Static Array Length Without Macros

#include "stdafx.h"

template<typename T>
struct Length final
{
    static const int value = sizeof(T) / sizeof(std::remove_extent<T>::type);

    static_assert ( std::is_array<T>::value, "can evaluate size only for arrays" );

    Length() = delete;
    Length(const Length&) = delete;
    Length& operator=(const Length&) = delete;
};

int _tmain(int, _TCHAR*)
{
    const int a[] = { 1, 2, 3, 4 };

    std::cout << Length<decltype(a)>::value << std::endl;

    for (auto i = 0; i < Length<decltype(a)>::value; ++i)
    {
        std::cout << a[i] << std::endl;
    }

    return 0;
}