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The real handler type to be used for the asynchronous operation.
typedef boost::asio::async_result< typename decay< CompletionToken >::type, Signature >::completion_handler_type completion_handler_type;
| Name | Description | 
|---|---|
| The concrete completion handler type for the specific signature. | |
| The return type of the initiating function. | 
| Name | Description | 
|---|---|
| Construct an async result from a given handler. | |
| Obtain the value to be returned from the initiating function. | 
          The async_result
          traits class is used for determining:
        
The trait allows the handler and return types to be determined at the point where the specific completion handler signature is known.
This template may be specialised for user-defined completion token types. The primary template assumes that the CompletionToken is the completion handler.
          Header: boost/asio/async_result.hpp
        
          Convenience header: boost/asio.hpp