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value_iterator.hh
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25 
26 #ifndef MLN_CORE_CONCEPT_VALUE_ITERATOR_HH
27 # define MLN_CORE_CONCEPT_VALUE_ITERATOR_HH
28 
34 # include <mln/core/concept/iterator.hh>
35 
36 
37 namespace mln
38 {
39 
49  template <typename E>
50  struct Value_Iterator : public Iterator<E>
51  {
52  /*
53  typedef value;
54  operator value() const;
55  */
56 
57  protected:
58  Value_Iterator();
59  };
60 
61 
74  template <typename E>
75  std::ostream& operator<<(std::ostream& ostr, const Value_Iterator<E>& v);
76 
77 
78 
79 # ifndef MLN_INCLUDE_ONLY
80 
81  template <typename E>
82  inline
83  Value_Iterator<E>::Value_Iterator()
84  {
85  typedef mln_value(E) value;
86  value (E::*m)() const = & E::operator value;
87  m = 0;
88  }
89 
90  template <typename E>
91  inline
92  std::ostream& operator<<(std::ostream& ostr, const Value_Iterator<E>& v)
93  {
94  mln_precondition(exact(v).is_valid());
95  return ostr << mln_value(E)(exact(v));
96  }
97 
98 # endif // ! MLN_INCLUDE_ONLY
99 
100 } // end of namespace mln
101 
102 
103 #endif // ! MLN_CORE_CONCEPT_VALUE_ITERATOR_HH