flower/include/tuple.hh

   1 /*
   2   tuple.hh -- declare Tuple
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2006--2007 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10 #ifndef TUPLE_HH
  11 #define TUPLE_HH
  12
  13 template<class T, int N>
  14 struct Tuple
  15 {
  16   T t_array[N];
  17   Tuple ()
  18   {
  19   }
  20
  21   Tuple (T const *src)
  22   {
  23     for (int i = 0; i < N; i++)
  24       t_array[i] = src[i];
  25   }
  26 };
  27
  28 template<class K>
  29 struct Tuple2 : public Tuple<K, 2>
  30 {
  31   Tuple2 ()
  32   {
  33
  34   }
  35
  36   Tuple2 (K a, K b)
  37   {
  38     Tuple<K,2> *p(this);        //  ugr.
  39
  40     p->t_array[0] = a;
  41     p->t_array[1] = b;
  42   }
  43 };
  44
  45
  46 template<class T, int N>
  47 inline bool
  48 operator<(Tuple<T, N> const &t1,
  49           Tuple<T, N> const &t2)
  50 {
  51   for (int i = 0; i < N ; i++)
  52     {
  53       if (t1.t_array[i] > t2.t_array[i])
  54         return false;
  55       if (t1.t_array[i] < t2.t_array[i])
  56         return true;
  57     }
  58
  59   return false;
  60 }
  61
  62 #endif /* TUPLE_HH */