template <typename T, std::size_t SIZE_, T(&ARRAY_)[SIZE_]>
class array_wrapper

// Mutable array.
int data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

typedef array_wrapper<int, sizeof(data) / sizeof(int), data> WrappedData;

WrappedData wrappedData;

// Immutable array.
extern const int cdata[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

typedef array_wrapper<const int, sizeof(cdata) / sizeof(const int), cdata> WrappedCData;

WrappedCData wrappedCData;

WrappedData::const_reverse_iterator itr = wrappedData.crbegin();

while (itr != wrappedData.crend())
{
    Print(*itr++); // Prints the array in reverse order.
}

size_t size = wrappedData.size();

int lastItem = wrappedData.back();

wrappedData.fill(0);

template <typename T, std::size_t SIZE_, T(&ARRAY_)[SIZE_]>
class array_wrapper
{
public:

  typedef T                                     value_type;
  typedef std::size_t                           size_type;
  typedef T&                                    reference;
  typedef const T&                              const_reference;
  typedef T*                                    pointer;
  typedef const T*                              const_pointer;
  typedef T*                                    iterator;
  typedef const T*                              const_iterator;
  typedef std::reverse_iterator<iterator>       reverse_iterator;
  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

  // Indexes for positions in the array.
  enum
  {
    SIZE     = SIZE_,
    MAX_SIZE = SIZE_,
    FRONT    = 0,
    BACK     = SIZE - 1,
    BEGIN    = 0,
    END      = SIZE,
    RBEGIN   = SIZE - 1,
    REND     = -1
  };

  //*************************************************************************
  /// Returns a reference to the first element.
  //*************************************************************************
  reference front()
  {
    return *&ARRAY_[FRONT];
  }

  //*************************************************************************
  /// Returns a const reference to the first element.
  //*************************************************************************
  constexpr const_reference front() const
  {
    return *&ARRAY_[FRONT];
  }

  //*************************************************************************
  /// Returns a reference to the last element.
  //*************************************************************************
  reference back()
  {
    return *&ARRAY_[BACK];
  }

  //*************************************************************************
  /// Returns a const reference to the last element.
  //*************************************************************************
  constexpr const_reference back() const
  {
    return *&ARRAY_[BACK];
  }

  //*************************************************************************
  /// Returns a pointer to the first element of the internal storage.
  //*************************************************************************
  pointer data()
  {
    return &ARRAY_[BEGIN];
  }

  //*************************************************************************
  /// Returns a const pointer to the first element of the internal storage.
  //*************************************************************************
  constexpr const_pointer data() const
  {
    return &ARRAY_[BEGIN];
  }

  //*************************************************************************
  /// Returns an iterator to the beginning of the array.
  //*************************************************************************
  iterator begin()
  {
    return &ARRAY_[BEGIN];
  }

  //*************************************************************************
  /// Returns a const iterator to the beginning of the array.
  //*************************************************************************
  constexpr const_iterator begin() const
  {
    return &ARRAY_[BEGIN];
  }

  //*************************************************************************
  /// Returns a const iterator to the beginning of the array.
  //*************************************************************************
  constexpr const_iterator cbegin() const
  {
    return &ARRAY_[BEGIN];
  }

  //*************************************************************************
  /// Returns an iterator to the end of the array.
  //*************************************************************************
  iterator end()
  {
    return &ARRAY_[END];
  }

  //*************************************************************************
  /// Returns a const iterator to the end of the array.
  //*************************************************************************
  constexpr const_iterator end() const
  {
    return &ARRAY_[END];
  }

  //*************************************************************************
  // Returns a const iterator to the end of the array.
  //*************************************************************************
  constexpr const_iterator cend() const
  {
    return &ARRAY_[END];
  }

  //*************************************************************************
  // Returns an reverse iterator to the reverse beginning of the array.
  //*************************************************************************
  reverse_iterator rbegin()
  {
    return reverse_iterator(&ARRAY_[END]);
  }

  //*************************************************************************
  /// Returns a const reverse iterator to the reverse beginning of the array.
  //*************************************************************************
  constexpr const_reverse_iterator rbegin() const
  {
    return const_reverse_iterator(&ARRAY_[END]);
  }

