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Diffstat (limited to 'boost/outcome/utils.hpp')
-rw-r--r-- | boost/outcome/utils.hpp | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/boost/outcome/utils.hpp b/boost/outcome/utils.hpp new file mode 100644 index 0000000000..2a7da2ef1a --- /dev/null +++ b/boost/outcome/utils.hpp @@ -0,0 +1,144 @@ +/* Tries to convert an exception ptr into its equivalent error code +(C) 2017-2019 Niall Douglas <http://www.nedproductions.biz/> (59 commits) +File Created: July 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_UTILS_HPP +#define BOOST_OUTCOME_UTILS_HPP + +#include "config.hpp" + +#include <exception> +#include <system_error> + +BOOST_OUTCOME_V2_NAMESPACE_BEGIN + +#ifndef BOOST_NO_EXCEPTIONS +/*! AWAITING HUGO JSON CONVERSION TOOL +SIGNATURE NOT RECOGNISED +*/ +inline std::error_code error_from_exception(std::exception_ptr &&ep = std::current_exception(), std::error_code not_matched = std::make_error_code(std::errc::resource_unavailable_try_again)) noexcept +{ + if(!ep) + { + return {}; + } + try + { + std::rethrow_exception(ep); + } + catch(const std::invalid_argument & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::invalid_argument); + } + catch(const std::domain_error & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::argument_out_of_domain); + } + catch(const std::length_error & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::argument_list_too_long); + } + catch(const std::out_of_range & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::result_out_of_range); + } + catch(const std::logic_error & /*unused*/) /* base class for this group */ + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::invalid_argument); + } + catch(const std::system_error &e) /* also catches ios::failure */ + { + ep = std::exception_ptr(); + return e.code(); + } + catch(const std::overflow_error & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::value_too_large); + } + catch(const std::range_error & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::result_out_of_range); + } + catch(const std::runtime_error & /*unused*/) /* base class for this group */ + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::resource_unavailable_try_again); + } + catch(const std::bad_alloc & /*unused*/) + { + ep = std::exception_ptr(); + return std::make_error_code(std::errc::not_enough_memory); + } + catch(...) + { + } + return not_matched; +} + +/*! AWAITING HUGO JSON CONVERSION TOOL +SIGNATURE NOT RECOGNISED +*/ +inline void try_throw_std_exception_from_error(std::error_code ec, const std::string &msg = std::string{}) +{ + if(!ec || (ec.category() != std::generic_category() +#ifndef _WIN32 + && ec.category() != std::system_category() +#endif + )) + { + return; + } + switch(ec.value()) + { + case EINVAL: + throw msg.empty() ? std::invalid_argument("invalid argument") : std::invalid_argument(msg); + case EDOM: + throw msg.empty() ? std::domain_error("domain error") : std::domain_error(msg); + case E2BIG: + throw msg.empty() ? std::length_error("length error") : std::length_error(msg); + case ERANGE: + throw msg.empty() ? std::out_of_range("out of range") : std::out_of_range(msg); + case EOVERFLOW: + throw msg.empty() ? std::overflow_error("overflow error") : std::overflow_error(msg); + case ENOMEM: + throw std::bad_alloc(); + } +} +#endif + +BOOST_OUTCOME_V2_NAMESPACE_END + +#endif |