stdArrayOf.hpp

template<typename T, std::enable_if_t<std::is_array_v<T>, std::nullptr_t> = nullptr>
struct arrayInfo
{
	using element_t = typename std::remove_reference<decltype(*std::begin(std::declval<T&>()))>::type;
	static constexpr size_t length = sizeof(T) / sizeof(element_t);
	using asStdArray = std::array<element_t, length>;
};

template<class T>
using stdArrayOf = typename arrayInfo<T>::asStdArray;

// stdArrayOf<int[3]> x; // <= std::array<int, 3>