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This code example is from the tutorial\n// https://ned14.github.io/outcome/tutorial/payload/copy_file2/\n\n#include \"outcome.hpp\"\n#include \n\nnamespace outcome = OUTCOME_V2_NAMESPACE;\n\nnamespace filesystem2\n{\n using std::experimental::filesystem::path;\n using std::experimental::filesystem::filesystem_error;\n\n // Error code + paths related to a failure. Also causes ADL discovery to check this namespace.\n struct failure_info\n {\n std::error_code ec;\n path path1, path2;\n };\n\n // Tell Outcome that failure_info is to be treated as a std::error_code\n inline const std::error_code &make_error_code(const failure_info &fi) { return fi.ec; }\n\n // Localise an outcome implementation specific to this namespace. Normally would just\n // be `result`, but for clarity we'll use `fs_result`.\n template using fs_result = outcome::result;\n\n /*! Copies the file at path `from` to path `to`.\n \\returns Successful if file was successfully copied, otherwise the error code reported\n by the operating system plus a payload of the paths involved.\n \\throws Never throws.\n */\n fs_result copy_file(const path &from, const path &to) noexcept { return failure_info{make_error_code(std::errc::no_such_file_or_directory), from, to}; }\n\n // If we would like Outcome to do something other than the default action (see next\n // section), we can declare this ADL discovered free function to customise what\n // to do instead.\n //\n // Note that rvalue semantics are propagated internally by Outcome, so if the user\n // called .value() on a rvalued result, failure_info will be moved rather than\n // copied from the result. That means we can overload once with value semantics,\n // and not need to overload for lvalue and rvalue situations unless we really feel\n // we need to for some reason.\n inline void throw_as_system_error_with_payload(failure_info fi)\n {\n // If the error code is not filesystem related e.g. ENOMEM, throw that as a standard STL exception.\n outcome::try_throw_std_exception_from_error(fi.ec);\n // Throw the exact same filesystem_error exception which the throwing copy_file() edition does.\n throw filesystem_error(fi.ec.message(), std::move(fi.path1), std::move(fi.path2), fi.ec);\n }\n}\n\nint main()\n{\n // Non-throwing use case\n auto o = filesystem2::copy_file(\"dontexist\", \"alsodontexist\");\n if(!o)\n {\n std::cerr << \"Copy file failed with error \" << o.error().ec.message() //\n << \" (path1 = \" << o.error().path1 << \", path2 = \" << o.error().path2 << \")\" //\n << std::endl;\n }\n\n // Throwing use case\n try\n {\n // Try to observe the successful value, thus triggering default actions which invokes\n // our throw_as_system_error_with_payload() above which then throws filesystem_error\n // exactly like the Filesystem TS does for its throwing overload.\n filesystem2::copy_file(\"dontexist\", \"alsodontexist\").value();\n }\n catch(const filesystem2::filesystem_error &e)\n {\n std::cerr << \"Copy file failed with exception \" << e.what() //\n << \" (path1 = \" << e.path1() << \", path2 = \" << e.path2() << \")\" //\n << std::endl;\n }\n catch(const std::exception &e)\n {\n std::cerr << \"Copy file failed with exception \" << e.what() //\n << std::endl;\n }\n return 0;\n}\n","codes",[3388],{"_3389":3390,"_3384":3391},"file","outcome.hpp","/* iostream specialisations for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: July 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_IOSTREAM_SUPPORT_HPP\n#define OUTCOME_IOSTREAM_SUPPORT_HPP\n/* A less simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: June 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_OUTCOME_HPP\n#define OUTCOME_OUTCOME_HPP\n/* Exception observers for outcome type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_OUTCOME_EXCEPTION_OBSERVERS_HPP\n#define OUTCOME_OUTCOME_EXCEPTION_OBSERVERS_HPP\n/* Storage for a very simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_RESULT_STORAGE_HPP\n#define OUTCOME_RESULT_STORAGE_HPP\n/* Type sugar for success and failure\n(C) 2017 Niall Douglas (59 commits)\nFile Created: July 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_SUCCESS_FAILURE_HPP\n#define OUTCOME_SUCCESS_FAILURE_HPP\n/* Configure Outcome with QuickCppLib\n(C) 2015-2017 Niall Douglas (24 commits)\nFile Created: August 2015\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_V2_CONFIG_HPP\n#define OUTCOME_V2_CONFIG_HPP\n//! \\brief Major version for cmake and DLL version stamping \\ingroup config\n#define OUTCOME_VERSION_MAJOR 2\n//! \\brief Minor version for cmake and DLL version stamping \\ingroup config\n#define OUTCOME_VERSION_MINOR 0\n//! \\brief Patch version for cmake and DLL version stamping \\ingroup config\n#define OUTCOME_VERSION_PATCH 0\n//! \\brief Revision version for cmake and DLL version stamping \\ingroup config\n#define OUTCOME_VERSION_REVISION 0 // Revision version for cmake and DLL version stamping\n\n//! \\brief Defined between stable releases of Outcome. It means the inline namespace\n//! will be permuted per-commit to ensure ABI uniqueness. \\ingroup config\n#define OUTCOME_UNSTABLE_VERSION\n// Pull in detection of __MINGW64_VERSION_MAJOR\n#if defined(__MINGW32__) && !0\n#include <_mingw.h>\n#endif\n/* Configure QuickCppLib\n(C) 2016-2017 Niall Douglas (8 commits)\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef QUICKCPPLIB_CONFIG_HPP\n#define QUICKCPPLIB_CONFIG_HPP\n/* Provides SG-10 feature checking for all C++ compilers\n(C) 2014-2017 Niall Douglas (13 commits)\nFile Created: Nov 2014\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef QUICKCPPLIB_HAS_FEATURE_H\n#define QUICKCPPLIB_HAS_FEATURE_H\n\n#if __cplusplus >= 201103\n\n// Some of these macros ended up getting removed by ISO standards,\n// they are prefixed with ////\n////#if !defined(__cpp_alignas)\n////#define __cpp_alignas 190000\n////#endif\n////#if !defined(__cpp_default_function_template_args)\n////#define __cpp_default_function_template_args 190000\n////#endif\n////#if !defined(__cpp_defaulted_functions)\n////#define __cpp_defaulted_functions 190000\n////#endif\n////#if !defined(__cpp_deleted_functions)\n////#define __cpp_deleted_functions 190000\n////#endif\n////#if !defined(__cpp_generalized_initializers)\n////#define __cpp_generalized_initializers 190000\n////#endif\n////#if !defined(__cpp_implicit_moves)\n////#define __cpp_implicit_moves 190000\n////#endif\n////#if !defined(__cpp_inline_namespaces)\n////#define __cpp_inline_namespaces 190000\n////#endif\n////#if !defined(__cpp_local_type_template_args)\n////#define __cpp_local_type_template_args 190000\n////#endif\n////#if !defined(__cpp_noexcept)\n////#define __cpp_noexcept 190000\n////#endif\n////#if !defined(__cpp_nonstatic_member_init)\n////#define __cpp_nonstatic_member_init 190000\n////#endif\n////#if !defined(__cpp_nullptr)\n////#define __cpp_nullptr 190000\n////#endif\n////#if !defined(__cpp_override_control)\n////#define __cpp_override_control 190000\n////#endif\n////#if !defined(__cpp_thread_local)\n////#define __cpp_thread_local 190000\n////#endif\n////#if !defined(__cpp_auto_type)\n////#define __cpp_auto_type 190000\n////#endif\n////#if !defined(__cpp_strong_enums)\n////#define __cpp_strong_enums 190000\n////#endif\n////#if !defined(__cpp_trailing_return)\n////#define __cpp_trailing_return 190000\n////#endif\n////#if !defined(__cpp_unrestricted_unions)\n////#define __cpp_unrestricted_unions 190000\n////#endif\n\n#if !defined(__cpp_alias_templates)\n#define __cpp_alias_templates 190000\n#endif\n\n#if !defined(__cpp_attributes)\n#define __cpp_attributes 190000\n#endif\n\n#if !defined(__cpp_constexpr)\n#if __cplusplus >= 201402\n#define __cpp_constexpr 201304 // relaxed constexpr\n#else\n#define __cpp_constexpr 190000\n#endif\n#endif\n\n#if !defined(__cpp_decltype)\n#define __cpp_decltype 190000\n#endif\n\n#if !defined(__cpp_delegating_constructors)\n#define __cpp_delegating_constructors 190000\n#endif\n\n#if !defined(__cpp_explicit_conversion) //// renamed from __cpp_explicit_conversions\n#define __cpp_explicit_conversion 190000\n#endif\n\n#if !defined(__cpp_inheriting_constructors)\n#define __cpp_inheriting_constructors 190000\n#endif\n\n#if !defined(__cpp_initializer_lists) //// NEW\n#define __cpp_initializer_lists 190000\n#endif\n\n#if !defined(__cpp_lambdas)\n#define __cpp_lambdas 190000\n#endif\n\n#if !defined(__cpp_nsdmi)\n#define __cpp_nsdmi 190000 //// NEW\n#endif\n\n#if !defined(__cpp_range_based_for) //// renamed from __cpp_range_for\n#define __cpp_range_based_for 190000\n#endif\n\n#if !defined(__cpp_raw_strings)\n#define __cpp_raw_strings 190000\n#endif\n\n#if !defined(__cpp_ref_qualifiers) //// renamed from __cpp_reference_qualified_functions\n#define __cpp_ref_qualifiers 190000\n#endif\n\n#if !defined(__cpp_rvalue_references)\n#define __cpp_rvalue_references 190000\n#endif\n\n#if !defined(__cpp_static_assert)\n#define __cpp_static_assert 190000\n#endif\n\n#if !defined(__cpp_unicode_characters) //// NEW\n#define __cpp_unicode_characters 190000\n#endif\n\n#if !defined(__cpp_unicode_literals)\n#define __cpp_unicode_literals 190000\n#endif\n\n#if !defined(__cpp_user_defined_literals)\n#define __cpp_user_defined_literals 190000\n#endif\n\n#if !defined(__cpp_variadic_templates)\n#define __cpp_variadic_templates 190000\n#endif\n\n#endif\n\n#if __cplusplus >= 201402\n\n// Some of these macros ended up getting removed by ISO standards,\n// they are prefixed with ////\n////#if !defined(__cpp_contextual_conversions)\n////#define __cpp_contextual_conversions 190000\n////#endif\n////#if !defined(__cpp_digit_separators)\n////#define __cpp_digit_separators 190000\n////#endif\n////#if !defined(__cpp_relaxed_constexpr)\n////#define __cpp_relaxed_constexpr 190000\n////#endif\n////#if !defined(__cpp_runtime_arrays)\n////# define __cpp_runtime_arrays 190000\n////#endif\n\n\n#if !defined(__cpp_aggregate_nsdmi)\n#define __cpp_aggregate_nsdmi 190000\n#endif\n\n#if !defined(__cpp_binary_literals)\n#define __cpp_binary_literals 190000\n#endif\n\n#if !defined(__cpp_decltype_auto)\n#define __cpp_decltype_auto 190000\n#endif\n\n#if !defined(__cpp_generic_lambdas)\n#define __cpp_generic_lambdas 190000\n#endif\n\n#if !defined(__cpp_init_captures)\n#define __cpp_init_captures 190000\n#endif\n\n#if !defined(__cpp_return_type_deduction)\n#define __cpp_return_type_deduction 190000\n#endif\n\n#if !defined(__cpp_sized_deallocation)\n#define __cpp_sized_deallocation 190000\n#endif\n\n#if !defined(__cpp_variable_templates)\n#define __cpp_variable_templates 190000\n#endif\n\n#endif\n\n\n// VS2010: _MSC_VER=1600\n// VS2012: _MSC_VER=1700\n// VS2013: _MSC_VER=1800\n// VS2015: _MSC_VER=1900\n// VS2017: _MSC_VER=1910\n#if defined(_MSC_VER) && !defined(__clang__)\n\n#if !defined(__cpp_exceptions) && defined(_CPPUNWIND)\n#define __cpp_exceptions 190000\n#endif\n\n#if !defined(__cpp_rtti) && defined(_CPPRTTI)\n#define __cpp_rtti 190000\n#endif\n\n\n// C++ 11\n\n#if !defined(__cpp_alias_templates) && _MSC_VER >= 1800\n#define __cpp_alias_templates 190000\n#endif\n\n#if !defined(__cpp_attributes)\n#define __cpp_attributes 190000\n#endif\n\n#if !defined(__cpp_constexpr) && _MSC_FULL_VER >= 190023506 /* VS2015 */\n#define __cpp_constexpr 190000\n#endif\n\n#if !defined(__cpp_decltype) && _MSC_VER >= 1600\n#define __cpp_decltype 190000\n#endif\n\n#if !defined(__cpp_delegating_constructors) && _MSC_VER >= 1800\n#define __cpp_delegating_constructors 190000\n#endif\n\n#if !defined(__cpp_explicit_conversion) && _MSC_VER >= 1800\n#define __cpp_explicit_conversion 190000\n#endif\n\n#if !defined(__cpp_inheriting_constructors) && _MSC_VER >= 1900\n#define __cpp_inheriting_constructors 190000\n#endif\n\n#if !defined(__cpp_initializer_lists) && _MSC_VER >= 1900\n#define __cpp_initializer_lists 190000\n#endif\n\n#if !defined(__cpp_lambdas) && _MSC_VER >= 1600\n#define __cpp_lambdas 190000\n#endif\n\n#if !defined(__cpp_nsdmi) && _MSC_VER >= 1900\n#define __cpp_nsdmi 190000\n#endif\n\n#if !defined(__cpp_range_based_for) && _MSC_VER >= 1700\n#define __cpp_range_based_for 190000\n#endif\n\n#if !defined(__cpp_raw_strings) && _MSC_VER >= 1800\n#define __cpp_raw_strings 190000\n#endif\n\n#if !defined(__cpp_ref_qualifiers) && _MSC_VER >= 1900\n#define __cpp_ref_qualifiers 190000\n#endif\n\n#if !defined(__cpp_rvalue_references) && _MSC_VER >= 1600\n#define __cpp_rvalue_references 190000\n#endif\n\n#if !defined(__cpp_static_assert) && _MSC_VER >= 1600\n#define __cpp_static_assert 190000\n#endif\n\n//#if !defined(__cpp_unicode_literals)\n//# define __cpp_unicode_literals 190000\n//#endif\n\n#if !defined(__cpp_user_defined_literals) && _MSC_VER >= 1900\n#define __cpp_user_defined_literals 190000\n#endif\n\n#if !defined(__cpp_variadic_templates) && _MSC_VER >= 1800\n#define __cpp_variadic_templates 190000\n#endif\n\n\n// C++ 14\n\n//#if !defined(__cpp_aggregate_nsdmi)\n//#define __cpp_aggregate_nsdmi 190000\n//#endif\n\n#if !defined(__cpp_binary_literals) && _MSC_VER >= 1900\n#define __cpp_binary_literals 190000\n#endif\n\n#if !defined(__cpp_decltype_auto) && _MSC_VER >= 1900\n#define __cpp_decltype_auto 190000\n#endif\n\n#if !defined(__cpp_generic_lambdas) && _MSC_VER >= 1900\n#define __cpp_generic_lambdas 190000\n#endif\n\n#if !defined(__cpp_init_captures) && _MSC_VER >= 1900\n#define __cpp_init_captures 190000\n#endif\n\n#if !defined(__cpp_return_type_deduction) && _MSC_VER >= 1900\n#define __cpp_return_type_deduction 190000\n#endif\n\n#if !defined(__cpp_sized_deallocation) && _MSC_VER >= 1900\n#define __cpp_sized_deallocation 190000\n#endif\n\n#if !defined(__cpp_variable_templates) && _MSC_FULL_VER >= 190023506\n#define __cpp_variable_templates 190000\n#endif\n\n#endif // _MSC_VER\n\n\n// Much to my surprise, GCC's support of these is actually incomplete, so fill in the gaps\n#if (defined(__GNUC__) && !defined(__clang__))\n\n#define QUICKCPPLIB_GCC (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)\n\n#if !defined(__cpp_exceptions) && defined(__EXCEPTIONS)\n#define __cpp_exceptions 190000\n#endif\n\n#if !defined(__cpp_rtti) && defined(__GXX_RTTI)\n#define __cpp_rtti 190000\n#endif\n\n\n// C++ 11\n#if defined(__GXX_EXPERIMENTAL_CXX0X__)\n\n#if !defined(__cpp_alias_templates) && (QUICKCPPLIB_GCC >= 40700)\n#define __cpp_alias_templates 190000\n#endif\n\n#if !defined(__cpp_attributes) && (QUICKCPPLIB_GCC >= 40800)\n#define __cpp_attributes 190000\n#endif\n\n#if !defined(__cpp_constexpr) && (QUICKCPPLIB_GCC >= 40600)\n#define __cpp_constexpr 190000\n#endif\n\n#if !defined(__cpp_decltype) && (QUICKCPPLIB_GCC >= 40300)\n#define __cpp_decltype 190000\n#endif\n\n#if !defined(__cpp_delegating_constructors) && (QUICKCPPLIB_GCC >= 40700)\n#define __cpp_delegating_constructors 190000\n#endif\n\n#if !defined(__cpp_explicit_conversion) && (QUICKCPPLIB_GCC >= 40500)\n#define __cpp_explicit_conversion 190000\n#endif\n\n#if !defined(__cpp_inheriting_constructors) && (QUICKCPPLIB_GCC >= 40800)\n#define __cpp_inheriting_constructors 190000\n#endif\n\n#if !defined(__cpp_initializer_lists) && (QUICKCPPLIB_GCC >= 40800)\n#define __cpp_initializer_lists 190000\n#endif\n\n#if !defined(__cpp_lambdas) && (QUICKCPPLIB_GCC >= 40500)\n#define __cpp_lambdas 190000\n#endif\n\n#if !defined(__cpp_nsdmi) && (QUICKCPPLIB_GCC >= 40700)\n#define __cpp_nsdmi 190000\n#endif\n\n#if !defined(__cpp_range_based_for) && (QUICKCPPLIB_GCC >= 40600)\n#define __cpp_range_based_for 190000\n#endif\n\n#if !defined(__cpp_raw_strings) && (QUICKCPPLIB_GCC >= 40500)\n#define __cpp_raw_strings 190000\n#endif\n\n#if !defined(__cpp_ref_qualifiers) && (QUICKCPPLIB_GCC >= 40801)\n#define __cpp_ref_qualifiers 190000\n#endif\n\n// __cpp_rvalue_reference deviation\n#if !defined(__cpp_rvalue_references) && defined(__cpp_rvalue_reference)\n#define __cpp_rvalue_references __cpp_rvalue_reference\n#endif\n\n#if !defined(__cpp_static_assert) && (QUICKCPPLIB_GCC >= 40300)\n#define __cpp_static_assert 190000\n#endif\n\n#if !defined(__cpp_unicode_characters) && (QUICKCPPLIB_GCC >= 40500)\n#define __cpp_unicode_characters 190000\n#endif\n\n#if !defined(__cpp_unicode_literals) && (QUICKCPPLIB_GCC >= 40500)\n#define __cpp_unicode_literals 190000\n#endif\n\n#if !defined(__cpp_user_defined_literals) && (QUICKCPPLIB_GCC >= 40700)\n#define __cpp_user_defined_literals 190000\n#endif\n\n#if !defined(__cpp_variadic_templates) && (QUICKCPPLIB_GCC >= 40400)\n#define __cpp_variadic_templates 190000\n#endif\n\n\n// C++ 14\n// Every C++ 14 supporting GCC does the right thing here\n\n#endif // __GXX_EXPERIMENTAL_CXX0X__\n\n#endif // GCC\n\n\n// clang deviates in some places from the present SG-10 draft, plus older\n// clangs are quite incomplete\n#if defined(__clang__)\n\n#define QUICKCPPLIB_CLANG (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)\n\n#if !defined(__cpp_exceptions) && (defined(__EXCEPTIONS) || defined(_CPPUNWIND))\n#define __cpp_exceptions 190000\n#endif\n\n#if !defined(__cpp_rtti) && (defined(__GXX_RTTI) || defined(_CPPRTTI))\n#define __cpp_rtti 190000\n#endif\n\n\n// C++ 11\n#if defined(__GXX_EXPERIMENTAL_CXX0X__)\n\n#if !defined(__cpp_alias_templates) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_alias_templates 190000\n#endif\n\n#if !defined(__cpp_attributes) && (QUICKCPPLIB_CLANG >= 30300)\n#define __cpp_attributes 190000\n#endif\n\n#if !defined(__cpp_constexpr) && (QUICKCPPLIB_CLANG >= 30100)\n#define __cpp_constexpr 190000\n#endif\n\n#if !defined(__cpp_decltype) && (QUICKCPPLIB_CLANG >= 20900)\n#define __cpp_decltype 190000\n#endif\n\n#if !defined(__cpp_delegating_constructors) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_delegating_constructors 190000\n#endif\n\n#if !defined(__cpp_explicit_conversion) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_explicit_conversion 190000\n#endif\n\n#if !defined(__cpp_inheriting_constructors) && (QUICKCPPLIB_CLANG >= 30300)\n#define __cpp_inheriting_constructors 190000\n#endif\n\n#if !defined(__cpp_initializer_lists) && (QUICKCPPLIB_CLANG >= 30100)\n#define __cpp_initializer_lists 190000\n#endif\n\n#if !defined(__cpp_lambdas) && (QUICKCPPLIB_CLANG >= 30100)\n#define __cpp_lambdas 190000\n#endif\n\n#if !defined(__cpp_nsdmi) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_nsdmi 190000\n#endif\n\n#if !defined(__cpp_range_based_for) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_range_based_for 190000\n#endif\n\n// __cpp_raw_string_literals deviation\n#if !defined(__cpp_raw_strings) && defined(__cpp_raw_string_literals)\n#define __cpp_raw_strings __cpp_raw_string_literals\n#endif\n#if !defined(__cpp_raw_strings) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_raw_strings 190000\n#endif\n\n#if !defined(__cpp_ref_qualifiers) && (QUICKCPPLIB_CLANG >= 20900)\n#define __cpp_ref_qualifiers 190000\n#endif\n\n// __cpp_rvalue_reference deviation\n#if !defined(__cpp_rvalue_references) && defined(__cpp_rvalue_reference)\n#define __cpp_rvalue_references __cpp_rvalue_reference\n#endif\n#if !defined(__cpp_rvalue_references) && (QUICKCPPLIB_CLANG >= 20900)\n#define __cpp_rvalue_references 190000\n#endif\n\n#if !defined(__cpp_static_assert) && (QUICKCPPLIB_CLANG >= 20900)\n#define __cpp_static_assert 190000\n#endif\n\n#if !defined(__cpp_unicode_characters) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_unicode_characters 190000\n#endif\n\n#if !defined(__cpp_unicode_literals) && (QUICKCPPLIB_CLANG >= 30000)\n#define __cpp_unicode_literals 190000\n#endif\n\n// __cpp_user_literals deviation\n#if !defined(__cpp_user_defined_literals) && defined(__cpp_user_literals)\n#define __cpp_user_defined_literals __cpp_user_literals\n#endif\n#if !defined(__cpp_user_defined_literals) && (QUICKCPPLIB_CLANG >= 30100)\n#define __cpp_user_defined_literals 190000\n#endif\n\n#if !defined(__cpp_variadic_templates) && (QUICKCPPLIB_CLANG >= 20900)\n#define __cpp_variadic_templates 190000\n#endif\n\n\n// C++ 14\n// Every C++ 14 supporting clang does the right thing here\n\n#endif // __GXX_EXPERIMENTAL_CXX0X__\n\n#endif // clang\n\n#endif\n// Note the second line of this file must ALWAYS be the git SHA, third line ALWAYS the git SHA update time\n#define QUICKCPPLIB_PREVIOUS_COMMIT_REF 7f3df03d2e927815fffbf74b6dd69cd660f32b0a\n#define QUICKCPPLIB_PREVIOUS_COMMIT_DATE \"2017-12-14 08:04:25 +00:00\"\n#define QUICKCPPLIB_PREVIOUS_COMMIT_UNIQUE 7f3df03d\n#define QUICKCPPLIB_VERSION_GLUE2(a, b) a##b\n#define QUICKCPPLIB_VERSION_GLUE(a, b) QUICKCPPLIB_VERSION_GLUE2(a, b)\n\n// clang-format off\n\n\n\n\n\n\n\n\n\n\n\n\n\n#define QUICKCPPLIB_NAMESPACE quickcpplib::QUICKCPPLIB_VERSION_GLUE(_, QUICKCPPLIB_PREVIOUS_COMMIT_UNIQUE)\n#define QUICKCPPLIB_NAMESPACE_BEGIN namespace quickcpplib { namespace QUICKCPPLIB_VERSION_GLUE(_, QUICKCPPLIB_PREVIOUS_COMMIT_UNIQUE) {\n#define QUICKCPPLIB_NAMESPACE_END } }\n\n// clang-format on\n\n#ifdef _MSC_VER\n#define QUICKCPPLIB_BIND_MESSAGE_PRAGMA2(x) __pragma(message(x))\n#define QUICKCPPLIB_BIND_MESSAGE_PRAGMA(x) QUICKCPPLIB_BIND_MESSAGE_PRAGMA2(x)\n#define QUICKCPPLIB_BIND_MESSAGE_PREFIX(type) __FILE__ \"(\" QUICKCPPLIB_BIND_STRINGIZE2(__LINE__) \"): \" type \": \"\n#define QUICKCPPLIB_BIND_MESSAGE_(type, prefix, msg) QUICKCPPLIB_BIND_MESSAGE_PRAGMA(prefix msg)\n#else\n#define QUICKCPPLIB_BIND_MESSAGE_PRAGMA2(x) _Pragma(#x)\n#define QUICKCPPLIB_BIND_MESSAGE_PRAGMA(type, x) QUICKCPPLIB_BIND_MESSAGE_PRAGMA2(type x)\n#define QUICKCPPLIB_BIND_MESSAGE_(type, prefix, msg) QUICKCPPLIB_BIND_MESSAGE_PRAGMA(type, msg)\n#endif\n//! Have the compiler output a message\n#define QUICKCPPLIB_MESSAGE(msg) QUICKCPPLIB_BIND_MESSAGE_(message, QUICKCPPLIB_BIND_MESSAGE_PREFIX(\"message\"), msg)\n//! Have the compiler output a note\n#define QUICKCPPLIB_NOTE(msg) QUICKCPPLIB_BIND_MESSAGE_(message, QUICKCPPLIB_BIND_MESSAGE_PREFIX(\"note\"), msg)\n//! Have the compiler output a warning\n#define QUICKCPPLIB_WARNING(msg) QUICKCPPLIB_BIND_MESSAGE_(GCC warning, QUICKCPPLIB_BIND_MESSAGE_PREFIX(\"warning\"), msg)\n//! Have the compiler output an error\n#define QUICKCPPLIB_ERROR(msg) QUICKCPPLIB_BIND_MESSAGE_(GCC error, QUICKCPPLIB_BIND_MESSAGE_PREFIX(\"error\"), msg)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#define QUICKCPPLIB_ANNOTATE_RWLOCK_CREATE(p)\n#define QUICKCPPLIB_ANNOTATE_RWLOCK_DESTROY(p)\n#define QUICKCPPLIB_ANNOTATE_RWLOCK_ACQUIRED(p, s)\n#define QUICKCPPLIB_ANNOTATE_RWLOCK_RELEASED(p, s)\n#define QUICKCPPLIB_ANNOTATE_IGNORE_READS_BEGIN()\n#define QUICKCPPLIB_ANNOTATE_IGNORE_READS_END()\n#define QUICKCPPLIB_ANNOTATE_IGNORE_WRITES_BEGIN()\n#define QUICKCPPLIB_ANNOTATE_IGNORE_WRITES_END()\n#define QUICKCPPLIB_DRD_IGNORE_VAR(x)\n#define QUICKCPPLIB_DRD_STOP_IGNORING_VAR(x)\n#define QUICKCPPLIB_RUNNING_ON_VALGRIND (0)\n\n\n#ifndef QUICKCPPLIB_IN_THREAD_SANITIZER\n#if defined(__has_feature)\n#if __has_feature(thread_sanitizer)\n#define QUICKCPPLIB_IN_THREAD_SANITIZER 1\n#endif\n#elif defined(__SANITIZE_ADDRESS__)\n#define QUICKCPPLIB_IN_THREAD_SANITIZER 1\n#endif\n#endif\n#ifndef QUICKCPPLIB_IN_THREAD_SANITIZER\n#define QUICKCPPLIB_IN_THREAD_SANITIZER 0\n#endif\n\n#if QUICKCPPLIB_IN_THREAD_SANITIZER\n#define QUICKCPPLIB_DISABLE_THREAD_SANITIZE __attribute__((no_sanitize_thread))\n#else\n#define QUICKCPPLIB_DISABLE_THREAD_SANITIZE\n#endif\n\n#ifndef QUICKCPPLIB_SMT_PAUSE\n#if !defined(__clang__) && defined(_MSC_VER) && _MSC_VER >= 1310 && (defined(_M_IX86) || defined(_M_X64))\nextern \"C\" void _mm_pause();\n#pragma intrinsic(_mm_pause)\n#define QUICKCPPLIB_SMT_PAUSE _mm_pause();\n#elif !defined(__c2__) && defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))\n#define QUICKCPPLIB_SMT_PAUSE __asm__ __volatile__(\"rep; nop\" : : : \"memory\");\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_FORCEINLINE\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_FORCEINLINE __forceinline\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_FORCEINLINE __attribute__((always_inline))\n#else\n#define QUICKCPPLIB_FORCEINLINE\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_NOINLINE\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_NOINLINE __declspec(noinline)\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_NOINLINE __attribute__((noinline))\n#else\n#define QUICKCPPLIB_NOINLINE\n#endif\n#endif\n\n#if !defined(QUICKCPPLIB_NORETURN)\n#ifdef __cpp_attributes\n#define QUICKCPPLIB_NORETURN [[noreturn]]\n#elif defined(_MSC_VER)\n#define QUICKCPPLIB_NORETURN __declspec(noreturn)\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_NORETURN __attribute__((__noreturn__))\n#else\n#define QUICKCPPLIB_NORETURN\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_NODISCARD\n#ifdef __has_cpp_attribute\n#if __has_cpp_attribute(nodiscard)\n#define QUICKCPPLIB_NODISCARD [[nodiscard]]\n#endif\n#elif defined(__clang__)\n#define QUICKCPPLIB_NODISCARD __attribute__((warn_unused_result))\n#elif defined(_MSC_VER)\n// _Must_inspect_result_ expands into this\n#define QUICKCPPLIB_NODISCARD __declspec(\"SAL_name\" \"(\" \"\\\"_Must_inspect_result_\\\"\" \",\" \"\\\"\\\"\" \",\" \"\\\"2\\\"\" \")\") __declspec(\"SAL_begin\") __declspec(\"SAL_post\") __declspec(\"SAL_mustInspect\") __declspec(\"SAL_post\") __declspec(\"SAL_checkReturn\") __declspec(\"SAL_end\")\n\n\n\n\n\n\n\n\n#endif\n#endif\n#ifndef QUICKCPPLIB_NODISCARD\n#define QUICKCPPLIB_NODISCARD\n#endif\n\n#ifndef QUICKCPPLIB_SYMBOL_VISIBLE\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_SYMBOL_VISIBLE\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_SYMBOL_VISIBLE __attribute__((visibility(\"default\")))\n#else\n#define QUICKCPPLIB_SYMBOL_VISIBLE\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_SYMBOL_EXPORT\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_SYMBOL_EXPORT __declspec(dllexport)\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_SYMBOL_EXPORT __attribute__((visibility(\"default\")))\n#else\n#define QUICKCPPLIB_SYMBOL_EXPORT\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_SYMBOL_IMPORT\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_SYMBOL_IMPORT __declspec(dllimport)\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_SYMBOL_IMPORT\n#else\n#define QUICKCPPLIB_SYMBOL_IMPORT\n#endif\n#endif\n\n#ifndef QUICKCPPLIB_THREAD_LOCAL\n#if _MSC_VER >= 1800\n#define QUICKCPPLIB_THREAD_LOCAL_IS_CXX11 1\n#elif __cplusplus >= 201103\n#if __GNUC__ >= 5 && !defined(__clang__)\n#define QUICKCPPLIB_THREAD_LOCAL_IS_CXX11 1\n#elif defined(__has_feature)\n#if __has_feature(cxx_thread_local)\n#define QUICKCPPLIB_THREAD_LOCAL_IS_CXX11 1\n#endif\n#endif\n#endif\n#ifdef QUICKCPPLIB_THREAD_LOCAL_IS_CXX11\n#define QUICKCPPLIB_THREAD_LOCAL thread_local\n#endif\n#ifndef QUICKCPPLIB_THREAD_LOCAL\n#if defined(_MSC_VER)\n#define QUICKCPPLIB_THREAD_LOCAL __declspec(thread)\n#elif defined(__GNUC__)\n#define QUICKCPPLIB_THREAD_LOCAL __thread\n#else\n#error Unknown compiler, cannot set QUICKCPPLIB_THREAD_LOCAL\n#endif\n#endif\n#endif\n/* MSVC capable preprocessor macro overloading\n(C) 2014-2017 Niall Douglas (3 commits)\nFile Created: Aug 2014\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef QUICKCPPLIB_PREPROCESSOR_MACRO_OVERLOAD_H\n#define QUICKCPPLIB_PREPROCESSOR_MACRO_OVERLOAD_H\n\n#define QUICKCPPLIB_GLUE(x, y) x y\n\n#define QUICKCPPLIB_RETURN_ARG_COUNT(_1_, _2_, _3_, _4_, _5_, _6_, _7_, _8_, count, ...) count\n#define QUICKCPPLIB_EXPAND_ARGS(args) QUICKCPPLIB_RETURN_ARG_COUNT args\n#define QUICKCPPLIB_COUNT_ARGS_MAX8(...) QUICKCPPLIB_EXPAND_ARGS((__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0))\n\n#define QUICKCPPLIB_OVERLOAD_MACRO2(name, count) name##count\n#define QUICKCPPLIB_OVERLOAD_MACRO1(name, count) QUICKCPPLIB_OVERLOAD_MACRO2(name, count)\n#define QUICKCPPLIB_OVERLOAD_MACRO(name, count) QUICKCPPLIB_OVERLOAD_MACRO1(name, count)\n\n#define QUICKCPPLIB_CALL_OVERLOAD(name, ...) QUICKCPPLIB_GLUE(QUICKCPPLIB_OVERLOAD_MACRO(name, QUICKCPPLIB_COUNT_ARGS_MAX8(__VA_ARGS__)), (__VA_ARGS__))\n\n#define QUICKCPPLIB_GLUE_(x, y) x y\n\n#define QUICKCPPLIB_RETURN_ARG_COUNT_(_1_, _2_, _3_, _4_, _5_, _6_, _7_, _8_, count, ...) count\n#define QUICKCPPLIB_EXPAND_ARGS_(args) QUICKCPPLIB_RETURN_ARG_COUNT_ args\n#define QUICKCPPLIB_COUNT_ARGS_MAX8_(...) QUICKCPPLIB_EXPAND_ARGS_((__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0))\n\n#define QUICKCPPLIB_OVERLOAD_MACRO2_(name, count) name##count\n#define QUICKCPPLIB_OVERLOAD_MACRO1_(name, count) QUICKCPPLIB_OVERLOAD_MACRO2_(name, count)\n#define QUICKCPPLIB_OVERLOAD_MACRO_(name, count) QUICKCPPLIB_OVERLOAD_MACRO1_(name, count)\n\n#define QUICKCPPLIB_CALL_OVERLOAD_(name, ...) QUICKCPPLIB_GLUE_(QUICKCPPLIB_OVERLOAD_MACRO_(name, QUICKCPPLIB_COUNT_ARGS_MAX8_(__VA_ARGS__)), (__VA_ARGS__))\n\n#endif\n#ifdef __cpp_concepts\n#define QUICKCPPLIB_TREQUIRES_EXPAND8(a, b, c, d, e, f, g, h) a &&QUICKCPPLIB_TREQUIRES_EXPAND7(b, c, d, e, f, g, h)\n#define QUICKCPPLIB_TREQUIRES_EXPAND7(a, b, c, d, e, f, g) a &&QUICKCPPLIB_TREQUIRES_EXPAND6(b, c, d, e, f, g)\n#define QUICKCPPLIB_TREQUIRES_EXPAND6(a, b, c, d, e, f) a &&QUICKCPPLIB_TREQUIRES_EXPAND5(b, c, d, e, f)\n#define QUICKCPPLIB_TREQUIRES_EXPAND5(a, b, c, d, e) a &&QUICKCPPLIB_TREQUIRES_EXPAND4(b, c, d, e)\n#define QUICKCPPLIB_TREQUIRES_EXPAND4(a, b, c, d) a &&QUICKCPPLIB_TREQUIRES_EXPAND3(b, c, d)\n#define QUICKCPPLIB_TREQUIRES_EXPAND3(a, b, c) a &&QUICKCPPLIB_TREQUIRES_EXPAND2(b, c)\n#define QUICKCPPLIB_TREQUIRES_EXPAND2(a, b) a &&QUICKCPPLIB_TREQUIRES_EXPAND1(b)\n#define QUICKCPPLIB_TREQUIRES_EXPAND1(a) a\n\n//! Expands into a && b && c && ...