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fix_return.hh
1 // Copyright (C) 2008, 2009 EPITA Research and Development Laboratory (LRDE)
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25 
26 #ifndef MLN_METAL_FIX_RETURN_HH
27 # define MLN_METAL_FIX_RETURN_HH
28 
36 # define mlc_fix_return(T) typename mln::metal::fix_return< T >::ret
37 
38 
39 namespace mln
40 {
41 
42  namespace metal
43  {
44 
45  // No-op.
46  template <typename T> struct fix_return { typedef T ret; };
47  template <typename T> struct fix_return< T& > { typedef T& ret; };
48  template <typename T> struct fix_return< const T& > { typedef const T& ret; };
49  template <typename T> struct fix_return< T* > { typedef T* ret; };
50  template <typename T> struct fix_return< const T* > { typedef const T* ret; };
51 
52  // Remove const.
53  template <typename T> struct fix_return< const T > { typedef T ret; };
54  template <typename T> struct fix_return< T* const > { typedef T* ret; };
55  template <typename T> struct fix_return< const T* const > { typedef const T* ret; };
56 
57  } // end of namespace mln::metal
58 
59 } // end of namespace mln
60 
61 
62 #endif // ! MLN_METAL_FIX_RETURN_HH