public void NextToken()
{
if (_PeekToken == null)
{
_currentToken = Scan();
}
else
{
_currentToken = _PeekToken;
_PeekToken = null;
}
}
public void StartUp()
{
_reader = new StreamReader(_file);
_currentToken = null;
_PeekToken = null;
_lineNumber = 0;
}
public Token Peek()
{
return _PeekToken ?? (_PeekToken = Scan());
}