\n#define QUICKCPPLIB_TREQUIRES(...) requires QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_TREQUIRES_EXPAND, __VA_ARGS__)\n\n#define QUICKCPPLIB_TEMPLATE(...) template <__VA_ARGS__>\n#define QUICKCPPLIB_TEXPR(...) requires { (__VA_ARGS__); }\n\n#define QUICKCPPLIB_TPRED(...) (__VA_ARGS__)\n#define QUICKCPPLIB_REQUIRES(...) requires __VA_ARGS__\n#else\n#define QUICKCPPLIB_TEMPLATE(...) template <__VA_ARGS__\n#define QUICKCPPLIB_TREQUIRES(...) , __VA_ARGS__ >\n#define QUICKCPPLIB_TEXPR(...) typename = decltype(__VA_ARGS__)\n#define QUICKCPPLIB_TPRED(...) typename = std::enable_if_t<__VA_ARGS__>\n#define QUICKCPPLIB_REQUIRES(...)\n#endif\n\n\n#endif\n#ifndef __cpp_variadic_templates\n#error Outcome needs variadic template support in the compiler\n#endif\n#if __cpp_constexpr < 201304 && _MSC_FULL_VER < 191100000\n#error Outcome needs constexpr (C++ 14) support in the compiler\n#endif\n#ifndef __cpp_variable_templates\n#error Outcome needs variable template support in the compiler\n#endif\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_SYMBOL_VISIBLE\n#define OUTCOME_SYMBOL_VISIBLE QUICKCPPLIB_SYMBOL_VISIBLE\n#endif\n#ifndef OUTCOME_NODISCARD\n#define OUTCOME_NODISCARD QUICKCPPLIB_NODISCARD\n#endif\n#ifndef OUTCOME_THREAD_LOCAL\n#define OUTCOME_THREAD_LOCAL QUICKCPPLIB_THREAD_LOCAL\n#endif\n#ifndef OUTCOME_TEMPLATE\n#define OUTCOME_TEMPLATE(...) QUICKCPPLIB_TEMPLATE(__VA_ARGS__)\n#endif\n#ifndef OUTCOME_TREQUIRES\n#define OUTCOME_TREQUIRES(...) QUICKCPPLIB_TREQUIRES(__VA_ARGS__)\n#endif\n#ifndef OUTCOME_TEXPR\n#define OUTCOME_TEXPR(...) QUICKCPPLIB_TEXPR(__VA_ARGS__)\n#endif\n#ifndef OUTCOME_TPRED\n#define OUTCOME_TPRED(...) QUICKCPPLIB_TPRED(__VA_ARGS__)\n#endif\n#ifndef OUTCOME_REQUIRES\n#define OUTCOME_REQUIRES(...) QUICKCPPLIB_REQUIRES(__VA_ARGS__)\n#endif\n/* Convenience macros for importing local namespace binds\n(C) 2014-2017 Niall Douglas (9 commits)\nFile Created: Aug 2014\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef QUICKCPPLIB_BIND_IMPORT_HPP\n#define QUICKCPPLIB_BIND_IMPORT_HPP\n\n/* 2014-10-9 ned: I lost today figuring out the below. I really hate the C preprocessor now.\n *\n * Anyway, infinity = 8. It's easy to expand below if needed.\n */\n\n\n\n\n\n#define QUICKCPPLIB_BIND_STRINGIZE(a) #a\n#define QUICKCPPLIB_BIND_STRINGIZE2(a) QUICKCPPLIB_BIND_STRINGIZE(a)\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION8(a, b, c, d, e, f, g, h) a##_##b##_##c##_##d##_##e##_##f##_##g##_##h\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION7(a, b, c, d, e, f, g) a##_##b##_##c##_##d##_##e##_##f##_##g\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION6(a, b, c, d, e, f) a##_##b##_##c##_##d##_##e##_##f\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION5(a, b, c, d, e) a##_##b##_##c##_##d##_##e\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION4(a, b, c, d) a##_##b##_##c##_##d\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION3(a, b, c) a##_##b##_##c\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION2(a, b) a##_##b\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION1(a) a\n//! Concatenates each parameter with _\n#define QUICKCPPLIB_BIND_NAMESPACE_VERSION(...) QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_BIND_NAMESPACE_VERSION, __VA_ARGS__)\n\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT_2(name, modifier) name\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT2(name, modifier) ::name\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT_1(name) name\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT1(name) ::name\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT_(...) QUICKCPPLIB_CALL_OVERLOAD_(QUICKCPPLIB_BIND_NAMESPACE_SELECT_, __VA_ARGS__)\n#define QUICKCPPLIB_BIND_NAMESPACE_SELECT(...) QUICKCPPLIB_CALL_OVERLOAD_(QUICKCPPLIB_BIND_NAMESPACE_SELECT, __VA_ARGS__)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND8(a, b, c, d, e, f, g, h) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c QUICKCPPLIB_BIND_NAMESPACE_SELECT d QUICKCPPLIB_BIND_NAMESPACE_SELECT e QUICKCPPLIB_BIND_NAMESPACE_SELECT f QUICKCPPLIB_BIND_NAMESPACE_SELECT g QUICKCPPLIB_BIND_NAMESPACE_SELECT h\n\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND7(a, b, c, d, e, f, g) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c QUICKCPPLIB_BIND_NAMESPACE_SELECT d QUICKCPPLIB_BIND_NAMESPACE_SELECT e QUICKCPPLIB_BIND_NAMESPACE_SELECT f QUICKCPPLIB_BIND_NAMESPACE_SELECT g\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND6(a, b, c, d, e, f) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c QUICKCPPLIB_BIND_NAMESPACE_SELECT d QUICKCPPLIB_BIND_NAMESPACE_SELECT e QUICKCPPLIB_BIND_NAMESPACE_SELECT f\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND5(a, b, c, d, e) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c QUICKCPPLIB_BIND_NAMESPACE_SELECT d QUICKCPPLIB_BIND_NAMESPACE_SELECT e\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND4(a, b, c, d) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c QUICKCPPLIB_BIND_NAMESPACE_SELECT d\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND3(a, b, c) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b QUICKCPPLIB_BIND_NAMESPACE_SELECT c\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND2(a, b) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a QUICKCPPLIB_BIND_NAMESPACE_SELECT b\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPAND1(a) QUICKCPPLIB_BIND_NAMESPACE_SELECT_ a\n//! Expands into a::b::c:: ...\n#define QUICKCPPLIB_BIND_NAMESPACE(...) QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_BIND_NAMESPACE_EXPAND, __VA_ARGS__)\n\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT2(name, modifier) modifier namespace name {\n\n\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT1(name) namespace name {\n\n\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT(...) QUICKCPPLIB_CALL_OVERLOAD_(QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT, __VA_ARGS__)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND8(a, b, c, d, e, f, g, h) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND7(b, c, d, e, f, g, h)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND7(a, b, c, d, e, f, g) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND6(b, c, d, e, f, g)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND6(a, b, c, d, e, f) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND5(b, c, d, e, f)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND5(a, b, c, d, e) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND4(b, c, d, e)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND4(a, b, c, d) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND3(b, c, d)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND3(a, b, c) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND2(b, c)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND2(a, b) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND1(b)\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND1(a) QUICKCPPLIB_BIND_NAMESPACE_BEGIN_NAMESPACE_SELECT a\n\n//! Expands into namespace a { namespace b { namespace c ...\n#define QUICKCPPLIB_BIND_NAMESPACE_BEGIN(...) QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_BIND_NAMESPACE_BEGIN_EXPAND, __VA_ARGS__)\n\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT2(name, modifier) modifier namespace name {\n\n\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT1(name) export namespace name {\n\n\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT(...) QUICKCPPLIB_CALL_OVERLOAD_(QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT, __VA_ARGS__)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND8(a, b, c, d, e, f, g, h) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND7(b, c, d, e, f, g, h)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND7(a, b, c, d, e, f, g) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND6(b, c, d, e, f, g)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND6(a, b, c, d, e, f) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND5(b, c, d, e, f)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND5(a, b, c, d, e) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND4(b, c, d, e)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND4(a, b, c, d) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND3(b, c, d)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND3(a, b, c) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND2(b, c)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND2(a, b) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND1(b)\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND1(a) QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_NAMESPACE_SELECT a\n\n//! Expands into export namespace a { namespace b { namespace c ...\n#define QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN(...) QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN_EXPAND, __VA_ARGS__)\n\n#define QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT2(name, modifier) }\n#define QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT1(name) }\n#define QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT(...) QUICKCPPLIB_CALL_OVERLOAD_(QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT, __VA_ARGS__)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND8(a, b, c, d, e, f, g, h) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND7(b, c, d, e, f, g, h)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND7(a, b, c, d, e, f, g) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND6(b, c, d, e, f, g)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND6(a, b, c, d, e, f) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND5(b, c, d, e, f)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND5(a, b, c, d, e) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND4(b, c, d, e)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND4(a, b, c, d) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND3(b, c, d)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND3(a, b, c) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND2(b, c)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND2(a, b) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND1(b)\n#define QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND1(a) QUICKCPPLIB_BIND_NAMESPACE_END_NAMESPACE_SELECT a\n\n//! Expands into } } ...\n#define QUICKCPPLIB_BIND_NAMESPACE_END(...) QUICKCPPLIB_CALL_OVERLOAD(QUICKCPPLIB_BIND_NAMESPACE_END_EXPAND, __VA_ARGS__)\n\n//! Expands into a static const char string array used to mark BindLib compatible namespaces\n#define QUICKCPPLIB_BIND_DECLARE(decl, desc) static const char *quickcpplib_out[] = {#decl, desc};\n\n#endif\n// Note the second line of this file must ALWAYS be the git SHA, third line ALWAYS the git SHA update time\n#define OUTCOME_PREVIOUS_COMMIT_REF f169631604d4696c02242d482ad9ae1b5a918ef2\n#define OUTCOME_PREVIOUS_COMMIT_DATE \"2018-01-17 15:13:11 +00:00\"\n#define OUTCOME_PREVIOUS_COMMIT_UNIQUE f1696316\n#define OUTCOME_V2 (QUICKCPPLIB_BIND_NAMESPACE_VERSION(outcome_v2, OUTCOME_PREVIOUS_COMMIT_UNIQUE))\n\n\n\n\n#if defined(GENERATING_OUTCOME_MODULE_INTERFACE)\n#define OUTCOME_V2_NAMESPACE QUICKCPPLIB_BIND_NAMESPACE(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_BEGIN QUICKCPPLIB_BIND_NAMESPACE_BEGIN(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_EXPORT_BEGIN QUICKCPPLIB_BIND_NAMESPACE_EXPORT_BEGIN(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_END QUICKCPPLIB_BIND_NAMESPACE_END(OUTCOME_V2)\n#else\n#define OUTCOME_V2_NAMESPACE QUICKCPPLIB_BIND_NAMESPACE(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_BEGIN QUICKCPPLIB_BIND_NAMESPACE_BEGIN(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_EXPORT_BEGIN QUICKCPPLIB_BIND_NAMESPACE_BEGIN(OUTCOME_V2)\n#define OUTCOME_V2_NAMESPACE_END QUICKCPPLIB_BIND_NAMESPACE_END(OUTCOME_V2)\n#endif\n\n\n#ifndef OUTCOME_THROW_EXCEPTION\n#ifdef __cpp_exceptions\n#define OUTCOME_THROW_EXCEPTION(expr) throw expr\n#else\n\n#ifdef _WIN32\n/* Implements backtrace() et al from glibc on win64\n(C) 2016-2017 Niall Douglas (4 commits)\nFile Created: Mar 2016\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef BOOST_BINDLIB_EXECINFO_WIN64_H\n#define BOOST_BINDLIB_EXECINFO_WIN64_H\n\n#ifndef _WIN32\n#error Can only be included on Windows\n#endif\n\n#include \n#include \n\n#ifdef BINDLIB_EXPORTS\n#define EXECINFO_DECL extern __declspec(dllexport)\n#else\n#if defined(__cplusplus) && (!defined(QUICKCPPLIB_HEADERS_ONLY) || QUICKCPPLIB_HEADERS_ONLY == 1) && !0\n#define EXECINFO_DECL inline\n#else\n#define EXECINFO_DECL extern __declspec(dllimport)\n#endif\n#endif\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n//! Fill the array of void * at bt with up to len entries, returning entries filled.\nEXECINFO_DECL _Check_return_ size_t backtrace(_Out_writes_(len) void **bt, _In_ size_t len);\n\n//! Returns a malloced block of string representations of the input backtrace.\nEXECINFO_DECL _Check_return_ _Ret_writes_maybenull_(len) char **backtrace_symbols(_In_reads_(len) void *const *bt, _In_ size_t len);\n\n// extern void backtrace_symbols_fd(void *const *bt, size_t len, int fd);\n\n#ifdef __cplusplus\n}\n\n#if (!defined(QUICKCPPLIB_HEADERS_ONLY) || QUICKCPPLIB_HEADERS_ONLY == 1) && !0\n#define QUICKCPPLIB_INCLUDED_BY_HEADER 1\n/* Implements backtrace() et al from glibc on win64\n(C) 2016-2017 Niall Douglas (14 commits)\nFile Created: Mar 2016\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n/* Implements backtrace() et al from glibc on win64\n(C) 2016-2017 Niall Douglas (4 commits)\nFile Created: Mar 2016\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n (See accompanying file Licence.txt or copy at\n http://www.boost.org/LICENSE_1_0.txt)\n*/\n#include // for abort\n#include \n\n// To avoid including windows.h, this source has been macro expanded and win32 function shimmed for C++ only\n#if defined(__cplusplus) && !defined(__clang__)\nnamespace win32\n{\n extern \"C\" __declspec(dllimport) _Ret_maybenull_ void *__stdcall LoadLibraryA(_In_ const char *lpLibFileName);\n typedef int(__stdcall *GetProcAddress_returntype)();\n extern \"C\" GetProcAddress_returntype __stdcall GetProcAddress(_In_ void *hModule, _In_ const char *lpProcName);\n extern \"C\" __declspec(dllimport) _Success_(return != 0) unsigned short __stdcall RtlCaptureStackBackTrace(_In_ unsigned long FramesToSkip, _In_ unsigned long FramesToCapture, _Out_writes_to_(FramesToCapture, return ) void **BackTrace, _Out_opt_ unsigned long *BackTraceHash);\n extern \"C\" __declspec(dllimport) _Success_(return != 0)\n _When_((cchWideChar == -1) && (cbMultiByte != 0), _Post_equal_to_(_String_length_(lpMultiByteStr) + 1)) int __stdcall WideCharToMultiByte(_In_ unsigned int CodePage, _In_ unsigned long dwFlags, const wchar_t *lpWideCharStr, _In_ int cchWideChar, _Out_writes_bytes_to_opt_(cbMultiByte, return ) char *lpMultiByteStr,\n _In_ int cbMultiByte, _In_opt_ const char *lpDefaultChar, _Out_opt_ int *lpUsedDefaultChar);\n}\n#else\n#ifndef WIN32_LEAN_AND_MEAN\n#define WIN32_LEAN_AND_MEAN\n#endif\n#ifndef NOMINMAX\n#define NOMINMAX\n#endif\n#include \n#endif\n\n#ifdef __cplusplus\nnamespace\n{\n#endif\n\n typedef struct _IMAGEHLP_LINE64\n {\n unsigned long SizeOfStruct;\n void *Key;\n unsigned long LineNumber;\n wchar_t *FileName;\n unsigned long long int Address;\n } IMAGEHLP_LINE64, *PIMAGEHLP_LINE64;\n\n typedef int(__stdcall *SymInitialize_t)(_In_ void *hProcess, _In_opt_ const wchar_t *UserSearchPath, _In_ int fInvadeProcess);\n\n typedef int(__stdcall *SymGetLineFromAddr64_t)(_In_ void *hProcess, _In_ unsigned long long int dwAddr, _Out_ unsigned long *pdwDisplacement, _Out_ PIMAGEHLP_LINE64 Line);\n\n#if defined(__cplusplus) && !defined(__clang__)\n static void *dbghelp;\n#else\nstatic HMODULE dbghelp;\n#endif\n static SymInitialize_t SymInitialize;\n static SymGetLineFromAddr64_t SymGetLineFromAddr64;\n\n static void load_dbghelp()\n {\n#if defined(__cplusplus) && !defined(__clang__)\n using win32::LoadLibraryA;\n using win32::GetProcAddress;\n#endif\n if(dbghelp)\n return;\n dbghelp = LoadLibraryA(\"DBGHELP.DLL\");\n if(dbghelp)\n {\n SymInitialize = (SymInitialize_t) GetProcAddress(dbghelp, \"SymInitializeW\");\n if(!SymInitialize)\n abort();\n if(!SymInitialize((void *) (size_t) -1 /*GetCurrentProcess()*/, NULL, 1))\n abort();\n SymGetLineFromAddr64 = (SymGetLineFromAddr64_t) GetProcAddress(dbghelp, \"SymGetLineFromAddrW64\");\n if(!SymGetLineFromAddr64)\n abort();\n }\n }\n\n#ifdef __cplusplus\n}\n#endif\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n_Check_return_ size_t backtrace(_Out_writes_(len) void **bt, _In_ size_t len)\n{\n#if defined(__cplusplus) && !defined(__clang__)\n using win32::RtlCaptureStackBackTrace;\n#endif\n return RtlCaptureStackBackTrace(1, (unsigned long) len, bt, NULL);\n}\n\n#ifdef _MSC_VER\n#pragma warning(push)\n#pragma warning(disable : 6385 6386) // MSVC static analyser can't grok this function. clang's analyser gives it thumbs up.\n#endif\n_Check_return_ _Ret_writes_maybenull_(len) char **backtrace_symbols(_In_reads_(len) void *const *bt, _In_ size_t len)\n{\n#if defined(__cplusplus) && !defined(__clang__)\n using win32::WideCharToMultiByte;\n#endif\n size_t bytes = (len + 1) * sizeof(void *) + 256, n;\n if(!len)\n return NULL;\n else\n {\n char **ret = (char **) malloc(bytes);\n char *p = (char *) (ret + len + 1), *end = (char *) ret + bytes;\n if(!ret)\n return NULL;\n for(n = 0; n < len + 1; n++)\n ret[n] = NULL;\n load_dbghelp();\n for(n = 0; n < len; n++)\n {\n unsigned long displ;\n IMAGEHLP_LINE64 ihl;\n memset(&ihl, 0, sizeof(ihl));\n ihl.SizeOfStruct = sizeof(IMAGEHLP_LINE64);\n int please_realloc = 0;\n if(!bt[n])\n {\n ret[n] = NULL;\n }\n else\n {\n // Keep offset till later\n ret[n] = (char *) ((char *) p - (char *) ret);\n if(!SymGetLineFromAddr64 || !SymGetLineFromAddr64((void *) (size_t) -1 /*GetCurrentProcess()*/, (size_t) bt[n], &displ, &ihl))\n {\n if(n == 0)\n {\n free(ret);\n return NULL;\n }\n ihl.FileName = (wchar_t *) L\"unknown\";\n ihl.LineNumber = 0;\n }\n retry:\n if(please_realloc)\n {\n char **temp = (char **) realloc(ret, bytes + 256);\n if(!temp)\n {\n free(ret);\n return NULL;\n }\n p = (char *) temp + (p - (char *) ret);\n ret = temp;\n bytes += 256;\n end = (char *) ret + bytes;\n }\n if(ihl.FileName && ihl.FileName[0])\n {\n int plen = WideCharToMultiByte(65001 /*CP_UTF8*/, 0, ihl.FileName, -1, p, (int) (end - p), NULL, NULL);\n if(!plen)\n {\n please_realloc = 1;\n goto retry;\n }\n p[plen - 1] = 0;\n p += plen - 1;\n }\n else\n {\n if(end - p < 16)\n {\n please_realloc = 1;\n goto retry;\n }\n _ui64toa_s((size_t) bt[n], p, end - p, 16);\n p = strchr(p, 0);\n }\n if(end - p < 16)\n {\n please_realloc = 1;\n goto retry;\n }\n *p++ = ':';\n _itoa_s(ihl.LineNumber, p, end - p, 10);\n p = strchr(p, 0) + 1;\n }\n }\n for(n = 0; n < len; n++)\n {\n if(ret[n])\n ret[n] = (char *) ret + (size_t) ret[n];\n }\n return ret;\n }\n}\n#ifdef _MSC_VER\n#pragma warning(pop)\n#endif\n\n// extern void backtrace_symbols_fd(void *const *bt, size_t len, int fd);\n\n#ifdef __cplusplus\n}\n#endif\n#undef QUICKCPPLIB_INCLUDED_BY_HEADER\n#endif\n\n#endif\n\n#endif\n#elif !defined(__ANDROID__)\n#include \n#endif\n#include \n#include \nOUTCOME_V2_NAMESPACE_BEGIN\nnamespace detail\n{\n QUICKCPPLIB_NORETURN inline void do_fatal_exit(const char *expr)\n {\n#if !defined(__ANDROID__)\n void *bt[16];\n size_t btlen = backtrace(bt, sizeof(bt) / sizeof(bt[0])); // NOLINT\n#endif\n fprintf(stderr, \"FATAL: Outcome throws exception %s with exceptions disabled\\n\", expr); // NOLINT\n#if !defined(__ANDROID__)\n char **bts = backtrace_symbols(bt, btlen); // NOLINT\n if(bts != nullptr)\n {\n for(size_t n = 0; n < btlen; n++)\n {\n fprintf(stderr, \" %s\\n\", bts[n]); // NOLINT\n }\n free(bts); // NOLINT\n }\n#endif\n abort();\n }\n} // namespace detail\nOUTCOME_V2_NAMESPACE_END\n#define OUTCOME_THROW_EXCEPTION(expr) OUTCOME_V2_NAMESPACE::detail::do_fatal_exit(#expr)\n\n#endif\n#endif\n\n#ifndef BOOST_OUTCOME_AUTO_TEST_CASE\n#define BOOST_OUTCOME_AUTO_TEST_CASE(a, b) BOOST_AUTO_TEST_CASE(a, b)\n#endif\n\n#endif\n#include \n#include \n#include \n\nOUTCOME_V2_NAMESPACE_BEGIN\n\nnamespace detail\n{\n // Replace void with constructible void_type\n struct empty_type\n {\n };\n struct void_type\n {\n // We always compare true to another instance of me\n constexpr bool operator==(void_type /*unused*/) const noexcept { return true; }\n constexpr bool operator!=(void_type /*unused*/) const noexcept { return false; }\n };\n template using devoid = std::conditional_t::value, void_type, T>;\n\n template using rebind_type5 = Output;\n template \n using rebind_type4 = std::conditional_t< //\n std::is_volatile::value, //\n std::add_volatile_t>>, //\n rebind_type5>;\n template \n using rebind_type3 = std::conditional_t< //\n std::is_const::value, //\n std::add_const_t>>, //\n rebind_type4>;\n template \n using rebind_type2 = std::conditional_t< //\n std::is_lvalue_reference::value, //\n std::add_lvalue_reference_t>>, //\n rebind_type3>;\n template \n using rebind_type = std::conditional_t< //\n std::is_rvalue_reference::value, //\n std::add_rvalue_reference_t>>, //\n rebind_type2>;\n\n // static_assert(std::is_same_v, volatile const int &&>, \"\");\n} // namespace detail\n\n//! Namespace for policies\nnamespace policy\n{\n namespace detail\n {\n struct error_code_passthrough\n {\n };\n /* Pass through `make_error_code` function for anything implicitly convertible to `std::error_code`.\n \\requires `T` is implicitly convertible to `std::error_code`.\n */\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(std::is_convertible::value))\n constexpr inline decltype(auto) make_error_code(T &&v, error_code_passthrough /*unused*/ = {}) { return std::forward(v); }\n\n template constexpr inline void get(const T & /*unused*/);\n struct tuple_passthrough\n {\n };\n /* Pass through `make_error_code` function for any pair or tuple returning the first item.\n \\requires That `make_error_code(std::get<0>(std::declval()))` is a valid expression.\n */\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(make_error_code(get<0>(std::declval()))))\n constexpr inline decltype(auto) make_error_code(T &&v, tuple_passthrough /* unused */ = {}) { return make_error_code(get<0>(std::forward(v))); }\n\n /* Pass through `make_exception_ptr` function for `std::exception_ptr`.\n */\n\n inline std::exception_ptr make_exception_ptr(std::exception_ptr v) { return v; }\n\n template constexpr inline decltype(auto) error_code(T &&v) { return make_error_code(std::forward(v)); }\n template constexpr inline decltype(auto) exception_ptr(T &&v) { return make_exception_ptr(std::forward(v)); }\n } // namespace detail\n //! Used by policies to extract a `std::error_code` from some input `T` via ADL discovery of some `make_error_code(T)` function.\n template constexpr inline decltype(auto) error_code(T &&v) { return detail::error_code(std::forward(v)); }\n //! Used by policies to extract a `std::exception_ptr` from some input `T` via ADL discovery of some `make_exception_ptr(T)` function.\n template constexpr inline decltype(auto) exception_ptr(T &&v) { return detail::exception_ptr(std::forward(v)); }\n\n //! Override to define what the policies which throw a system error with payload ought to do for some particular `result.error()`.