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math/abs.hh
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26 
27 #ifndef MLN_MATH_ABS_HH
28 # define MLN_MATH_ABS_HH
29 
33 
34 # include <cmath>
35 # include <cstdlib>
36 
37 # include <mln/value/int_u.hh>
38 
39 
40 namespace mln
41 {
42 
43  namespace math
44  {
45 
49  template <typename T>
50  T abs(const T& v);
51 
60 
61  int abs(int v);
62  long abs(long v);
63 
64  float abs(float v);
65  double abs(double v);
66  long double abs(long double v);
68 
72  template <unsigned n>
74 
75 
76 
77 # ifndef MLN_INCLUDE_ONLY
78 
79  template <typename T>
80  inline
81  T abs(const T& v)
82  {
83  return v >= 0 ? v : static_cast<T>(-v);
84  }
85 
86  inline int abs(int v) { return std::abs(v); }
87  inline long abs(long v) { return std::abs(v); }
88 
89  inline float abs(float v) { return std::abs(v); }
90  inline double abs(double v) { return std::abs(v); }
91  inline long double abs(long double v) { return std::abs(v); }
92 
93  template <unsigned n>
94  inline
96  {
97  return v;
98  }
99 
100 # endif // ! MLN_INCLUDE_ONLY
101 
102  } // end of namespace mln::math
103 
104 } // end of namespace mln
105 
106 
107 #endif // ! MLN_MATH_ABS_HH