forward_capture.hpp

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#ifndef FORWARD_CAPTURE_HPP_INCLUDED
#define FORWARD_CAPTURE_HPP_INCLUDED
 
#include <tuple>
#include <utility> // std::forward
 
#define CHOPS_FWD(...) std::forward<decltype(__VA_ARGS__)>(__VA_ARGS__)
 
namespace chops {
 
namespace detail {
 
template <typename... Ts>
auto fwd_capture(Ts&&... xs) {
    return std::tuple<Ts...>(CHOPS_FWD(xs)...); 
}
 
}
 
template <typename T>
decltype(auto) access(T&& x) { return std::get<0>(CHOPS_FWD(x)); }
 
} // end namespace
 
#define CHOPS_FWD_CAPTURE(...) chops::detail::fwd_capture(CHOPS_FWD(__VA_ARGS__))
 
#endif