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next.hh
1 // Copyright (C) 2010 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.
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12 // General Public License for more details.
13 //
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15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
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17 // As a special exception, you may use this file as part of a free
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #ifndef MLN_VALUE_NEXT_HH
27 # define MLN_VALUE_NEXT_HH
28 
32 
33 # include <mln/value/label.hh>
34 
35 
36 namespace mln
37 {
38 
39  namespace value
40  {
41 
42  template <typename V>
43  V
44  next(const V&);
45 
46 
47 # ifndef MLN_INCLUDE_ONLY
48 
49 
50  // Implementations
51 
52  namespace implementation
53  {
54 
55  namespace generic
56  {
57 
58  template <typename V>
59  inline
60  V
61  next(const V& v)
62  {
63  return v + 1;
64  }
65 
66  } // end of namespace mln::value::implementation::generic
67 
68 
69  template <unsigned n>
70  inline
72  next_label(const mln::value::label<n>& v)
73  {
74  return v.next();
75  }
76 
77  } // end of namespace mln::value::implementation
78 
79 
80 
81  // Dispatch
82 
83  namespace internal
84  {
85 
86  template <unsigned n>
87  inline
88  label<n>
89  next_dispatch(const label<n>& v)
90  {
91  return implementation::next_label(v);
92  }
93 
94 
95  template <typename V>
96  inline
97  V
98  next_dispatch(const V& v)
99  {
101  }
102 
103  } // end of namespace mln::value::internal
104 
105 
106 
107  // Facade
108 
109  template <typename V>
110  inline
111  V
112  next(const V& v)
113  {
114  return internal::next_dispatch(v);
115  }
116 
117 
118 # endif // ! MLN_INCLUDE_ONLY
119 
120 
121  } // end of namespace mln::value
122 
123 } // end of namespace mln
124 
125 #endif // ! MLN_VALUE_NEXT_HH