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identity.hh
1 // Copyright (C) 2009, 2011 EPITA Research and Development Laboratory
2 // (LRDE)
3 //
4 // This file is part of Olena.
5 //
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8 // Software Foundation, version 2 of the License.
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26 
27 #ifndef MLN_LITERAL_IDENTITY_HH
28 # define MLN_LITERAL_IDENTITY_HH
29 
33 
34 # include <mln/core/concept/literal.hh>
35 
36 
37 namespace mln
38 {
39 
40  namespace literal
41  {
42 
44  struct identity_t : public Literal<identity_t>
45  {
46  // This default constructor is needed for compilation with gcc
47  // 4.6.0, gcc 4.6.1 and Clang.
48  identity_t();
49  };
50 
52  extern const identity_t identity;
53 
54 # ifndef MLN_INCLUDE_ONLY
55 
56  inline
58  {
59  }
60 
61 # ifndef MLN_WO_GLOBAL_VARS
62 
63  const identity_t identity;
64 
65 # endif // !MLN_WO_GLOBAL_VARS
66 
67 # endif
68 
69  } // end of namespace mln::literal
70 
71 } // end of namespace mln
72 
73 
74 #endif // ! MLN_LITERAL_IDENTITY_HH