\n template constexpr inline void throw_as_system_error_with_payload(const Error &error)\n {\n (void) error;\n static_assert(std::is_convertible::value || std::is_error_code_enum>::value || std::is_error_condition_enum>::value,\n \"To use the error_code_throw_as_system_error policy with a custom Error type, you must define a throw_as_system_error_with_payload() free function to say how to handle the payload\");\n OUTCOME_THROW_EXCEPTION(std::system_error(error_code(error)));\n }\n} // namespace policy\n\n//! Namespace for traits\nnamespace trait\n{\n namespace detail\n {\n template using devoid = OUTCOME_V2_NAMESPACE::detail::devoid;\n template constexpr inline void get(const T & /*unused*/);\n constexpr inline void make_error_code(...);\n // Also enable for any pair or tuple whose first item satisfies make_error_code()\n template (std::declval()))) //\n >\n constexpr inline R make_error_code(T &&);\n template >()))> struct has_error_code : std::integral_constant>::value || std::is_convertible::value>\n {\n };\n constexpr inline void make_exception_ptr(...);\n template >()))> struct has_exception_ptr : std::integral_constant>::value || std::is_convertible::value>\n {\n };\n } // namespace detail\n /*! Trait for whether a free function `make_error_code(T)` returning a `std::error_code` exists or not.\n Also returns true if `std::error_code` is convertible from T.\n */\n\n\n template struct has_error_code : detail::has_error_code\n {\n };\n /*! Trait for whether a free function `make_error_code(T)` returning a `std::error_code` exists or not.\n Also returns true if `std::error_code` is convertible from T.\n */\n\n\n template constexpr bool has_error_code_v = has_error_code::value;\n\n /*! Trait for whether a free function `make_exception_ptr(T)` returning a `std::exception_ptr` exists or not.\n Also returns true if `std::exception_ptr` is convertible from T.\n */\n\n\n template struct has_exception_ptr : detail::has_exception_ptr\n {\n };\n /*! Trait for whether a free function `make_exception_ptr(T)` returning a `std::exception_ptr` exists or not.\n Also returns true if `std::exception_ptr` is convertible from T.\n */\n\n\n template constexpr bool has_exception_ptr_v = has_exception_ptr::value;\n\n} // namespace trait\n\n/*! Type sugar for implicitly constructing a `result<>` with a successful state.\n*/\n\ntemplate struct success_type\n{\n //! The type of the successful state.\n using value_type = T;\n\nprivate:\n //! The value of the successful state.\n value_type _value;\n\npublic:\n /// \\output_section Default, copy/move constructors and assignment\n //! Default constructor\n success_type() = default;\n //! Copy constructor\n success_type(const success_type &) = default;\n //! Move constructor\n success_type(success_type &&) = default; // NOLINT\n //! Copy assignment\n success_type &operator=(const success_type &) = default;\n //! Move assignment\n success_type &operator=(success_type &&) = default; // NOLINT\n //! Destructor\n ~success_type() = default;\n /*! Initialising constructor\n\n \\requires That `U` is not `success_type`.\n */\n\n\n\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_same>::value))\n constexpr explicit success_type(U &&v)\n : _value(std::forward(v))\n {\n }\n\n /// \\output_section Observers\n /*! Access value.\n \\returns Reference to the held `value_type` according to overload.\n \\group success_type_value\n */\n\n\n\n constexpr value_type &value() & { return _value; }\n /// \\group success_type_value\n constexpr const value_type &value() const & { return _value; }\n /// \\group success_type_value\n constexpr value_type &&value() && { return std::move(_value); }\n /// \\group success_type_value\n constexpr const value_type &&value() const && { return std::move(_value); }\n};\n/*! Type sugar for implicitly constructing a `result<>` with a successful state.\n*/\n\ntemplate <> struct success_type\n{\n //! The type of the successful state.\n using value_type = void;\n};\n/*! Returns type sugar for implicitly constructing a `result` with a successful state,\ndefault constructing `T` if necessary.\n*/\n\n\ninline constexpr success_type success() noexcept\n{\n return success_type{};\n}\n/*! Returns type sugar for implicitly constructing a `result` with a successful state.\n\\effects Copies or moves the successful state supplied into the returned type sugar.\n*/\n\n\ntemplate inline constexpr success_type> success(T &&v)\n{\n return success_type>{std::forward(v)};\n}\n\n/*! Type sugar for implicitly constructing a `result<>` with a failure state of error code and exception.\n*/\n\ntemplate struct failure_type\n{\n //! The type of the error code\n using error_type = EC;\n //! The type of the exception\n using exception_type = E;\n\nprivate:\n //! The error code\n error_type _error;\n //! The exception\n exception_type _exception;\n\npublic:\n /// \\output_section Default, copy/move constructors and assignment\n //! Default constructor\n failure_type() = default;\n //! Copy constructor\n failure_type(const failure_type &) = default;\n //! Move constructor\n failure_type(failure_type &&) = default; // NOLINT\n //! Copy assignment\n failure_type &operator=(const failure_type &) = default;\n //! Move assignment\n failure_type &operator=(failure_type &&) = default; // NOLINT\n //! Destructor\n ~failure_type() = default;\n //! Initialising constructor\n template \n constexpr explicit failure_type(U &&u, V &&v)\n : _error(std::forward(u))\n , _exception(std::forward(v))\n {\n }\n\n /// \\output_section Observers\n /*! Access error.\n \\returns Reference to the held `error_type` according to overload.\n \\group failure_type_error\n */\n\n\n\n constexpr error_type &error() & { return _error; }\n /// \\group failure_type_error\n constexpr const error_type &error() const & { return _error; }\n /// \\group failure_type_error\n constexpr error_type &&error() && { return std::move(_error); }\n /// \\group failure_type_error\n constexpr const error_type &&error() const && { return std::move(_error); }\n\n /*! Access exception.\n \\returns Reference to the held `exception_type` according to overload.\n \\group failure_type_exception\n */\n\n\n\n constexpr exception_type &exception() & { return _exception; }\n /// \\group failure_type_exception\n constexpr const exception_type &exception() const & { return _exception; }\n /// \\group failure_type_exception\n constexpr exception_type &&exception() && { return std::move(_exception); }\n /// \\group failure_type_exception\n constexpr const exception_type &&exception() const && { return std::move(_exception); }\n};\n/*! Type sugar for implicitly constructing a `result<>` with a failure state of error code.\n*/\n\ntemplate struct failure_type\n{\n //! The type of the error code\n using error_type = EC;\n //! The type of the exception\n using exception_type = void;\n\nprivate:\n //! The error code\n error_type _error;\n\npublic:\n /// \\output_section Default, copy/move constructors and assignment\n //! Default constructor\n failure_type() = default;\n //! Copy constructor\n failure_type(const failure_type &) = default;\n //! Move constructor\n failure_type(failure_type &&) = default; // NOLINT\n //! Copy assignment\n failure_type &operator=(const failure_type &) = default;\n //! Move assignment\n failure_type &operator=(failure_type &&) = default; // NOLINT\n //! Destructor\n ~failure_type() = default;\n /*! Initialising constructor\n\n \\requires That `U` is not `failure_type`.\n */\n\n\n\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_same>::value))\n constexpr explicit failure_type(U &&u)\n : _error(std::forward(u))\n {\n }\n\n /// \\output_section Observers\n /*! Access error.\n \\returns Reference to the held `error_type` according to overload.\n \\group failure_type_error2\n */\n\n\n\n constexpr error_type &error() & { return _error; }\n /// \\group failure_type_error2\n constexpr const error_type &error() const & { return _error; }\n /// \\group failure_type_error2\n constexpr error_type &&error() && { return std::move(_error); }\n /// \\group failure_type_error2\n constexpr const error_type &&error() const && { return std::move(_error); }\n};\n/*! Type sugar for implicitly constructing a `result<>` with a failure state of exception.\n*/\n\ntemplate struct failure_type\n{\n //! The type of the error code\n using error_type = void;\n //! The type of the exception\n using exception_type = E;\n\nprivate:\n //! The exception\n exception_type _exception;\n\npublic:\n /// \\output_section Default, copy/move constructors and assignment\n //! Default constructor\n failure_type() = default;\n //! Copy constructor\n failure_type(const failure_type &) = default;\n //! Move constructor\n failure_type(failure_type &&) = default; // NOLINT\n //! Copy assignment\n failure_type &operator=(const failure_type &) = default;\n //! Move assignment\n failure_type &operator=(failure_type &&) = default; // NOLINT\n //! Destructor\n ~failure_type() = default;\n /*! Initialising constructor\n\n \\requires That `V` is not `failure_type`.\n */\n\n\n\n OUTCOME_TEMPLATE(class V)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_same>::value))\n constexpr explicit failure_type(V &&v)\n : _exception(std::forward(v))\n {\n }\n\n /// \\output_section Observers\n /*! Access exception.\n \\returns Reference to the held `exception_type` according to overload.\n \\group failure_type_exception2\n */\n\n\n\n constexpr exception_type &exception() & { return _exception; }\n /// \\group failure_type_exception2\n constexpr const exception_type &exception() const & { return _exception; }\n /// \\group failure_type_exception2\n constexpr exception_type &&exception() && { return std::move(_exception); }\n /// \\group failure_type_exception2\n constexpr const exception_type &&exception() const && { return std::move(_exception); }\n};\n/*! Returns type sugar for implicitly constructing a `result` with a failure state.\n\\effects Copies or moves the failure state supplied into the returned type sugar.\n*/\n\n\ntemplate inline constexpr failure_type> failure(EC &&v)\n{\n return failure_type>{std::forward(v)};\n}\n/*! Returns type sugar for implicitly constructing a `result` with a failure state.\n\\effects Copies or moves the failure state supplied into the returned type sugar.\n*/\n\n\ntemplate inline constexpr failure_type, std::decay_t> failure(EC &&v, E &&w)\n{\n return failure_type, std::decay_t>{std::forward(v), std::forward(w)};\n}\n\nnamespace detail\n{\n template struct is_success_type : std::false_type\n {\n };\n template struct is_success_type> : std::true_type\n {\n };\n template struct is_failure_type : std::false_type\n {\n };\n template struct is_failure_type> : std::true_type\n {\n };\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Essentially an internal optional implementation :)\n(C) 2017 Niall Douglas (59 commits)\nFile Created: June 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_VALUE_STORAGE_HPP\n#define OUTCOME_VALUE_STORAGE_HPP\n\n\n\n#include // for uint32_t etc\n#include \n#include // for serialisation\n#include \n#include // for in_place_type_t\n\nOUTCOME_V2_NAMESPACE_BEGIN\n\n#if __cplusplus >= 201700 || _HAS_CXX17\ntemplate using in_place_type_t = std::in_place_type_t;\nusing std::in_place_type;\n#else\n//! Aliases `std::in_place_type_t` if on C++ 17 or later, else defined locally.\ntemplate struct in_place_type_t\n{\n explicit in_place_type_t() = default;\n};\n//! Aliases `std::in_place_type` if on C++ 17 or later, else defined locally.\ntemplate constexpr in_place_type_t in_place_type{};\n#endif\n\nnamespace detail\n{\n // Test if type is an in_place_type_t\n template struct is_in_place_type_t : std::false_type\n {\n };\n template struct is_in_place_type_t> : std::true_type\n {\n };\n\n using status_bitfield_type = uint32_t;\n static constexpr status_bitfield_type status_have_value = (1U << 0U);\n static constexpr status_bitfield_type status_have_error = (1U << 1U);\n static constexpr status_bitfield_type status_have_exception = (1U << 2U);\n static constexpr status_bitfield_type status_error_is_errno = (1U << 4U); // can errno be set from this error?\n // bit 7 unused\n // bits 8-15 unused\n // bits 16-31 used for user supplied 16 bit value\n static constexpr status_bitfield_type status_2byte_shift = 16;\n static constexpr status_bitfield_type status_2byte_mask = (0xffffU << status_2byte_shift);\n\n // Used if T is trivial\n template struct value_storage_trivial\n {\n using value_type = T;\n union {\n empty_type _empty;\n devoid _value;\n };\n status_bitfield_type _status{0};\n constexpr value_storage_trivial() noexcept : _empty{} {}\n // Special from-void catchall constructor, always constructs default T irrespective of whether void is valued or not (can do no better if T cannot be copied)\n struct disable_void_catchall\n {\n };\n using void_value_storage_trivial = std::conditional_t::value, disable_void_catchall, value_storage_trivial>;\n explicit constexpr value_storage_trivial(const void_value_storage_trivial &o) noexcept(std::is_nothrow_default_constructible::value)\n : _value()\n , _status(o._status)\n {\n }\n value_storage_trivial(const value_storage_trivial &) = default; // NOLINT\n value_storage_trivial(value_storage_trivial &&) = default; // NOLINT\n value_storage_trivial &operator=(const value_storage_trivial &) = default; // NOLINT\n value_storage_trivial &operator=(value_storage_trivial &&) = default; // NOLINT\n ~value_storage_trivial() = default;\n constexpr explicit value_storage_trivial(status_bitfield_type status)\n : _empty()\n , _status(status)\n {\n }\n template \n constexpr explicit value_storage_trivial(in_place_type_t /*unused*/, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : _value(std::forward(args)...)\n , _status(status_have_value)\n {\n }\n template \n constexpr value_storage_trivial(in_place_type_t /*unused*/, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : _value(il, std::forward(args)...)\n , _status(status_have_value)\n {\n }\n template static constexpr bool enable_converting_constructor = !std::is_same, value_type>::value && std::is_constructible::value;\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_trivial(const value_storage_trivial &o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_trivial(((o._status & status_have_value) != 0) ? value_storage_trivial(in_place_type, o._value) : value_storage_trivial()) // NOLINT\n {\n _status = o._status;\n }\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_trivial(value_storage_trivial &&o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_trivial(((o._status & status_have_value) != 0) ? value_storage_trivial(in_place_type, std::move(o._value)) : value_storage_trivial()) // NOLINT\n {\n _status = o._status;\n }\n constexpr void swap(value_storage_trivial &o)\n {\n // storage is trivial, so just use assignment\n using std::swap;\n swap(*this, o);\n }\n };\n // Used if T is non-trivial\n template struct value_storage_nontrivial\n {\n using value_type = T;\n union {\n empty_type _empty;\n value_type _value;\n };\n status_bitfield_type _status{0};\n value_storage_nontrivial() noexcept : _empty{} {}\n value_storage_nontrivial &operator=(const value_storage_nontrivial &) = default; // if reaches here, copy assignment is trivial\n value_storage_nontrivial &operator=(value_storage_nontrivial &&) = default; // NOLINT if reaches here, move assignment is trivial\n value_storage_nontrivial(value_storage_nontrivial &&o) noexcept(std::is_nothrow_move_constructible::value) // NOLINT\n : _status(o._status)\n {\n if(this->_status & status_have_value)\n {\n this->_status &= ~status_have_value;\n new(&_value) value_type(std::move(o._value)); // NOLINT\n _status = o._status;\n }\n }\n value_storage_nontrivial(const value_storage_nontrivial &o) noexcept(std::is_nothrow_copy_constructible::value)\n : _status(o._status)\n {\n if(this->_status & status_have_value)\n {\n this->_status &= ~status_have_value;\n new(&_value) value_type(o._value); // NOLINT\n _status = o._status;\n }\n }\n // Special from-void constructor, constructs default T if void valued\n explicit value_storage_nontrivial(const value_storage_trivial &o) noexcept(std::is_nothrow_default_constructible::value)\n : _status(o._status)\n {\n if(this->_status & status_have_value)\n {\n this->_status &= ~status_have_value;\n new(&_value) value_type; // NOLINT\n _status = o._status;\n }\n }\n explicit value_storage_nontrivial(status_bitfield_type status)\n : _empty()\n , _status(status)\n {\n }\n template \n explicit value_storage_nontrivial(in_place_type_t /*unused*/, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : _value(std::forward(args)...) // NOLINT\n , _status(status_have_value)\n {\n }\n template \n value_storage_nontrivial(in_place_type_t /*unused*/, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : _value(il, std::forward(args)...)\n , _status(status_have_value)\n {\n }\n template static constexpr bool enable_converting_constructor = !std::is_same, value_type>::value && std::is_constructible::value;\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_nontrivial(const value_storage_nontrivial &o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_nontrivial((o._status & status_have_value) != 0 ? value_storage_nontrivial(in_place_type, o._value) : value_storage_nontrivial())\n {\n _status = o._status;\n }\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_nontrivial(const value_storage_trivial &o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_nontrivial((o._status & status_have_value) != 0 ? value_storage_nontrivial(in_place_type, o._value) : value_storage_nontrivial())\n {\n _status = o._status;\n }\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_nontrivial(value_storage_nontrivial &&o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_nontrivial((o._status & status_have_value) != 0 ? value_storage_nontrivial(in_place_type, std::move(o._value)) : value_storage_nontrivial())\n {\n _status = o._status;\n }\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(enable_converting_constructor))\n constexpr explicit value_storage_nontrivial(value_storage_trivial &&o) noexcept(std::is_nothrow_constructible::value)\n : value_storage_nontrivial((o._status & status_have_value) != 0 ? value_storage_nontrivial(in_place_type, std::move(o._value)) : value_storage_nontrivial())\n {\n _status = o._status;\n }\n ~value_storage_nontrivial() noexcept(std::is_nothrow_destructible::value)\n {\n if(this->_status & status_have_value)\n {\n this->_value.~value_type(); // NOLINT\n this->_status &= ~status_have_value;\n }\n }\n constexpr void swap(value_storage_nontrivial &o)\n {\n using std::swap;\n if((_status & status_have_value) == 0 && (o._status & status_have_value) == 0)\n {\n swap(_status, o._status);\n return;\n }\n if((_status & status_have_value) != 0 && (o._status & status_have_value) != 0)\n {\n swap(_value, o._value); // NOLINT\n swap(_status, o._status);\n return;\n }\n // One must be empty and the other non-empty, so use move construction\n if((_status & status_have_value) != 0)\n {\n // Move construct me into other\n new(&o._value) value_type(std::move(_value)); // NOLINT\n this->_value.~value_type(); // NOLINT\n swap(_status, o._status);\n }\n else\n {\n // Move construct other into me\n new(&_value) value_type(std::move(o._value)); // NOLINT\n o._value.~value_type(); // NOLINT\n swap(_status, o._status);\n }\n }\n };\n template struct value_storage_delete_copy_constructor : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_delete_copy_constructor() = default;\n value_storage_delete_copy_constructor(const value_storage_delete_copy_constructor &) = delete;\n value_storage_delete_copy_constructor(value_storage_delete_copy_constructor &&) = default; // NOLINT\n };\n template struct value_storage_delete_copy_assignment : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_delete_copy_assignment() = default;\n value_storage_delete_copy_assignment(const value_storage_delete_copy_assignment &) = default;\n value_storage_delete_copy_assignment(value_storage_delete_copy_assignment &&) = default; // NOLINT\n value_storage_delete_copy_assignment &operator=(const value_storage_delete_copy_assignment &o) = delete;\n value_storage_delete_copy_assignment &operator=(value_storage_delete_copy_assignment &&o) = default; // NOLINT\n };\n template struct value_storage_delete_move_assignment : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_delete_move_assignment() = default;\n value_storage_delete_move_assignment(const value_storage_delete_move_assignment &) = default;\n value_storage_delete_move_assignment(value_storage_delete_move_assignment &&) = default; // NOLINT\n value_storage_delete_move_assignment &operator=(const value_storage_delete_move_assignment &o) = default;\n value_storage_delete_move_assignment &operator=(value_storage_delete_move_assignment &&o) = delete;\n };\n template struct value_storage_delete_move_constructor : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_delete_move_constructor() = default;\n value_storage_delete_move_constructor(const value_storage_delete_move_constructor &) = default;\n value_storage_delete_move_constructor(value_storage_delete_move_constructor &&) = delete;\n };\n template struct value_storage_nontrivial_move_assignment : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_nontrivial_move_assignment() = default;\n value_storage_nontrivial_move_assignment(const value_storage_nontrivial_move_assignment &) = default;\n value_storage_nontrivial_move_assignment(value_storage_nontrivial_move_assignment &&) = default; // NOLINT\n value_storage_nontrivial_move_assignment &operator=(const value_storage_nontrivial_move_assignment &o) = default;\n value_storage_nontrivial_move_assignment &operator=(value_storage_nontrivial_move_assignment &&o) noexcept(std::is_nothrow_move_assignable::value) // NOLINT\n {\n if((this->_status & status_have_value) != 0 && (o._status & status_have_value) != 0)\n {\n this->_value = std::move(o._value); // NOLINT\n }\n else if((this->_status & status_have_value) != 0 && (o._status & status_have_value) == 0)\n {\n this->_value.~value_type(); // NOLINT\n }\n else if((this->_status & status_have_value) == 0 && (o._status & status_have_value) != 0)\n {\n new(&this->_value) value_type(std::move(o._value)); // NOLINT\n }\n this->_status = o._status;\n return *this;\n }\n };\n template struct value_storage_nontrivial_copy_assignment : Base // NOLINT\n {\n using Base::Base;\n using value_type = typename Base::value_type;\n value_storage_nontrivial_copy_assignment() = default;\n value_storage_nontrivial_copy_assignment(const value_storage_nontrivial_copy_assignment &) = default;\n value_storage_nontrivial_copy_assignment(value_storage_nontrivial_copy_assignment &&) = default; // NOLINT\n value_storage_nontrivial_copy_assignment &operator=(value_storage_nontrivial_copy_assignment &&o) = default; // NOLINT\n value_storage_nontrivial_copy_assignment &operator=(const value_storage_nontrivial_copy_assignment &o) noexcept(std::is_nothrow_copy_assignable::value)\n {\n if((this->_status & status_have_value) != 0 && (o._status & status_have_value) != 0)\n {\n this->_value = o._value; // NOLINT\n }\n else if((this->_status & status_have_value) != 0 && (o._status & status_have_value) == 0)\n {\n this->_value.~value_type(); // NOLINT\n }\n else if((this->_status & status_have_value) == 0 && (o._status & status_have_value) != 0)\n {\n new(&this->_value) value_type(o._value); // NOLINT\n }\n this->_status = o._status;\n return *this;\n }\n };\n\n // We don't actually need all of std::is_trivial<>, std::is_trivially_copyable<> is sufficient\n template using value_storage_select_trivality = std::conditional_t>::value, value_storage_trivial, value_storage_nontrivial>;\n template using value_storage_select_move_constructor = std::conditional_t>::value, value_storage_select_trivality, value_storage_delete_move_constructor>>;\n template using value_storage_select_copy_constructor = std::conditional_t>::value, value_storage_select_move_constructor, value_storage_delete_copy_constructor>>;\n template \n using value_storage_select_move_assignment = std::conditional_t>::value, value_storage_select_copy_constructor,\n std::conditional_t>::value, value_storage_nontrivial_move_assignment>, value_storage_delete_copy_assignment>>>;\n template \n using value_storage_select_copy_assignment = std::conditional_t>::value, value_storage_select_move_assignment,\n std::conditional_t>::value, value_storage_nontrivial_copy_assignment>, value_storage_delete_copy_assignment>>>;\n template using value_storage_select_impl = value_storage_select_copy_assignment;\n#ifndef NDEBUG\n // Check is trivial in all ways except default constructibility\n // static_assert(std::is_trivial>::value, \"value_storage_select_impl is not trivial!\");\n // static_assert(std::is_trivially_default_constructible>::value, \"value_storage_select_impl is not trivially default constructible!\");\n static_assert(std::is_trivially_copyable>::value, \"value_storage_select_impl is not trivially copyable!\");\n static_assert(std::is_trivially_assignable, value_storage_select_impl>::value, \"value_storage_select_impl is not trivially assignable!\");\n static_assert(std::is_trivially_destructible>::value, \"value_storage_select_impl is not trivially destructible!\");\n static_assert(std::is_trivially_copy_constructible>::value, \"value_storage_select_impl is not trivially copy constructible!\");\n static_assert(std::is_trivially_move_constructible>::value, \"value_storage_select_impl is not trivially move constructible!\");\n static_assert(std::is_trivially_copy_assignable>::value, \"value_storage_select_impl is not trivially copy assignable!\");\n static_assert(std::is_trivially_move_assignable>::value, \"value_storage_select_impl is not trivially move assignable!\");\n // Also check is standard layout\n static_assert(std::is_standard_layout>::value, \"value_storage_select_impl is not a standard layout type!\");\n#endif\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n /* True if type is the same or constructible. Works around a bug where clang + libstdc++\n pukes on std::is_constructible (this bug is fixed upstream).