Method at

include/rabitqlib/utils/array.hpp:111–111

    [[nodiscard]] const_pointer data() const { return pointer_; }

    [[nodiscard]] reference at(size_t idx) { return pointer_[idx]; }
    [[nodiscard]] const_reference at(size_t idx) const { return pointer_[idx]; }

    void save(std::ofstream& output) const {