99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
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/* Traits for Outcome
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(C) 2018-2022 Niall Douglas <http://www.nedproductions.biz/> (3 commits)
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File Created: March 2018
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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_TRAIT_STD_EXCEPTION_HPP
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#define BOOST_OUTCOME_TRAIT_STD_EXCEPTION_HPP
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#include "../config.hpp"
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#include <exception>
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BOOST_OUTCOME_V2_NAMESPACE_BEGIN
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namespace policy
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{
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namespace detail
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{
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/* Pass through `make_exception_ptr` function for `std::exception_ptr`.
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*/
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inline std::exception_ptr make_exception_ptr(std::exception_ptr v) { return v; }
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// Try ADL, if not use fall backs above
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template <class T> constexpr inline decltype(auto) exception_ptr(T &&v) { return make_exception_ptr(std::forward<T>(v)); }
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} // namespace detail
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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> constexpr inline decltype(auto) exception_ptr(T &&v) { return detail::exception_ptr(std::forward<T>(v)); }
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namespace detail
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{
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template <bool has_error_payload> struct _rethrow_exception
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{
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template <class Exception> explicit _rethrow_exception(Exception && /*unused*/) // NOLINT
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{
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}
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};
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template <> struct _rethrow_exception<true>
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{
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template <class Exception> explicit _rethrow_exception(Exception &&excpt) // NOLINT
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{
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// ADL
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rethrow_exception(policy::exception_ptr(std::forward<Exception>(excpt)));
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}
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};
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} // namespace detail
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} // namespace policy
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namespace trait
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{
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namespace detail
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{
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// Shortcut this for lower build impact
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template <> struct _is_exception_ptr_available<std::exception_ptr>
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{
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static constexpr bool value = true;
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using type = std::exception_ptr;
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};
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} // namespace detail
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// std::exception_ptr is an error type
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template <> struct is_error_type<std::exception_ptr>
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{
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static constexpr bool value = true;
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};
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} // namespace trait
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BOOST_OUTCOME_V2_NAMESPACE_END
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#endif
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