public void Advance()
{
if (tokenQueue.Count > 0)
{
currentToken = tokenQueue.Dequeue();
}
}
public JackTokenizer(StreamReader inputStream)
{
stream = inputStream;
currentToken = null;
tokenQueue = new Queue <JackToken>();
blockCommentActive = false;
lineNumber = 0;
}
/// <summary>
/// Helper function for CheckTokenSequence(). Should not be called independently.
/// </summary>
private bool CheckToken(JackToken jt, string checkValue, out string errorMessage)
{
bool errorFound = false;
bool checkType = false;
bool listOfValues = false;
bool listOfTypes = false;
errorMessage = checkValue;
checkType = (checkValue[0] == '?');
listOfValues = (checkValue[0] == '%');
listOfTypes = (checkValue[0] == '^');
if (checkType)
{
if (jt.Type.ToString() != checkValue.Substring(1))
{
errorMessage = checkValue.Substring(1);
errorFound = true;
}
}
else if (listOfValues || listOfTypes)
{
bool matchFound = false;
bool isTypeCheck = false;
string[] values = checkValue.Split('%', '^', ' ');
string matchValue = listOfValues ? jt.Value : jt.Type.ToString();
foreach (string s in values)
{
if (s == "type")
{
matchFound = jt.IsType();
}
else if (s == matchValue)
{
matchFound = true;
break;
}
}
if (isTypeCheck && !matchFound)
{
if (jt.Type.ToString() == "identifier")
{
matchFound = true;
}
}
if (!matchFound)
{
errorMessage = "one of [" + checkValue.Substring(1) + "]";
errorFound = true;
}
}
else
{
if (jt.Value != checkValue)
{
errorMessage = checkValue;
errorFound = true;
}
}
return(!errorFound);
}
/// <summary>
/// Helper function for CheckTokenSequence(). Should not be called independently.
/// </summary>
private bool CheckToken(JackToken jt, string checkValue)
{
string dummy;
return(CheckToken(jt, checkValue, out dummy));
}