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value/set.hh
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25 
26 #ifndef MLN_VALUE_SET_HH
27 # define MLN_VALUE_SET_HH
28 
32 
33 # include <mln/value/internal/iterable_set.hh>
34 # include <mln/trait/value_.hh>
35 
36 
37 namespace mln
38 {
39 
40  namespace value
41  {
42 
43  namespace internal
44  {
45 
46  template <typename T, typename E, bool is_lowq = false>
47  struct set_selector_ // no inheritance
48  {};
49 
50  template <typename T, typename E>
51  struct set_selector_< T, E, true > // lowq so iterable
52  :
53  public iterable_set< T, E >
54  {};
55 
56  } // end of namespace mln::value::internal
57 
58 
59 
64  template <typename T>
65  struct set : public internal::set_selector_< T, set<T>,
66  mlc_equal( mln_trait_value_quant(T),
67  mln::trait::value::quant::low )::value
68  >
69  {
71  static const set<T>& the();
72  };
73 
74 
75 # ifndef MLN_INCLUDE_ONLY
76 
77  template <typename T>
78  inline
79  const set<T>&
80  set<T>::the()
81  {
82  static set<T> the_;
83  return the_;
84  }
85 
86 # endif // ! MLN_INCLUDE_ONLY
87 
88  } // end of namespace mln::value
89 
90 } // end of namespace mln
91 
92 
93 #endif // ! MLN_VALUE_SET_HH