228 lines
8.7 KiB
C++
228 lines
8.7 KiB
C++
/* Policies for result and outcome
|
|
(C) 2017-2022 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 "../detail/value_storage.hpp"
|
|
|
|
BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
|
|
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
namespace hooks
|
|
{
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U> constexpr inline void hook_result_construction(T * /*unused*/, U && /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U> constexpr inline void hook_result_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U> constexpr inline void hook_result_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U, class... Args>
|
|
constexpr inline void hook_result_in_place_construction(T * /*unused*/, in_place_type_t<U> /*unused*/, Args &&... /*unused*/) noexcept
|
|
{
|
|
}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class... U> constexpr inline void hook_outcome_construction(T * /*unused*/, U &&... /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U> constexpr inline void hook_outcome_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U> constexpr inline void hook_outcome_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
template <class T, class U, class... Args>
|
|
constexpr inline void hook_outcome_in_place_construction(T * /*unused*/, in_place_type_t<U> /*unused*/, Args &&... /*unused*/) noexcept
|
|
{
|
|
}
|
|
} // namespace hooks
|
|
#endif
|
|
|
|
namespace policy
|
|
{
|
|
namespace detail
|
|
{
|
|
using BOOST_OUTCOME_V2_NAMESPACE::detail::make_ub;
|
|
}
|
|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
|
SIGNATURE NOT RECOGNISED
|
|
*/
|
|
struct base
|
|
{
|
|
template <class... Args> static constexpr void _silence_unused(Args &&... /*unused*/) noexcept {}
|
|
protected:
|
|
template <class Impl> static constexpr void _make_ub(Impl &&self) noexcept { return detail::make_ub(static_cast<Impl &&>(self)); }
|
|
template <class Impl> static constexpr bool _has_value(Impl &&self) noexcept { return self._state._status.have_value(); }
|
|
template <class Impl> static constexpr bool _has_error(Impl &&self) noexcept { return self._state._status.have_error(); }
|
|
template <class Impl> static constexpr bool _has_exception(Impl &&self) noexcept { return self._state._status.have_exception(); }
|
|
template <class Impl> static constexpr bool _has_error_is_errno(Impl &&self) noexcept { return self._state._status.have_error_is_errno(); }
|
|
|
|
template <class Impl> static constexpr void _set_has_value(Impl &&self, bool v) noexcept { self._state._status.set_have_value(v); }
|
|
template <class Impl> static constexpr void _set_has_error(Impl &&self, bool v) noexcept { self._state._status.set_have_error(v); }
|
|
template <class Impl> static constexpr void _set_has_exception(Impl &&self, bool v) noexcept { self._state._status.set_have_exception(v); }
|
|
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); }
|
|
|
|
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)._state._error; }
|
|
|
|
public:
|
|
template <class R, class S, class P, class NoValuePolicy, class Impl> static inline constexpr auto &&_exception(Impl &&self) noexcept;
|
|
|
|
template <class T, class U> static constexpr inline void on_result_construction(T *inst, U &&v) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_result_construction(inst, static_cast<U &&>(v));
|
|
#else
|
|
(void) inst;
|
|
(void) v;
|
|
#endif
|
|
}
|
|
template <class T, class U> static constexpr inline void on_result_copy_construction(T *inst, U &&v) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_result_copy_construction(inst, static_cast<U &&>(v));
|
|
#else
|
|
(void) inst;
|
|
(void) v;
|
|
#endif
|
|
}
|
|
template <class T, class U> static constexpr inline void on_result_move_construction(T *inst, U &&v) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_result_move_construction(inst, static_cast<U &&>(v));
|
|
#else
|
|
(void) inst;
|
|
(void) v;
|
|
#endif
|
|
}
|
|
template <class T, class U, class... Args>
|
|
static constexpr inline void on_result_in_place_construction(T *inst, in_place_type_t<U> _, Args &&... args) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_result_in_place_construction(inst, _, static_cast<Args &&>(args)...);
|
|
#else
|
|
(void) inst;
|
|
(void) _;
|
|
_silence_unused(static_cast<Args &&>(args)...);
|
|
#endif
|
|
}
|
|
|
|
template <class T, class... U> static constexpr inline void on_outcome_construction(T *inst, U &&... args) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_outcome_construction(inst, static_cast<U &&>(args)...);
|
|
#else
|
|
(void) inst;
|
|
_silence_unused(static_cast<U &&>(args)...);
|
|
#endif
|
|
}
|
|
template <class T, class U> static constexpr inline void on_outcome_copy_construction(T *inst, U &&v) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_outcome_copy_construction(inst, static_cast<U &&>(v));
|
|
#else
|
|
(void) inst;
|
|
(void) v;
|
|
#endif
|
|
}
|
|
template <class T, class U> static constexpr inline void on_outcome_move_construction(T *inst, U &&v) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_outcome_move_construction(inst, static_cast<U &&>(v));
|
|
#else
|
|
(void) inst;
|
|
(void) v;
|
|
#endif
|
|
}
|
|
template <class T, class U, class... Args>
|
|
static constexpr inline void on_outcome_in_place_construction(T *inst, in_place_type_t<U> _, Args &&... args) noexcept
|
|
{
|
|
#if BOOST_OUTCOME_ENABLE_LEGACY_SUPPORT_FOR < 220
|
|
using namespace hooks;
|
|
hook_outcome_in_place_construction(inst, _, static_cast<Args &&>(args)...);
|
|
#else
|
|
(void) inst;
|
|
(void) _;
|
|
_silence_unused(static_cast<Args &&>(args)...);
|
|
#endif
|
|
}
|
|
|
|
template <class Impl> static constexpr void narrow_value_check(Impl &&self) noexcept
|
|
{
|
|
if(!_has_value(self))
|
|
{
|
|
_make_ub(self);
|
|
}
|
|
}
|
|
template <class Impl> static constexpr void narrow_error_check(Impl &&self) noexcept
|
|
{
|
|
if(!_has_error(self))
|
|
{
|
|
_make_ub(self);
|
|
}
|
|
}
|
|
template <class Impl> static constexpr void narrow_exception_check(Impl &&self) noexcept
|
|
{
|
|
if(!_has_exception(self))
|
|
{
|
|
_make_ub(self);
|
|
}
|
|
}
|
|
};
|
|
} // namespace policy
|
|
|
|
BOOST_OUTCOME_V2_NAMESPACE_END
|
|
|
|
#endif
|