#include <iostream>
#include <tuple>

using namespace std ;
/*
  tuple to array



*/


template <typename T, typename... Types, size_t... I>
constexpr array<T, sizeof...(Types)>
tuple_to_array_impl(   const tuple<Types...>& tupleObject , index_sequence<I...>  indexObject )
{
    return { static_cast<T>(get<I>(tupleObject))... }  ;
}

// Main conversion function
template <typename T, typename... Types>
constexpr array<T, sizeof...(Types)>
tuple2array(const tuple<Types...>& tupleObject )
{
    return tuple_to_array_impl<T>( tupleObject, make_index_sequence<sizeof...(Types)>{}  )  ;
}

//Create a std array from a tuple
int main()
{

  tuple<int, int, int> my_tuple = make_tuple(10,  20 , 30 )  ;
  array<int, 3> arr1 =  tuple2array<int>( my_tuple ) ;


    for (const auto& element : arr1)
    {
        cout << element << " ";
    }
    cout << "\n";




      return 0;
}