Jip J. Dekker
35a3110598
git-subtree-dir: software/chuffed git-subtree-split: 2ed0c01558d2a5c49c1ce57e048d32c17adf92d3
27 lines
706 B
C++
27 lines
706 B
C++
#include <chuffed/core/propagator.h>
|
|
|
|
void newBinGE(IntView<> x, IntView<> y, BoolView r);
|
|
void newBinNE(IntView<> x, IntView<> y, BoolView r);
|
|
|
|
// x lex< y
|
|
|
|
// b[i] = r[i] || b[i+1]
|
|
// b[i] -> x[i] <= y[i]
|
|
// r[i] -> x[i] < y[i]
|
|
|
|
void lex(vec<IntVar*>& x, vec<IntVar*>& y, bool strict) {
|
|
vec<BoolView> b, r;
|
|
b.push(bv_true);
|
|
for (int i = 1; i < x.size(); i++) b.push(newBoolVar());
|
|
b.push(bv_false);
|
|
for (int i = 0; i < x.size(); i++) r.push(newBoolVar());
|
|
|
|
for (int i = 0; i < x.size()-1+strict; i++) {
|
|
bool_rel(r[i], BRT_OR, b[i+1], b[i]);
|
|
newBinGE(IntView<>(y[i]), IntView<>(x[i],1,1), r[i]);
|
|
}
|
|
for (int i = 0; i < x.size(); i++) {
|
|
newBinGE(IntView<>(y[i]), IntView<>(x[i]), b[i]);
|
|
}
|
|
}
|