/// <summary>
/// Adds a parsing rule to the recursive descent parser.
/// If the rule with the name already exists, it adds another production to said rule.
/// </summary>
/// <param name="name">Name of the rule</param>
/// <param name="decider">Function to evaluate if we can apply the rule</param>
/// <param name="evaluator">Function that generates an AST node</param>
/// <returns>Self for chaining purposes</returns>
public RecursiveDescentParser AddRule(string name, ProductionDecider decider, ProductionEvaluator evaluator)
{
var rule = _rules.FirstOrDefault(r => r.Name == name);
if (rule == null)
{
rule = new ParsingRule(this)
{
Name = name
};
_rules.Add(rule);
}
rule.AddProduction(decider, evaluator);
return this;
}
/// <summary>
/// Adds a production to the rule
/// </summary>
/// <param name="decider">Function to evaluate if the rule applies</param>
/// <param name="evaluator">Function to generate a node from the token list</param>
public void AddProduction(ProductionDecider decider, ProductionEvaluator evaluator)
{
_productions.Add(decider, evaluator);
}
