ceph/src/boost/boost/outcome/policy/result_error_code_throw_as_system_error.hpp

   1 /* Policies for result and outcome
   2 (C) 2017-2020 Niall Douglas <http://www.nedproductions.biz/> (8 commits)
   3 File Created: Oct 2017
   4
   5
   6 Boost Software License - Version 1.0 - August 17th, 2003
   7
   8 Permission is hereby granted, free of charge, to any person or organization
   9 obtaining a copy of the software and accompanying documentation covered by
  10 this license (the "Software") to use, reproduce, display, distribute,
  11 execute, and transmit the Software, and to prepare derivative works of the
  12 Software, and to permit third-parties to whom the Software is furnished to
  13 do so, all subject to the following:
  14
  15 The copyright notices in the Software and this entire statement, including
  16 the above license grant, this restriction and the following disclaimer,
  17 must be included in all copies of the Software, in whole or in part, and
  18 all derivative works of the Software, unless such copies or derivative
  19 works are solely in the form of machine-executable object code generated by
  20 a source language processor.
  21
  22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  25 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  26 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  27 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  28 DEALINGS IN THE SOFTWARE.
  29 */
  30
  31 #ifndef BOOST_OUTCOME_POLICY_RESULT_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP
  32 #define BOOST_OUTCOME_POLICY_RESULT_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP
  33
  34 #include "../bad_access.hpp"
  35 #include "base.hpp"
  36
  37 #include <system_error>
  38
  39 BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
  40
  41 namespace policy
  42 {
  43   template <class T, class EC, class E> struct error_code_throw_as_system_error;
  44   /*! AWAITING HUGO JSON CONVERSION TOOL
  45 SIGNATURE NOT RECOGNISED
  46 */
  47   template <class T, class EC> struct error_code_throw_as_system_error<T, EC, void> : base
  48   {
  49     template <class Impl> static constexpr void wide_value_check(Impl &&self)
  50     {
  51       if(!base::_has_value(std::forward<Impl>(self)))
  52       {
  53         if(base::_has_error(std::forward<Impl>(self)))
  54         {
  55           // ADL discovered
  56           outcome_throw_as_system_error_with_payload(base::_error(std::forward<Impl>(self)));
  57         }
  58         BOOST_OUTCOME_THROW_EXCEPTION(bad_result_access("no value"));  // NOLINT
  59       }
  60     }
  61     template <class Impl> static constexpr void wide_error_check(Impl &&self)
  62     {
  63       if(!base::_has_error(std::forward<Impl>(self)))
  64       {
  65         BOOST_OUTCOME_THROW_EXCEPTION(bad_result_access("no error"));  // NOLINT
  66       }
  67     }
  68   };
  69 }  // namespace policy
  70
  71 BOOST_OUTCOME_V2_NAMESPACE_END
  72
  73 #endif