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comp_count.hh
1 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
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25 
26 #ifndef MLN_FUN_COMPONENT_COMP_COUNT_HH
27 # define MLN_FUN_COMPONENT_COMP_COUNT_HH
28 
32 
33 # include <mln/fun/unary.hh>
34 # include <mln/value/rgb.hh>
35 # include <mln/value/int_u.hh>
36 # include <mln/algebra/vec.hh>
37 
38 namespace mln
39 {
40 
41  namespace fun
42  {
43 
44  struct comp_count : unary<comp_count>
45  {
46  };
47 
48  } // end of namespace mln::fun
49 
50 # ifndef MLN_INCLUDE_ONLY
51 
52  namespace trait
53  {
54 
55  namespace next
56  {
57 
58  template <unsigned n>
59  struct set_precise_unary_<mln::fun::comp_count, mln::value::rgb<n> >
60  {
61  typedef set_precise_unary_ ret;
62 
63  typedef mln::value::rgb<n> argument;
64  typedef unsigned result;
65  typedef argument& lvalue;
66 
67  static result read(const argument&)
68  {
69  return 3;
70  }
71  };
72 
73  template <unsigned n, typename T>
74  struct set_precise_unary_<mln::fun::comp_count, mln::algebra::vec<n,T> >
75  {
76  typedef set_precise_unary_ ret;
77 
78  typedef mln::algebra::vec<n,T> argument;
79  typedef unsigned result;
80  typedef argument& lvalue;
81 
82  static result read(const argument&)
83  {
84  return n;
85  }
86  };
87 
88  } // end of namespace mln::trait::next
89 
90  } // end of namespace mln::trait
91 
92 # endif // ! MLN_INCLUDE_ONLY
93 
94 } // end of namespace mln
95 
96 #endif // ! MLN_FUN_COMPONENT_COMP_COUNT_HH