public IRuleRef <TNode> DefineRule(string?name, IRule rule)
{
var ruleRef = new RuleRef <TNode>(rule);
if (!string.IsNullOrEmpty(name))
{
if (_definedRules.ContainsKey(name))
{
throw new InvalidOperationException($"Cannot define a rule with the same name twice: {name}");
}
_definedRules[name] = ruleRef;
}
return(ruleRef);
}
public IRuleRef <TNode> Ref(string name)
{
if (_definedRules.ContainsKey(name))
{
return(_definedRules[name].CloneRule().As(name));
}
if (!_unresolvedRules.ContainsKey(name))
{
_unresolvedRules[name] = new List <RuleRef <TNode> >();
}
var ruleRef = new RuleRef <TNode>();
_unresolvedRules[name].Add(ruleRef);
return(ruleRef.As(name));
}
public void Resolve(RuleRef <TNode> parent)
{
Rule = parent.Rule;
Reducer = Reducer ?? parent.Reducer;
}
