/// <summary>
///
/// </summary>
/// <param name="history"></param>
/// <param name="node"></param>
/// <returns>Number of false pushes to history</returns>
private bool CreateHistoryRecursevely(DebugStack history, SyntaxParsingNode node)
{
//Look at GrammarEntry
GrammarEntry current = node.Entry;
//Try to match Tokens or Entries store original history
int h = history.Count;
int t = node.Span.StartToken;
bool lastToken = false;
for (int k = 0; k < current.Blocks.Length; k++)
{
string b = current.Blocks[k];
//Look at next token if last one was
if (lastToken)
{
t++;
lastToken = false;
}
//Consider Grammar Block
if (b.StartsWith('!'))
{
bool found = false;
GrammarScheme next = BaseGrammar.GetNamed(b.Substring(1));
for (int i = 0; i < next.Overloads.Length; i++)
{
//Store Route
history.Push(i);
//Create Child and continue
SyntaxParsingNode c = node.ProduceChild();
c.Span = new TokenSpan(t);
c.Overload = i;
c.Scheme = next;
if (CreateHistoryRecursevely(history, c))
{
t = c.Span.EndToken;
lastToken = true;
found = true;
break;
}
else
{
history.Pop();
}
}
if (!found)
{
Console.WriteLine($"Considered Element: {node.Scheme.Name} [{node.Overload}]");
Console.WriteLine($" - Could not be created because of block: {b}");
Console.WriteLine($" - Error: No fitting overload found.\n---");
//Reset History
while (h < history.Count)
{
history.Pop();
}
//Return
return(false);
}
}
//Consider Token Block
else
{
//Match Token
if (t < node.Collection.Count && b == node.Collection[t].Name)
{
lastToken = true;
}
else
{
Console.WriteLine($"Considered Element: {node.Scheme.Name} [{node.Overload}]");
Console.WriteLine($" - Could not be created because of block: {b}");
Console.WriteLine($" - Error: { (t < node.Collection.Count ? $"Token did not match {node.Collection[t].Name}" : "The definition exceeds the assigned tokens.") }.\n---");
//Reset History
while (history.Count > h)
{
history.Pop();
}
//Return
return(false);
}
}
}
Console.WriteLine($"Considered Element: {node.Scheme.Name} [{node.Overload}]");
Console.WriteLine($" - Succesfully created!");
Console.WriteLine($" - Token Span: {node.Span.StartToken} - {t}\n---");
//Node was a match
node.Span.EndToken = t;
return(true);
}
public void SaveGrammarEntry(GrammarEntry entry)
{
if (entry.ObjectId == null)
{
entry.ObjectId = BsonObjectId.GenerateNewId();
}
grammarEntries[entry.Text] = entry;
}
