thread/futures/future_error_code.hpp

0001 //  (C) Copyright 2008-10 Anthony Williams
0002 //  (C) Copyright 2011-2012,2015 Vicente J. Botet Escriba
0003 //
0004 //  Distributed under the Boost Software License, Version 1.0. (See
0005 //  accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007
0008 #ifndef BOOST_THREAD_FUTURES_FUTURE_ERROR_CODE_HPP
0009 #define BOOST_THREAD_FUTURES_FUTURE_ERROR_CODE_HPP
0010
0011 #include <boost/thread/detail/config.hpp>
0012 #include <boost/core/scoped_enum.hpp>
0013 #include <boost/system/error_code.hpp>
0014 #include <boost/type_traits/integral_constant.hpp>
0015
0016 namespace boost
0017 {
0018
0019   //enum class future_errc
0020   BOOST_SCOPED_ENUM_DECLARE_BEGIN(future_errc)
0021   {
0022       broken_promise = 1,
0023       future_already_retrieved,
0024       promise_already_satisfied,
0025       no_state
0026   }
0027   BOOST_SCOPED_ENUM_DECLARE_END(future_errc)
0028
0029   namespace system
0030   {
0031     template <>
0032     struct BOOST_SYMBOL_VISIBLE is_error_code_enum< ::boost::future_errc> : public true_type {};
0033
0034     #ifdef BOOST_NO_CXX11_SCOPED_ENUMS
0035     template <>
0036     struct BOOST_SYMBOL_VISIBLE is_error_code_enum< ::boost::future_errc::enum_type> : public true_type { };
0037     #endif
0038   } // system
0039
0040   BOOST_THREAD_DECL
0041   const system::error_category& future_category() BOOST_NOEXCEPT;
0042
0043   namespace system
0044   {
0045     inline
0046     error_code
0047     make_error_code(future_errc e) BOOST_NOEXCEPT
0048     {
0049         return error_code(underlying_cast<int>(e), boost::future_category());
0050     }
0051
0052     inline
0053     error_condition
0054     make_error_condition(future_errc e) BOOST_NOEXCEPT
0055     {
0056         return error_condition(underlying_cast<int>(e), boost::future_category());
0057     }
0058   } // system
0059 } // boost
0060
0061 #endif // header