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
Top-level namespace for core functionality.
Definition: persistent_cache.h:24
boost::optional< T > Optional
Convenience typedef for nullable values.
Definition: optional.h:33