array_concat.h

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#ifndef KOUTIL_TYPE_ARRAY_CONCAT_H
#define KOUTIL_TYPE_ARRAY_CONCAT_H
 
#include <array>
#include <cstddef>
#include <tuple>
#include <utility>
 
namespace koutil::type {
 
template <typename T, std::size_t... Sizes> constexpr auto array_concat(const std::array<T, Sizes>&... arrays) {
    constexpr std::size_t size = (Sizes + ...);
 
    auto all = std::tuple_cat(arrays...);
 
    return [&]<std::size_t... I>(std::index_sequence<I...>) {
        return std::array<T, size> { { std::get<I>(all)... } };
    }(std::make_index_sequence<size>());
}
 
}
 
#endif