@Override
public boolean update(RulesByName symbols) {
if (!symbols.hasRule(expr)) {
symbols.put(this.expr, this);
}
return true;
}
@Override
public FactorySupplyRule getActualRule(RulesByName symbols) {
FactorySupplyRule f = symbols.get(this.value);
if (f == null) {
throw new ParseErrorException("Undefined symbol " + value + " used in the rule");
}
return f;
}
@Override
public FactorySupplyRule getLeading(RulesByName names) {
return names.get(this.value);
}