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sym-imp.cpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Christopher Mears <chris.mears@monash.edu>
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7 * Christopher Mears, 2012
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33
34#include <gecode/int/ldsb.hh>
35#include <gecode/int/branch.hh>
36
37namespace Gecode { namespace Int { namespace LDSB {
39 template <>
40 ArgArray<Literal>
41 VariableSymmetryImp<IntView>
42 ::symmetric(Literal l, const ViewArray<IntView>& x) const {
43 (void) x;
44 if (indices.valid(l._variable) && indices.get(l._variable)) {
45 int n = 0;
46 for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
47 n++;
48 ArgArray<Literal> lits(n);
49 int j = 0;
50 for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
51 lits[j++] = Literal(i.val(), l._value);
52 return lits;
53 } else {
54 return ArgArray<Literal>(0);
55 }
56 }
58 template <>
62 (void) x;
63 if (indices.valid(l._variable) && indices.get(l._variable)) {
64 int n = 0;
65 for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
66 n++;
67 ArgArray<Literal> lits(n);
68 int j = 0;
69 for (Iter::Values::BitSetOffset<Support::BitSetOffset<Space> > i(indices) ; i() ; ++i)
70 lits[j++] = Literal(i.val(), l._value);
71 return lits;
72 } else {
73 return ArgArray<Literal>(0);
74 }
75 }
76
78 template <>
82 (void) x;
83 if (values.valid(l._value) && values.get(l._value)) {
84 int n = 0;
86 n++;
87 ArgArray<Literal> lits(n);
88 int j = 0;
90 lits[j++] = Literal(l._variable, i.val());
91 return lits;
92 } else {
93 return ArgArray<Literal>(0);
94 }
95 }
97 template <>
101 (void) x;
102 if (values.valid(l._value) && values.get(l._value)) {
103 int n = 0;
105 n++;
106 ArgArray<Literal> lits(n);
107 int j = 0;
109 lits[j++] = Literal(l._variable, i.val());
110 return lits;
111 } else {
112 return ArgArray<Literal>(0);
113 }
114 }
115
117 template <>
121 (void) x;
122 Region region;
124 std::pair<int,int> location = findVar(values, n_values, seq_size, l._value);
125 if (location.first == -1) return dynamicStackToArgArray(s);
126 unsigned int seqNum = location.first;
127 unsigned int seqPos = location.second;
128 if (! dead_sequences.get(seqNum)) {
129 for (unsigned int seq = 0 ; seq < n_seqs ; seq++) {
130 if (seq == seqNum) continue;
131 if (dead_sequences.get(seq)) continue;
132 s.push(Literal(l._variable, getVal(seq,seqPos)));
133 }
134 }
135 return dynamicStackToArgArray(s);
136 }
138 template <>
142 (void) x;
143 Region region;
145 std::pair<int,int> location = findVar(values, n_values, seq_size, l._value);
146 if (location.first == -1) return dynamicStackToArgArray(s);
147 unsigned int seqNum = location.first;
148 unsigned int seqPos = location.second;
149 if (! dead_sequences.get(seqNum)) {
150 for (unsigned int seq = 0 ; seq < n_seqs ; seq++) {
151 if (seq == seqNum) continue;
152 if (dead_sequences.get(seq)) continue;
153 s.push(Literal(l._variable, getVal(seq,seqPos)));
154 }
155 }
156 return dynamicStackToArgArray(s);
157 }
158
159}}}
160
161// STATISTICS: int-branch
NNF * l
Left subtree.
int n
Number of negative literals for node type.
Argument array for non-primitive types.
Definition array.hpp:691
A Literal is a pair of variable index and value.
Definition ldsb.hh:46
Implementation of a value sequence symmetry.
Definition ldsb.hh:266
Implementation of a value symmetry.
Definition ldsb.hh:204
Implementation of a variable symmetry.
Definition ldsb.hh:183
Value iterator for values in an offset bitset.
Handle to region.
Definition region.hpp:55
Bitsets with index offset.
Stack with arbitrary number of elements.
void push(const T &x)
Push element x on top of stack.
View arrays.
Definition array.hpp:253
std::pair< int, int > findVar(int *indices, unsigned int n_values, unsigned int seq_size, int index)
Find the location of an integer in a collection of sequences.
Definition ldsb.cpp:42
ArgArray< T > dynamicStackToArgArray(const Support::DynamicStack< T, A > &s)
Convert a DynamicStack<T,A> into an ArgArray<T>
Definition sym-imp.hpp:39
Gecode toplevel namespace
void values(Home home, const IntVarArgs &x, IntSet y, IntPropLevel ipl=IPL_DEF)
Post constraint .
Definition aliases.hpp:143
Post propagator for SetVar x
Definition set.hh:767