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-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT-
27 lines
695 B
C++
27 lines
695 B
C++
// Copyright (c) 2017-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_OPTIONAL_H
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#define BITCOIN_OPTIONAL_H
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#include <utility>
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#include <boost/optional.hpp>
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//! Substitute for C++17 std::optional
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template <typename T>
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using Optional = boost::optional<T>;
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//! Substitute for C++17 std::make_optional
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template <typename T>
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Optional<T> MakeOptional(bool condition, T&& value)
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{
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return boost::make_optional(condition, std::forward<T>(value));
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}
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//! Substitute for C++17 std::nullopt
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static auto& nullopt = boost::none;
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#endif // BITCOIN_OPTIONAL_H
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