\n */\n\n\n template struct _is_explicitly_constructible\n {\n static constexpr bool value = std::is_constructible::value;\n };\n template struct _is_explicitly_constructible\n {\n static constexpr bool value = true;\n };\n template struct _is_explicitly_constructible\n {\n static constexpr bool value = false;\n };\n template <> struct _is_explicitly_constructible\n {\n static constexpr bool value = false;\n };\n template static constexpr bool is_explicitly_constructible = _is_explicitly_constructible::value;\n\n template struct _is_implicitly_constructible\n {\n static constexpr bool value = std::is_convertible::value;\n };\n template struct _is_implicitly_constructible\n {\n static constexpr bool value = true;\n };\n template struct _is_implicitly_constructible\n {\n static constexpr bool value = false;\n };\n template <> struct _is_implicitly_constructible\n {\n static constexpr bool value = false;\n };\n template static constexpr bool is_implicitly_constructible = _is_implicitly_constructible::value;\n\n// True if type is nothrow swappable\n#if !0 && (_HAS_CXX17 || __cplusplus >= 201700)\n template using is_nothrow_swappable = std::is_nothrow_swappable;\n#else\n namespace _is_nothrow_swappable\n {\n using namespace std;\n template constexpr inline T &ldeclval();\n template struct is_nothrow_swappable : std::integral_constant\n {\n };\n template struct is_nothrow_swappable(), ldeclval()))> : std::integral_constant(), ldeclval()))>\n {\n };\n } // namespace _is_nothrow_swappable\n template using is_nothrow_swappable = _is_nothrow_swappable::is_nothrow_swappable;\n#endif\n OUTCOME_TEMPLATE(class T, class U)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval() == std::declval()))\n inline bool safe_compare_equal(const T &a, const U &b) noexcept(noexcept(std::declval() == std::declval()))\n {\n // std::cout << \"Taken \" << typeid(T).name() << \" == \" << typeid(U).name() << \" = \" << (a == b) << std::endl;\n return a == b;\n }\n template inline bool safe_compare_equal(T && /*unused*/, U && /*unused*/) noexcept\n {\n // std::cout << \"Fallback \" << typeid(T).name() << \" == \" << typeid(U).name() << \" = false\" << std::endl;\n return false;\n }\n OUTCOME_TEMPLATE(class T, class U)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval() != std::declval()))\n inline bool safe_compare_notequal(const T &a, const U &b) noexcept(noexcept(std::declval() != std::declval()))\n {\n // std::cout << \"Taken \" << typeid(T).name() << \" != \" << typeid(U).name() << \" = \" << (a != b) << std::endl;\n return a != b;\n }\n template inline bool safe_compare_notequal(T && /*unused*/, U && /*unused*/) noexcept\n {\n // std::cout << \"Fallback \" << typeid(T).name() << \" != \" << typeid(U).name() << \" = true\" << std::endl;\n return true;\n }\n\n template constexpr inline void _set_error_is_errno(State & /*unused*/, const E & /*unused*/) {}\n template constexpr inline void _set_error_is_errno(State &state, const std::error_code &error)\n {\n if(error.category() == std::generic_category()\n#ifndef _WIN32\n || error.category() == std::system_category()\n#endif\n )\n {\n state._status |= status_error_is_errno;\n }\n }\n template constexpr inline void _set_error_is_errno(State &state, const std::error_condition &error)\n {\n if(error.category() == std::generic_category()\n#ifndef _WIN32\n || error.category() == std::system_category()\n#endif\n )\n {\n state._status |= status_error_is_errno;\n }\n }\n template constexpr inline void _set_error_is_errno(State &state, const std::errc & /*unused*/) { state._status |= status_error_is_errno; }\n\n template class result_final;\n} // namespace detail\n//! Namespace containing hooks used for intercepting and manipulating result/outcome\nnamespace hooks\n{\n //! Get the sixteen bits of spare storage in a `result` or `outcome`.\n template constexpr inline uint16_t spare_storage(const detail::result_final *r) noexcept;\n //! Sets the sixteen bits of spare storage in a `result` or `outcome`.\n template constexpr inline void set_spare_storage(detail::result_final *r, uint16_t v) noexcept;\n} // namespace hooks\nnamespace policy\n{\n namespace detail\n {\n struct base;\n } // namespace detail\n} // namespace policy\nnamespace detail\n{\n //! Predicate for permitting type to be used in outcome\n template //\n static constexpr bool type_can_be_used_in_result = //\n (!std::is_reference::value //\n && !detail::is_in_place_type_t>::value //\n && !detail::is_success_type::value //\n && !detail::is_failure_type::value //\n && !std::is_array::value //\n && (std::is_void::value || (std::is_object::value //\n && std::is_destructible::value)) //\n );\n\n //! The base implementation type of `result`.\n template //\n OUTCOME_REQUIRES(type_can_be_used_in_result &&type_can_be_used_in_result && (std::is_void::value || std::is_default_constructible::value)) //\n class result_storage\n {\n static_assert(type_can_be_used_in_result, \"The type R cannot be used in a result\");\n static_assert(type_can_be_used_in_result, \"The type S cannot be used in a result\");\n static_assert(std::is_void::value || std::is_default_constructible::value, \"The type S must be void or default constructible\");\n\n friend NoValuePolicy;\n friend struct policy::detail::base;\n template friend class result_storage;\n template friend class result_final;\n template friend constexpr inline uint16_t hooks::spare_storage(const detail::result_final *r) noexcept; // NOLINT\n template friend constexpr inline void hooks::set_spare_storage(detail::result_final *r, uint16_t v) noexcept; // NOLINT\n\n struct disable_in_place_value_type\n {\n };\n struct disable_in_place_error_type\n {\n };\n\n protected:\n using _value_type = std::conditional_t::value, disable_in_place_value_type, R>;\n using _error_type = std::conditional_t::value, disable_in_place_error_type, EC>;\n\n\n\n\n detail::value_storage_select_impl<_value_type> _state;\n\n detail::devoid<_error_type> _error;\n\n public:\n // Used by iostream support to access state\n detail::value_storage_select_impl<_value_type> &__state() { return _state; }\n const detail::value_storage_select_impl<_value_type> &__state() const { return _state; }\n\n protected:\n result_storage() = default;\n result_storage(const result_storage &) = default; // NOLINT\n result_storage(result_storage &&) = default; // NOLINT\n result_storage &operator=(const result_storage &) = default; // NOLINT\n result_storage &operator=(result_storage &&) = default; // NOLINT\n ~result_storage() = default;\n\n template \n constexpr explicit result_storage(in_place_type_t<_value_type> _, Args &&... args) noexcept(std::is_nothrow_constructible<_value_type, Args...>::value)\n : _state{_, std::forward(args)...}\n , _error()\n {\n }\n template \n constexpr result_storage(in_place_type_t<_value_type> _, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible<_value_type, std::initializer_list, Args...>::value)\n : _state{_, il, std::forward(args)...}\n , _error()\n {\n }\n template \n constexpr explicit result_storage(in_place_type_t<_error_type> /*unused*/, Args &&... args) noexcept(std::is_nothrow_constructible<_error_type, Args...>::value)\n : _state{detail::status_have_error}\n , _error(std::forward(args)...)\n {\n detail::_set_error_is_errno(_state, _error);\n }\n template \n constexpr result_storage(in_place_type_t<_error_type> /*unused*/, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible<_error_type, std::initializer_list, Args...>::value)\n : _state{detail::status_have_error}\n , _error{il, std::forward(args)...}\n {\n detail::_set_error_is_errno(_state, _error);\n }\n struct compatible_conversion_tag\n {\n };\n template \n constexpr result_storage(compatible_conversion_tag /*unused*/, const result_storage &o) noexcept(std::is_nothrow_constructible<_value_type, T>::value &&std::is_nothrow_constructible<_error_type, U>::value)\n : _state(o._state)\n , _error(o._error)\n {\n }\n template \n constexpr result_storage(compatible_conversion_tag /*unused*/, const result_storage &o) noexcept(std::is_nothrow_constructible<_value_type, T>::value)\n : _state(o._state)\n , _error(_error_type{})\n {\n }\n template \n constexpr result_storage(compatible_conversion_tag /*unused*/, result_storage &&o) noexcept(std::is_nothrow_constructible<_value_type, T>::value &&std::is_nothrow_constructible<_error_type, U>::value)\n : _state(std::move(o._state))\n , _error(std::move(o._error))\n {\n }\n template \n constexpr result_storage(compatible_conversion_tag /*unused*/, result_storage &&o) noexcept(std::is_nothrow_constructible<_value_type, T>::value)\n : _state(std::move(o._state))\n , _error(_error_type{})\n {\n }\n };\n} // namespace detail\nOUTCOME_V2_NAMESPACE_END\n\n#endif\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n //! The exception observers implementation of `outcome`. Only appears separate due to standardese limitations.\n template class outcome_exception_observers : public Base\n {\n public:\n using exception_type = P;\n using Base::Base;\n\n /// \\output_section Narrow state observers\n /*! Access exception without runtime checks.\n \\preconditions The outcome to have an exception state, otherwise it is undefined behaviour.\n \\returns Reference to the held `exception_type` according to overload.\n \\group assume_exception\n */\n\n\n\n\n constexpr inline exception_type &assume_exception() & noexcept;\n /// \\group assume_exception\n constexpr inline const exception_type &assume_exception() const &noexcept;\n /// \\group assume_exception\n constexpr inline exception_type &&assume_exception() && noexcept;\n /// \\group assume_exception\n constexpr inline const exception_type &&assume_exception() const &&noexcept;\n\n /// \\output_section Wide state observers\n /*! Access exception with runtime checks.\n \\returns Reference to the held `exception_type` according to overload.\n \\requires The outcome to have an exception state, else whatever `NoValuePolicy` says ought to happen.\n \\group exception\n */\n\n\n\n\n constexpr inline exception_type &exception() &;\n /// \\group exception\n constexpr inline const exception_type &exception() const &;\n /// \\group exception\n constexpr inline exception_type &&exception() &&;\n /// \\group exception\n constexpr inline const exception_type &&exception() const &&;\n };\n\n template class outcome_exception_observers : public Base\n {\n public:\n using Base::Base;\n /// \\output_section Narrow state observers\n /*! Access exception without runtime checks.\n */\n\n constexpr void assume_exception() const noexcept { NoValuePolicy::narrow_exception_check(this); }\n /// \\output_section Wide state observers\n /*! Access exception with runtime checks.\n \\requires The outcome to have an exception state, else whatever `NoValuePolicy` says ought to happen.\n */\n\n\n constexpr void exception() const { NoValuePolicy::wide_exception_check(this); }\n };\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Failure observers for outcome type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_OUTCOME_FAILURE_OBSERVERS_HPP\n#define OUTCOME_OUTCOME_FAILURE_OBSERVERS_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n //! The failure observers implementation of `outcome`. Only appears separate due to standardese limitations.\n template class outcome_failure_observers : public Base\n {\n public:\n using exception_type = std::exception_ptr;\n using Base::Base;\n\n /// \\output_section Synthesising state observers\n /*! Synthesise exception where possible.\n \\requires `trait::has_error_code_v` and `trait::has_exception_ptr_v
` to be true, else it does not appear.\n \\returns A synthesised exception type: if excepted, `exception()`; if errored, `std::make_exception_ptr(std::system_error(error()))`;\n otherwise a default constructed exception type.\n */\n\n\n\n\n exception_type failure() const noexcept\n {\n if((this->_state._status & detail::status_have_exception) != 0)\n {\n return this->exception();\n }\n if((this->_state._status & detail::status_have_error) != 0)\n {\n return std::make_exception_ptr(std::system_error(this->error()));\n }\n return exception_type();\n }\n };\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* A very simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: June 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_RESULT_HPP\n#define OUTCOME_RESULT_HPP\n/* Says how to convert value, error and exception types\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Nov 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_CONVERT_HPP\n#define OUTCOME_CONVERT_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\n//! Namespace for injected convertibility\nnamespace convert\n{\n#if defined(__cpp_concepts)\n /* The `ValueOrNone` concept.\n \\requires That `U::value_type` exists and that `std::declval().has_value()` returns a `bool` and `std::declval().value()` exists.\n */\n\n\n template concept bool ValueOrNone = requires(U a)\n {\n {\n a.has_value()\n }\n ->bool;\n {a.value()};\n };\n /* The `ValueOrError` concept.\n \\requires That `U::value_type` and `U::error_type` exist;\n that `std::declval().has_value()` returns a `bool`, `std::declval().value()` and `std::declval().error()` exists.\n */\n\n\n\n template concept bool ValueOrError = requires(U a)\n {\n {\n a.has_value()\n }\n ->bool;\n {a.value()};\n {a.error()};\n };\n#else\n namespace detail\n {\n struct no_match\n {\n };\n inline no_match match_value_or_none(...);\n inline no_match match_value_or_error(...);\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval().has_value()), OUTCOME_TEXPR(std::declval().value()))\n inline U match_value_or_none(U &&);\n OUTCOME_TEMPLATE(class U)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval().has_value()), OUTCOME_TEXPR(std::declval().value()), OUTCOME_TEXPR(std::declval().error()))\n inline U match_value_or_error(U &&);\n\n template static constexpr bool ValueOrNone = !std::is_same>()))>::value;\n template static constexpr bool ValueOrError = !std::is_same>()))>::value;\n } // namespace detail\n /* The `ValueOrNone` concept.\n \\requires That `U::value_type` exists and that `std::declval().has_value()` returns a `bool` and `std::declval().value()` exists.\n */\n\n\n template static constexpr bool ValueOrNone = detail::ValueOrNone;\n /* The `ValueOrError` concept.\n \\requires That `U::value_type` and `U::error_type` exist;\n that `std::declval().has_value()` returns a `bool`, `std::declval().value()` and `std::declval().error()` exists.\n */\n\n\n\n template static constexpr bool ValueOrError = detail::ValueOrError;\n#endif\n\n namespace detail\n {\n template struct make_type\n {\n template static constexpr T value(U &&v) { return T{in_place_type, std::forward(v).value()}; }\n template static constexpr T error(U &&v) { return T{in_place_type, std::forward(v).error()}; }\n static constexpr T error() { return T{in_place_type}; }\n };\n template struct make_type\n {\n template static constexpr T value(U && /*unused*/) { return T{in_place_type}; }\n template static constexpr T error(U && /*unused*/) { return T{in_place_type}; }\n static constexpr T error() { return T{in_place_type}; }\n };\n } // namespace detail\n\n /*! Default converter for types matching the `ValueOrError` concept.\n You can partially or fully specialise this converter for your own user defined types by\n injecting specialisations into the `convert` namespace.\n */\n\n\n\n template struct value_or_error\n {\n //! False to indicate that this converter wants `result`/`outcome` to reject all other `result`\n static constexpr bool enable_result_inputs = false;\n //! False to indicate that this converter wants `outcome` to reject all other `outcome`\n static constexpr bool enable_outcome_inputs = false;\n /*! Default converter for types matching the `ValueOrError` concept.\n \\requires `std::decay_t` to be the same type as `U`;\n `ValueOrError` to be true, `U`'s `value_type` be constructible into `T`'s `value_type`\n and `U`'s `error_type` be constructible into `T`'s `error_type`.\n */\n\n\n\n\n OUTCOME_TEMPLATE(class X)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(std::is_same>::value //\n &&ValueOrError //\n && (std::is_void::value_type>::value || OUTCOME_V2_NAMESPACE::detail::is_explicitly_constructible::value_type>) //\n &&(std::is_void::error_type>::value || OUTCOME_V2_NAMESPACE::detail::is_explicitly_constructible::error_type>) ))\n constexpr T operator()(X &&v) { return v.has_value() ? detail::make_type::value(std::forward(v)) : detail::make_type::error(std::forward(v)); }\n };\n} // namespace convert\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Finaliser for a very simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_RESULT_FINAL_HPP\n#define OUTCOME_RESULT_FINAL_HPP\n/* Error observers for a very simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_RESULT_ERROR_OBSERVERS_HPP\n#define OUTCOME_RESULT_ERROR_OBSERVERS_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n //! The error observers implementation of `result`.\n template class result_error_observers : public Base\n {\n public:\n using error_type = EC;\n using Base::Base;\n\n /// \\output_section Narrow state observers\n /*! Access error without runtime checks.\n \\preconditions The result to have a failed state, otherwise it is undefined behaviour.\n \\returns Reference to the held `error_type` according to overload.\n \\group assume_error\n */\n\n\n\n\n constexpr error_type &assume_error() & noexcept\n {\n NoValuePolicy::narrow_error_check(static_cast(*this));\n return this->_error;\n }\n /// \\group assume_error\n constexpr const error_type &assume_error() const &noexcept\n {\n NoValuePolicy::narrow_error_check(static_cast(*this));\n return this->_error;\n }\n /// \\group assume_error\n constexpr error_type &&assume_error() && noexcept\n {\n NoValuePolicy::narrow_error_check(static_cast(*this));\n return std::move(this->_error);\n }\n /// \\group assume_error\n constexpr const error_type &&assume_error() const &&noexcept\n {\n NoValuePolicy::narrow_error_check(static_cast(*this));\n return std::move(this->_error);\n }\n\n /// \\output_section Wide state observers\n /*! Access error with runtime checks.\n \\returns Reference to the held `error_type` according to overload.\n \\requires The result to have a failed state, else whatever `NoValuePolicy` says ought to happen.\n \\group error\n */\n\n\n\n\n constexpr error_type &error() &\n {\n NoValuePolicy::wide_error_check(static_cast(*this));\n return this->_error;\n }\n /// \\group error\n constexpr const error_type &error() const &\n {\n NoValuePolicy::wide_error_check(static_cast(*this));\n return this->_error;\n }\n /// \\group error\n constexpr error_type &&error() &&\n {\n NoValuePolicy::wide_error_check(static_cast(*this));\n return std::move(this->_error);\n }\n /// \\group error\n constexpr const error_type &&error() const &&\n {\n NoValuePolicy::wide_error_check(static_cast(*this));\n return std::move(this->_error);\n }\n };\n template class result_error_observers : public Base\n {\n public:\n using Base::Base;\n /// \\output_section Narrow state observers\n /*! Access error without runtime checks.\n */\n\n constexpr void assume_error() const noexcept { NoValuePolicy::narrow_error_check(*this); }\n /// \\output_section Wide state observers\n /*! Access error with runtime checks.\n \\requires The result to have a failed state, else whatever `NoValuePolicy` says ought to happen.\n */\n\n\n constexpr void error() const { NoValuePolicy::wide_error_check(*this); }\n };\n} // namespace detail\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Value observers for a very simple result type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_RESULT_VALUE_OBSERVERS_HPP\n#define OUTCOME_RESULT_VALUE_OBSERVERS_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n //! The value observers implementation of `result`.\n template class result_value_observers : public Base\n {\n public:\n using value_type = R;\n using Base::Base;\n\n /// \\output_section Narrow state observers\n /*! Access value without runtime checks.\n \\preconditions The result to have a successful state, otherwise it is undefined behaviour.\n \\returns Reference to the held `value_type` according to overload.\n \\group assume_value\n */\n\n\n\n\n constexpr value_type &assume_value() & noexcept\n {\n NoValuePolicy::narrow_value_check(static_cast(*this));\n return this->_state._value; // NOLINT\n }\n /// \\group assume_value\n constexpr const value_type &assume_value() const &noexcept\n {\n NoValuePolicy::narrow_value_check(static_cast(*this));\n return this->_state._value; // NOLINT\n }\n /// \\group assume_value\n constexpr value_type &&assume_value() && noexcept\n {\n NoValuePolicy::narrow_value_check(static_cast(*this));\n return std::move(this->_state._value); // NOLINT\n }\n /// \\group assume_value\n constexpr const value_type &&assume_value() const &&noexcept\n {\n NoValuePolicy::narrow_value_check(static_cast(*this));\n return std::move(this->_state._value); // NOLINT\n }\n\n /// \\output_section Wide state observers\n /*! Access value with runtime checks.\n \\returns Reference to the held `value_type` according to overload.\n \\requires The result to have a successful state, else whatever `NoValuePolicy` says ought to happen.\n \\group value\n */\n\n\n\n\n constexpr value_type &value() &\n {\n NoValuePolicy::wide_value_check(static_cast(*this));\n return this->_state._value; // NOLINT\n }\n /// \\group value\n constexpr const value_type &value() const &\n {\n NoValuePolicy::wide_value_check(static_cast(*this));\n return this->_state._value; // NOLINT\n }\n /// \\group value\n constexpr value_type &&value() &&\n {\n NoValuePolicy::wide_value_check(static_cast(*this));\n return std::move(this->_state._value); // NOLINT\n }\n /// \\group value\n constexpr const value_type &&value() const &&\n {\n NoValuePolicy::wide_value_check(static_cast(*this));\n return std::move(this->_state._value); // NOLINT\n }\n };\n template class result_value_observers : public Base\n {\n public:\n using Base::Base;\n\n /// \\output_section Narrow state observers\n /*! Access value without runtime checks.\n */\n\n constexpr void assume_value() const noexcept { NoValuePolicy::narrow_value_check(*this); }\n /// \\output_section Wide state observers\n /*! Access value with runtime checks.\n \\requires The result to have a successful state, else whatever `NoValuePolicy` says ought to happen.\n */\n\n\n constexpr void value() const { NoValuePolicy::wide_value_check(*this); }\n };\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n template using select_result_impl = result_error_observers, R, NoValuePolicy>, EC, NoValuePolicy>;\n\n //! The assembled implementation type of `result`.\n template \n class result_final\n\n\n\n : public select_result_impl\n\n {\n using base = select_result_impl;\n\n public:\n using base::base;\n\n /// \\output_section State check observers\n /*! Checks if has value.\n \\returns True if has value.\n */\n\n\n constexpr explicit operator bool() const noexcept { return (this->_state._status & detail::status_have_value) != 0; }\n /*! Checks if has value.\n \\returns True if has value.\n */\n\n\n constexpr bool has_value() const noexcept { return (this->_state._status & detail::status_have_value) != 0; }\n /*! Checks if has error.\n \\returns True if has error.\n */\n\n\n constexpr bool has_error() const noexcept { return (this->_state._status & detail::status_have_error) != 0; }\n /*! Checks if has exception.\n \\returns True if has exception.\n */\n\n\n constexpr bool has_exception() const noexcept { return (this->_state._status & detail::status_have_exception) != 0; }\n /*! Checks if has error or exception.\n \\returns True if has error or exception.\n */\n\n\n constexpr bool has_failure() const noexcept { return (this->_state._status & detail::status_have_error) != 0 && (this->_state._status & detail::status_have_exception) != 0; }\n\n /// \\output_section Comparison operators\n /*! True if equal to the other result.\n \\param o The other result to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on each\n of the two stored items returning true if both are true. Otherwise returns false.\n \\throws Any exception the individual `operator==` operations might throw.\n */\n\n\n\n\n\n\n template \n constexpr bool operator==(const result_final &o) const noexcept( //\n noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())))\n {\n if(this->_state._status == o._state._status)\n {\n if(this->_state._status & detail::status_have_value)\n {\n return detail::safe_compare_equal(this->_state._value, o._state._value) && detail::safe_compare_equal(this->_error, o._error); // NOLINT\n }\n return detail::safe_compare_equal(this->_error, o._error);\n }\n return false;\n }\n /*! True if equal to the success type sugar.\n \\param o The success type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the successful item returning true if equal. Otherwise returns false.\n \\throws Any exception the `operator==` operation might throw.\n */\n\n\n\n\n\n template constexpr bool operator==(const success_type &o) const noexcept(noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())))\n {\n if(this->_state._status & detail::status_have_value)\n {\n return detail::safe_compare_equal(this->_state._value, o._value); // NOLINT\n }\n return false;\n }\n /*! True if equal to the success type sugar.\n \\param o The success type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the successful item returning true if equal. Otherwise returns false.\n \\throws Any exception the `operator==` operation might throw.\n */\n\n\n\n\n\n constexpr bool operator==(const success_type &o) const noexcept\n {\n (void) o;\n return static_cast(this->_state._status & detail::status_have_value);\n }\n /*! True if equal to the failure type sugar.\n \\param o The failure type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the failure item returning true if equal. Otherwise returns false.\n \\throws Any exception the `operator==` operation might throw.\n */\n\n\n\n\n\n template constexpr bool operator==(const failure_type &o) const noexcept(noexcept(detail::safe_compare_equal(std::declval>(), std::declval>()))) { return detail::safe_compare_equal(this->_error, o.error()); }\n /*! True if not equal to the other result.