public void ReadFromFile(string filePath)
{
int number = 1;
string[] lines = System.IO.File.ReadAllLines(@filePath);
foreach (string line in lines)
{
string[] parts = line.Split("-");
Nonterminals.Add(parts[0]);
string[] fileProductions = parts[1].Split("|");
var havePoductions = Productions.TryGetValue(parts[0], out var productions);
if (!havePoductions)
{
productions = new List <string>();
}
foreach (string production in fileProductions)
{
productions.Add(production);
ProductionNumber.Add(Tuple.Create(parts[0], production), number);
number++;
}
Productions.Add(parts[0], productions);
}
}
public bool Verify(string state, int k)
{
var results = new HashSet <string>();
var LLkTable = new List <Tuple <string, string, int> >();
var length = 0;
if (Productions.TryGetValue(state, out var productions))
{
productions.ForEach(p =>
{
if (p == "?")
{
p = "";
}
var words = new HashSet <string>();
if (p.Length < k && !HasNonterminal(p))
{
words.Add(p);
}
else
{
words = GenerateWords(p, k);
}
var hasFollow = Follow.TryGetValue(state, out var follows);
var values = new HashSet <string>();
foreach (var follow in follows)
{
foreach (var word in words)
{
if ((word + follow).Length >= k)
{
values.Add((word + follow).Substring(0, k));
}
else
{
values.Add(word + follow);
}
}
}
foreach (var value in values)
{
results.Add(value);
//ParserTable.Add(Tuple.Create(state, value), Tuple.Create(p, number));
ProductionNumber.TryGetValue(Tuple.Create(state, (p == "" ? "?" : p)), out var number);
LLkTable.Add(Tuple.Create(value, p, number));
}
length += values.Count;
});
}
if (length == results.Count)
{
LLkTable.ForEach(l =>
{
ParserTable.Add(Tuple.Create(state, l.Item1), Tuple.Create((l.Item2 == "" ? "?" : l.Item2), l.Item3));
});
return(true);
}
return(false);
}