255   struct allocator  struct
257     typedef size_t size_type;
258     typedef ptrdiff_t difference_type;
259     typedef T* pointer;
260     typedef const T* const_pointer;
261     typedef T& reference;
262     typedef const T& const_reference;
263     typedef T value_type;
266     struct rebind
271     explicit allocator(int* count) BOOST_ASIO_NOEXCEPT  in allocator()  argument
276     allocator(const allocator& other) BOOST_ASIO_NOEXCEPT  in allocator()  argument
282     allocator(const allocator<U>& other) BOOST_ASIO_NOEXCEPT  in allocator()  argument
287     pointer allocate(size_type n, const void* = 0)  in allocate()
293     void deallocate(pointer p, size_type)  in deallocate()
299     size_type max_size() const  in max_size()
304     void construct(pointer p, const T& v)  in construct()
309     void destroy(pointer p)  in destroy()
314     int* count_;