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values-union.hpp
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4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2008
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10  * $Date: 2011-02-01 14:31:23 +0100 (Tue, 01 Feb 2011) $ by $Author: schulte $
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37 
38 namespace Gecode { namespace Iter { namespace Values {
39 
46  template<class I, class J>
47  class Union {
48  protected:
50  I i;
52  J j;
54  int v;
56  bool done;
57  public:
59 
60  Union(void);
63  Union(I& i, J& j);
65  void init(I& i, J& j);
67 
69 
70  bool operator ()(void) const;
73  void operator ++(void);
75 
77 
78  int val(void) const;
81  };
82 
83 
84  template<class I, class J>
86  Union<I,J>::Union(void) : v(0) {}
87 
88  template<class I, class J>
89  forceinline void
91  if (i()) {
92  if (j()) {
93  if (i.val() == j.val()) {
94  v=i.val(); ++i; ++j;
95  } else if (i.val() < j.val()) {
96  v=i.val(); ++i;
97  } else {
98  v=j.val(); ++j;
99  }
100  } else {
101  v=i.val(); ++i;
102  }
103  } else if (j()) {
104  v=j.val(); ++j;
105  } else {
106  done=true;
107  }
108  }
109 
110  template<class I, class J>
111  inline void
112  Union<I,J>::init(I& i0, J& j0) {
113  i=i0; j=j0; v=0; done=false;
114  operator ++();
115  }
116 
117  template<class I, class J>
119  Union<I,J>::Union(I& i0, J& j0) : i(i0), j(j0), v(0), done(false) {
120  operator ++();
121  }
122 
123  template<class I, class J>
124  forceinline bool
126  return !done;
127  }
128 
129  template<class I, class J>
130  forceinline int
131  Union<I,J>::val(void) const {
132  return v;
133  }
134 
135 }}}
136 
137 // STATISTICS: iter-any
void operator++(void)
Move iterator to next value (if possible)
Gecode::IntArgs i(4, 1, 2, 3, 4)
bool done
Whether iterator is done.
bool operator()(void) const
Test whether iterator is still at a value or done.
const int v[7]
Definition: distinct.cpp:207
int val(void) const
Return current value.
void init(I &i, J &j)
Initialize with values from i and j.
#define forceinline
Definition: config.hpp:132
Value iterator for the union of two value iterators.
Gecode toplevel namespace
Union(void)
Default constructor.