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positive.hh
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26 
27 #ifndef MLN_TEST_POSITIVE_HH
28 # define MLN_TEST_POSITIVE_HH
29 
34 
35 # include <mln/test/predicate.hh>
36 # include <mln/pw/all.hh>
37 # include <mln/fun/v2v/id.hh>
38 # include <mln/literal/zero.hh>
39 
40 
41 namespace mln
42 {
43 
44  namespace test
45  {
46 
54  template <typename I>
55  bool positive(const Image<I>& input);
56 
57 
58 # ifndef MLN_INCLUDE_ONLY
59 
60  template <typename I>
61  inline
62  bool positive(const Image<I>& input_)
63  {
64  mln_trace("test::positive");
65 
66  const I& input = exact(input_);
67  mln_precondition(input.is_valid());
68  /* FIXME: Below the '>=' op should properly work with
69  signed/unsigned without warnings; so we really need to
70  overload ops for functions when literals are involved. */
71  mln_value(I) zero_ = literal::zero;
72  bool res = test::predicate(input.domain(),
73  pw::value(input) >= pw::cst(zero_));
74  /* FIXME: test the version below. */
75 // return test::predicate(input,
76 // fun::v2v::id<mln_value(I)>() >= pw::cst(0));
77 
78  return res;
79  }
80 
81 # endif // ! MLN_INCLUDE_ONLY
82 
83  } // end of namespace mln::test
84 
85 } // end of namespace mln
86 
87 
88 #endif // ! MLN_TEST_POSITIVE_HH