//          Copyright Oliver Kowalke 2013.
// 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 "boost/fiber/future.hpp"

namespace boost {
namespace fibers {

class future_error_category : public system::error_category
{
public:
    virtual const char* name() const BOOST_NOEXCEPT
    { return "future"; }

    virtual std::string 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");
    }
};

system::error_category const& future_category() BOOST_NOEXCEPT
{
    static fibers::future_error_category cat;
    return cat;
}

}}