1;
    std::vector<std::pair<Var<int>, Var<double> > > vec;
    std::for_each(vec.begin(), vec.end(), squeeze(_1, 2));
}