private void Error(string error, string line, int location) { // append the line for context result.Append("\n"); result.Append("// "); AppendSubstring(line, 0, true, line.Length, false); result.Append("\n"); // append the location marker, and error description result.Append("// "); result.AppendSpaces(location); result.Append("^ "); result.Append(error); result.Append("\n"); }