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+/* Proposed SG14 status_code
+(C) 2018-2019 Niall Douglas <http://www.nedproductions.biz/> (5 commits)
+File Created: Feb 2018
+
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef BOOST_OUTCOME_SYSTEM_ERROR2_SYSTEM_CODE_HPP
+#define BOOST_OUTCOME_SYSTEM_ERROR2_SYSTEM_CODE_HPP
+
+#include "posix_code.hpp"
+
+#if defined(_WIN32) || defined(BOOST_OUTCOME_STANDARDESE_IS_IN_THE_HOUSE)
+#include "nt_code.hpp"
+#include "win32_code.hpp"
+// NOT "com_code.hpp"
+#endif
+
+BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE_BEGIN
+/*! An erased-mutable status code suitably large for all the system codes
+which can be returned on this system.
+
+For Windows, these might be:
+
+ - `com_code` (`HRESULT`) [you need to include "com_code.hpp" explicitly for this]
+ - `nt_code` (`LONG`)
+ - `win32_code` (`DWORD`)
+
+For POSIX, `posix_code` is possible.
+
+You are guaranteed that `system_code` can be transported by the compiler
+in exactly two CPU registers.
+*/
+using system_code = status_code<erased<intptr_t>>;
+
+#ifndef NDEBUG
+static_assert(sizeof(system_code) == 2 * sizeof(void *), "system_code is not exactly two pointers in size!");
+static_assert(traits::is_move_relocating<system_code>::value, "system_code is not move relocating!");
+#endif
+
+BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE_END
+
+#endif