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// Copyright 2003-2013 Christopher M. Kohlhoff
// Copyright Oliver Kowalke, Nat Goodspeed 2015.
// 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)
#ifndef BOOST_FIBERS_ASIO_YIELD_HPP
#define BOOST_FIBERS_ASIO_YIELD_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
namespace boost {
namespace fibers {
namespace asio {
//[fibers_asio_yield_t
class yield_t {
public:
yield_t() = default;
/**
* @code
* static yield_t yield;
* boost::system::error_code myec;
* func(yield[myec]);
* @endcode
* @c yield[myec] returns an instance of @c yield_t whose @c ec_ points
* to @c myec. The expression @c yield[myec] "binds" @c myec to that
* (anonymous) @c yield_t instance, instructing @c func() to store any
* @c error_code it might produce into @c myec rather than throwing @c
* boost::system::system_error.
*/
yield_t operator[]( boost::system::error_code & ec) const {
yield_t tmp;
tmp.ec_ = & ec;
return tmp;
}
//private:
// ptr to bound error_code instance if any
boost::system::error_code * ec_{ nullptr };
};
//]
//[fibers_asio_yield
// canonical instance
thread_local yield_t yield{};
//]
}}}
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#include "detail/yield.hpp"
#endif // BOOST_FIBERS_ASIO_YIELD_HPP
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