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lxor.hh
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25 
26 #ifndef MLN_FUN_VV2V_LXOR_HH
27 # define MLN_FUN_VV2V_LXOR_HH
28 
32 
33 # include <mln/core/concept/function.hh>
34 # include <mln/trait/op/xor.hh>
35 
36 
37 namespace mln
38 {
39 
40  namespace fun
41  {
42 
43  namespace vv2v
44  {
45 
47  template <typename L, typename R = L>
48  struct lxor : public Function_vv2v< lxor<L,R> >
49  {
50  typedef mln_trait_op_or(L, R) result;
51  result operator()(const L& v1, const R& v2) const;
52  };
53 
54 
55 # ifndef MLN_INCLUDE_ONLY
56 
57  template <typename L, typename R>
58  inline
59  typename lxor<L,R>::result
60  lxor<L,R>::operator()(const L& v1, const R& v2) const
61  {
62  // v1 xor v2 = (v1 and (not v2)) or ((not v1) and v2)
63  // = (not (v1 and v2)) and (v1 or v2)
64  return (! (v1 && v2)) && (v1 || v2);
65  }
66 
67 # endif // ! MLN_INCLUDE_ONLY
68 
69  } // end of namespace mln::fun::vv2v
70 
71  } // end of namespace mln::fun
72 
73 } // end of namespace mln
74 
75 
76 #endif // ! MLN_FUN_VV2V_LXOR_HH