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700c42b85d
And use them to remove uses of chainActive and mapBlockIndex in wallet code This commit does not change behavior. Co-authored-by: Ben Woosley <ben.woosley@gmail.com>
18 lines
479 B
C++
18 lines
479 B
C++
// Copyright (c) 2017 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 <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::nullopt
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static auto& nullopt = boost::none;
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#endif // BITCOIN_OPTIONAL_H
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