/** <summary>Override this method to change where error messages go</summary> */
public virtual void EmitErrorMessage(string msg)
{
if (TraceDestination != null)
{
TraceDestination.WriteLine(msg);
}
}
/** <summary>
* Record whether or not this rule parsed the input at this position
* successfully. Use a standard java hashtable for now.
* </summary>
*/
public virtual void Memoize(IIntStream input,
int ruleIndex,
int ruleStartIndex)
{
int stopTokenIndex = state.failed ? MemoRuleFailed : input.Index - 1;
if (state.ruleMemo == null)
{
if (TraceDestination != null)
{
TraceDestination.WriteLine("!!!!!!!!! memo array is null for " + GrammarFileName);
}
}
if (ruleIndex >= state.ruleMemo.Length)
{
if (TraceDestination != null)
{
TraceDestination.WriteLine("!!!!!!!!! memo size is " + state.ruleMemo.Length + ", but rule index is " + ruleIndex);
}
}
if (state.ruleMemo[ruleIndex] != null)
{
state.ruleMemo[ruleIndex][ruleStartIndex] = stopTokenIndex;
}
}
public virtual void TraceIn(string ruleName, int ruleIndex, object inputSymbol)
{
if (TraceDestination == null)
{
return;
}
TraceDestination.Write("enter " + ruleName + " " + inputSymbol);
if (state.backtracking > 0)
{
TraceDestination.Write(" backtracking=" + state.backtracking);
}
TraceDestination.WriteLine();
}
public virtual void TraceOut(string ruleName, int ruleIndex, object inputSymbol)
{
if (TraceDestination == null)
{
return;
}
TraceDestination.Write("exit " + ruleName + " " + inputSymbol);
if (state.backtracking > 0)
{
TraceDestination.Write(" backtracking=" + state.backtracking);
if (state.failed)
{
TraceDestination.Write(" failed");
}
else
{
TraceDestination.Write(" succeeded");
}
}
TraceDestination.WriteLine();
}
