Spawn a new thread of execution.

template<
    typename Executor,
    typename F,
    typename CompletionToken,
    typename  = typename enable_if<is_executor<Executor>::value>::type>
auto co_spawn(
    const Executor & ex,
    F && f,
    CompletionToken && token);
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template<
    typename ExecutionContext,
    typename F,
    typename CompletionToken,
    typename  = typename enable_if<      is_convertible<ExecutionContext&, execution_context&>::value>::type>
auto co_spawn(
    ExecutionContext & ctx,
    F && f,
    CompletionToken && token);
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template<
    typename Executor,
    typename F,
    typename CompletionToken>
auto co_spawn(
    const await_token< Executor > & parent,
    F && f,
    CompletionToken && token);
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Requirements

Header: boost/asio/experimental/co_spawn.hpp

Convenience header: boost/asio/experimental.hpp