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// future -*- C++ -*-

// Copyright (C) 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

#include <future>

namespace

{

  struct future_error_category : public std::error_category

  {

    virtual const char*

    name() const

    { return "future"; }

    virtual std::string message(int __ec) const

    {

      std::string __msg;

      switch (std::future_errc(__ec))

      {

      case std::future_errc::broken_promise:

          __msg = "Broken promise";

          break;

      case std::future_errc::future_already_retrieved:

          __msg = "Future already retrieved";

          break;

      case std::future_errc::promise_already_satisfied:

          __msg = "Promise already satisfied";

          break;

      default:

          __msg = "Unknown error";

          break;

      }

      return __msg;

    }

  };

  const future_error_category&

  __future_category_instance()

  {

    static const future_error_category __fec;

    return __fec;

  }

}

namespace std

{

  const error_category* const future_category = &__future_category_instance();

  future_error::~future_error() throw() { }

  const char*

  future_error::what() const throw() { return _M_code.message().c_str(); }

}