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- /* Policies for result and outcome
- (C) 2017-2019 Niall Douglas <http://www.nedproductions.biz/> (6 commits) and Andrzej Krzemieński <akrzemi1@gmail.com> (1 commit)
- File Created: Oct 2017
- 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_POLICY_BASE_HPP
- #define BOOST_OUTCOME_POLICY_BASE_HPP
- #include "../config.hpp"
- #include <cassert>
- BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
- namespace policy
- {
- /*! AWAITING HUGO JSON CONVERSION TOOL
- SIGNATURE NOT RECOGNISED
- */
- struct base
- {
- protected:
- template <class Impl>
- static constexpr
- #ifdef _MSC_VER
- __declspec(noreturn)
- #elif defined(__GNUC__) || defined(__clang__)
- __attribute__((noreturn))
- #endif
- void _ub(Impl && /*unused*/)
- {
- assert(false); // NOLINT
- #if defined(__GNUC__) || defined(__clang__)
- __builtin_unreachable();
- #elif defined(_MSC_VER)
- __assume(0);
- #endif
- }
- template <class Impl> static constexpr bool _has_value(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_value) != 0; }
- template <class Impl> static constexpr bool _has_error(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0; }
- template <class Impl> static constexpr bool _has_exception(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_exception) != 0; }
- template <class Impl> static constexpr bool _has_error_is_errno(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_error_is_errno) != 0; }
- template <class Impl> static constexpr void _set_has_value(Impl &&self, bool v) noexcept { v ? self._state._status |= BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_value : self._state._status &= ~BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_value; }
- template <class Impl> static constexpr void _set_has_error(Impl &&self, bool v) noexcept { v ? self._state._status |= BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_error : self._state._status &= ~BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_error; }
- template <class Impl> static constexpr void _set_has_exception(Impl &&self, bool v) noexcept { v ? self._state._status |= BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_exception : self._state._status &= ~BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_exception; }
- template <class Impl> static constexpr void _set_has_error_is_errno(Impl &&self, bool v) noexcept { v ? self._state._status |= BOOST_OUTCOME_V2_NAMESPACE::detail::status_error_is_errno : self._state._status &= ~BOOST_OUTCOME_V2_NAMESPACE::detail::status_error_is_errno; }
- template <class Impl> static constexpr auto &&_value(Impl &&self) noexcept { return static_cast<Impl &&>(self)._state._value; }
- template <class Impl> static constexpr auto &&_error(Impl &&self) noexcept { return static_cast<Impl &&>(self)._error; }
- public:
- template <class R, class S, class P, class NoValuePolicy, class Impl> static inline constexpr auto &&_exception(Impl &&self) noexcept;
- template <class Impl> static constexpr void narrow_value_check(Impl &&self) noexcept
- {
- if(!_has_value(self))
- {
- _ub(self);
- }
- }
- template <class Impl> static constexpr void narrow_error_check(Impl &&self) noexcept
- {
- if(!_has_error(self))
- {
- _ub(self);
- }
- }
- template <class Impl> static constexpr void narrow_exception_check(Impl &&self) noexcept
- {
- if(!_has_exception(self))
- {
- _ub(self);
- }
- }
- };
- } // namespace policy
- BOOST_OUTCOME_V2_NAMESPACE_END
- #endif
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