public Token GetToken(OpenExcel.Common.FormulaParser.TokenType type)
{
return(new Token(this.StartPos, this.EndPos)
{
Type = type
});
}
public Token(int start, int end)
{
this.Type = OpenExcel.Common.FormulaParser.TokenType._UNDETERMINED_;
this.startpos = start;
this.endpos = end;
this.Text = "";
this.Value = null;
}
public Token LookAhead(params OpenExcel.Common.FormulaParser.TokenType[] expectedtokens)
{
List <OpenExcel.Common.FormulaParser.TokenType> tokens;
int startPos = this.StartPos;
Token item = null;
if (((this.LookAheadToken != null) && (this.LookAheadToken.Type != OpenExcel.Common.FormulaParser.TokenType._UNDETERMINED_)) && (this.LookAheadToken.Type != OpenExcel.Common.FormulaParser.TokenType._NONE_))
{
return(this.LookAheadToken);
}
if (expectedtokens.Length == 0)
{
tokens = this.Tokens;
}
else
{
tokens = new List <OpenExcel.Common.FormulaParser.TokenType>(expectedtokens);
tokens.AddRange(this.SkipList);
}
do
{
int length = -1;
OpenExcel.Common.FormulaParser.TokenType type = (OpenExcel.Common.FormulaParser.TokenType) 0x7fffffff;
string input = this.Input.Substring(startPos);
item = new Token(startPos, this.EndPos);
for (int i = 0; i < tokens.Count; i++)
{
Match match = this.Patterns[tokens[i]].Match(input);
if ((match.Success && (match.Index == 0)) && ((match.Length > length) || ((((OpenExcel.Common.FormulaParser.TokenType)tokens[i]) < type) && (match.Length == length))))
{
length = match.Length;
type = tokens[i];
}
}
if ((type >= OpenExcel.Common.FormulaParser.TokenType._NONE_) && (length >= 0))
{
item.EndPos = startPos + length;
item.Text = this.Input.Substring(item.StartPos, length);
item.Type = type;
}
else if (item.StartPos < (item.EndPos - 1))
{
item.Text = this.Input.Substring(item.StartPos, 1);
}
if (this.SkipList.Contains(item.Type))
{
startPos = item.EndPos;
this.Skipped.Add(item);
}
}while (this.SkipList.Contains(item.Type));
this.LookAheadToken = item;
return(item);
}
protected object GetValue(ParseTree tree, OpenExcel.Common.FormulaParser.TokenType type, ref int index)
{
if (index >= 0)
{
foreach (ParseNode node in this.nodes)
{
if (node.Token.Type == type)
{
index--;
if (index < 0)
{
return(node.Eval(tree, new object[0]));
}
}
}
}
return(null);
}
protected object GetValue(ParseTree tree, OpenExcel.Common.FormulaParser.TokenType type, int index)
{
return(this.GetValue(tree, type, ref index));
}
