class paged_storage : json::storage
{
    struct block;

public:
    virtual
    ~paged_storage() = default;

    void*
    allocate(
        std::size_t n,
        std::size_t align) override
    {
    }

    void
    deallocate(
        void* p,
        std::size_t n,
        std::size_t align) noexcept override
    {
    }

    bool
    is_equal(storage const&) const noexcept override
    {
        return false;
    }
};