### consign

Completion token adapter used to specify that the completion handler should carry additional values along with it.

    template<
        typename CompletionToken,
        typename... Values>
    constexpr consign_t< decay_t< CompletionToken >, decay_t< Values >... > consign(
        CompletionToken && completion_token,
        Values &&... values);

This completion token adapter is typically used to keep at least one copy of an object, such as a smart pointer, alive until the completion handler is called.

##### Requirements

Header: `asio/consign.hpp`

Convenience header: `asio.hpp`