/// <summary>Gets the source input text for a <see cref="ParserRuleContext"/> produced by an <see cref="IRecognizer"/></summary>
/// <param name="ruleContext">Rule context to get the source text from</param>
/// <param name="charStream">The stream the rule was parsed from</param>
/// <returns>Source contents for the rule or an empty string if the source is not available</returns>
public static string GetSourceText(this ParserRuleContext ruleContext, ICharStream?charStream)
{
if (charStream == null)
{
return(string.Empty);
}
var span = ruleContext.GetCharInterval( );
return(span.a < 0 ? string.Empty : charStream.GetText(span));
}
public override void ExitEveryRule([NotNull] ParserRuleContext context)
{
base.ExitEveryRule(context);
var span = context.GetCharInterval( );
var charStream = (( ITokenStream )Recognizer.InputStream).TokenSource.InputStream;
ActiveNode.Add(new XAttribute("Text", charStream.GetText(span)));
ActiveNode.Add(new XAttribute("RuleIndex", context.RuleIndex));
ActiveNode.Add(new XAttribute("SourceInterval", context.SourceInterval.ToString( )));
if (context.exception != null)
{
ActiveNode.Add(new XAttribute("Exception", context.exception));
}
Pop( );
}