\n \\param o The other result to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on each\n of the two stored items, returning true if any are not equal. Otherwise returns true.\n \\throws Any exception the individual `operator!=` operations might throw.\n */\n\n\n\n\n\n\n template \n constexpr bool operator!=(const result_final &o) const noexcept( //\n noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())))\n {\n if(this->_state._status != o._state._status)\n {\n return true;\n }\n if(this->_state._status & detail::status_have_value)\n {\n if(detail::safe_compare_notequal(this->_state._value, o._state._value)) // NOLINT\n {\n return true;\n }\n }\n return detail::safe_compare_notequal(this->_error, o._error);\n }\n /*! True if not equal to the success type sugar.\n \\param o The success type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the successful item returning true if not equal. Otherwise returns false.\n \\throws Any exception the `operator!=` operation might throw.\n */\n\n\n\n\n\n template constexpr bool operator!=(const success_type &o) const noexcept(noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())))\n {\n if(this->_state._status & detail::status_have_value)\n {\n return detail::safe_compare_notequal(this->_state._value, o._value); // NOLINT\n }\n return true;\n }\n /*! True if not equal to the success type sugar.\n \\param o The success type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the successful item returning true if not equal. Otherwise returns false.\n \\throws Any exception the `operator!=` operation might throw.\n */\n\n\n\n\n\n constexpr bool operator!=(const success_type &o) const noexcept\n {\n (void) o;\n return !static_cast(this->_state._status & detail::status_have_value);\n }\n /*! True if not equal to the failure type sugar.\n \\param o The failure type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the failure item returning true if not equal. Otherwise returns false.\n \\throws Any exception the `operator!=` operation might throw.\n */\n\n\n\n\n\n template constexpr bool operator!=(const failure_type &o) const noexcept(noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>()))) { return detail::safe_compare_notequal(this->_error, o.error()); }\n };\n /*! True if the result is equal to the success type sugar.\n \\param a The success type sugar to compare.\n \\param b The result to compare.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the successful item returning true if equal. Otherwise returns false.\n \\remarks Implemented as `b == a`.\n \\throws Any exception the `operator==` operation might throw.\n */\n\n\n\n\n\n\n\n template constexpr inline bool operator==(const success_type &a, const result_final &b) noexcept(noexcept(b == a)) { return b == a; }\n /*! True if the result is equal to the failure type sugar.\n \\param a The failure type sugar to compare.\n \\param b The result to compare.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the failure item returning true if equal. Otherwise returns false.\n \\remarks Implemented as `b == a`.\n \\throws Any exception the `operator==` operation might throw.\n */\n\n\n\n\n\n\n\n template constexpr inline bool operator==(const failure_type &a, const result_final &b) noexcept(noexcept(b == a)) { return b == a; }\n /*! True if the result is not equal to the success type sugar.\n \\param a The success type sugar to compare.\n \\param b The result to compare.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the successful item returning true if not equal. Otherwise returns false.\n \\remarks Implemented as `b != a`.\n \\throws Any exception the `operator!=` operation might throw.\n */\n\n\n\n\n\n\n\n template constexpr inline bool operator!=(const success_type &a, const result_final &b) noexcept(noexcept(b == a)) { return b != a; }\n /*! True if the result is not equal to the failure type sugar.\n \\param a The failure type sugar to compare.\n \\param b The result to compare.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the failure item returning true if not equal. Otherwise returns false.\n \\remarks Implemented as `b != a`.\n \\throws Any exception the `operator!=` operation might throw.\n */\n\n\n\n\n\n\n\n template constexpr inline bool operator!=(const failure_type &a, const result_final &b) noexcept(noexcept(b == a)) { return b != a; }\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_ALL_NARROW_HPP\n#define OUTCOME_POLICY_ALL_NARROW_HPP\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_DETAIL_COMMON_HPP\n#define OUTCOME_POLICY_DETAIL_COMMON_HPP\n\n\n\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n namespace detail\n {\n struct base\n {\n private:\n template \n static constexpr\n#ifdef _MSC_VER\n __declspec(noreturn)\n#elif defined(__GNUC__) || defined(__clang__)\n __attribute__((noreturn))\n#endif\n void _ub(Impl && /*unused*/)\n {\n assert(false);\n#if defined(__GNUC__) || defined(__clang__)\n __builtin_unreachable();\n#endif\n }\n\n public:\n /*! Performs a narrow check of state, used in the assume_value() functions.\n \\effects None.\n */\n\n\n template static constexpr void narrow_value_check(Impl &&self) noexcept\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n _ub(self);\n }\n }\n /*! Performs a narrow check of state, used in the assume_error() functions\n \\effects None.\n */\n\n\n template static constexpr void narrow_error_check(Impl &&self) noexcept\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n _ub(self);\n }\n }\n /*! Performs a narrow check of state, used in the assume_exception() functions\n \\effects None.\n */\n\n\n template static constexpr void narrow_exception_check(Impl &&self) noexcept\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) == 0)\n {\n _ub(self);\n }\n }\n };\n } // namespace detail\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n /*! Policy which treats wide checks as narrow checks.\n\n Can be used in both `result` and `outcome`.\n */\n\n\n\n struct all_narrow : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions. Calls `narrow_value_check()` and does nothing else.\n \\effects None.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self) { detail::base::narrow_value_check(std::forward(self)); }\n /*! Performs a wide check of state, used in the error() functions. Calls `narrow_error_check()` and does nothing else.\n \\effects None.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self) { detail::base::narrow_error_check(std::forward(self)); }\n /*! Performs a wide check of state, used in the exception() functions. Calls `narrow_exception_check()` and does nothing else.\n \\effects None.\n */\n\n\n template static constexpr void wide_exception_check(Impl &&self) { detail::base::narrow_exception_check(std::forward(self)); }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_RESULT_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP\n#define OUTCOME_POLICY_RESULT_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP\n/* Exception types throwable\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_BAD_ACCESS_HPP\n#define OUTCOME_BAD_ACCESS_HPP\n\n\n\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\n//! Thrown when you try to access state in a `result` which isn't present.\nclass OUTCOME_SYMBOL_VISIBLE bad_result_access : public std::logic_error\n{\npublic:\n explicit bad_result_access(const char *what)\n : std::logic_error(what)\n {\n }\n};\n\n//! Thrown when you try to access a value in a `result` which isn't present.\ntemplate class OUTCOME_SYMBOL_VISIBLE bad_result_access_with : public bad_result_access\n{\n S _error;\n\npublic:\n explicit bad_result_access_with(S v)\n : bad_result_access(\"no value\")\n , _error(std::move(v))\n {\n }\n //! Observes the error\n //! \\group result_error\n const S &error() const & { return _error; }\n //! \\group result_error\n S &error() & { return _error; }\n //! \\group result_error\n const S &&error() const && { return _error; }\n //! \\group result_error\n S &&error() && { return _error; }\n};\n\n//! Thrown when you try to access state in a `outcome` which isn't present.\nclass OUTCOME_SYMBOL_VISIBLE bad_outcome_access : public std::logic_error\n{\npublic:\n explicit bad_outcome_access(const char *what)\n : std::logic_error(what)\n {\n }\n};\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n template struct error_code_throw_as_system_error;\n /*! Policy interpreting `EC` as a type for which `trait::has_error_code_v` is true.\n Any wide attempt to access the successful state where there is none causes:\n\n 1. If `trait::has_error_payload_v` is true, it calls an\n ADL discovered free function `throw_as_system_error_with_payload(.error())`.\n 2. If `trait::has_error_payload_v` is false, it calls `OUTCOME_THROW_EXCEPTION(std::system_error(policy::error_code(.error())))`\n */\n\n\n\n\n\n\n template struct error_code_throw_as_system_error : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions.\n \\effects See description of class for effects.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0)\n {\n // ADL discovered\n throw_as_system_error_with_payload(std::forward(self)._error);\n }\n OUTCOME_THROW_EXCEPTION(bad_result_access(\"no value\"));\n }\n }\n /*! Performs a wide check of state, used in the error() functions\n \\effects If result does not have an error, it throws `bad_result_access`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_result_access(\"no error\"));\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_RESULT_EXCEPTION_PTR_RETHROW_HPP\n#define OUTCOME_POLICY_RESULT_EXCEPTION_PTR_RETHROW_HPP\n\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n /*! Policy interpreting `EC` or `E` as a type for which `trait::has_exception_ptr_v` is true.\n Any wide attempt to access the successful state where there is none causes:\n `std::rethrow_exception(policy::exception_ptr(.error()|.exception()))` appropriately.\n */\n\n\n\n template struct exception_ptr_rethrow;\n template struct exception_ptr_rethrow : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions\n \\effects If result does not have a value, if it has an error it rethrows that error via `std::rethrow_exception()`, else it throws `bad_result_access`.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0)\n {\n std::rethrow_exception(policy::exception_ptr(std::forward(self)._error));\n }\n OUTCOME_THROW_EXCEPTION(bad_result_access(\"no value\"));\n }\n }\n /*! Performs a wide check of state, used in the value() functions\n \\effects If result does not have a value, if it has an error it throws that error, else it throws `bad_result_access`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_result_access(\"no error\"));\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_TERMINATE_HPP\n#define OUTCOME_POLICY_TERMINATE_HPP\n\n\n\n#include \n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n /*! Policy implementing any wide attempt to access the successful state as calling `std::terminate`\n\n Can be used in both `result` and `outcome`.\n */\n\n\n\n struct terminate : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions.\n \\effects If result does not have a value, calls `std::terminate()`.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n std::terminate();\n }\n }\n /*! Performs a wide check of state, used in the error() functions\n \\effects If result does not have an error, calls `std::terminate()`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self) noexcept\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n std::terminate();\n }\n }\n /*! Performs a wide check of state, used in the exception() functions\n \\effects If outcome does not have an exception, calls `std::terminate()`.\n */\n\n\n template static constexpr void wide_exception_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) == 0)\n {\n std::terminate();\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_THROW_BAD_RESULT_ACCESS_HPP\n#define OUTCOME_POLICY_THROW_BAD_RESULT_ACCESS_HPP\n\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n /*! Policy which throws `bad_result_access_with` or `bad_result_access` during wide checks.\n\n Can be used in `result` only.\n */\n\n\n\n template struct throw_bad_result_access : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions.\n \\effects If result does not have a value, it throws `bad_result_access_with`.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_result_access_with(std::forward(self)._error));\n }\n }\n /*! Performs a wide check of state, used in the error() functions\n \\effects If result does not have an error, it throws `bad_result_access`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_result_access(\"no error\"));\n }\n }\n /*! Performs a wide check of state, used in the exception() functions\n \\effects If result does not have an exception, it throws `bad_outcome_access`.\n */\n\n\n template static constexpr void wide_exception_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no exception\"));\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n#ifdef __clang__\n#pragma clang diagnostic push\n#pragma clang diagnostic ignored \"-Wdocumentation\" // Standardese markup confuses clang\n#endif\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\n//! Namespace for policies\nnamespace policy\n{\n /*! Default policy selector.\n */\n\n template \n using default_policy = std::conditional_t< //\n std::is_void::value && std::is_void::value,\n terminate, //\n std::conditional_t< //\n trait::has_error_code_v, error_code_throw_as_system_error, //\n std::conditional_t< //\n trait::has_exception_ptr_v || trait::has_exception_ptr_v, exception_ptr_rethrow, //\n all_narrow //\n >>>;\n} // namespace policy\n\ntemplate > //\n#if !defined(__GNUC__) || __GNUC__ >= 8 // GCC's constraints implementation is buggy\nOUTCOME_REQUIRES(detail::type_can_be_used_in_result &&detail::type_can_be_used_in_result && (std::is_void::value || std::is_default_constructible::value)) //\n#endif\nclass result;\n\nnamespace detail\n{\n // These are reused by outcome to save load on the compiler\n template struct result_predicates\n {\n // Is this a common error type?\n static constexpr bool error_is_common_error_type = //\n trait::has_error_code_v || trait::has_exception_ptr_v;\n\n // Predicate for the implicit constructors to be available\n static constexpr bool implicit_constructors_enabled = //\n ((error_is_common_error_type && std::is_same>::value) || !detail::is_implicitly_constructible) //\n &&!detail::is_implicitly_constructible;\n\n // Predicate for the value converting constructor to be available.\n template \n static constexpr bool enable_value_converting_constructor = //\n implicit_constructors_enabled //\n && !is_in_place_type_t>::value // not in place construction\n && detail::is_implicitly_constructible && !detail::is_implicitly_constructible;\n\n // Predicate for the error converting constructor to be available.\n template \n static constexpr bool enable_error_converting_constructor = //\n implicit_constructors_enabled //\n && !is_in_place_type_t>::value // not in place construction\n && !detail::is_implicitly_constructible && detail::is_implicitly_constructible;\n\n // Predicate for the error condition converting constructor to be available.\n template \n static constexpr bool enable_error_condition_converting_constructor = //\n !is_in_place_type_t>::value // not in place construction\n && std::is_error_condition_enum::value // is an error condition enum\n && !detail::is_implicitly_constructible && !detail::is_implicitly_constructible; // not constructible via any other means\n\n // Predicate for the converting copy constructor from a compatible input to be available.\n template \n static constexpr bool enable_compatible_conversion = //\n (std::is_void::value || detail::is_explicitly_constructible::value_type>) // if our value types are constructible\n &&(std::is_void::value || detail::is_explicitly_constructible::error_type>) // if our error types are constructible\n ;\n\n // Predicate for the implicit converting inplace constructor from a compatible input to be available.\n struct disable_inplace_value_error_constructor;\n template \n using choose_inplace_value_error_constructor = std::conditional_t< //\n std::is_constructible::value && std::is_constructible::value, //\n disable_inplace_value_error_constructor, //\n std::conditional_t< //\n std::is_constructible::value, //\n value_type, //\n std::conditional_t< //\n std::is_constructible::value, //\n error_type, //\n disable_inplace_value_error_constructor>>>;\n template \n static constexpr bool enable_inplace_value_error_constructor = implicit_constructors_enabled //\n && !std::is_same, disable_inplace_value_error_constructor>::value;\n };\n\n template constexpr inline const U &extract_value_from_success(const success_type &v) { return v.value(); }\n template constexpr inline U &&extract_value_from_success(success_type &&v) { return std::move(v).value(); }\n template constexpr inline T extract_value_from_success(const success_type & /*unused*/) { return T{}; }\n\n template constexpr inline const U &extract_error_from_failure(const failure_type &v) { return v.error(); }\n template constexpr inline U &&extract_error_from_failure(failure_type &&v) { return std::move(v).error(); }\n template constexpr inline T extract_error_from_failure(const failure_type & /*unused*/) { return T{}; }\n\n template struct is_result : std::false_type\n {\n };\n template struct is_result> : std::true_type\n {\n };\n} // namespace detail\n\n//! True if a result\ntemplate using is_result = detail::is_result>;\n//! True if a result\ntemplate static constexpr bool is_result_v = detail::is_result>::value;\n\n//! Namespace for ADL discovered hooks into events in `result` and `outcome`.\nnamespace hooks\n{\n /*! The default instantiation hook implementation called when a `result` is first created\n by conversion from one of its possible types. Does nothing.\n \\param 1 Some `result<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_result_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `result` is created by copying\n from another `result`. Does nothing.\n \\param 1 Some `result<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_result_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `result` is created by moving\n from another `result`. Does nothing.\n \\param 1 Some `result<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_result_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `result` is created by in place\n construction. Does nothing.\n \\param 1 Some `result<...>` being constructed.\n \\param 2 The type of in place construction occurring.\n \\param 3 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n\n template constexpr inline void hook_result_in_place_construction(T * /*unused*/, in_place_type_t /*unused*/, Args &&... /*unused*/) noexcept {}\n\n //! Retrieves the 16 bits of spare storage in result/outcome.\n template constexpr inline uint16_t spare_storage(const detail::result_final *r) noexcept { return (r->_state._status >> detail::status_2byte_shift) & 0xffff; }\n //! Sets the 16 bits of spare storage in result/outcome.\n template constexpr inline void set_spare_storage(detail::result_final *r, uint16_t v) noexcept { r->_state._status |= (v << detail::status_2byte_shift); }\n} // namespace hooks\n\n/*! Used to return from functions either (i) a successful value (ii) a cause of failure. `constexpr` capable.\n\n\\tparam R The optional type of the successful result (use `void` to disable). Cannot be a reference, a `in_place_type_t<>`, `success<>`, `failure<>`, an array, a function or non-destructible.\n\\tparam S The optional type of the failure result (use `void` to disable). Must be either `void` or `DefaultConstructible`. Cannot be a reference, a `in_place_type_t<>`, `success<>`, `failure<>`, an array, a function or non-destructible.\n\\tparam NoValuePolicy Policy on how to interpret type `S` when a wide observation of a not present value occurs.\n\nAny `R` (`value_type`) state can be observed using the member functions `.value()` and `.assume_value()`. Any `S` (`error_type`) state can be\nobserved using the member functions `.error()` and `.assume_error()`.\n\n`NoValuePolicy` defaults to a policy selected according to the characteristics of type `S`:\n\n1. If `.value()` called when there is no `value_type` but there is an `error_type`:\n - If \\verbatim {{\">}} \\end is true,\nthen `throw std::system_error(error()|make_error_code(error()))` [\\verbatim {{\">}} \\end]\n - If \\verbatim {{\">}} \\end is true, then `std::rethrow_exception(error()|make_exception_ptr(error()))`\n[\\verbatim {{\">}} \\end]\n - If `S` is `void`, call `std::terminate()` [\\verbatim {{}} \\end]\n - If `S` is none of the above, then it is undefined behaviour [\\verbatim {{}} \\end]\n2. If `.error()` called when there is no `error_type`:\n - If `trait::has_error_code_v`, or if `trait::has_exception_ptr_v`,\nor if `S` is `void`, do `throw bad_result_access()`\n - If `S` is none of the above, then it is undefined behaviour [`policy::all_narrow`]\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\ntemplate //\n#if !defined(__GNUC__) || __GNUC__ >= 8 // GCC's constraints implementation is buggy\nOUTCOME_REQUIRES(detail::type_can_be_used_in_result &&detail::type_can_be_used_in_result && (std::is_void::value || std::is_default_constructible::value)) //\n#endif\nclass OUTCOME_NODISCARD result : public detail::result_final\n{\n static_assert(detail::type_can_be_used_in_result, \"The type R cannot be used in a result\");\n static_assert(detail::type_can_be_used_in_result, \"The type S cannot be used in a result\");\n static_assert(std::is_void::value || std::is_default_constructible::value, \"The type S must be void or default constructible\");\n\n using base = detail::result_final;\n\n struct value_converting_constructor_tag\n {\n };\n struct error_converting_constructor_tag\n {\n };\n struct error_condition_converting_constructor_tag\n {\n };\n struct explicit_valueornone_converting_constructor_tag\n {\n };\n struct explicit_valueorerror_converting_constructor_tag\n {\n };\n\npublic:\n /// \\output_section Member types\n //! The success type.\n using value_type = R;\n //! The failure type.\n using error_type = S;\n\n //! Used to disable in place type construction when `value_type` and `error_type` are ambiguous.\n using value_type_if_enabled = typename base::_value_type;\n //! Used to disable in place type construction when `value_type` and `error_type` are ambiguous.\n using error_type_if_enabled = typename base::_error_type;\n\n //! Used to rebind this result to a different result type.\n template > using rebind = result;\n\nprotected:\n //! Requirement predicates for result.\n struct predicate\n {\n using base = detail::result_predicates;\n\n //! Predicate for the value converting constructor to be available.\n template \n static constexpr bool enable_value_converting_constructor = //\n !std::is_same, result>::value // not my type\n && base::template enable_value_converting_constructor;\n\n //! Predicate for the error converting constructor to be available.\n template \n static constexpr bool enable_error_converting_constructor = //\n !std::is_same, result>::value // not my type\n && base::template enable_error_converting_constructor;\n\n //! Predicate for the error condition converting constructor to be available.\n template \n static constexpr bool enable_error_condition_converting_constructor = //\n !std::is_same, result>::value // not my type\n && base::template enable_error_condition_converting_constructor;\n\n //! Predicate for the converting copy constructor from a compatible input to be available.\n template \n static constexpr bool enable_compatible_conversion = //\n !std::is_same, result>::value // not my type\n && base::template enable_compatible_conversion;\n\n //! Predicate for the inplace construction of value to be available.\n template \n static constexpr bool enable_inplace_value_constructor = //\n std::is_void::value //\n || std::is_constructible::value;\n\n //! Predicate for the inplace construction of error to be available.\n template \n static constexpr bool enable_inplace_error_constructor = //\n std::is_void::value //\n || std::is_constructible::value;\n\n // Predicate for the implicit converting inplace constructor to be available.\n template \n static constexpr bool enable_inplace_value_error_constructor = //\n base::template enable_inplace_value_error_constructor;\n template using choose_inplace_value_error_constructor = typename base::template choose_inplace_value_error_constructor;\n };\n\npublic:\n /// \\output_section Default, copy/move constructors and assignment\n //! Default construction is not permitted.\n result() = delete;\n //! Move construction available if `value_type` and `error_type` implement it.\n result(result && /*unused*/) = default; // NOLINT\n //! Copy construction available if `value_type` and `error_type` implement it.\n result(const result & /*unused*/) = default;\n //! Move assignment available if `value_type` and `error_type` implement it.\n result &operator=(result && /*unused*/) = default; // NOLINT\n //! Copy assignment available if `value_type` and `error_type` implement it.\n result &operator=(const result & /*unused*/) = default;\n ~result() = default;\n\n /// \\output_section Converting constructors\n /*! Implicit converting constructor to a successful result.\n \\tparam 1\n \\exclude\n \\param 1\n \\exclude\n \\param t The value from which to initialise the `value_type`.\n\n \\effects Initialises the result with a `value_type`.\n \\requires Type T is implicitly constructible to `value_type`, is not implicitly constructible to `error_type`, and is not `result` and not `in_place_type<>`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_value_converting_constructor))\n constexpr result(T &&t, value_converting_constructor_tag /*unused*/ = value_converting_constructor_tag()) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::forward(t)}\n {\n using namespace hooks;\n hook_result_construction(this, std::forward(t));\n }\n /*! Implicit converting constructor to a failure result.