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fun/v2v/ch_function_value.hh
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26 
27 #ifndef MLN_FUN_V2V_CH_FUNCTION_VALUE_HH
28 # define MLN_FUN_V2V_CH_FUNCTION_VALUE_HH
29 
33 
34 # include <mln/core/concept/function.hh>
35 # include <mln/fun/internal/ch_function_value_impl.hh>
36 
37 
38 
39 namespace mln
40 {
41 
42  // Forward declaration.
43  namespace convert { template <typename T, typename O> T to(const O& from); }
44 
45  namespace fun
46  {
47 
48  namespace v2v
49  {
50 
52  template <typename F, typename V>
53  class ch_function_value : public Function_v2v< ch_function_value<F,V> >,
55  {
56  public:
57  typedef F function;
58  typedef V result;
59  typedef V rvalue;
60  typedef V lvalue;
61 
63  ch_function_value(const F& f);
64 
65  template <typename W>
66  V operator()(const W& w) const;
67 
68  private:
69  F f_;
70  };
71 
72 
73 # ifndef MLN_INCLUDE_ONLY
74 
75  template <typename F, typename V>
76  inline
78  {
79  }
80 
81  template <typename F, typename V>
82  inline
84  {
85  f_ = f;
86  }
87 
88  template <typename F, typename V>
89  template <typename W>
90  inline
91  V
92  ch_function_value<F,V>::operator()(const W& w) const
93  {
94  return mln::convert::to<V>(f_(w));
95  }
96 
97 # endif // ! MLN_INCLUDE_ONLY
98 
99  } // end of namespace mln::fun::v2v
100 
101  } // end of namespace mln::fun
102 
103 } // end of namespace mln
104 
105 
106 #endif // ! MLN_FUN_V2V_CH_FUNCTION_VALUE_HH