Class json_containers_for_alloc

less_slow.cpp:5103–5113

template <template <typename> typename allocator_>

struct json_containers_for_alloc {
    // Must allow `map<Key, Value, typename... Args>`, replaces `std::map`
    template <typename key_type_, typename value_type_, typename...>
    using object = std::map<key_type_, value_type_, std::less<>, allocator_<std::pair<key_type_ const, value_type_>>>;

    // Must allow `vector<Value, typename... Args>`, replaces `std::vector`
    template <typename value_type_, typename...>
    using array = std::vector<value_type_, allocator_<value_type_>>;

    using string = std::basic_string<char, std::char_traits<char>, allocator_<char>>;
};

template <template <typename> typename allocator_>
using json_with_alloc = nlohmann::basic_json<               //