public LRxItem(int produce, ExpressInt express, int index, CHashSet <int> lookahead)
{
this.produce = produce;
this.express = express;
this.index = index;
this.lookahead = lookahead;
}
// public int GetCoreHashCode()
// {
// int result = 3;
// IntHash.Combine(ref result, produce);
// IntHash.Combine(ref result, express.GetHashCode());
//
// return result;
// }
#if DEBUG
public override string ToString()
{
if (index == 0)
{
return($"{Grammar.bag[produce]} -> . {express}");
}
else if (IsEnd)
{
return($"{Grammar.bag[produce]} -> {express} .");
}
string st = $"{Grammar.bag[produce]} ->";
ExpressInt e = express;
int max = e.Length;
for (int x = 0; x < max; x++)
{
if (x == index)
{
st += " .";
}
int now = e[x];
st += " " +
(now.IsTerminal()
? ((TokenType)now).ToString()
: Grammar.bag[now]);
}
return(st);
}
public LRxItem(GItem source, CHashSet <int> la)
{
produce = source.produce;
express = source.express;
lookahead = la;
}