\n \\tparam 1\n \\exclude\n \\param 1\n \\exclude\n \\param t The value from which to initialise the `error_type`.\n\n \\effects Initialises the result with a `error_type`.\n \\requires Type T is implicitly constructible to `error_type`,\n is not implicitly constructible to `value_type`, and is not `result` and not `in_place_type<>`.\n \\throws Any exception the construction of `error_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_error_converting_constructor))\n constexpr result(T &&t, error_converting_constructor_tag /*unused*/ = error_converting_constructor_tag()) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::forward(t)}\n {\n using namespace hooks;\n hook_result_construction(this, std::forward(t));\n }\n /*! Implicit special error condition converting constructor to a failure result.\n \\tparam 1\n \\exclude\n \\tparam 2\n \\exclude\n \\param 1\n \\exclude\n \\param t The error condition from which to initialise the `error_type`.\n\n \\effects Initialises the result with a `error_type` constructed via `make_error_code(t)`.\n \\requires `std::is_error_condition_enum` must be true,\n `ErrorCondEnum` is not implicitly constructible to `value_type` nor `error_type`, and is not `result` and not `in_place_type<>`;\n Finally, the expression `error_type(make_error_code(ErrorCondEnum()))` must be valid.\n \\throws Any exception the construction of `error_type(make_error_code(t))` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class ErrorCondEnum)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(error_type(make_error_code(ErrorCondEnum()))), //\n OUTCOME_TPRED(predicate::template enable_error_condition_converting_constructor))\n constexpr result(ErrorCondEnum &&t, error_condition_converting_constructor_tag /*unused*/ = error_condition_converting_constructor_tag()) noexcept(noexcept(error_type(make_error_code(std::forward(t))))) // NOLINT\n : base{in_place_type, make_error_code(t)}\n {\n using namespace hooks;\n hook_result_construction(this, std::forward(t));\n }\n\n /*! Explicit converting constructor from a compatible `ValueOrError` type.\n \\tparam 1\n \\exclude\n \\tparam 2\n \\exclude\n \\param 1\n \\exclude\n \\param o The input for which a `convert::value_or_error>{}(std::forward(o))` is available.\n\n \\effects Initialises the result with the contents of the compatible input.\n \\requires That `convert::value_or_error>{}(std::forward(o))` be available. The\n default implementation will consume `T`'s matching the `ValueOrError` concept type.\n `ValueOrError` concept matches any type with a `value_type`,\n an `error_type`, a `.value()`, an `.error()` and a `.has_value()`.\n */\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(convert::value_or_error>::enable_result_inputs || !is_result_v), //\n OUTCOME_TEXPR(convert::value_or_error>{}(std::declval())))\n constexpr explicit result(T &&o, explicit_valueorerror_converting_constructor_tag /*unused*/ = explicit_valueorerror_converting_constructor_tag()) // NOLINT\n : result{convert::value_or_error>{}(std::forward(o))}\n {\n }\n /*! Explicit converting copy constructor from a compatible result type.\n \\tparam 3\n \\exclude\n \\param o The compatible result.\n\n \\effects Initialises the result with a copy of the compatible result.\n \\requires Both result's `value_type` and `error_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `value_type(T)` and `error_type(U)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr explicit result(const result &o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), o}\n {\n using namespace hooks;\n hook_result_copy_construction(this, o);\n }\n /*! Explicit converting move constructor from a compatible result type.\n \\tparam 3\n \\exclude\n \\param o The compatible result.\n\n \\effects Initialises the result with a move of the compatible result.\n \\requires Both result's `value_type` and `error_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `value_type(T)` and `error_type(U)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr explicit result(result &&o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), std::move(o)}\n {\n using namespace hooks;\n hook_result_move_construction(this, std::move(o));\n }\n\n /// \\output_section In place constructors\n /*! Explicit inplace constructor to a successful result.\n \\tparam 1\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `value_type`.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the result with a `value_type`.\n \\requires `value_type` is void or `Args...` are constructible to `value_type`.\n \\throws Any exception the construction of `value_type(Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_constructor))\n constexpr explicit result(in_place_type_t _, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : base{_, std::forward(args)...}\n {\n using namespace hooks;\n hook_result_in_place_construction(this, in_place_type, std::forward(args)...);\n }\n /*! Explicit inplace constructor to a successful result.\n \\tparam 2\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `value_type`.\n \\param il An initializer list with which to in place construct.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the result with a `value_type`.\n \\requires The initializer list + `Args...` are constructible to `value_type`.\n \\throws Any exception the construction of `value_type(il, Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class U, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_constructor, Args...>))\n constexpr explicit result(in_place_type_t _, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : base{_, il, std::forward(args)...}\n {\n using namespace hooks;\n hook_result_in_place_construction(this, in_place_type, il, std::forward(args)...);\n }\n /*! Explicit inplace constructor to a failure result.\n \\tparam 1\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `error_type`.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the result with a `error_type`.\n \\requires `error_type` is void or `Args...` are constructible to `error_type`.\n \\throws Any exception the construction of `error_type(Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_error_constructor))\n constexpr explicit result(in_place_type_t _, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : base{_, std::forward(args)...}\n {\n using namespace hooks;\n hook_result_in_place_construction(this, in_place_type, std::forward(args)...);\n }\n /*! Explicit inplace constructor to a failure result.\n \\tparam 2\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `error_type`.\n \\param il An initializer list with which to in place construct.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the result with a `error_type`.\n \\requires The initializer list + `Args...` are constructible to `error_type`.\n \\throws Any exception the construction of `error_type(il, Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class U, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_error_constructor, Args...>))\n constexpr explicit result(in_place_type_t _, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : base{_, il, std::forward(args)...}\n {\n using namespace hooks;\n hook_result_in_place_construction(this, in_place_type, il, std::forward(args)...);\n }\n /*! Implicit inplace constructor to successful or failure result.\n \\tparam 3\n \\exclude\n \\param args Arguments with which to in place construct.\n\n \\effects Calls the appropriate `in_place_type_t<...>` constructor depending on constructibility of args.\n \\requires That the args can construct exactly one of `value_type` or `error_type`.\n \\throws Any exception the `in_place_type_t<...>` constructor might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class A1, class A2, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_error_constructor))\n constexpr result(A1 &&a1, A2 &&a2, Args &&... args) noexcept(noexcept(typename predicate::template choose_inplace_value_error_constructor(std::declval(), std::declval(), std::declval()...)))\n : result(in_place_type>, std::forward(a1), std::forward(a2), std::forward(args)...)\n {\n /* I was a little surprised that the below is needed given that we forward to another constructor.\n But it turns out that ADL only fires on the first constructor for some reason.\n */\n\n\n using namespace hooks;\n // hook_result_in_place_construction(in_place_type>, this);\n }\n\n /// \\output_section Tagged constructors\n /*! Implicit tagged constructor of a successful result.\n \\param o The compatible success type sugar.\n\n \\effects Initialises the result with a default constructed success type.\n \\requires `value_type` to be default constructible, or `void`.\n \\throws Any exception the construction of `value_type()` might throw.\n */\n\n\n\n\n\n\n constexpr result(const success_type &o) noexcept(std::is_nothrow_default_constructible::value) // NOLINT\n : base{in_place_type}\n {\n using namespace hooks;\n hook_result_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a successful result.\n \\tparam 1\n \\exclude\n \\param o The compatible success type sugar.\n\n \\effects Initialises the result with a copy of the value in the type sugar.\n \\requires Both result and success' `value_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr result(const success_type &o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, detail::extract_value_from_success(o)}\n {\n using namespace hooks;\n hook_result_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a successful result.\n \\tparam 1\n \\exclude\n \\param o The compatible success type sugar.\n\n \\effects Initialises the result with a move of the value in the type sugar.\n \\requires Both result and success' `value_type` need to be constructible. The source cannot be `void`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_void::value && predicate::template enable_compatible_conversion))\n constexpr result(success_type &&o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::move(detail::extract_value_from_success(std::move(o)))}\n {\n using namespace hooks;\n hook_result_move_construction(this, std::move(o));\n }\n /*! Implicit tagged constructor of a failure result.\n \\tparam 1\n \\exclude\n \\param o The compatible failure type sugar.\n\n \\effects Initialises the result with a copy of the error in the type sugar.\n \\requires Both result and failure's `error_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `error_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr result(const failure_type &o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, detail::extract_error_from_failure(o)}\n {\n using namespace hooks;\n hook_result_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a failure result.\n \\tparam 1\n \\exclude\n \\param o The compatible failure type sugar.\n\n \\effects Initialises the result with a move of the error in the type sugar.\n \\requires Both result and failure's `error_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `error_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr result(failure_type &&o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::move(detail::extract_error_from_failure(std::move(o)))}\n {\n using namespace hooks;\n hook_result_move_construction(this, std::move(o));\n }\n\n /// \\output_section Swap\n /*! Swaps this result with another result\n \\effects Any `R` and/or `S` is swapped along with the metadata tracking them.\n */\n\n\n void swap(result &o) noexcept(detail::is_nothrow_swappable::value //\n &&detail::is_nothrow_swappable::value)\n {\n using std::swap;\n#ifdef __cpp_exceptions\n#ifdef _MSC_VER\n#pragma warning(push)\n#pragma warning(disable : 4297) // use of throw in noexcept function\n#endif\n this->_state.swap(o._state);\n try\n {\n swap(this->_error, o._error);\n }\n catch(...)\n {\n swap(this->_state, o._state);\n throw;\n }\n#ifdef _MSC_VER\n#pragma warning(pop)\n#endif\n#else\n swap(this->_state, o._state);\n swap(this->_error, o._error);\n#endif\n }\n\n /// \\output_section Converters\n /*! Returns this result as a `failure_type` with any errored state copied.\n \\requires This result to have a failed state, else whatever `assume_error()` would do.\n */\n\n\n auto as_failure() const & { return failure(this->assume_error()); }\n /*! Returns this result as a `failure_type` with any errored state moved.\n \\requires This result to have a failed state, else whatever `assume_error()` would do.\n */\n\n\n auto as_failure() && { return failure(std::move(this->assume_error())); }\n};\n\n/*! Specialise swap for result.\n\\effects Calls `a.swap(b)`.\n*/\n\n\ntemplate inline void swap(result &a, result &b) noexcept(noexcept(a.swap(b)))\n{\n a.swap(b);\n}\n\n#if !defined(NDEBUG)\n// Check is trivial in all ways except default constructibility\n// static_assert(std::is_trivial>::value, \"result is not trivial!\");\n// static_assert(std::is_trivially_default_constructible>::value, \"result is not trivially default constructible!\");\nstatic_assert(std::is_trivially_copyable>::value, \"result is not trivially copyable!\");\nstatic_assert(std::is_trivially_assignable, result>::value, \"result is not trivially assignable!\");\nstatic_assert(std::is_trivially_destructible>::value, \"result is not trivially destructible!\");\nstatic_assert(std::is_trivially_copy_constructible>::value, \"result is not trivially copy constructible!\");\nstatic_assert(std::is_trivially_move_constructible>::value, \"result is not trivially move constructible!\");\nstatic_assert(std::is_trivially_copy_assignable>::value, \"result is not trivially copy assignable!\");\nstatic_assert(std::is_trivially_move_assignable>::value, \"result is not trivially move assignable!\");\n// Also check is standard layout\nstatic_assert(std::is_standard_layout>::value, \"result is not a standard layout type!\");\n#endif\n\n/*! An \"unchecked\" edition of `result` which does no special handling of specific `E` types at all.\nAttempting to access `T` when there is an `E` results in nothing happening at all, it is treated with a narrow\ncontract (i.e. undefined behaviour).\n*/\n\n\n\ntemplate using unchecked = result;\n\n/*! A \"checked\" edition of `result` which resembles fairly closely a `std::expected`.\nAttempting to access `T` when there is an `E` results in `bad_result_access` being thrown. Nothing else.\n\nNote that this approximates the proposed `expected` up for standardisation, see the FAQ for more\ndetail.\n*/\n\n\n\n\n\ntemplate using checked = result>;\n\n\nOUTCOME_V2_NAMESPACE_END\n\n#ifdef __clang__\n#pragma clang diagnostic pop\n#endif\n\n#endif\n#include \n\n#ifdef __clang__\n#pragma clang diagnostic push\n#pragma clang diagnostic ignored \"-Wdocumentation\" // Standardese markup confuses clang\n#endif\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\ntemplate > //\nOUTCOME_REQUIRES(detail::type_can_be_used_in_result
~~&& (std::is_void~~
~~::value || std::is_default_constructible~~
::value)) //\nclass outcome;\n\nnamespace detail\n{\n // May be reused by outcome subclasses to save load on the compiler\n template struct outcome_predicates\n {\n using result = result_predicates;\n\n // Predicate for the implicit constructors to be available\n static constexpr bool implicit_constructors_enabled = //\n result::implicit_constructors_enabled //\n && !detail::is_implicitly_constructible //\n && !detail::is_implicitly_constructible //\n && !detail::is_implicitly_constructible //\n && !detail::is_implicitly_constructible;\n\n // Predicate for the value converting constructor to be available.\n template \n static constexpr bool enable_value_converting_constructor = //\n implicit_constructors_enabled //\n &&result::template enable_value_converting_constructor //\n && !detail::is_implicitly_constructible;\n\n // Predicate for the error converting constructor to be available.\n template \n static constexpr bool enable_error_converting_constructor = //\n implicit_constructors_enabled //\n &&result::template enable_error_converting_constructor //\n && !detail::is_implicitly_constructible;\n\n // Predicate for the error condition converting constructor to be available.\n template \n static constexpr bool enable_error_condition_converting_constructor = result::template enable_error_condition_converting_constructor //\n && !detail::is_implicitly_constructible;\n\n // Predicate for the exception converting constructor to be available.\n template \n static constexpr bool enable_exception_converting_constructor = //\n implicit_constructors_enabled //\n && !is_in_place_type_t>::value // not in place construction\n && !detail::is_implicitly_constructible && !detail::is_implicitly_constructible && detail::is_implicitly_constructible;\n\n // Predicate for the converting copy constructor from a compatible outcome to be available.\n template \n static constexpr bool enable_compatible_conversion = //\n (std::is_void::value || detail::is_explicitly_constructible::value_type>) // if our value types are constructible\n &&(std::is_void::value || detail::is_explicitly_constructible::error_type>) // if our error types are constructible\n &&(std::is_void::value || detail::is_explicitly_constructible::exception_type>) // if our exception types are constructible\n ;\n\n // Predicate for the implicit converting inplace constructor from a compatible input to be available.\n struct disable_inplace_value_error_exception_constructor;\n template \n using choose_inplace_value_error_exception_constructor = std::conditional_t< //\n ((static_cast(std::is_constructible::value) + static_cast(std::is_constructible::value) + static_cast(std::is_constructible::value)) > 1), //\n disable_inplace_value_error_exception_constructor, //\n std::conditional_t< //\n std::is_constructible::value, //\n value_type, //\n std::conditional_t< //\n std::is_constructible::value, //\n error_type, //\n std::conditional_t< //\n std::is_constructible::value, //\n exception_type, //\n disable_inplace_value_error_exception_constructor>>>>;\n template \n static constexpr bool enable_inplace_value_error_exception_constructor = //\n implicit_constructors_enabled && !std::is_same, disable_inplace_value_error_exception_constructor>::value;\n };\n\n template using select_outcome_impl2 = detail::outcome_exception_observers, R, S, P, NoValuePolicy>;\n template using select_outcome_impl = std::conditional_t && trait::has_exception_ptr_v
, detail::outcome_failure_observers, R, S, P, NoValuePolicy>, select_outcome_impl2>;\n\n template constexpr inline const V &extract_exception_from_failure(const failure_type &v) { return v.exception(); }\n template constexpr inline V &&extract_exception_from_failure(failure_type &&v) { return std::move(v).exception(); }\n template constexpr inline T extract_exception_from_failure(const failure_type & /*unused*/) { return T{}; }\n\n template struct is_outcome : std::false_type\n {\n };\n template struct is_outcome> : std::true_type\n {\n };\n} // namespace detail\n\n//! True if an outcome\ntemplate using is_outcome = detail::is_outcome>;\n//! True if an outcome\ntemplate static constexpr bool is_outcome_v = detail::is_outcome>::value;\n\nnamespace hooks\n{\n /*! The default instantiation hook implementation called when a `outcome` is first created\n by conversion from one of its possible types. Does nothing.\n \\param 1 Some `outcome<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_outcome_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `outcome` is created by copying\n from another `outcome` or `result`. Does nothing.\n \\param 1 Some `outcome<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_outcome_copy_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `outcome` is created by moving\n from another `outcome` or `result`. Does nothing.\n \\param 1 Some `outcome<...>` being constructed.\n \\param 2 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n template constexpr inline void hook_outcome_move_construction(T * /*unused*/, U && /*unused*/) noexcept {}\n /*! The default instantiation hook implementation called when a `outcome` is created by in place\n construction. Does nothing.\n \\param 1 Some `outcome<...>` being constructed.\n \\param 2 The type of in place construction occurring.\n \\param 3 The source data.\n\n WARNING: The compiler is permitted to elide calls to constructors, and thus this hook may not get called when you think it should!\n */\n\n\n\n\n\n\n\n template constexpr inline void hook_outcome_in_place_construction(T * /*unused*/, in_place_type_t /*unused*/, Args &&... /*unused*/) noexcept {}\n\n //! Used in hook implementations to override the payload/exception to something other than what was constructed.\n template constexpr inline void override_outcome_exception(outcome *o, U &&v) noexcept;\n} // namespace hooks\n\n/*! Used to return from functions one of (i) a successful value (ii) a cause of failure (ii) a different cause of failure. `constexpr` capable.\n\n\\tparam R The optional type of the successful result (use `void` to disable). Cannot be a reference, a `in_place_type_t<>`, `success<>`, `failure<>`, an array, a function or non-destructible.\n\\tparam S The optional type of the first failure result (use `void` to disable). Must be either `void` or `DefaultConstructible`. Cannot be a reference, a `in_place_type_t<>`, `success<>`, `failure<>`, an array, a function or non-destructible.\n\\tparam P The optional type of the second failure result (use `void` to disable). Must be either `void` or `DefaultConstructible`. Cannot be a reference, a `in_place_type_t<>`, `success<>`, `failure<>`, an array, a function or non-destructible.\n\\tparam NoValuePolicy Policy on how to interpret types `S` and `P` when a wide observation of a not present value occurs.\n\nThis is an extension of `result` and it allows an alternative failure to be stored of type `P`, which can be observed\nwith the member functions `.exception()` and `.assume_exception()`. The `P` state takes precedence during no-value observation\nover any `S` state, and it is possible to store `S + P` simultaneously such that `outcome` could have any one the states:\n\n1. `R` (`value_type`)\n2. `S` (`error_type`)\n3. `P` (`exception_type`)\n4. `S + P` (`error_type + exception_type`)\n\nSimilarly to `result`, `NoValuePolicy` defaults to a policy selected according to the characteristics of types `S` and `P`:\n\n1. If `.value()` called when there is no `value_type` but there is an `exception_type`:\n - If \\verbatim {{\" >}} \\end is true,\nthen `std::rethrow_exception(exception()|make_exception_ptr(exception()))`\n[\\verbatim {{\">}} \\end]\n2. If `.value()` called when there is no `value_type` but there is an `error_type`:\n - If \\verbatim {{\" >}} \\end is true,\nthen `throw std::system_error(error()|make_error_code(error()))`\n[\\verbatim {{\">}} \\end]\n - If `trait::has_exception_ptr_v`, then `std::rethrow_exception(error()|make_exception_ptr(error()))`\n[\\verbatim {{\">}} \\end]\n - If `S` is `void`, call `std::terminate()` [\\verbatim {{}} \\end]\n - If `S` is none of the above, then it is undefined behaviour [\\verbatim {{}} \\end]\n3. If `.exception()` called when there is no `exception_type`:\n - If `trait::has_exception_ptr_v
`,\nor if `P` is `void`, do `throw bad_outcome_access()`\n - If `P` is none of the above, then it is undefined behaviour [`policy::all_narrow`]\n4. If `.error()` called when there is no `error_type`:\n - If `trait::has_error_code_v`, or if `trait::has_exception_ptr_v`,\nor if `S` is `void`, do `throw bad_outcome_access()`\n - If `S` is none of the above, then it is undefined behaviour [`policy::all_narrow`]\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\ntemplate //\nOUTCOME_REQUIRES(detail::type_can_be_used_in_result
~~&& (std::is_void~~
~~::value || std::is_default_constructible~~
~~::value)) //\nclass OUTCOME_NODISCARD outcome\n\n\n\n\n\n: public detail::select_outcome_impl\n\n{\n static_assert(detail::type_can_be_used_in_result~~
~~, \"The exception_type cannot be used\");\n static_assert(std::is_void~~
~~::value || std::is_default_constructible~~
