public StringSet GetExpectedTermSet() {
if (CurrentParserState == null)
return new StringSet();
//See note about multi-threading issues in ComputeReportedExpectedSet comments.
if (CurrentParserState.ReportedExpectedSet == null)
CurrentParserState.ReportedExpectedSet = CoreParser.ComputeGroupedExpectedSetForState(Language.Grammar, CurrentParserState);
//Filter out closing braces which are not expected based on previous input.
// While the closing parenthesis ")" might be expected term in a state in general,
// if there was no opening parenthesis in preceding input then we would not
// expect a closing one.
var expectedSet = FilterBracesInExpectedSet(CurrentParserState.ReportedExpectedSet);
return expectedSet;
}
// Override this method to perform custom error processing
public virtual void ReportParseError(ParsingContext context)
{
string error = null;
if (context.CurrentParserInput.Term == this.SyntaxError)
{
error = context.CurrentParserInput.Token.Value as string; //scanner error
}
else if (context.CurrentParserInput.Term == this.Indent)
{
error = Resources.ErrUnexpIndent;
}
else if (context.CurrentParserInput.Term == this.Eof && context.OpenBraces.Count > 0)
{
if (context.OpenBraces.Count > 0)
{
//report unclosed braces/parenthesis
var openBrace = context.OpenBraces.Peek();
error = string.Format(Resources.ErrNoClosingBrace, openBrace.Text);
}
else
{
error = Resources.ErrUnexpEof;
}
}
else
{
var expectedTerms = context.GetExpectedTermSet();
error = ConstructParserErrorMessage(context, expectedTerms);
}
context.AddParserError(error);
}//method
