1/* Traits for Outcome
2(C) 2018-2024 Niall Douglas <http://www.nedproductions.biz/> (3 commits)
3File Created: March 2018
4
5
6Boost Software License - Version 1.0 - August 17th, 2003
7
8Permission is hereby granted, free of charge, to any person or organization
9obtaining a copy of the software and accompanying documentation covered by
10this license (the "Software") to use, reproduce, display, distribute,
11execute, and transmit the Software, and to prepare derivative works of the
12Software, and to permit third-parties to whom the Software is furnished to
13do so, all subject to the following:
14
15The copyright notices in the Software and this entire statement, including
16the above license grant, this restriction and the following disclaimer,
17must be included in all copies of the Software, in whole or in part, and
18all derivative works of the Software, unless such copies or derivative
19works are solely in the form of machine-executable object code generated by
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21
22THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
25SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
26FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
27ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28DEALINGS IN THE SOFTWARE.
29*/
30
31#ifndef BOOST_OUTCOME_TRAIT_STD_EXCEPTION_HPP
32#define BOOST_OUTCOME_TRAIT_STD_EXCEPTION_HPP
33
34#include "../config.hpp"
35
36#include <exception>
37
38BOOST_OUTCOME_V2_NAMESPACE_BEGIN
39
40namespace policy
41{
42 namespace detail
43 {
44 /* Pass through `make_exception_ptr` function for `std::exception_ptr`.
45 */
46 inline std::exception_ptr make_exception_ptr(std::exception_ptr v) { return v; }
47
48 // Try ADL, if not use fall backs above
49 template <class T> constexpr inline decltype(auto) exception_ptr(T &&v) { return make_exception_ptr(std::forward<T>(v)); }
50 } // namespace detail
51
52 /*! AWAITING HUGO JSON CONVERSION TOOL
53SIGNATURE NOT RECOGNISED
54*/
55 template <class T> constexpr inline decltype(auto) exception_ptr(T &&v) { return detail::exception_ptr(std::forward<T>(v)); }
56
57 namespace detail
58 {
59 template <bool has_error_payload> struct _rethrow_exception
60 {
61 template <class Exception> explicit _rethrow_exception(Exception && /*unused*/) // NOLINT
62 {
63 }
64 };
65 template <> struct _rethrow_exception<true>
66 {
67 template <class Exception> explicit _rethrow_exception(Exception &&excpt) // NOLINT
68 {
69 // ADL
70 rethrow_exception(policy::exception_ptr(std::forward<Exception>(excpt)));
71 }
72 };
73 } // namespace detail
74} // namespace policy
75
76namespace trait
77{
78 namespace detail
79 {
80 // Shortcut this for lower build impact
81 template <> struct _is_exception_ptr_available<std::exception_ptr>
82 {
83 static constexpr bool value = true;
84 using type = std::exception_ptr;
85 };
86 } // namespace detail
87
88 // std::exception_ptr is an error type
89 template <> struct is_error_type<std::exception_ptr>
90 {
91 static constexpr bool value = true;
92 };
93
94} // namespace trait
95
96BOOST_OUTCOME_V2_NAMESPACE_END
97
98#endif
99

source code of boost/libs/outcome/include/boost/outcome/detail/trait_std_exception.hpp