Mir
lambda_as_function.h
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1 /*
2  * Copyright © 2018 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License version 2 or 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 General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Alan Griffiths <alan@octopull.co.uk>
17  */
18 
19 #ifndef MIRAL_LAMBDA_AS_FUNCTION_H
20 #define MIRAL_LAMBDA_AS_FUNCTION_H
21 
22 #include <functional>
23 
24 namespace miral
25 {
26 namespace detail
27 {
28 template <class F> struct FunctionType;
29 
30 template<typename Lambda, typename Return, typename... Arg>
31 struct FunctionType<Return (Lambda::*)(Arg...)> { using type = std::function<Return(Arg...)>; };
32 
33 template<typename Lambda, typename Return, typename... Arg>
34 struct FunctionType<Return (Lambda::*)(Arg...) const> { using type = std::function<Return(Arg...)>; };
35 }
36 
37 template<typename Lambda>
38 auto lambda_as_function(Lambda&& lambda) -> typename detail::FunctionType<decltype(&Lambda::operator())>::type
39 {
40  return typename detail::FunctionType<decltype(&Lambda::operator())>::type(std::forward<Lambda>(lambda));
41 }
42 }
43 
44 #endif //MIRAL_LAMBDA_AS_FUNCTION_H
std::function< Return(Arg...)> type
Definition: lambda_as_function.h:34
Definition: lambda_as_function.h:28
std::function< Return(Arg...)> type
Definition: lambda_as_function.h:31
auto lambda_as_function(Lambda &&lambda) -> typename detail::FunctionType< decltype(&Lambda::operator())>::type
Definition: lambda_as_function.h:38
Mir Abstraction Layer.
Definition: floating_window_manager.h:29

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