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fun/v2v/ch_function_value.hh
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25 
26 #ifndef MLN_FUN_V2V_CH_FUNCTION_VALUE_HH
27 # define MLN_FUN_V2V_CH_FUNCTION_VALUE_HH
28 
32 
33 # include <mln/core/concept/function.hh>
34 # include <mln/fun/internal/ch_function_value_impl.hh>
35 
36 
37 
38 namespace mln
39 {
40 
41  // Forward declaration.
42  namespace convert { template <typename T, typename O> T to(const O& from); }
43 
44  namespace fun
45  {
46 
47  namespace v2v
48  {
49 
51  template <typename F, typename V>
52  class ch_function_value : public Function_v2v< ch_function_value<F,V> >,
53  public internal::ch_function_value_impl<F, V>
54  {
55  public:
56  typedef F function;
57  typedef V result;
58  typedef V rvalue;
59  typedef V lvalue;
60 
62  ch_function_value(const F& f);
63 
64  template <typename W>
65  V operator()(const W& w) const;
66 
67  private:
68  F f_;
69  };
70 
71 
72 # ifndef MLN_INCLUDE_ONLY
73 
74  template <typename F, typename V>
75  inline
77  {
78  }
79 
80  template <typename F, typename V>
81  inline
82  ch_function_value<F,V>::ch_function_value(const F& f)
83  {
84  f_ = f;
85  }
86 
87  template <typename F, typename V>
88  template <typename W>
89  inline
90  V
91  ch_function_value<F,V>::operator()(const W& w) const
92  {
93  return mln::convert::to<V>(f_(w));
94  }
95 
96 # endif // ! MLN_INCLUDE_ONLY
97 
98  } // end of namespace mln::fun::v2v
99 
100  } // end of namespace mln::fun
101 
102 } // end of namespace mln
103 
104 
105 #endif // ! MLN_FUN_V2V_CH_FUNCTION_VALUE_HH