::value, \"exception_type must be void or default constructible\");\n using base = detail::select_outcome_impl;\n friend NoValuePolicy;\n friend detail::select_outcome_impl2;\n template friend class outcome;\n template friend constexpr inline void hooks::override_outcome_exception(outcome *o, X &&v) noexcept; // NOLINT\n\n struct value_converting_constructor_tag\n {\n };\n struct error_converting_constructor_tag\n {\n };\n struct error_condition_converting_constructor_tag\n {\n };\n struct exception_converting_constructor_tag\n {\n };\n struct explicit_valueorerror_converting_constructor_tag\n {\n };\n\n struct disable_in_place_value_type\n {\n };\n struct disable_in_place_error_type\n {\n };\n struct disable_in_place_exception_type\n {\n };\n\npublic:\n /// \\output_section Member types\n //! The success type.\n using value_type = R;\n //! The failure type.\n using error_type = S;\n //! The exception type\n using exception_type = P;\n\n //! Used to rebind this outcome to a different outcome type\n template > using rebind = outcome;\n\nprotected:\n //! Requirement predicates for outcome.\n struct predicate\n {\n using base = detail::outcome_predicates;\n\n //! Predicate for the value converting constructor to be available.\n template \n static constexpr bool enable_value_converting_constructor = //\n !std::is_same, outcome>::value // not my type\n && base::template enable_value_converting_constructor;\n\n //! Predicate for the error converting constructor to be available.\n template \n static constexpr bool enable_error_converting_constructor = //\n !std::is_same, outcome>::value // not my type\n && base::template enable_error_converting_constructor;\n\n //! Predicate for the error condition converting constructor to be available.\n template \n static constexpr bool enable_error_condition_converting_constructor = //\n !std::is_same, outcome>::value // not my type\n && base::template enable_error_condition_converting_constructor;\n\n // Predicate for the exception converting constructor to be available.\n template \n static constexpr bool enable_exception_converting_constructor = //\n !std::is_same, outcome>::value // not my type\n && base::template enable_exception_converting_constructor;\n\n //! Predicate for the converting constructor from a compatible input to be available.\n template \n static constexpr bool enable_compatible_conversion = //\n !std::is_same, outcome>::value // not my type\n && base::template enable_compatible_conversion;\n\n //! Predicate for the inplace construction of value to be available.\n template \n static constexpr bool enable_inplace_value_constructor = //\n std::is_void::value //\n || std::is_constructible::value;\n\n //! Predicate for the inplace construction of error to be available.\n template \n static constexpr bool enable_inplace_error_constructor = //\n std::is_void::value //\n || std::is_constructible::value;\n\n //! Predicate for the inplace construction of exception to be available.\n template \n static constexpr bool enable_inplace_exception_constructor = //\n std::is_void::value //\n || std::is_constructible::value;\n\n // Predicate for the implicit converting inplace constructor to be available.\n template \n static constexpr bool enable_inplace_value_error_exception_constructor = //\n base::template enable_inplace_value_error_exception_constructor;\n template using choose_inplace_value_error_exception_constructor = typename base::template choose_inplace_value_error_exception_constructor;\n };\n\npublic:\n //! Used to disable in place type construction when `value_type` is ambiguous with `error_type` or `exception_type`.\n using value_type_if_enabled = std::conditional_t::value || std::is_same::value, disable_in_place_value_type, value_type>;\n //! Used to disable in place type construction when `error_type` is ambiguous with `value_type` or `exception_type`.\n using error_type_if_enabled = std::conditional_t::value || std::is_same::value, disable_in_place_error_type, error_type>;\n //! Used to disable in place type construction when `exception_type` is ambiguous with `value_type` or `error_type`.\n using exception_type_if_enabled = std::conditional_t::value || std::is_same::value, disable_in_place_exception_type, exception_type>;\n\nprotected:\n detail::devoid _ptr;\n\npublic:\n /// \\output_section Converting constructors\n /*! Converting constructor to a successful outcome.\n \\tparam 1\n \\exclude\n \\param 1\n \\exclude\n \\param t The value from which to initialise the `value_type`.\n\n \\effects Initialises the outcome with a `value_type`.\n \\requires Type T is implicitly constructible to `value_type`, is not implicitly constructible to `error_type`, is not implicitly constructible to `exception_type` and is not `outcome` and not `in_place_type<>`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_value_converting_constructor))\n constexpr outcome(T &&t, value_converting_constructor_tag /*unused*/ = value_converting_constructor_tag()) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::forward(t)},\n _ptr()\n {\n using namespace hooks;\n hook_outcome_construction(this, std::forward(t));\n }\n /*! Converting constructor to an errored outcome.\n \\tparam 1\n \\exclude\n \\param 1\n \\exclude\n \\param t The value from which to initialise the `error_type`.\n\n \\effects Initialises the outcome with a `error_type`.\n \\requires Type T is implicitly constructible to `error_type`,\n is not implicitly constructible to `value_type`, is not implicitly constructible to `exception_type`, and is not `outcome` and not `in_place_type<>`.\n \\throws Any exception the construction of `error_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_error_converting_constructor))\n constexpr outcome(T &&t, error_converting_constructor_tag /*unused*/ = error_converting_constructor_tag()) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::forward(t)},\n _ptr()\n {\n using namespace hooks;\n hook_outcome_construction(this, std::forward(t));\n }\n /*! Special error condition converting constructor to an errored outcome.\n \\tparam 1\n \\exclude\n \\tparam 2\n \\exclude\n \\param 1\n \\exclude\n \\param t The error condition from which to initialise the `error_type`.\n\n \\effects Initialises the outcome with a `error_type` constructed via `make_error_code(t)`.\n \\requires `std::is_error_condition_enum` must be true,\n `ErrorCondEnum` is not implicitly constructible to `value_type`, `error_type` nor `exception_type`, and is not `outcome` and not `in_place_type<>`;\n Finally, the expression `error_type(make_error_code(ErrorCondEnum()))` must be valid.\n \\throws Any exception the construction of `error_type(make_error_code(t))` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class ErrorCondEnum)\n OUTCOME_TREQUIRES(OUTCOME_TEXPR(error_type(make_error_code(ErrorCondEnum()))), //\n OUTCOME_TPRED(predicate::template enable_error_condition_converting_constructor))\n constexpr outcome(ErrorCondEnum &&t, error_condition_converting_constructor_tag /*unused*/ = error_condition_converting_constructor_tag()) noexcept(noexcept(error_type(make_error_code(std::forward(t))))) // NOLINT\n : base{in_place_type, make_error_code(t)}\n {\n using namespace hooks;\n hook_outcome_construction(this, std::forward(t));\n }\n /*! Converting constructor to an excepted outcome.\n \\tparam 1\n \\exclude\n \\param 1\n \\exclude\n \\param t The value from which to initialise the `exception_type`.\n\n \\effects Initialises the outcome with a `exception_type`.\n \\requires `trait::is_exception_ptr
` must be true; Type T is implicitly constructible to `exception_type`,\n is not implicitly constructible to `value_type`, is not implicitly constructible to `error_type`, and is not `outcome` and not `in_place_type<>`.\n \\throws Any exception the construction of `exception_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_exception_converting_constructor))\n constexpr outcome(T &&t, exception_converting_constructor_tag /*unused*/ = exception_converting_constructor_tag()) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base(),\n _ptr(std::forward(t))\n {\n using namespace hooks;\n this->_state._status |= detail::status_have_exception;\n hook_outcome_construction(this, std::forward(t));\n }\n\n /*! Explicit converting constructor from a compatible `ValueOrError` type.\n \\tparam 1\n \\exclude\n \\tparam 2\n \\exclude\n \\tparam 3\n \\exclude\n \\param 1\n \\exclude\n \\param o The input for which a `convert::value_or_error>{}(std::forward(o))` is available.\n\n \\effects Initialises the outcome with the contents of the compatible input.\n \\requires That `convert::value_or_error>{}(std::forward(o))` be available. The\n default implementation will consume `T`'s matching the `ValueOrError` concept type.\n `ValueOrError` concept matches any type with a `value_type`,\n an `error_type`, a `.value()`, an `.error()` and a `.has_value()`.\n */\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(convert::value_or_error>::enable_result_inputs || !is_result_v), //\n OUTCOME_TPRED(convert::value_or_error>::enable_outcome_inputs || !is_outcome_v), //\n OUTCOME_TEXPR(convert::value_or_error>{}(std::declval())))\n constexpr explicit outcome(T &&o, explicit_valueorerror_converting_constructor_tag /*unused*/ = explicit_valueorerror_converting_constructor_tag()) // NOLINT\n : outcome{convert::value_or_error>{}(std::forward(o))}\n {\n }\n /*! Explicit converting copy constructor from a compatible outcome type.\n \\tparam 4\n \\exclude\n \\param o The compatible outcome.\n\n \\effects Initialises the outcome with a copy of the compatible outcome.\n \\requires Both outcome's `value_type`, `error_type`, and `exception_type` need to be constructible, or the source `void`.\n \\throws Any exception the construction of `value_type(T)`, `error_type(U)` or `exception_type(V)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V, class W)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr explicit outcome(const outcome &o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), o}\n , _ptr(o._ptr)\n {\n using namespace hooks;\n hook_outcome_copy_construction(this, o);\n }\n /*! Explicit converting move constructor from a compatible outcome type.\n \\tparam 4\n \\exclude\n \\param o The compatible outcome.\n\n \\effects Initialises the outcome with a move of the compatible outcome.\n \\requires Both outcome's `value_type`, `error_type`, and `exception_type` need to be constructible, or the source `void`.\n \\throws Any exception the construction of `value_type(T)`, `error_type(U)` or `exception_type(V)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V, class W)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr explicit outcome(outcome &&o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), std::move(o)}\n , _ptr(std::move(o._ptr))\n {\n using namespace hooks;\n hook_outcome_move_construction(this, std::move(o));\n }\n /*! Explicit converting copy constructor from a compatible result type.\n \\tparam 3\n \\exclude\n \\param o The compatible result.\n\n \\effects Initialises the outcome with a copy of the compatible result.\n \\requires Both outcome's `value_type` and `error_type` need to be constructible, or the source `void`.\n \\throws Any exception the construction of `value_type(T)`, `error_type(U)` or `exception_type()` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(detail::result_predicates::template enable_compatible_conversion))\n constexpr explicit outcome(const result &o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), o}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_copy_construction(this, o);\n }\n /*! Explicit converting move constructor from a compatible result type.\n \\tparam 3\n \\exclude\n \\param o The compatible result.\n\n \\effects Initialises the outcome with a move of the compatible result.\n \\requires Both outcome's `value_type` and `error_type` need to be constructible, or the source `void`.\n \\throws Any exception the construction of `value_type(T)`, `error_type(U)` or `exception_type()` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U, class V)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(detail::result_predicates::template enable_compatible_conversion))\n constexpr explicit outcome(result &&o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value)\n : base{typename base::compatible_conversion_tag(), std::move(o)}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_move_construction(this, std::move(o));\n }\n\n\n /// \\output_section In place constructors\n /*! Inplace constructor to a successful value.\n \\tparam 1\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `value_type`.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with a `value_type`.\n \\requires `value_type` is void or `Args...` are constructible to `value_type`.\n \\throws Any exception the construction of `value_type(Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_constructor))\n constexpr explicit outcome(in_place_type_t _, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : base{_, std::forward(args)...}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_in_place_construction(this, in_place_type, std::forward(args)...);\n }\n /*! Inplace constructor to a successful value.\n \\tparam 2\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `value_type`.\n \\param il An initializer list with which to in place construct.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with a `value_type`.\n \\requires The initializer list + `Args...` are constructible to `value_type`.\n \\throws Any exception the construction of `value_type(il, Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class U, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_constructor, Args...>))\n constexpr explicit outcome(in_place_type_t _, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : base{_, il, std::forward(args)...}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_in_place_construction(this, in_place_type, il, std::forward(args)...);\n }\n /*! Inplace constructor to an unsuccessful error.\n \\tparam 1\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `error_type`.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with a `error_type`.\n \\requires `error_type` is void or `Args...` are constructible to `error_type`.\n \\throws Any exception the construction of `error_type(Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_error_constructor))\n constexpr explicit outcome(in_place_type_t _, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : base{_, std::forward(args)...}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_in_place_construction(this, in_place_type, std::forward(args)...);\n }\n /*! Inplace constructor to an unsuccessful error.\n \\tparam 2\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `error_type`.\n \\param il An initializer list with which to in place construct.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with a `error_type`.\n \\requires The initializer list + `Args...` are constructible to `error_type`.\n \\throws Any exception the construction of `error_type(il, Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class U, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_error_constructor, Args...>))\n constexpr explicit outcome(in_place_type_t _, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : base{_, il, std::forward(args)...}\n , _ptr()\n {\n using namespace hooks;\n hook_outcome_in_place_construction(this, in_place_type, il, std::forward(args)...);\n }\n /*! Inplace constructor to an unsuccessful exception.\n \\tparam 1\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `exception_type`.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with an `exception_type`.\n \\requires `exception_type` is void or `Args...` are constructible to `exception_type`.\n \\throws Any exception the construction of `exception_type(Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_exception_constructor))\n constexpr explicit outcome(in_place_type_t /*unused*/, Args &&... args) noexcept(std::is_nothrow_constructible::value)\n : base()\n , _ptr(std::forward(args)...)\n {\n using namespace hooks;\n this->_state._status |= detail::status_have_exception;\n hook_outcome_in_place_construction(this, in_place_type, std::forward(args)...);\n }\n /*! Inplace constructor to an unsuccessful exception.\n \\tparam 2\n \\exclude\n \\param _ Tag type to indicate we are doing in place construction of `exception_type`.\n \\param il An initializer list with which to in place construct.\n \\param args Arguments with which to in place construct.\n\n \\effects Initialises the outcome with an `exception_type`.\n \\requires The initializer list + `Args...` are constructible to `exception_type`.\n \\throws Any exception the construction of `exception_type(il, Args...)` might throw.\n */\n\n\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class U, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_exception_constructor, Args...>))\n constexpr explicit outcome(in_place_type_t /*unused*/, std::initializer_list il, Args &&... args) noexcept(std::is_nothrow_constructible, Args...>::value)\n : base()\n , _ptr(il, std::forward(args)...)\n {\n using namespace hooks;\n this->_state._status |= detail::status_have_exception;\n hook_outcome_in_place_construction(this, in_place_type, il, std::forward(args)...);\n }\n /*! Implicit inplace constructor to successful value, or unsuccessful error, or unsuccessful exception.\n \\tparam 3\n \\exclude\n \\param args Arguments with which to in place construct.\n\n \\effects Calls the appropriate `in_place_type_t<...>` constructor depending on constructibility of args.\n \\requires That the args can construct exactly one of `value_type` or `error_type` or `exception_type`.\n \\throws Any exception the `in_place_type_t<...>` constructor might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class A1, class A2, class... Args)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_inplace_value_error_exception_constructor))\n constexpr outcome(A1 &&a1, A2 &&a2, Args &&... args) noexcept(noexcept(typename predicate::template choose_inplace_value_error_exception_constructor(std::declval(), std::declval(), std::declval()...)))\n : outcome(in_place_type>, std::forward(a1), std::forward(a2), std::forward(args)...)\n {\n }\n\n /// \\output_section Tagged constructors\n /*! Implicit tagged constructor of a successful outcome.\n \\param o The compatible success type sugar.\n\n \\effects Initialises the outcome with a default constructed success type.\n \\requires `value_type` to be default constructible, or `void`.\n \\throws Any exception the construction of `value_type()` might throw.\n */\n\n\n\n\n\n\n constexpr outcome(const success_type &o) noexcept(std::is_nothrow_default_constructible::value) // NOLINT\n : base{in_place_type}\n {\n using namespace hooks;\n hook_outcome_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a successful outcome.\n \\tparam 1\n \\exclude\n \\param o The compatible success type sugar.\n\n \\effects Initialises the outcome with a copy of the value in the type sugar.\n \\requires Both outcome and success' `value_type` need to be constructible. The source cannot be `void`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_void::value && predicate::template enable_compatible_conversion))\n constexpr outcome(const success_type &o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, detail::extract_value_from_success(o)}\n {\n using namespace hooks;\n hook_outcome_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a successful outcome.\n \\tparam 1\n \\exclude\n \\param o The compatible success type sugar.\n\n \\effects Initialises the outcome with a move of the value in the type sugar.\n \\requires Both outcome and success' `value_type` need to be constructible. The source cannot be `void`.\n \\throws Any exception the construction of `value_type(T)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_void::value && predicate::template enable_compatible_conversion))\n constexpr outcome(success_type &&o) noexcept(std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::move(detail::extract_value_from_success(std::move(o)))}\n {\n using namespace hooks;\n hook_outcome_move_construction(this, std::move(o));\n }\n /*! Implicit tagged constructor of a failure outcome.\n \\tparam 2\n \\exclude\n \\param o The compatible failure type sugar.\n\n \\effects Initialises the outcome with a copy of the error and/or exception in the type sugar.\n \\requires Both outcome and failure's `error_type` and `exception_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `error_type(T)` and/or `exception_type(U)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr outcome(const failure_type &o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, detail::extract_error_from_failure(o)},\n _ptr(detail::extract_exception_from_failure(o))\n {\n if(this->_error == decltype(this->_error){}) // NOLINT\n {\n this->_state._status &= ~detail::status_have_error;\n }\n if(_ptr != decltype(_ptr){})\n {\n this->_state._status |= detail::status_have_exception;\n }\n using namespace hooks;\n hook_outcome_copy_construction(this, o);\n }\n /*! Implicit tagged constructor of a failure outcome.\n \\tparam 2\n \\exclude\n \\param o The compatible failure type sugar.\n\n \\effects Initialises the outcome with a copy of the error and/or exception in the type sugar.\n \\requires Both outcome and failure's `error_type` and `exception_type` need to be constructible, or the source can be `void`.\n \\throws Any exception the construction of `error_type(T)` and/or `exception_type(U)` might throw.\n */\n\n\n\n\n\n\n\n\n OUTCOME_TEMPLATE(class T, class U)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(predicate::template enable_compatible_conversion))\n constexpr outcome(failure_type &&o) noexcept(std::is_nothrow_constructible::value &&std::is_nothrow_constructible::value) // NOLINT\n : base{in_place_type, std::move(detail::extract_error_from_failure(std::move(o)))},\n _ptr(std::move(detail::extract_exception_from_failure(std::move(o))))\n {\n if(this->_error == decltype(this->_error){}) // NOLINT\n {\n this->_state._status &= ~detail::status_have_error;\n }\n if(_ptr != decltype(_ptr){})\n {\n this->_state._status |= detail::status_have_exception;\n }\n using namespace hooks;\n hook_outcome_move_construction(this, std::move(o));\n }\n\n /// \\output_section Comparison operators\n using base::operator==;\n using base::operator!=;\n /*! True if equal to the other outcome.\n \\param o The other outcome to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on each\n of the three stored items returning true if both are true. Otherwise returns false.\n \\throws Any exception the individual `operator==` operations might throw.\n */\n\n\n\n\n\n\n template \n constexpr bool operator==(const outcome &o) const noexcept( //\n noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())))\n {\n if(this->_state._status == o._state._status)\n {\n if(!base::operator==(o))\n {\n return false;\n }\n if((this->_state._status & detail::status_have_exception))\n {\n return detail::safe_compare_equal(this->_ptr, o._ptr);\n }\n }\n return true;\n }\n /*! True if equal to the failure type sugar.\n \\param o The failure type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator==` operation on the failure items returning true if equal. Otherwise returns false.\n \\throws Any exception the `operator==` operations might throw.\n */\n\n\n\n\n\n template \n constexpr bool operator==(const failure_type &o) const noexcept( //\n noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_equal(std::declval>(), std::declval>())))\n {\n if(!(this->_state._status & detail::status_have_exception))\n {\n return false;\n }\n if(this->_state._status & detail::status_have_error)\n {\n if(!detail::safe_compare_equal(this->_error, o.error()))\n {\n return false;\n }\n }\n if((this->_state._status & detail::status_have_exception))\n {\n return detail::safe_compare_equal(this->_ptr, o.exception());\n }\n return true;\n }\n /*! True if not equal to the other outcome.\n \\param o The other outcome to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on each\n of the three stored items, returning true if any are not equal. Otherwise returns true.\n \\throws Any exception the individual `operator!=` operations might throw.\n */\n\n\n\n\n\n\n template \n constexpr bool operator!=(const outcome &o) const noexcept( //\n noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())))\n {\n if(this->_state._status != o._state._status)\n {\n return true;\n }\n if(base::operator!=(o))\n {\n return true;\n }\n if((this->_state._status & detail::status_have_exception))\n {\n return detail::safe_compare_notequal(this->_ptr, o._ptr);\n }\n return false;\n }\n /*! True if not equal to the failure type sugar.\n \\param o The failure type sugar to compare to.\n\n \\effects If a valid expression to do so, calls the `operator!=` operation on the failure items returning true if not equal. Otherwise returns false.\n \\throws Any exception the `operator!=` operations might throw.\n */\n\n\n\n\n\n template \n constexpr bool operator!=(const failure_type &o) const noexcept( //\n noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())) //\n && noexcept(detail::safe_compare_notequal(std::declval>(), std::declval>())))\n {\n if(!(this->_state._status & detail::status_have_exception))\n {\n return true;\n }\n if(this->_state._status & detail::status_have_error)\n {\n if(detail::safe_compare_notequal(this->_error, o.error()))\n {\n return true;\n }\n }\n if((this->_state._status & detail::status_have_exception))\n {\n return detail::safe_compare_notequal(this->_ptr, o.exception());\n }\n return false;\n }\n\n /// \\output_section Swap\n /*! Swaps this result with another result\n \\effects Any `R` and/or `S` is swapped along with the metadata tracking them.\n */\n\n\n void swap(outcome &o) noexcept(detail::is_nothrow_swappable::value //\n &&detail::is_nothrow_swappable::value //\n &&detail::is_nothrow_swappable::value)\n {\n using std::swap;\n#ifdef __cpp_exceptions\n#ifdef _MSC_VER\n#pragma warning(push)\n#pragma warning(disable : 4297) // use of throw in noexcept function\n#endif\n this->_state.swap(o._state);\n try\n {\n swap(this->_error, o._error);\n try\n {\n swap(this->_ptr, o._ptr);\n }\n catch(...)\n {\n swap(this->_state, o._state);\n swap(this->_error, o._error);\n throw;\n }\n }\n catch(...)\n {\n swap(this->_state, o._state);\n throw;\n }\n#ifdef _MSC_VER\n#pragma warning(pop)\n#endif\n#else\n swap(this->_state, o._state);\n swap(this->_error, o._error);\n swap(this->_ptr, o._ptr);\n#endif\n }\n\n /// \\output_section Converters\n /*! Returns this outcome as a `failure_type` with any errored and/or excepted state copied.\n \\requires This outcome to have a failed state, else whatever `assume_error()` would do.\n */\n\n\n failure_type as_failure() const &\n {\n if(this->has_error() && this->has_exception())\n {\n return OUTCOME_V2_NAMESPACE::failure(this->assume_error(), _ptr);\n }\n if(this->has_exception())\n {\n return OUTCOME_V2_NAMESPACE::failure(error_type(), _ptr);\n }\n return OUTCOME_V2_NAMESPACE::failure(this->assume_error(), exception_type());\n }\n\n /*! Returns this outcome as a `failure_type` with any errored and/or excepted state moved.\n \\requires This outcome to have a failed state, else whatever `assume_error()` would do.\n */\n\n\n failure_type as_failure() &&\n {\n if(this->has_error() && this->has_exception())\n {\n return OUTCOME_V2_NAMESPACE::failure(std::move(this->assume_error()), std::move(_ptr));\n }\n if(this->has_exception())\n {\n return OUTCOME_V2_NAMESPACE::failure(error_type(), std::move(_ptr));\n }\n return OUTCOME_V2_NAMESPACE::failure(std::move(this->assume_error()), exception_type());\n }\n};\n\n/*! True if the result is equal to the outcome\n\\tparam 7\n\\exclude\n\\param a The result to compare.\n\\param b The outcome to compare.\n\n\\remarks Implemented as `b == a`.\n\\requires That the expression `b == a` is a valid expression.\n\\throws Any exception that `b == a` might throw.\n*/\n\n\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class T, class U, class V, //\n class R, class S, class P, class N)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval>() == std::declval>()))\nconstexpr inline bool operator==(const result &a, const outcome &b) noexcept( //\nnoexcept(std::declval>() == std::declval>()))\n{\n return b == a;\n}\n/*! True if the result is not equal to the outcome\n\\tparam 7\n\\exclude\n\\param a The result to compare.