Tweeny  3.2.0
A Tweening library for modern C++
dispatcher.h
1 /*
2  This file is part of the Tweeny library.
3 
4  Copyright (c) 2016-2021 Leonardo Guilherme Lucena de Freitas
5  Copyright (c) 2016 Guilherme R. Costa
6 
7  Permission is hereby granted, free of charge, to any person obtaining a copy of
8  this software and associated documentation files (the "Software"), to deal in
9  the Software without restriction, including without limitation the rights to
10  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11  the Software, and to permit persons to whom the Software is furnished to do so,
12  subject to the following conditions:
13 
14  The above copyright notice and this permission notice shall be included in all
15  copies or substantial portions of the Software.
16 
17  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24 
25 /* This file contains code to help call a function applying a tuple as its arguments.
26  * This code is private and not documented. */
27 
28 #ifndef TWEENY_DISPATCHER_H
29 #define TWEENY_DISPATCHER_H
30 
31 #include <tuple>
32 
33 namespace tweeny {
34  namespace detail {
35  template<int ...> struct seq { };
36  template<int N, int ...S> struct gens : gens<N - 1, N - 1, S...> { };
37  template<int ...S> struct gens<0, S...> {
38  typedef seq<S...> type;
39  };
40 
41  template<typename R, typename Func, typename TupleType, int ...S>
42  R dispatch(Func && f, TupleType && args, seq<S...>) {
43  return f(std::get<S>(args) ...);
44  }
45 
46  template<typename R, typename Func, typename... Ts>
47  R call(Func && f, const std::tuple<Ts...> & args) {
48  return dispatch<R>(f, args, typename gens<sizeof...(Ts)>::type());
49  }
50  }
51 }
52 
53 #endif //TWEENY_DISPATCHER_H
The tweeny namespace contains all symbols and names for the Tweeny library.
Definition: MANUAL.dox:1