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+/* 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