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component.hh
1 // Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
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7 // Software Foundation, version 2 of the License.
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17 // As a special exception, you may use this file as part of a free
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #ifndef MLN_FUN_V2V_COMPONENT_HH
27 # define MLN_FUN_V2V_COMPONENT_HH
28 
32 
33 # include <mln/core/concept/function.hh>
34 # include <mln/trait/value_.hh>
35 # include <mln/trait/value/comp.hh>
36 # include <mln/value/builtin/all.hh>
37 
38 
39 namespace mln
40 {
41 
42  namespace fun
43  {
44 
45  namespace v2v
46  {
47 
49  //
50  template <typename T, unsigned i>
51  struct component : public Function_v2v< component<T,i> >,
52  private metal::bool_<(i <= trait::value_<T>::dim)>::check_t
53  {
54  typedef mln_trait_value_comp(T, i) result;
55  result operator()(const T& v) const;
56  };
57 
58 
59 # ifndef MLN_INCLUDE_ONLY
60 
61  template <typename T, unsigned i>
62  inline
63  typename component<T,i>::result
64  component<T,i>::operator()(const T& v) const
65  {
66  return trait::value::internal::comp<T,i>::on(v);
67  }
68 
69 # endif // ! MLN_INCLUDE_ONLY
70 
71  } // end of namespace mln::fun::v2v
72 
73  } // end of namespace mln::fun
74 
75 } // end of namespace mln
76 
77 
78 #endif // ! MLN_FUN_V2V_COMPONENT_HH