feat():initial version

install/boost_1_75_0/include/boost/outcome/result.hpp

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+/* A very simple result type
+(C) 2017-2020 Niall Douglas <http://www.nedproductions.biz/> (2 commits)
+File Created: June 2017
+
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef BOOST_OUTCOME_RESULT_HPP
+#define BOOST_OUTCOME_RESULT_HPP
+
+#include "boost_result.hpp"
+
+BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
+
+/*! In standalone Outcome, this aliases `std_result<>`. In Boost.Outcome, this aliases `boost_result<>`.
+*/
+template <class R, class S = boost::system::error_code, class NoValuePolicy = policy::default_policy<R, S, void>>  //
+using result = boost_result<R, S, NoValuePolicy>;
+
+/*! In standalone Outcome, this aliases `std_unchecked<>`. In Boost.Outcome, this aliases `boost_checked<>`.
+*/
+template <class R, class S = boost::system::error_code> using unchecked = result<R, S, policy::all_narrow>;
+
+/*! In standalone Outcome, this aliases `std_checked<>`. In Boost.Outcome, this aliases `boost_checked<>`.
+*/
+template <class R, class S = boost::system::error_code> using checked = result<R, S, policy::throw_bad_result_access<S, void>>;
+
+BOOST_OUTCOME_V2_NAMESPACE_END
+
+#endif