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data/compute.hh
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26 
27 #ifndef MLN_DATA_COMPUTE_HH
28 # define MLN_DATA_COMPUTE_HH
29 
33 
34 # include <mln/data/update.hh>
35 # include <mln/core/concept/meta_accumulator.hh>
36 
37 
38 
39 namespace mln
40 {
41 
42  namespace data
43  {
44 
57  template <typename A, typename I>
58  mln_result(A)
59  compute(const Accumulator<A>& a, const Image<I>& input);
60 
61 
73  template <typename A, typename I>
74  mln_result(A)
75  compute(Accumulator<A>& a, const Image<I>& input);
76 
77 
87  template <typename A, typename I>
88  mln_meta_accu_result(A, mln_value(I))
89  compute(const Meta_Accumulator<A>& a, const Image<I>& input);
90 
91 
92 
93 # ifndef MLN_INCLUDE_ONLY
94 
95 
96  // Facades.
97 
98  template <typename A, typename I>
99  inline
100  mln_result(A)
101  compute(const Accumulator<A>& a_, const Image<I>& input)
102  {
103  (void) a_;
104  A a;
105  return compute(a, input);
106  }
107 
108 
109  template <typename A, typename I>
110  inline
111  mln_result(A)
112  compute(Accumulator<A>& a_, const Image<I>& input)
113  {
114  mln_trace("data::compute");
115 
116  A a = exact(a_);
117  data::internal::update_tests(a, input);
118 
119  a.init();
120  data::internal::update_dispatch(a, input);
121 
122  return a;
123  }
124 
125 
126  template <typename A, typename I>
127  inline
128  mln_meta_accu_result(A, mln_value(I))
129  compute(const Meta_Accumulator<A>& a, const Image<I>& input)
130  {
131  typedef mln_accu_with(A, mln_value(I)) A_;
132  A_ a_ = accu::unmeta(exact(a), mln_value(I)());
133 
134  return data::compute(a_, input); // Call the previous version.
135  }
136 
137 # endif // ! MLN_INCLUDE_ONLY
138 
139  } // end of namespace mln::data
140 
141 } // end of namespace mln
142 
143 
144 #endif // ! MLN_DATA_COMPUTE_HH