public int?PrecedenceOf(ProductionRule production)
{
if (production.OverridePrecedence.HasValue)
{
return(PrecedenceOf(production.OverridePrecedence));
}
for (var i = production.Ingredients.Length - 1; i >= 0; --i)
{
var precedence = PrecedenceOf(production.Ingredients[i]);
if (precedence is not null)
{
return(precedence);
}
}
return(null);
}
public Associativity AssociativityOf(ProductionRule production)
{
if (production.OverridePrecedence.HasValue)
{
return(AssociativityOf(production.OverridePrecedence));
}
for (var i = production.Ingredients.Length - 1; i >= 0; --i)
{
var assoc = AssociativityOf(production.Ingredients[i]);
if (assoc != Associativity.Default)
{
return(assoc);
}
}
return(Associativity.Default);
}
public Item(ProductionRule production, int dotPos, Symbol follow)
{
Production = production;
DotPos = dotPos;
Follow = follow;
}
private bool Equals(ProductionRule other)
{
return(Product.Equals(other.Product) && Ingredients.SequenceEqual(other.Ingredients) &&
OverridePrecedence.Equals(other.OverridePrecedence));
}
public static ParseAction MakeReduce(ProductionRule productionUsed)
{
return(new(ParseActionType.Reduce, productionUsed));
}