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promote.hh
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25 
26 #ifndef MLN_TRAIT_PROMOTE_HH
27 # define MLN_TRAIT_PROMOTE_HH
28 
37 # include <mln/trait/solve.hh>
38 
39 
40 # define mln_trait_promote(T, U) typename mln::trait::promote< T , U >::ret
41 # define mln_trait_promote_(T, U) mln::trait::promote< T , U >::ret
42 
43 
44 
45 namespace mln
46 {
47 
48  // Fwd decl.
49  template <typename E> struct Object;
50 
51 
52  namespace trait
53  {
54 
56  template <typename T, typename U>
57  struct promote : public solve_binary<promote, T, U>
58  {
59  };
60 
61 
67  template <typename T>
68  struct set_binary_< promote, Object, T, Object, T >
69  {
70  typedef T ret;
71  };
72 
73 
74  } // end of namespace mln::trait
75 
76 } // end of namespace mln
77 
78 
79 #endif // ! MLN_TRAIT_PROMOTE_HH