Function operator<

Source/Utils/json.hpp:3404–3416

! @brief comparison operator for JSON types Returns an ordering that is similar to Python: - order: null < boolean < number < object < array < string < binary - furthermore, each type is not smaller than itself - discarded values are not comparable - binary is represented as a b"" string in python and directly comparable to a string; howev

        @since version 1.0.0
        */
        inline bool operator<(const value_t lhs, const value_t rhs) noexcept
        {
            static constexpr std::array<std::uint8_t, 9> order = { {
                    0 /* null */, 3 /* object */, 4 /* array */, 5 /* string */,
                    1 /* boolean */, 2 /* integer */, 2 /* unsigned */, 2 /* float */,
                    6 /* binary */
                }
            };

            const auto l_index = static_cast<std::size_t>(lhs);
            const auto r_index = static_cast<std::size_t>(rhs);
            return l_index < order.size() && r_index < order.size() && order[l_index] < order[r_index];
        }
    }  // namespace detail
}  // namespace nlohmann