105 lines
5.9 KiB
C++
105 lines
5.9 KiB
C++
/* Exception observers for outcome type
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(C) 2017-2024 Niall Douglas <http://www.nedproductions.biz/> (6 commits)
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File Created: Oct 2017
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#ifndef BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_IMPL_HPP
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#define BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_IMPL_HPP
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#include "basic_outcome_exception_observers.hpp"
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#include "../policy/base.hpp"
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BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
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namespace policy
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{
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template <class R, class S, class P, class NoValuePolicy, class Impl> inline constexpr auto &&base::_exception(Impl &&self) noexcept
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{
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// Impl will be some internal implementation class which has no knowledge of the _ptr stored
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// beneath it. So statically cast, preserving rvalue and constness, to the derived class.
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using Outcome = BOOST_OUTCOME_V2_NAMESPACE::detail::rebind_type<basic_outcome<R, S, P, NoValuePolicy>, decltype(self)>;
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#if defined(_MSC_VER) && _MSC_VER < 1920
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// VS2017 tries a copy construction in the correct implementation despite that Outcome is always a rvalue or lvalue ref! :(
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basic_outcome<R, S, P, NoValuePolicy> &_self = (basic_outcome<R, S, P, NoValuePolicy> &) (self); // NOLINT
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#else
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Outcome _self = static_cast<Outcome>(self); // NOLINT
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#endif
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return static_cast<Outcome>(_self)._ptr;
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}
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} // namespace policy
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namespace detail
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{
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::assume_exception() & noexcept
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{
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NoValuePolicy::narrow_exception_check(*this);
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(*this);
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr const typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::assume_exception() const &noexcept
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{
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NoValuePolicy::narrow_exception_check(*this);
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(*this);
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &&basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::assume_exception() && noexcept
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{
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NoValuePolicy::narrow_exception_check(std::move(*this));
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(std::move(*this));
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr const typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &&basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::assume_exception() const &&noexcept
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{
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NoValuePolicy::narrow_exception_check(std::move(*this));
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(std::move(*this));
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception() &
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{
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NoValuePolicy::wide_exception_check(*this);
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(*this);
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr const typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception() const &
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{
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NoValuePolicy::wide_exception_check(*this);
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(*this);
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &&basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception() &&
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{
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NoValuePolicy::wide_exception_check(std::move(*this));
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(std::move(*this));
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}
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template <class Base, class R, class S, class P, class NoValuePolicy> inline constexpr const typename basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception_type &&basic_outcome_exception_observers<Base, R, S, P, NoValuePolicy>::exception() const &&
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{
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NoValuePolicy::wide_exception_check(std::move(*this));
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return NoValuePolicy::template _exception<R, S, P, NoValuePolicy>(std::move(*this));
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}
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} // namespace detail
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BOOST_OUTCOME_V2_NAMESPACE_END
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#endif
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