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-rw-r--r--src/optional.h18
1 files changed, 6 insertions, 12 deletions
diff --git a/src/optional.h b/src/optional.h
index a382cd7b77..583c56eabd 100644
--- a/src/optional.h
+++ b/src/optional.h
@@ -1,26 +1,20 @@
-// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Copyright (c) 2017-2020 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 <optional>
#include <utility>
-#include <boost/optional.hpp>
-
//! Substitute for C++17 std::optional
+//! DEPRECATED use std::optional in new code.
template <typename T>
-using Optional = boost::optional<T>;
-
-//! Substitute for C++17 std::make_optional
-template <typename T>
-Optional<T> MakeOptional(bool condition, T&& value)
-{
- return boost::make_optional(condition, std::forward<T>(value));
-}
+using Optional = std::optional<T>;
//! Substitute for C++17 std::nullopt
-static auto& nullopt = boost::none;
+//! DEPRECATED use std::nullopt in new code.
+static auto& nullopt = std::nullopt;
#endif // BITCOIN_OPTIONAL_H