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Traits type used to obtain the allocator associated with an object.
template<
    typename T,
    typename Allocator = std::allocator<void>>
struct associated_allocator
| Name | Description | 
|---|---|
| If T has a nested type allocator_type, T::allocator_type. Otherwise Allocator. | 
| Name | Description | 
|---|---|
| If T has a nested type allocator_type, returns t.get_allocator(). Otherwise returns a. | 
        A program may specialise this traits type if the T template
        parameter in the specialisation is a user-defined type. The template parameter
        Allocator shall be a type meeting the Allocator requirements.
      
        Specialisations shall meet the following requirements, where t
        is a const reference to an object of type T, and a
        is an object of type Allocator.
      
type that identifies a type meeting
            the Allocator requirements.
          get, callable
            as get(t) and with return type type.
          get, callable
            as get(t,a) and with return type type.
          
        Header: boost/asio/associated_allocator.hpp
      
        Convenience header: boost/asio.hpp