| 1 | /* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
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| 2 | |
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| 3 | /* |
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| 4 | Copyright (C) 2023 Jonathan Sweemer |
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| 5 | |
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| 6 | This file is part of QuantLib, a free-software/open-source library |
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| 7 | for financial quantitative analysts and developers - http://quantlib.org/ |
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| 8 | |
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| 9 | QuantLib is free software: you can redistribute it and/or modify it |
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| 10 | under the terms of the QuantLib license. You should have received a |
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| 11 | copy of the license along with this program; if not, please email |
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| 12 | <[email protected]>. The license is also available online at |
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| 13 | <http://quantlib.org/license.shtml>. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the license for more details. |
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| 18 | */ |
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| 19 | |
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| 20 | /*! \file optional.hpp |
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| 21 | \brief Maps optional to either the boost or std implementation |
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| 22 | */ |
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| 23 | |
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| 24 | #ifndef quantlib_optional_hpp |
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| 25 | #define quantlib_optional_hpp |
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| 26 | |
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| 27 | #include <ql/qldefines.hpp> |
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| 28 | |
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| 29 | #if defined(QL_USE_STD_OPTIONAL) |
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| 30 | #include <optional> |
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| 31 | #else |
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| 32 | #include <boost/optional.hpp> |
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| 33 | #endif |
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| 34 | |
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| 35 | namespace QuantLib { |
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| 36 | |
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| 37 | namespace ext { |
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| 38 | |
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| 39 | #if defined(QL_USE_STD_OPTIONAL) |
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| 40 | using std::optional; // NOLINT(misc-unused-using-decls) |
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| 41 | // here we can assume C++17 |
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| 42 | inline constexpr const std::nullopt_t& nullopt = std::nullopt; |
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| 43 | #else |
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| 44 | using boost::optional; // NOLINT(misc-unused-using-decls) |
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| 45 | // here we can't |
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| 46 | extern const boost::none_t& nullopt; |
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| 47 | #endif |
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| 48 | |
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| 49 | } |
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| 50 | |
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| 51 | } |
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| 52 | |
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| 53 | #endif |
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| 54 | |
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