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const.hh
1 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
8 //
9 // Olena is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
16 //
17 // As a special exception, you may use this file as part of a free
18 // software project without restriction. Specifically, if other files
19 // instantiate templates or use macros or inline functions from this
20 // file, or you compile this file and link it with other files to produce
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24 // executable file might be covered by the GNU General Public License.
25 
26 #ifndef MLN_METAL_CONST_HH
27 # define MLN_METAL_CONST_HH
28 
36 # define mlc_const(T) typename mln::metal::const_< T >::ret
37 
38 # define mlc_const_return(T) typename mln::metal::const_return_< T >::ret
39 
40 
41 
42 namespace mln
43 {
44 
45  namespace metal
46  {
47 
48  // const_
49 
50  template <typename T> struct const_/* T */ { typedef const T ret; };
51  template <typename T> struct const_< const T > { typedef const T ret; };
52 
53  template <typename T> struct const_< T& > { typedef const T& ret; };
54  template <typename T> struct const_< const T& > { typedef const T& ret; };
55 
56  template <typename T> struct const_< T* > { typedef const T* const ret; };
57  template <typename T> struct const_< const T* > { typedef const T* const ret; };
58  template <typename T> struct const_< T* const > { typedef const T* const ret; };
59  template <typename T> struct const_< const T* const > { typedef const T* const ret; };
60 
61 
62  // const_return_
63 
64  template <typename T> struct const_return_/* T */ { typedef T ret; };
65  template <typename T> struct const_return_< const T > { typedef T ret; };
66 
67  template <typename T> struct const_return_< T& > { typedef const T& ret; };
68  template <typename T> struct const_return_< const T& > { typedef const T& ret; };
69 
70  template <typename T> struct const_return_< T* > { typedef const T* ret; };
71  template <typename T> struct const_return_< const T* > { typedef const T* ret; };
72  template <typename T> struct const_return_< T* const > { typedef const T* ret; };
73  template <typename T> struct const_return_< const T* const > { typedef const T* ret; };
74 
75  } // end of namespace mln::metal
76 
77 } // end of namespace mln
78 
79 
80 #endif // ! MLN_METAL_CONST_HH