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@@ -1,5 +1,5 @@
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/* Policies for result and outcome
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(C) 2017-2019 Niall Douglas <http://www.nedproductions.biz/> (59 commits)
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(C) 2017-2023 Niall Douglas <http://www.nedproductions.biz/> (6 commits) and Andrzej Krzemieński <akrzemi1@gmail.com> (1 commit)
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File Created: Oct 2017
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@@ -31,72 +31,192 @@ DEALINGS IN THE SOFTWARE.
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#ifndef BOOST_OUTCOME_POLICY_BASE_HPP
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#define BOOST_OUTCOME_POLICY_BASE_HPP
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#include "../config.hpp"
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#include <cassert>
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#include "../detail/value_storage.hpp"
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BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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namespace hooks
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{
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U> constexpr inline void hook_result_construction(T * /*unused*/, U && /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U> constexpr inline void hook_result_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U> constexpr inline void hook_result_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U, class... Args>
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constexpr inline void hook_result_in_place_construction(T * /*unused*/, in_place_type_t<U> /*unused*/, Args &&... /*unused*/) noexcept
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{
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class... U> constexpr inline void hook_outcome_construction(T * /*unused*/, U &&... /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U> constexpr inline void hook_outcome_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U> constexpr inline void hook_outcome_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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template <class T, class U, class... Args>
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constexpr inline void hook_outcome_in_place_construction(T * /*unused*/, in_place_type_t<U> /*unused*/, Args &&... /*unused*/) noexcept
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{
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}
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} // namespace hooks
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#endif
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namespace policy
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{
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/*! AWAITING HUGO JSON CONVERSION TOOL
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namespace detail
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{
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using BOOST_OUTCOME_V2_NAMESPACE::detail::make_ub;
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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struct base
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{
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template <class... Args> static constexpr void _silence_unused(Args &&... /*unused*/) noexcept {}
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protected:
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template <class Impl>
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static constexpr
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#ifdef _MSC_VER
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__declspec(noreturn)
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#elif defined(__GNUC__) || defined(__clang__)
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__attribute__((noreturn))
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#endif
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void _ub(Impl && /*unused*/)
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{
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assert(false); // NOLINT
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#if defined(__GNUC__) || defined(__clang__)
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__builtin_unreachable();
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#elif defined(_MSC_VER)
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__assume(0);
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#endif
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}
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template <class Impl> static constexpr void _make_ub(Impl &&self) noexcept { return detail::make_ub(static_cast<Impl &&>(self)); }
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template <class Impl> static constexpr bool _has_value(Impl &&self) noexcept { return self._state._status.have_value(); }
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template <class Impl> static constexpr bool _has_error(Impl &&self) noexcept { return self._state._status.have_error(); }
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template <class Impl> static constexpr bool _has_exception(Impl &&self) noexcept { return self._state._status.have_exception(); }
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template <class Impl> static constexpr bool _has_error_is_errno(Impl &&self) noexcept { return self._state._status.have_error_is_errno(); }
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template <class Impl> static constexpr bool _has_value(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_value) != 0; }
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template <class Impl> static constexpr bool _has_error(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0; }
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template <class Impl> static constexpr bool _has_exception(Impl &&self) noexcept { return (self._state._status & BOOST_OUTCOME_V2_NAMESPACE::detail::status_have_exception) != 0; }
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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; }
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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; }
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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; }
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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; }
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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; }
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template <class Impl> static constexpr void _set_has_value(Impl &&self, bool v) noexcept { self._state._status.set_have_value(v); }
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template <class Impl> static constexpr void _set_has_error(Impl &&self, bool v) noexcept { self._state._status.set_have_error(v); }
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template <class Impl> static constexpr void _set_has_exception(Impl &&self, bool v) noexcept { self._state._status.set_have_exception(v); }
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template <class Impl> static constexpr void _set_has_error_is_errno(Impl &&self, bool v) noexcept { self._state._status.set_have_error_is_errno(v); }
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template <class Impl> static constexpr auto &&_value(Impl &&self) noexcept { return static_cast<Impl &&>(self)._state._value; }
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template <class Impl> static constexpr auto &&_error(Impl &&self) noexcept { return static_cast<Impl &&>(self)._error; }
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template <class Impl> static constexpr auto &&_error(Impl &&self) noexcept { return static_cast<Impl &&>(self)._state._error; }
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public:
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template <class R, class S, class P, class NoValuePolicy, class Impl> static inline constexpr auto &&_exception(Impl &&self) noexcept;
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template <class T, class U> static constexpr inline void on_result_construction(T *inst, U &&v) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_result_construction(inst, static_cast<U &&>(v));
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#else
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(void) inst;
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(void) v;
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#endif
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}
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template <class T, class U> static constexpr inline void on_result_copy_construction(T *inst, U &&v) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_result_copy_construction(inst, static_cast<U &&>(v));
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#else
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(void) inst;
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(void) v;
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#endif
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}
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template <class T, class U> static constexpr inline void on_result_move_construction(T *inst, U &&v) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_result_move_construction(inst, static_cast<U &&>(v));
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#else
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(void) inst;
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(void) v;
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#endif
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}
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template <class T, class U, class... Args>
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static constexpr inline void on_result_in_place_construction(T *inst, in_place_type_t<U> _, Args &&... args) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_result_in_place_construction(inst, _, static_cast<Args &&>(args)...);
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#else
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(void) inst;
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(void) _;
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_silence_unused(static_cast<Args &&>(args)...);
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#endif
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}
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template <class T, class... U> static constexpr inline void on_outcome_construction(T *inst, U &&... args) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_outcome_construction(inst, static_cast<U &&>(args)...);
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#else
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(void) inst;
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_silence_unused(static_cast<U &&>(args)...);
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#endif
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}
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template <class T, class U> static constexpr inline void on_outcome_copy_construction(T *inst, U &&v) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_outcome_copy_construction(inst, static_cast<U &&>(v));
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#else
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(void) inst;
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(void) v;
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#endif
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}
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template <class T, class U> static constexpr inline void on_outcome_move_construction(T *inst, U &&v) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_outcome_move_construction(inst, static_cast<U &&>(v));
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#else
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(void) inst;
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(void) v;
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#endif
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}
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template <class T, class U, class... Args>
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static constexpr inline void on_outcome_in_place_construction(T *inst, in_place_type_t<U> _, Args &&... args) noexcept
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{
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#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
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using namespace hooks;
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hook_outcome_in_place_construction(inst, _, static_cast<Args &&>(args)...);
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#else
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(void) inst;
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(void) _;
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_silence_unused(static_cast<Args &&>(args)...);
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#endif
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}
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template <class Impl> static constexpr void narrow_value_check(Impl &&self) noexcept
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{
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if(!_has_value(self))
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{
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_ub(self);
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_make_ub(self);
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}
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}
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template <class Impl> static constexpr void narrow_error_check(Impl &&self) noexcept
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{
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if(!_has_error(self))
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{
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_ub(self);
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_make_ub(self);
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}
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}
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template <class Impl> static constexpr void narrow_exception_check(Impl &&self) noexcept
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{
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if(!_has_exception(self))
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{
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_ub(self);
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_make_ub(self);
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}
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}
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};
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