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// Use, modification and distribution are subject to 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 <boost/thread/detail/config.hpp>

#ifndef BOOST_NO_EXCEPTIONS

#include <boost/thread/futures/future_error_code.hpp>

#include <string>

namespace boost

{

namespace thread_detail

{

class future_error_category :

public boost::system::error_category

{

public:

virtual const char* name() const BOOST_NOEXCEPT;

virtual std::string message(int ev) const;

};

const char*

future_error_category::name() const BOOST_NOEXCEPT

{

return "future";

}

std::string

future_error_category::message(int ev) const

{

switch (BOOST_SCOPED_ENUM_NATIVE(future_errc)(ev))

{

case future_errc::broken_promise:

return std::string("The associated promise has been destructed prior "

"to the associated state becoming ready.");

case future_errc::future_already_retrieved:

return std::string("The future has already been retrieved from "

"the promise or packaged_task.");

case future_errc::promise_already_satisfied:

return std::string("The state of the promise has already been set.");

case future_errc::no_state:

return std::string("Operation not permitted on an object without "

"an associated state.");

}

return std::string("unspecified future_errc value\n");

}

future_error_category future_error_category_var;

}

BOOST_THREAD_DECL

const system::error_category&

future_category() BOOST_NOEXCEPT

{

return thread_detail::future_error_category_var;

}

#endif

thread/src/future.cpp at develop · boostorg/thread · GitHub

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