Class coroutine

include/boost/asio/coroutine.hpp:245–263

Provides support for implementing stackless coroutines. * The @c coroutine class may be used to implement stackless coroutines. The * class itself is used to store the current state of the coroutine. * * Coroutines are copy-constructible and assignable, and the space overhead is * a single int. They can be used as a base class: * * @code class session : coroutine * { * ... * }; @endcode

 * @li @c BOOST_ASIO_CORO_FORK instead of @c fork
 */
class coroutine
{
public:
  /// Constructs a coroutine in its initial state.
  coroutine() : value_(0) {}

  /// Returns true if the coroutine is the child of a fork.
  bool is_child() const { return value_ < 0; }

  /// Returns true if the coroutine is the parent of a fork.
  bool is_parent() const { return !is_child(); }

  /// Returns true if the coroutine has reached its terminal state.
  bool is_complete() const { return value_ == -1; }

private:
  friend class detail::coroutine_ref;
  int value_;
};

namespace detail {