275   struct allocator  struct
277     typedef size_t size_type;
278     typedef ptrdiff_t difference_type;
279     typedef T* pointer;
280     typedef const T* const_pointer;
281     typedef T& reference;
282     typedef const T& const_reference;
283     typedef T value_type;
286     struct rebind
291     explicit allocator(int* count) BOOST_ASIO_NOEXCEPT  in allocator()  function
296     allocator(const allocator& other) BOOST_ASIO_NOEXCEPT  in allocator()  argument
302     allocator(const allocator<U>& other) BOOST_ASIO_NOEXCEPT  in allocator()  function
307     pointer allocate(size_type n, const void* = 0)  in allocate()
313     void deallocate(pointer p, size_type)  in deallocate()
319     size_type max_size() const  in max_size()
324     void construct(pointer p, const T& v)  in construct()
329     void destroy(pointer p)  in destroy()
334     int* count_;