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#include 
#include 

struct my_struct {
const std::tuple t{5, 3.14};

template
decltype(std::get(t)) get() {
return std::get(t);
}
};

namespace std {
template
struct tuple_size :
integral_constant<
std::size_t,
std::tuple_size_v> {
};

template
struct tuple_element {
using type = tuple_element_t<
i,
decltype(std::declval().t)>;
};
}

int main() {
my_struct s;

auto [x, y] = s;
std::cout