  //*************************************************************************
  /// Returns a const reverse iterator to the reverse beginning of the array.
  //*************************************************************************
  constexpr const_reverse_iterator crbegin() const
  {
    return const_reverse_iterator(&ARRAY_[END]);
  }

  //*************************************************************************
  /// Returns a reverse iterator to the end of the array.
  //*************************************************************************
  reverse_iterator rend()
  {
    return reverse_iterator(&ARRAY_[BEGIN]);
  }

  //*************************************************************************
  /// Returns a const reverse iterator to the end of the array.
  //*************************************************************************
  constexpr const_reverse_iterator rend() const
  {
    return const_reverse_iterator(&ARRAY_[BEGIN]);
  }

  //*************************************************************************
  /// Returns a const reverse iterator to the end of the array.
  //*************************************************************************
  constexpr const_reverse_iterator crend() const
  {
    return const_reverse_iterator(&ARRAY_[BEGIN]);
  }

  //*************************************************************************
  /// Returns a reference to the indexed value.
  //*************************************************************************
  reference operator[](size_t i)
  {
    return ARRAY_[i];
  }

  //*************************************************************************
  /// Returns a const reference to the indexed value.
  //*************************************************************************
  constexpr const_reference operator[](size_t i) const
  {
    return ARRAY_[i];
  }

  //*************************************************************************
  /// Returns a reference to the indexed value.
  //*************************************************************************
  reference at(size_t i)
  {
    return ARRAY_[i];
  }

  //*************************************************************************
  /// Returns a const reference to the indexed value.
  //*************************************************************************
  constexpr const_reference at(size_t i) const
  {
    return ARRAY_[i];
  }

  //*************************************************************************
  /// Returns the size of the array.
  //*************************************************************************
  constexpr size_t size() const
  {
    return SIZE;
  }

  //*************************************************************************
  /// Returns the maximum possible size of the array.
  //*************************************************************************
  constexpr size_t max_size() const
  {
    return MAX_SIZE;
  }

  //*************************************************************************
  /// Fills the array.
  //*************************************************************************
  void fill(const T& value)
  {
    std::fill(begin(), end(), value);
  }

  //*************************************************************************
  /// Swaps the contents of arrays.
  //*************************************************************************
  template <typename U, U(&ARRAYOTHER)[SIZE_]>
  typename std::enable_if<std::is_same<T, U>::value, void>::type
    swap(etl::array_wrapper<U, SIZE_, ARRAYOTHER>& other)
  {
    for (size_t i = 0; i < SIZE; ++i)
    {
      std::swap(ARRAY_[i], other.begin()[i]);
    }
  }

  //*************************************************************************
  /// Equality for array wrappers.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator == (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                    const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return (SIZEL == SIZER) && std::equal(lhs.begin(), lhs.end(), rhs.begin());
  }

  //*************************************************************************
  /// Inequality for array wrapper.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator != (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                    const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return !(lhs == rhs);
  }

  //*************************************************************************
  /// Less-than for array wrapper.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator < (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                   const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return std::lexicographical_compare(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
  }

  //*************************************************************************
  /// Greater-than for array wrapper.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator > (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                   const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return rhs < lhs;
  }

  //*************************************************************************
  /// Less-than-equal for array wrapper.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator <= (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                    const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return !(lhs > rhs);
  }

  //*************************************************************************
  /// Greater-than-equal for array wrapper.
  //*************************************************************************
  template <typename TL, typename TR, std::size_t SIZEL, std::size_t SIZER, TL(&ARRAYL)[SIZEL], TR(&ARRAYR)[SIZER]>
  bool operator >= (const array_wrapper<TL, SIZEL, ARRAYL>& lhs,
                    const array_wrapper<TR, SIZER, ARRAYR>& rhs)
  {
    return !(lhs < rhs);
  }

  //*************************************************************************
  /// Swap.
  //*************************************************************************
  template <typename T, std::size_t SIZE, T(&ARRAYL)[SIZE], T(&ARRAYR)[SIZE]>
  void swap(array_wrapper<T, SIZE, ARRAYL>& lhs,
            array_wrapper<T, SIZE, ARRAYR>& rhs)
  {
    lhs.swap(rhs);
  }