tuple_like_interface_for_array_wrapper, C++ (gcc)

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//g++  4.9.3

#include <iostream>
#include <tuple>
#include <array>
    
template<typename T, std::size_t N>
struct Foo
{
    std::array<T, N>& GetData() { return data; }
    std::array<T, N> data;
};

template<typename T, std::size_t N>
struct FooDerived : Foo <T, N>
{
};

template<typename T, std::size_t N>
struct Bar
{
    std::array<T, N>& GetData()
    {
        return data;
    }
    std::array<T, N> data;
};

namespace std {

///////////////////////////////////////////////////////////////////////////////
// get(Foo) // function definition //
///////////////////////////////////////////////////////////////////////////////
template<std::size_t I, typename TArg, std::size_t NArg>
TArg& get(Foo<TArg, NArg>& i_array)
  {
  return get<I>(i_array.GetData());
  }

//-----------------------------------------------------------------------------
template<std::size_t I, typename TArg, std::size_t NArg>
TArg const& get(Foo<TArg, NArg> const& i_array)
  {
  return get<I>(i_array.GetData());
  }

///////////////////////////////////////////////////////////////////////////////
// tuple_size(A) // class definition //
///////////////////////////////////////////////////////////////////////////////
template<template<typename, std::size_t> class T, typename TArg, std::size_t NArg>
class tuple_size<T<TArg, NArg>>
  : public integral_constant<std::size_t, NArg>
  {
  };

///////////////////////////////////////////////////////////////////////////////
// tuple_size(A) // class definition //
///////////////////////////////////////////////////////////////////////////////
template<std::size_t I, template<typename, std::size_t> class T, typename TArg, std::size_t NArg>
struct tuple_element<I, T<TArg, NArg>>
  {
  using type = TArg;
  };

} // namespace std

int main()
{
    std::tuple_element<0, FooDerived<int, 5>>::type foo0;
    int foo_size = std::tuple_size<FooDerived<int, 10>>::value;
    std::tuple_element<0, Bar<float, 5>>::type bar0;
    int bar_size = std::tuple_size<Bar<float, 10>>::value;
}

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Compilation time: 0.32 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0,55 sec