\n\\param b The outcome to compare.\n\n\\remarks Implemented as `b != a`.\n\\requires That the expression `b != a` is a valid expression.\n\\throws Any exception that `b != a` might throw.\n*/\n\n\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class T, class U, class V, //\n class R, class S, class P, class N)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(std::declval>() != std::declval>()))\nconstexpr inline bool operator!=(const result &a, const outcome &b) noexcept( //\nnoexcept(std::declval>() != std::declval>()))\n{\n return b != a;\n}\n/*! Specialise swap for outcome.\n\\effects Calls `a.swap(b)`.\n*/\n\n\ntemplate inline void swap(outcome &a, outcome &b) noexcept(noexcept(a.swap(b)))\n{\n a.swap(b);\n}\n\nnamespace hooks\n{\n /*! Used to set/override an exception during a construction hook implementation.\n \\param o The outcome you wish to change.\n \\param v Exception to be set.\n\n \\effects Sets the exception of the outcome to the given value.\n */\n\n\n\n\n\n template constexpr inline void override_outcome_exception(outcome *o, U &&v) noexcept\n {\n o->_ptr = std::forward(v);\n o->_state._status |= detail::status_have_exception;\n }\n} // namespace hooks\n\nOUTCOME_V2_NAMESPACE_END\n\n#ifdef __clang__\n#pragma clang diagnostic pop\n#endif\n/* Exception observers for outcome type\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_OUTCOME_EXCEPTION_OBSERVERS_IMPL_HPP\n#define OUTCOME_OUTCOME_EXCEPTION_OBSERVERS_IMPL_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace detail\n{\n template inline constexpr typename outcome_exception_observers::exception_type &outcome_exception_observers::assume_exception() & noexcept\n {\n outcome &self = static_cast &>(*this); // NOLINT\n NoValuePolicy::narrow_exception_check(self);\n return self._ptr;\n }\n template inline constexpr const typename outcome_exception_observers::exception_type &outcome_exception_observers::assume_exception() const &noexcept\n {\n const outcome &self = static_cast &>(*this); // NOLINT\n NoValuePolicy::narrow_exception_check(self);\n return self._ptr;\n }\n template inline constexpr typename outcome_exception_observers::exception_type &&outcome_exception_observers::assume_exception() && noexcept\n {\n outcome &&self = static_cast &&>(*this); // NOLINT\n NoValuePolicy::narrow_exception_check(self);\n return std::move(self._ptr);\n }\n template inline constexpr const typename outcome_exception_observers::exception_type &&outcome_exception_observers::assume_exception() const &&noexcept\n {\n const outcome &&self = static_cast &&>(*this); // NOLINT\n NoValuePolicy::narrow_exception_check(self);\n return std::move(self._ptr);\n }\n\n template inline constexpr typename outcome_exception_observers::exception_type &outcome_exception_observers::exception() &\n {\n outcome &self = static_cast &>(*this); // NOLINT\n NoValuePolicy::wide_exception_check(self);\n return self._ptr;\n }\n template inline constexpr const typename outcome_exception_observers::exception_type &outcome_exception_observers::exception() const &\n {\n const outcome &self = static_cast &>(*this); // NOLINT\n NoValuePolicy::wide_exception_check(self);\n return self._ptr;\n }\n template inline constexpr typename outcome_exception_observers::exception_type &&outcome_exception_observers::exception() &&\n {\n outcome &&self = static_cast &&>(*this); // NOLINT\n NoValuePolicy::wide_exception_check(self);\n return std::move(self._ptr);\n }\n template inline constexpr const typename outcome_exception_observers::exception_type &&outcome_exception_observers::exception() const &&\n {\n const outcome &&self = static_cast &&>(*this); // NOLINT\n NoValuePolicy::wide_exception_check(self);\n return std::move(self._ptr);\n }\n} // namespace detail\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_OUTCOME_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP\n#define OUTCOME_POLICY_OUTCOME_ERROR_CODE_THROW_AS_SYSTEM_ERROR_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n namespace detail\n {\n template struct rethrow_exception\n {\n template explicit rethrow_exception(Exception && /*unused*/) // NOLINT\n {\n }\n };\n template <> struct rethrow_exception\n {\n template explicit rethrow_exception(Exception &&excpt) // NOLINT\n {\n std::rethrow_exception(policy::exception_ptr(std::forward(excpt)));\n }\n };\n } // namespace detail\n\n /*! Policy interpreting `EC` as a type for which `trait::has_error_code_v` is true.\n Any wide attempt to access the successful state where there is none causes\n an attempt to rethrow `E` if `trait::has_exception_ptr_v` is true, else:\n\n 1. If `trait::has_error_payload_v` is true, it calls an\n ADL discovered free function `throw_as_system_error_with_payload(.error())`.\n 2. If `trait::has_error_payload_v` is false, it calls `OUTCOME_THROW_EXCEPTION(std::system_error(policy::error_code(.error())))`\n */\n\n\n\n\n\n\n\n template struct error_code_throw_as_system_error : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions.\n \\effects See description of class for effects.\n */\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) != 0)\n {\n using Outcome = OUTCOME_V2_NAMESPACE::detail::rebind_type, decltype(self)>;\n Outcome _self = static_cast(self); // NOLINT\n detail::rethrow_exception>{std::forward(_self)._ptr};\n }\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0)\n {\n // ADL discovered\n throw_as_system_error_with_payload(std::forward(self)._error);\n }\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no value\"));\n }\n }\n /*! Performs a wide check of state, used in the error() functions\n \\effects If result does not have an error, it throws `bad_outcome_access`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no error\"));\n }\n }\n /*! Performs a wide check of state, used in the exception() functions\n \\effects If result does not have an exception, it throws `bad_outcome_access`.\n */\n\n\n template static constexpr void wide_exception_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no exception\"));\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Policies for result and outcome\n(C) 2017 Niall Douglas (59 commits)\nFile Created: Oct 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_POLICY_OUTCOME_EXCEPTION_PTR_RETHROW_HPP\n#define OUTCOME_POLICY_OUTCOME_EXCEPTION_PTR_RETHROW_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_EXPORT_BEGIN\n\nnamespace policy\n{\n /*! Policy interpreting `EC` or `E` as a type for which `trait::has_exception_ptr_v` is true.\n Any wide attempt to access the successful state where there is none causes:\n `std::rethrow_exception(policy::exception_ptr(.error()|.exception()))` appropriately.\n */\n\n\n\n template struct exception_ptr_rethrow : detail::base\n {\n /*! Performs a wide check of state, used in the value() functions\n \\effects If outcome does not have a value, if it has an exception it rethrows that exception via `std::rethrow_exception()`,\n if it has an error it rethrows that error via `std::rethrow_exception()`, else it throws `bad_outcome_access`.\n */\n\n\n\n template static constexpr void wide_value_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_value) == 0)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) != 0)\n {\n using Outcome = OUTCOME_V2_NAMESPACE::detail::rebind_type, decltype(self)>;\n Outcome _self = static_cast(self); // NOLINT\n detail::rethrow_exception>{std::forward(_self)._ptr};\n }\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) != 0)\n {\n detail::rethrow_exception>{std::forward(self)._error};\n }\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no value\"));\n }\n }\n /*! Performs a wide check of state, used in the error() functions\n \\effects If outcome does not have an error, it throws `bad_outcome_access`.\n */\n\n\n template static constexpr void wide_error_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_error) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no error\"));\n }\n }\n /*! Performs a wide check of state, used in the exception() functions\n \\effects If result does not have an exception, it throws `bad_outcome_access`.\n */\n\n\n template static constexpr void wide_exception_check(Impl &&self)\n {\n if((self._state._status & OUTCOME_V2_NAMESPACE::detail::status_have_exception) == 0)\n {\n OUTCOME_THROW_EXCEPTION(bad_outcome_access(\"no exception\"));\n }\n }\n };\n} // namespace policy\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n#endif\n#include \n#include \n\nOUTCOME_V2_NAMESPACE_BEGIN\n\nnamespace detail\n{\n template typename std::add_lvalue_reference::type lvalueref() noexcept;\n\n template inline std::ostream &operator<<(std::ostream &s, const value_storage_trivial &v)\n {\n s << v._status << \" \";\n if((v._status & status_have_value) != 0)\n {\n s << v._value; // NOLINT\n }\n return s;\n }\n inline std::ostream &operator<<(std::ostream &s, const value_storage_trivial &v)\n {\n s << v._status << \" \";\n return s;\n }\n template inline std::ostream &operator<<(std::ostream &s, const value_storage_nontrivial &v)\n {\n s << v._status << \" \";\n if((v._status & status_have_value) != 0)\n {\n s << v._value; // NOLINT\n }\n return s;\n }\n template inline std::istream &operator>>(std::istream &s, value_storage_trivial &v)\n {\n v = value_storage_trivial();\n s >> v._status;\n if((v._status & status_have_value) != 0)\n {\n new(&v._value) decltype(v._value)(); // NOLINT\n s >> v._value; // NOLINT\n }\n return s;\n }\n inline std::istream &operator>>(std::istream &s, value_storage_trivial> &v)\n {\n v = value_storage_trivial>();\n s >> v._status;\n return s;\n }\n template inline std::istream &operator>>(std::istream &s, value_storage_nontrivial &v)\n {\n v = value_storage_nontrivial();\n s >> v._status;\n if((v._status & status_have_value) != 0)\n {\n new(&v._value) decltype(v._value)(); // NOLINT\n s >> v._value; // NOLINT\n }\n return s;\n }\n OUTCOME_TEMPLATE(class T)\n OUTCOME_TREQUIRES(OUTCOME_TPRED(!std::is_constructible::value))\n inline std::string safe_message(T && /*unused*/) { return {}; }\n inline std::string safe_message(const std::error_code &ec) { return \" (\" + ec.message() + \")\"; }\n} // namespace detail\n\n/*! Deserialise a result. Format is `status_unsigned [value][error]`. Spare storage is preserved.\n\\tparam 3\n\\exclude\n\\tparam 4\n\\exclude\n\n\\requires That `R` and `S` implement `operator>>`.\n*/\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class R, class S, class P)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(detail::lvalueref() >> detail::lvalueref()), OUTCOME_TEXPR(detail::lvalueref() >> detail::lvalueref()))\ninline std::istream &operator>>(std::istream &s, result &v)\n{\n s >> v.__state();\n if(v.has_error())\n {\n s >> v.assume_error();\n }\n return s;\n}\n/*! Serialise a result. Format is `status_unsigned [value][error]`. Spare storage is preserved.\nIf you are printing to a human readable destination, use `print()` instead.\n\\tparam 3\n\\exclude\n\\tparam 4\n\\exclude\n\n\\requires That `R` and `S` implement `operator<<`.\n*/\n\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class R, class S, class P)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(detail::lvalueref() << detail::lvalueref()), OUTCOME_TEXPR(detail::lvalueref() << detail::lvalueref()))\ninline std::ostream &operator<<(std::ostream &s, const result &v)\n{\n s << v.__state();\n if(v.has_error())\n {\n s << v.assume_error();\n }\n return s;\n}\n/*! Debug print a result into a form suitable for human reading. Format is `value|error`. If the\nerror type is `error_code`, appends `\" (ec.message())\"` afterwards.\n*/\n\n\ntemplate inline std::string print(const detail::result_final &v)\n{\n std::stringstream s;\n if(v.has_value())\n {\n s << v.value();\n }\n if(v.has_error())\n {\n s << v.error() << detail::safe_message(v.error());\n }\n return s.str();\n}\n/*! Debug print a result into a form suitable for human reading. Format is `(+void)|error`. If the\nerror type is `error_code`, appends `\" (ec.message())\"` afterwards.\n*/\n\n\ntemplate inline std::string print(const detail::result_final &v)\n{\n std::stringstream s;\n if(v.has_value())\n {\n s << \"(+void)\";\n }\n if(v.has_error())\n {\n s << v.error() << detail::safe_message(v.error());\n }\n return s.str();\n}\n/*! Debug print a result into a form suitable for human reading. Format is `value|(-void)`.\n*/\n\ntemplate inline std::string print(const detail::result_final &v)\n{\n std::stringstream s;\n if(v.has_value())\n {\n s << v.value();\n }\n if(v.has_error())\n {\n s << \"(-void)\";\n }\n return s.str();\n}\n/*! Debug print a result into a form suitable for human reading. Format is `(+void)|(-void)`.\n*/\n\ntemplate inline std::string print(const detail::result_final &v)\n{\n std::stringstream s;\n if(v.has_value())\n {\n s << \"(+void)\";\n }\n if(v.has_error())\n {\n s << \"(-void)\";\n }\n return s.str();\n}\n\n/*! Deserialise an outcome. Format is `status_unsigned [value][error][exception]`. Spare storage is preserved.\n\\tparam 4\n\\exclude\n\\tparam 5\n\\exclude\n\\tparam 6\n\\exclude\n\n\\requires That `R`, `S` and `P` implement `operator>>`.\n*/\n\n\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class R, class S, class P, class N)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(detail::lvalueref() >> detail::lvalueref()), OUTCOME_TEXPR(detail::lvalueref() >> detail::lvalueref~~()), OUTCOME_TEXPR(detail::lvalueref() >> detail::lvalueref~~
()))\ninline std::istream &operator>>(std::istream &s, outcome &v)\n{\n s >> v.__state();\n if(v.has_error())\n {\n s >> v.assume_error();\n }\n if(v.has_exception())\n {\n s >> v.assume_exception();\n }\n return s;\n}\n/*! Serialise an outcome. Format is `status_unsigned [value][error][exception]`. Spare storage is preserved.\nIf you are printing to a human readable destination, use `print()` instead.\n\\tparam 4\n\\exclude\n\\tparam 5\n\\exclude\n\\tparam 6\n\\exclude\n\n\\requires That `R`, `S` and `P` implement `operator<<`.\n*/\n\n\n\n\n\n\n\n\n\n\nOUTCOME_TEMPLATE(class R, class S, class P, class N)\nOUTCOME_TREQUIRES(OUTCOME_TEXPR(detail::lvalueref() << detail::lvalueref()), OUTCOME_TEXPR(detail::lvalueref() << detail::lvalueref~~()), OUTCOME_TEXPR(detail::lvalueref() << detail::lvalueref~~
()))\ninline std::ostream &operator<<(std::ostream &s, const outcome &v)\n{\n s << v.__state();\n if(v.has_error())\n {\n s << v.assume_error();\n }\n if(v.has_exception())\n {\n s << v.assume_exception();\n }\n return s;\n}\n/*! Debug print an outcome into a form suitable for human reading. Format is one of:\n\n1. `value|error|exception`\n2. `{ error, exception }`\n\nIf the error type is `error_code`, appends `\" (ec.message())\"` after the error.\nException type is printed as one of:\n\n1. `std::system_error code code(): what()`\n2. `std::exception: what()`\n3. `unknown exception`\n*/\n\n\n\n\n\n\n\n\n\n\n\ntemplate inline std::string print(const outcome &v)\n{\n std::stringstream s;\n int total = static_cast(v.has_value()) + static_cast(v.has_error()) + static_cast(v.has_exception());\n if(total > 1)\n {\n s << \"{ \";\n }\n s << print(static_cast &>(v));\n if(total > 1)\n {\n s << \", \";\n }\n if(v.has_exception())\n {\n#ifdef __cpp_exceptions\n try\n {\n std::rethrow_exception(v.exception());\n }\n catch(const std::system_error &e)\n {\n s << \"std::system_error code \" << e.code() << \": \" << e.what();\n }\n catch(const std::exception &e)\n {\n s << \"std::exception: \" << e.what();\n }\n catch(...)\n#endif\n {\n s << \"unknown exception\";\n }\n }\n if(total > 1)\n {\n s << \" }\";\n }\n return s.str();\n}\nOUTCOME_V2_NAMESPACE_END\n\n#endif\n/* Try operation macros\n(C) 2017 Niall Douglas (59 commits)\nFile Created: July 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_TRY_HPP\n#define OUTCOME_TRY_HPP\n\n\n\nOUTCOME_V2_NAMESPACE_BEGIN\n\n/*! Customisation point for changing what the `OUTCOME_TRY` macros\ndo. This function defaults to returning `std::forward(v).as_failure()`.\n\\effects Extracts any state apart from value into a `failure_type`.\n\\requires The input value to have a `.as_failure()` member function.\n*/\n\n\n\n\ntemplate OUTCOME_REQUIRES(requires(T &&v){{v.as_failure()}}) decltype(auto) try_operation_return_as(T &&v)\n{\n return std::forward(v).as_failure();\n}\n\nOUTCOME_V2_NAMESPACE_END\n\n//! \\exclude\n#define OUTCOME_TRY_GLUE2(x, y) x##y\n//! \\exclude\n#define OUTCOME_TRY_GLUE(x, y) OUTCOME_TRY_GLUE2(x, y)\n//! \\exclude\n#define OUTCOME_TRY_UNIQUE_NAME OUTCOME_TRY_GLUE(__t, __COUNTER__)\n\n//! \\exclude\n#define OUTCOME_TRYV2(unique, ...) auto && (unique) = (__VA_ARGS__); if(!(unique).has_value()) return OUTCOME_V2_NAMESPACE::try_operation_return_as(std::forward(unique))\n\n\n\n//! \\exclude\n#define OUTCOME_TRY2(unique, v, ...) OUTCOME_TRYV2(unique, __VA_ARGS__); auto && (v) = std::forward(unique).value()\n\n\n\n/*! If the outcome returned by expression ... is not valued, propagate any\nfailure by immediately returning that failure state immediately\n*/\n\n\n#define OUTCOME_TRYV(...) OUTCOME_TRYV2(OUTCOME_TRY_UNIQUE_NAME, __VA_ARGS__)\n\n#if defined(__GNUC__) || defined(__clang__)\n\n/*! If the outcome returned by expression ... is not valued, propagate any\nfailure by immediately returning that failure state immediately, else become the\nunwrapped value as an expression. This makes `OUTCOME_TRYX(expr)` an expression\nwhich can be used exactly like the `try` operator in other languages.\n\n\\remarks This macro makes use of a proprietary extension in GCC and clang and is not\nportable. The macro is not made available on unsupported compilers,\nso you can test for its presence using `#ifdef OUTCOME_TRYX`.\n*/\n\n\n\n\n\n\n\n\n#define OUTCOME_TRYX(...) ({ auto &&res = (__VA_ARGS__); if(!res.has_value()) return OUTCOME_V2_NAMESPACE::try_operation_return_as(std::forward(res)); std::forward(res).value(); })\n\n\n\n\n\n\n\n#endif\n\n/*! If the outcome returned by expression ... is not valued, propagate any\nfailure by immediately returning that failure immediately, else set *v* to the unwrapped value.\n*/\n\n\n#define OUTCOME_TRY(v, ...) OUTCOME_TRY2(OUTCOME_TRY_UNIQUE_NAME, v, __VA_ARGS__)\n\n#endif\n/* Tries to convert an exception ptr into its equivalent error code\n(C) 2017 Niall Douglas (59 commits)\nFile Created: July 2017\n\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License in the accompanying file\nLicence.txt or at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n\nDistributed under the Boost Software License, Version 1.0.\n(See accompanying file Licence.txt or copy at\nhttp://www.boost.org/LICENSE_1_0.txt)\n*/\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n#ifndef OUTCOME_UTILS_HPP\n#define OUTCOME_UTILS_HPP\n\n\n\n#include \n#include \n\nOUTCOME_V2_NAMESPACE_BEGIN\n\n#ifdef __cpp_exceptions\n/*! Utility function which tries to match the exception in the pointer provided\nto an equivalent error code. Ought to work for all standard STL types.\n\\param ep The pointer to an exception to convert. If matched, on exit this is\nreset to a null pointer.\n\\param not_matched The error code to return if we could not match the exception.\nNote that a null pointer in returns a null error code.\n\n\\effects Rethrows the exception in the pointer, and via a long sequence of `catch`\nclauses attempts to match the equivalent error code. If a match is found, the\npointer is reset to null. If a match is not found, *not_matched* is returned instead\nand the pointer is left unmodified.\n*/\n\n\n\n\n\n\n\n\n\n\n\ninline 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\n{\n if(!ep)\n {\n return {};\n }\n try\n {\n std::rethrow_exception(ep);\n }\n catch(const std::invalid_argument & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::invalid_argument);\n }\n catch(const std::domain_error & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::argument_out_of_domain);\n }\n catch(const std::length_error & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::argument_list_too_long);\n }\n catch(const std::out_of_range & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::result_out_of_range);\n }\n catch(const std::logic_error & /*unused*/) /* base class for this group */\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::invalid_argument);\n }\n catch(const std::system_error &e) /* also catches ios::failure */\n {\n ep = std::exception_ptr();\n return e.code();\n }\n catch(const std::overflow_error & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::value_too_large);\n }\n catch(const std::range_error & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::result_out_of_range);\n }\n catch(const std::runtime_error & /*unused*/) /* base class for this group */\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::resource_unavailable_try_again);\n }\n catch(const std::bad_alloc & /*unused*/)\n {\n ep = std::exception_ptr();\n return std::make_error_code(std::errc::not_enough_memory);\n }\n catch(...)\n {\n }\n return not_matched;\n}\n\n/*! Utility function which tries to throw the equivalent STL exception type for\nsome given error code, not including `system_error`.\n\\param ec The error code to try to convert into a STL exception throw.\n\\param msg Optional custom message for the STL exception type.\n\n\\effects If the input error code has a category of `generic_category()` (all platforms)\nor `system_category()` (POSIX only), throw the STL exception type matching\nthe `errno` domained code if one is available. For example, `ENOMEM` would cause\n`std::bad_alloc()` to be thrown.\n*/\n\n\n\n\n\n\n\n\n\ninline void try_throw_std_exception_from_error(std::error_code ec, const std::string &msg = std::string{})\n{\n if(!ec || (ec.category() != std::generic_category()\n#ifndef _WIN32\n && ec.category() != std::system_category()\n#endif\n ))\n {\n return;\n }\n switch(ec.value())\n {\n case EINVAL:\n throw msg.empty() ? std::invalid_argument(\"invalid argument\") : std::invalid_argument(msg);\n case EDOM:\n throw msg.empty() ? std::domain_error(\"domain error\") : std::domain_error(msg);\n case E2BIG:\n throw msg.empty() ? std::length_error(\"length error\") : std::length_error(msg);\n case ERANGE:\n throw msg.empty() ? std::out_of_range(\"out of range\") : std::out_of_range(msg);\n case EOVERFLOW:\n throw msg.empty() ? std::overflow_error(\"overflow error\") : std::overflow_error(msg);\n case ENOMEM:\n throw std::bad_alloc();\n }\n}\n#endif\n\nOUTCOME_V2_NAMESPACE_END\n\n#endif","stdin","compiler","boost-nothing-gcc-head,gnu++2a,cpp-no-pedantic","-lstdc++fs","createdAt",1516344915,"title","description","isPrivate","compilerInfo",{"_11":59,"_13":59,"_15":59,"_17":59,"_19":3403,"_22":25,"_24":25,"_26":59,"_28":3404},[],[],"results",[3407,3411,3414,3417],{"_31":3408,"_3409":3410},"Control","data","Start",{"_31":3412,"_3409":3413},"StdErr","Copy file failed with error No such file or directory (path1 = \"dontexist\", path2 = \"alsodontexist\")\nCopy file failed with exception filesystem error: No such file or directory: No such file or directory [dontexist] [alsodontexist] (path1 = \"dontexist\", path2 = \"alsodontexist\")\n",{"_31":3415,"_3409":3416},"ExitCode","0",{"_31":3408,"_3409":3418},"Finish","hpplib",[3421,3436,3445,3454,3463,3472,3481,3490,3500,3509,3520,3531,3542,3553,3562,3573],{"_11":3422,"_3423":3424,"_3399":3425,"_3426":3427,"_3428":3429,"_3434":3435},"CLI11","repository","CLIUtils/CLI11","CLI11 is a command line parser for C++11 and beyond that provides a rich feature set with a simple and intuitive interface.","headerDescription","","wandbox",{"_3430":3431,"_3432":3433},"tagName","v2.5.0","publishedAt","2025-02-27T12:29:12Z","clangd",{"_3430":3431,"_3432":3433},{"_11":3437,"_3423":3438,"_3399":3439,"_3426":3440,"_3428":3441,"_3434":3444},"cxxopts","jarro2783/cxxopts","Lightweight C++ command line option parser","",{"_3430":3442,"_3432":3443},"v3.2.0","2024-02-15T05:32:43Z",{"_3430":3442,"_3432":3443},{"_11":3446,"_3423":3447,"_3399":3448,"_3426":3449,"_3428":3450,"_3434":3453},"nanobench","martinus/nanobench","Simple, fast, accurate single-header microbenchmarking functionality for C++11/14/17/20","",{"_3430":3451,"_3432":3452},"v4.3.11","2023-02-16T19:06:26Z",{"_3430":3451,"_3432":3452},{"_11":3455,"_3423":3456,"_3399":3457,"_3426":3458,"_3428":3459,"_3434":3462},"toml11","ToruNiina/toml11","TOML for Modern C++","",{"_3430":3460,"_3432":3461},"v4.4.0","2025-02-15T16:20:52Z",{"_3430":3460,"_3432":3461},{"_11":3464,"_3423":3465,"_3399":3466,"_3426":3467,"_3428":3468,"_3434":3471},"toml++","marzer/tomlplusplus","Header-only TOML config file parser and serializer for C++17.","",{"_3430":3469,"_3432":3470},"v3.4.0","2023-10-13T13:45:17Z",{"_3430":3469,"_3432":3470},{"_11":3473,"_3423":3474,"_3399":3475,"_3426":3476,"_3428":3477,"_3434":3480},"rapidjson","Tencent/rapidjson","A fast JSON parser/generator for C++ with both SAX/DOM style API","",{"_3430":3478,"_3432":3479},"v1.1.0","2016-08-25T08:01:22Z",{"_3430":3478,"_3432":3479},{"_11":3482,"_3423":3483,"_3399":3484,"_3426":3485,"_3428":3486,"_3434":3489},"picojson","kazuho/picojson","a header-file-only, JSON parser serializer in C++","",{"_3430":3487,"_3432":3488},"v1.3.0","2015-02-25T04:12:53Z",{"_3430":3487,"_3432":3488},{"_11":3491,"_3423":3491,"_3399":3492,"_3426":3493,"_3428":3494,"_3434":3497},"nlohmann/json","JSON for Modern C++","",{"_3430":3495,"_3432":3496},"v3.12.0","2025-04-11T08:43:39Z",{"_3430":3498,"_3432":3499},"v3.11.3","2023-11-28T21:38:09Z",{"_11":3501,"_3423":3502,"_3399":3503,"_3426":3504,"_3428":3505,"_3434":3508},"csv-parser","vincentlaucsb/csv-parser","A high-performance, fully-featured CSV parser and serializer for modern C++.","",{"_3430":3506,"_3432":3507},"2.3.0","2024-06-15T20:23:18Z",{"_3430":3506,"_3432":3507},{"_11":3510,"_3423":3511,"_3399":3512,"_3426":3513,"_3428":3514,"_3434":3517},"rapidcsv","d99kris/rapidcsv","C++ CSV parser library","",{"_3430":3515,"_3432":3516},"v8.85","2025-03-22T01:58:55Z",{"_3430":3518,"_3432":3519},"v8.84","2024-09-28T05:31:16Z",{"_11":3521,"_3423":3522,"_3399":3523,"_3426":3524,"_3428":3525,"_3434":3528},"fmt","fmtlib/fmt","A modern formatting 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