text: //
  // yield.hpp
  // ~~~~~~~~~
  //
  // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  //
  
  #include "coroutine.hpp"
  
  #ifndef reenter
  # define reenter(c) ASIO_CORO_REENTER(c)
  #endif
  
  #ifndef yield
  # define yield ASIO_CORO_YIELD
  #endif
  
  #ifndef fork
  # define fork ASIO_CORO_FORK
  #endif
  