blob: 95a3b24d0a0273c9b5fec23771eaaabe3f2d0a9e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
// 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 <utility>
#include <boost/optional.hpp>
//! Substitute for C++17 std::optional
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));
}
//! Substitute for C++17 std::nullopt
static auto& nullopt = boost::none;
#endif // BITCOIN_OPTIONAL_H
|
