optional.h

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// Copyright (c) 2017 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_OPTIONAL_H
#define BITCOIN_OPTIONAL_H
 
#include <boost/optional.hpp>
 
template <typename T>
using Optional = boost::optional<T>;
 
static auto& nullopt = boost::none;
 
#endif // BITCOIN_OPTIONAL_H