persistent-cache-cpp: /build/persistent-cache-cpp-git/src/persistent-cache-cpp/include/core/optional.h Source File

persistent-cache-cpp

optional.h
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1 /*
2 * Copyright (C) 2015 Canonical Ltd.
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 3 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *
16 * Authored by: Michi Henning <michi.henning@canonical.com>
17 */
18
19 #pragma once
20
21 #include <boost/optional.hpp>
22
23 namespace core
24 {
25
32 template <typename T>
33 using Optional = boost::optional<T>;
34
35 } // namespace core
core::Optional
boost::optional< T > Optional
Convenience typedef for nullable values.
Definition: optional.h:33
core
Top-level namespace for core functionality.
Definition: cache_codec.h:24