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accu_result.hh
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26 
27 #ifndef MLN_FUN_ACCU_RESULT_HH
28 # define MLN_FUN_ACCU_RESULT_HH
29 
30 # include <mln/fun/unary.hh>
31 # include <mln/core/concept/accumulator.hh>
32 
33 namespace mln
34 {
35 
36  // accu_result: return result of given accumulator.
37  namespace fun
38  {
39 
40  struct accu_result : unary<accu_result>
41  {
42  };
43 
44  } // end of namespace mln::fun
45 
46  namespace trait
47  {
48 
49  namespace next
50  {
51  template <typename E>
52  struct set_unary_<fun::accu_result, Accumulator, E>
53  {
54  typedef set_unary_ ret;
55  typedef typename E::result result;
56  typedef mln::Accumulator<E> argument;
57 
58  static result read(const argument& x)
59  {
60  return exact(x).to_result();
61  }
62  };
63 
64  } // end of namespace mln::trait::next
65 
66  } // end of namespace mln::trait
67 
68 } // end of namespace mln
69 
70 #endif // ! MLN_FUN_ACCU_RESULT_HH