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Diffstat (limited to 'boost/outcome/experimental/status-code/system_code.hpp')
-rw-r--r-- | boost/outcome/experimental/status-code/system_code.hpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/boost/outcome/experimental/status-code/system_code.hpp b/boost/outcome/experimental/status-code/system_code.hpp new file mode 100644 index 0000000000..2b889240cf --- /dev/null +++ b/boost/outcome/experimental/status-code/system_code.hpp @@ -0,0 +1,66 @@ +/* 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 |