private char ParseNonSpaceSep(out bool success)
{
int errorCount = Errors.Count;
char ch = MatchTerminalSet("\r\n\t ,[]{}", true, out success);
if (success) { ClearError(errorCount); }
else { Error("Failed to parse -\"\r\n\t ,[]{}\" of NonSpaceSep."); }
return ch;
}