Is there a precedent for std :: unique_ptr <std :: array <T, N >>

Question

I came across something like:

using arr_t=std::array<std::array<std::array<int,1000>,1000>,1000>;
std::unique_ptr<arr_t> u_ptr;

The unique pointer was obviously used to solve the stackoverflow problem. Is there a case to use the previous code, and not just use it std::vector? Is there a real use case for std::unique_ptr<std::array<T,N>>?

Answer 1

The code above generates one continuous buffer of a billion elements with access [], which allows you to get elements in the form of a three-dimensional 1000-sided cube.

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