|  | 
        A type trait that determines the result type of a prefer
        expression.
      
template< typename T, typename... Properties> struct prefer_result
| Name | Description | 
|---|---|
| The result of the prefer expression. | 
        Class template prefer_result
        is a trait that determines the result type of the expression asio::prefer(std::declval<T>(),
        std::declval<Properties>()...).
      
        Header: asio/prefer.hpp
      
        Convenience header: asio.hpp