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#include <tuple>
#include <iostream>
#include <algorithm>
#include <bobcat/typetrait>
template <typename ...Types>
struct Multi
{
std::tuple<Types...> d_tup;
Multi(Types &&...types)
:
d_tup(std::forward<Types>(types)...)
{}
};
template <typename Result, typename Opnd, typename ...Cntxt>
struct Wrapper
{
mutable std::tuple<Cntxt...> d_cntxt;
Result (*d_fun)(Opnd, std::tuple<Cntxt...>& );
Wrapper(Result fun(Opnd, std::tuple<Cntxt...> &), Cntxt &&...cntxt)
:
d_cntxt(std::forward<Cntxt>(cntxt)...),
d_fun(fun)
{}
Result operator()(Opnd &&opnd) const
{
return d_fun(std::forward<Opnd>(opnd), d_cntxt);
}
};
using namespace std;
void handle(std::string const &str, tuple<size_t &, ostream &> &tup)
{
++get<0>(tup);
get<1>(tup) << "Saw: " << str << '\n';
}
int main(int argc, char **argv)
{
Multi<int, double, int> multi{ 3, 12.5, 5 };
size_t count = 0;
for_each(argv, argv + argc, Wrapper<void, std::string const &,
size_t &, ostream &>(handle, count, cout));
cout << "========> " << count << '\n';
cout << get<1>(multi.d_tup) << '\n';
}
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