public LalrItem(GrammarProduction production, int parsingPoint, TerminalSymbol lookahead)
{
if (this.ParsingPoint > production.Body.Count || ParsingPoint < 0)
{
throw new ArgumentOutOfRangeException(nameof(parsingPoint));
}
this.Production = production;
this.ParsingPoint = parsingPoint;
this.Lookahead = lookahead;
}
private bool TestNullable(GrammarProduction prod)
{
if (prod.Body.Count == 0)
{
return(true);
}
if (prod.Body.Any(s => s is TerminalSymbol))
{
return(false);
}
return(prod.Body.All(s => mNullableSymbols.Contains(s as NonterminalSymbol)));
}
public LalrReduce(GrammarProduction production)
{
this.Production = production;
}