public void SyntaxError(TextWriter output, IRecognizer recognizer, TSymbol offendingSymbol, int line, int charPositionInLine, string msg, RecognitionException e)
{
var source = offendingSymbol is IToken t?
SourceRange.FromTokens(t, null) :
new SourceRange(new SourceLocation(line, charPositionInLine),
new SourceLocation(line, charPositionInLine));
mod.Diagnostics.AddError(msg, source);
}
private static SourceRange Source(ParserRuleContext context) => SourceRange.FromTokens(context.Start, context.Stop);
