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index.hh
1 // Copyright (C) 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
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7 // Software Foundation, version 2 of the License.
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #ifndef MLN_UTIL_INDEX_HH
27 # define MLN_UTIL_INDEX_HH
28 
38 # include <mln/core/concept/object.hh>
39 
40 
41 namespace mln
42 {
43 
44  namespace util
45  {
46 
47  // Forward declaration.
48  template <typename Tag> struct dindex_;
49 
50 
54  template <typename Tag = void>
55  struct index_ // : public Object< index_<Tag> >
56  {
58 
60 
61  typedef int coord;
62  enum { dim = 1 };
63 
64  int i_;
65 
66  index_() {}
67  index_(int i) : i_(i) {}
68 
70  {
71  ++i_; // Pre-inc.
72  return *this;
73  }
74 
76  {
77  index_<Tag> cpy(i_ + 1);
78  ++i_; // Post-inc.
79  return cpy;
80  }
81 
83  {
84  --i_; // Pre-dec.
85  return *this;
86  }
87 
89  {
90  index_<Tag> cpy(i_ + 1);
91  --i_; // Post-dec.
92  return cpy;
93  }
94 
95  bool operator<(const index_& rhs) const
96  {
97  return i_ < rhs.i_;
98  }
99 
100  bool operator<(int i) const
101  {
102  return i_ < i;
103  }
104 
105  operator int() const { return i_; }
106  };
107 
109 
110 
111 
112 # ifndef MLN_INCLUDE_ONLY
113 
114  // FIXME
115 
116 # endif // ! MLN_INCLUDE_ONLY
117 
118  } // end of namespace mln::util
119 
120 } // end of namespace mln
121 
122 
123 # include <mln/util/dindex.hh>
124 
125 
126 #endif // ! MLN_UTIL_INDEX_HH