1/* Tries to convert an exception ptr into its equivalent error code
2(C) 2017-2024 Niall Douglas <http://www.nedproductions.biz/> (11 commits)
3File Created: July 2017
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
20a source language processor.
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_UTILS_HPP
32#define BOOST_OUTCOME_UTILS_HPP
33
34#include "config.hpp"
35
36#include <exception>
37#include <string>
38#include <system_error>
39
40BOOST_OUTCOME_V2_NAMESPACE_BEGIN
41
42#ifndef BOOST_NO_EXCEPTIONS
43/*! AWAITING HUGO JSON CONVERSION TOOL
44SIGNATURE NOT RECOGNISED
45*/
46inline std::error_code error_from_exception(std::exception_ptr &&ep = std::current_exception(), std::error_code not_matched = std::make_error_code(e: std::errc::resource_unavailable_try_again)) noexcept
47{
48 if(!ep)
49 {
50 return {};
51 }
52 try
53 {
54 std::rethrow_exception(ep);
55 }
56 catch(const std::invalid_argument & /*unused*/)
57 {
58 ep = std::exception_ptr();
59 return std::make_error_code(e: std::errc::invalid_argument);
60 }
61 catch(const std::domain_error & /*unused*/)
62 {
63 ep = std::exception_ptr();
64 return std::make_error_code(e: std::errc::argument_out_of_domain);
65 }
66 catch(const std::length_error & /*unused*/)
67 {
68 ep = std::exception_ptr();
69 return std::make_error_code(e: std::errc::argument_list_too_long);
70 }
71 catch(const std::out_of_range & /*unused*/)
72 {
73 ep = std::exception_ptr();
74 return std::make_error_code(e: std::errc::result_out_of_range);
75 }
76 catch(const std::logic_error & /*unused*/) /* base class for this group */
77 {
78 ep = std::exception_ptr();
79 return std::make_error_code(e: std::errc::invalid_argument);
80 }
81 catch(const std::system_error &e) /* also catches ios::failure */
82 {
83 ep = std::exception_ptr();
84 return e.code();
85 }
86 catch(const std::overflow_error & /*unused*/)
87 {
88 ep = std::exception_ptr();
89 return std::make_error_code(e: std::errc::value_too_large);
90 }
91 catch(const std::range_error & /*unused*/)
92 {
93 ep = std::exception_ptr();
94 return std::make_error_code(e: std::errc::result_out_of_range);
95 }
96 catch(const std::runtime_error & /*unused*/) /* base class for this group */
97 {
98 ep = std::exception_ptr();
99 return std::make_error_code(e: std::errc::resource_unavailable_try_again);
100 }
101 catch(const std::bad_alloc & /*unused*/)
102 {
103 ep = std::exception_ptr();
104 return std::make_error_code(e: std::errc::not_enough_memory);
105 }
106 catch(...)
107 {
108 }
109 return not_matched;
110}
111
112/*! AWAITING HUGO JSON CONVERSION TOOL
113SIGNATURE NOT RECOGNISED
114*/
115inline void try_throw_std_exception_from_error(std::error_code ec, const std::string &msg = std::string{})
116{
117 if(!ec || (ec.category() != std::generic_category()
118#ifndef _WIN32
119 && ec.category() != std::system_category()
120#endif
121 ))
122 {
123 return;
124 }
125 switch(ec.value())
126 {
127 case EINVAL:
128 throw msg.empty() ? std::invalid_argument("invalid argument") : std::invalid_argument(msg);
129 case EDOM:
130 throw msg.empty() ? std::domain_error("domain error") : std::domain_error(msg);
131 case E2BIG:
132 throw msg.empty() ? std::length_error("length error") : std::length_error(msg);
133 case ERANGE:
134 throw msg.empty() ? std::out_of_range("out of range") : std::out_of_range(msg);
135 case EOVERFLOW:
136 throw msg.empty() ? std::overflow_error("overflow error") : std::overflow_error(msg);
137 case ENOMEM:
138 throw std::bad_alloc();
139 }
140}
141#endif
142
143BOOST_OUTCOME_V2_NAMESPACE_END
144
145#endif
146

source code of boost/libs/outcome/include/boost/outcome/utils.hpp