1//
2// yield.hpp
3// ~~~~~~~~~
4//
5// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6//
7// Distributed under the Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9//
10
11#include "coroutine.hpp"
12
13#ifndef reenter
14# define reenter(c) BOOST_ASIO_CORO_REENTER(c)
15#endif
16
17#ifndef yield
18# define yield BOOST_ASIO_CORO_YIELD
19#endif
20
21#ifndef fork
22# define fork BOOST_ASIO_CORO_FORK
23#endif
24

source code of boost/boost/asio/yield.hpp