factory_trait.hh
Go to the documentation of this file.
1 /* -*- mia-c++ -*-
2  *
3  * This file is part of MIA - a toolbox for medical image analysis
4  * Copyright (c) Leipzig, Madrid 1999-2013 Gert Wollny
5  *
6  * MIA is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with MIA; if not, see <http://www.gnu.org/licenses/>.
18  *
19  */
20 
21 #ifndef mia_core_factory_trait_hh
22 #define mia_core_factory_trait_hh
23 
24 #include <mia/core/defines.hh>
25 
40 template <class T>
41 class FactoryTrait {
43  typedef typename T::must_create_trait_using_FACTORY_TRAIT type;
44 };
45 
54 template <class T>
55 class FactoryTrait<std::shared_ptr<T> > {
56 public:
58  typedef typename FactoryTrait<T>::type type;
59 };
60 
66 #define FACTORY_TRAIT(F) \
67  template <> \
68  class FactoryTrait< F::Instance::ProductPtr::element_type > { \
69  public: \
70  typedef F type; \
71  };
72 
73 
75 
76 #endif