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Completion token type used to specify that the completion handler arguments should be combined into a single argument.
template<
    typename CompletionToken>
class as_single_t
| Name | Description | 
|---|---|
| Tag type used to prevent the "default" constructor from being used for conversions. | |
| Adapts an executor to add the as_single_t completion token as the default. | 
| Name | Description | 
|---|---|
| as_default_on [static] | Function helper to adapt an I/O object to use as_single_t as its default completion token type. | 
| as_single_t [constructor] | 
                  Default constructor.  | 
| Name | Description | 
|---|---|
        The experimental::as_single_t
        class is used to indicate that any arguments to the completion handler should
        be combined and passed as a single argument. If there is already one argument,
        that argument is passed as-is. If there is more than argument, the arguments
        are first moved into a std::tuple and that tuple is then passed
        to the completion handler.
      
        Header: boost/asio/experimental/as_single.hpp
      
Convenience header: None