### spawn

Start a new stackful coroutine.

Start a new stackful coroutine, calling the specified handler when it completes.

    template<
        typename Function>
    void spawn(
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes());
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    template<
        typename Handler,
        typename Function>
    void spawn(
        Handler && handler,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes(),
        typename enable_if< !is_executor< typename decay< Handler >::type >::value &&!execution::is_executor< typename decay< Handler >::type >::value &&!is_convertible< Handler &, execution_context & >::value >::type *  = 0);
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Start a new stackful coroutine, inheriting the execution context of another.

    template<
        typename Handler,
        typename Function>
    void spawn(
        basic_yield_context< Handler > ctx,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes());
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Start a new stackful coroutine that executes on a given executor.

    template<
        typename Function,
        typename Executor>
    void spawn(
        const Executor & ex,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes(),
        typename enable_if< is_executor< Executor >::value||execution::is_executor< Executor >::value >::type *  = 0);
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Start a new stackful coroutine that executes on a given strand.

    template<
        typename Function,
        typename Executor>
    void spawn(
        const strand< Executor > & ex,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes());
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Start a new stackful coroutine that executes in the context of a strand.

    template<
        typename Function>
    void spawn(
        const asio::io_context::strand & s,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes());
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Start a new stackful coroutine that executes on a given execution context.

    template<
        typename Function,
        typename ExecutionContext>
    void spawn(
        ExecutionContext & ctx,
        Function && function,
        const boost::coroutines::attributes & attributes = boost::coroutines::attributes(),
        typename enable_if< is_convertible< ExecutionContext &, execution_context & >::value >::type *  = 0);
      » more...

The `spawn()` function is a high-level wrapper over the Boost.Coroutine library. This function enables programs to implement asynchronous logic in a synchronous manner, as illustrated by the following example:

    asio::spawn(my_strand, do_echo);

    // ...

    void do_echo(asio::yield_context yield)
    {
      try
      {
        char data[128];
        for (;;)
        {
          std::size_t length =
            my_socket.async_read_some(
              asio::buffer(data), yield);

          asio::async_write(my_socket,
              asio::buffer(data, length), yield);
        }
      }
      catch (std::exception& e)
      {
        // ...
      }
    }

##### Requirements

Header: `asio/spawn.hpp`

Convenience header: None