outcome/detail/basic_outcome_exception_observers.hpp

0001 /* Exception observers for outcome type
0002 (C) 2017-2024 Niall Douglas <http://www.nedproductions.biz/> (3 commits)
0003 File Created: Oct 2017
0004
0005
0006 Boost Software License - Version 1.0 - August 17th, 2003
0007
0008 Permission is hereby granted, free of charge, to any person or organization
0009 obtaining a copy of the software and accompanying documentation covered by
0010 this license (the "Software") to use, reproduce, display, distribute,
0011 execute, and transmit the Software, and to prepare derivative works of the
0012 Software, and to permit third-parties to whom the Software is furnished to
0013 do so, all subject to the following:
0014
0015 The copyright notices in the Software and this entire statement, including
0016 the above license grant, this restriction and the following disclaimer,
0017 must be included in all copies of the Software, in whole or in part, and
0018 all derivative works of the Software, unless such copies or derivative
0019 works are solely in the form of machine-executable object code generated by
0020 a source language processor.
0021
0022 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0023 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0024 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
0025 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
0026 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
0027 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0028 DEALINGS IN THE SOFTWARE.
0029 */
0030
0031 #ifndef BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_HPP
0032 #define BOOST_OUTCOME_BASIC_OUTCOME_EXCEPTION_OBSERVERS_HPP
0033
0034 #include "basic_result_storage.hpp"
0035
0036 BOOST_OUTCOME_V2_NAMESPACE_EXPORT_BEGIN
0037
0038 namespace detail
0039 {
0040   template <class Base, class R, class S, class P, class NoValuePolicy> class basic_outcome_exception_observers : public Base
0041   {
0042   public:
0043     using exception_type = P;
0044     using Base::Base;
0045
0046     constexpr inline exception_type &assume_exception() & noexcept;
0047     constexpr inline const exception_type &assume_exception() const & noexcept;
0048     constexpr inline exception_type &&assume_exception() && noexcept;
0049     constexpr inline const exception_type &&assume_exception() const && noexcept;
0050
0051     constexpr inline exception_type &exception() &;
0052     constexpr inline const exception_type &exception() const &;
0053     constexpr inline exception_type &&exception() &&;
0054     constexpr inline const exception_type &&exception() const &&;
0055   };
0056
0057   // Exception observers not present
0058   template <class Base, class R, class S, class NoValuePolicy> class basic_outcome_exception_observers<Base, R, S, void, NoValuePolicy> : public Base
0059   {
0060   public:
0061     using Base::Base;
0062
0063     constexpr void assume_exception() & noexcept { NoValuePolicy::narrow_exception_check(*this); }
0064     constexpr void assume_exception() const & noexcept { NoValuePolicy::narrow_exception_check(*this); }
0065     constexpr void assume_exception() && noexcept { NoValuePolicy::narrow_exception_check(std::move(*this)); }
0066     constexpr void assume_exception() const && noexcept { NoValuePolicy::narrow_exception_check(std::move(*this)); }
0067
0068     constexpr void exception() & { NoValuePolicy::wide_exception_check(*this); }
0069     constexpr void exception() const & { NoValuePolicy::wide_exception_check(*this); }
0070     constexpr void exception() && { NoValuePolicy::wide_exception_check(std::move(*this)); }
0071     constexpr void exception() const && { NoValuePolicy::wide_exception_check(std::move(*this)); }
0072   };
0073
0074 }  // namespace detail
0075
0076 BOOST_OUTCOME_V2_NAMESPACE_END
0077
0078 #endif