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black.hh
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26 
27 #ifndef MLN_LITERAL_BLACK_HH
28 # define MLN_LITERAL_BLACK_HH
29 
32 
33 # include <mln/core/concept/literal.hh>
34 
35 
36 namespace mln
37 {
38 
39  namespace literal
40  {
41 
43  struct black_t : public Literal<black_t>
44  {
45  // This default constructor is needed for compilation with gcc
46  // 4.6.0, gcc 4.6.1 and Clang.
47  black_t();
48 
49 # ifdef MLN_NEW_VALUE_TYPES
50  operator float() const;
51  operator double() const;
52 # endif // MLN_NEW_VALUE_TYPES
53  };
54 
55 
57  extern const black_t black;
58 
59 
60 # ifndef MLN_INCLUDE_ONLY
61 
62 # ifndef MLN_WO_GLOBAL_VARS
63 
64  const black_t black;
65 
66 # endif
67 
68  inline
70  {
71  }
72 
73 # ifdef MLN_NEW_VALUE_TYPES
74  inline
75  black_t::operator float() const
76  {
77  return 0.f;
78  }
79 
80  inline
81  black_t::operator double() const
82  {
83  return 0.;
84  }
85 # endif // MLN_NEW_VALUE_TYPES
86 
87 # endif // ! MLN_INCLUDE_ONLY
88 
89  } // end of namespace mln::literal
90 
91 } // end of namespace mln
92 
93 
94 #endif // ! MLN_LITERAL_BLACK_HH