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value_set.hh
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26 
27 #ifndef MLN_CORE_CONCEPT_VALUE_SET_HH
28 # define MLN_CORE_CONCEPT_VALUE_SET_HH
29 
34 # include <mln/core/concept/value_iterator.hh> // FIXME: Why not object.hh?
35 
36 
37 namespace mln
38 {
39 
40  // Fwd decl.
41  template <typename E> struct Value_Set;
42 
45  template <>
46  struct Value_Set<void>
47  {
49  };
51 
52 
58  template <typename E>
59  struct Value_Set : public Object<E>
60  {
62 
63  /*
64  typedef value;
65  typedef fwd_viter;
66  typedef bkd_viter;
67 
68  bool has(const value& v) const;
69 
70  value operator[](unsigned i) const;
71  unsigned index_of(const value& v) const;
72 
73  unsigned nvalues() const;
74  */
75 
76  protected:
77  Value_Set();
78  };
79 
80 
82  template <typename E>
83  std::ostream& operator<<(std::ostream& ostr, const Value_Set<E>& vs);
84 
85 
86 # ifndef MLN_INCLUDE_ONLY
87 
88  template <typename E>
89  inline
91  {
92  typedef mln_value(E) value;
93  typedef mln_fwd_viter(E) fwd_viter;
94  typedef mln_bkd_viter(E) bkd_viter;
95 
96  bool (E::*m1)(const value&) const = & E::has;
97  (void) m1;
98  value (E::*m2)(unsigned) const = & E::operator[];
99  (void) m2;
100  unsigned (E::*m3)() const = & E::nvalues;
101  (void) m3;
102  }
103 
104  template <typename E>
105  inline
106  std::ostream& operator<<(std::ostream& ostr, const Value_Set<E>& vs_)
107  {
108  const E& vs = exact(vs_);
109  ostr << "{ ";
110  for (unsigned i = 0; i < vs.nvalues(); ++i)
111  ostr << vs[i] << ' ';
112  return ostr << '}';
113  }
114 
115 # endif // ! MLN_INCLUDE_ONLY
116 
117 } // end of namespace mln
118 
119 
120 #endif // ! MLN_CORE_CONCEPT_VALUE_SET_HH