@Override
public VarUsage count(final Var var) {
final VarUsage inRoot = root == null ? VarUsage.NEVER : root.count(var);
return VarUsage.sum(var, steps) == VarUsage.NEVER ? inRoot : VarUsage.MORE_THAN_ONCE;
}
@Override
public VarUsage count(final Var var) {
return occ != null ? VarUsage.sum(var, occ).plus(query.count(var)) : query.count(var);
}
@Override
public int count(final Var v) {
return weight.count(v) + super.count(v);
}
@Override
public final int count(final Var v) {
int c = 0;
for (final Expr s : steps) c += s.count(v);
return c + super.count(v);
}