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find_root.hh
1 // Copyright (C) 2009, 2010 EPITA Research and Development Laboratory
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26 
27 #ifndef SCRIBO_PRIMITIVE_INTERNAL_FIND_ROOT_HH
28 # define SCRIBO_PRIMITIVE_INTERNAL_FIND_ROOT_HH
29 
33 
34 
35 # include <scribo/core/object_groups.hh>
36 
37 
38 namespace scribo
39 {
40 
41  namespace primitive
42  {
43 
44  namespace internal
45  {
46 
48  template <typename L>
49  unsigned
50  find_root(object_groups<L>& parent, unsigned x);
51 
52 # ifndef MLN_INCLUDE_ONLY
53 
54  template <typename L>
55  inline
56  unsigned
57  find_root(object_groups<L>& parent, unsigned x)
58  {
59  if (parent(x) == x)
60  return x;
61  else
62  return parent(x) = find_root(parent, parent(x));
63  }
64 
65 # endif // ! MLN_INCLUDE_ONLY
66 
67  } // end of namespace scribo::primitive::internal
68 
69  } // end of namespace scribo::text
70 
71 } // end of namespace scribo
72 
73 
74 #endif // ! SCRIBO_PRIMITIVE_INTERNAL_FIND_ROOT_HH