void Definition::addRule(uint id, bool onlyif, int defID, bool conj, Atom head, const litlist& ps) {
auto& def = rules[defID];
auto it = def.find(head);
if (it == def.cend()) {
def[head] = new TempRule(id, onlyif, head, conj, ps);
return;
}
auto prevrule = it->second;
if(prevrule->onlyif != prevrule->onlyif){
throw idpexception("Rules on the same head in the same definition need to have the same semantics.");
}
if (prevrule->conjunctive) { // introduce new var (we need disjunctive root anyway)
auto newvar = solver->newAtom();
def[newvar] = new TempRule(id, onlyif, newvar, prevrule->conjunctive, prevrule->body);
prevrule->conjunctive = false;
prevrule->body = {mkLit(newvar)};
}
if (conj) { // Create a new var and rule first
auto newvar = solver->newAtom();
def[newvar] = new TempRule(id, onlyif, newvar, conj, ps);
prevrule->body.push_back(mkPosLit(newvar));
} else { // Disjunctive, so can add directly
prevrule->body.insert(prevrule->body.end(), ps.cbegin(), ps.cend());
}
}
std::string ExternalConstraintVisitor::toString(const litlist& literals) const {
std::stringstream ss;
bool begin = true;
for (auto i = literals.cbegin(); i < literals.cend(); ++i) {
if (not begin) {
ss << " | ";
}
begin = false;
ss << toString(*i);
}
return ss.str();
}
