`RegExS` does not work as expected in Evaluator Group scheme since 13.14

[dpuser441]

Directory Opus 13.14 introduced a change to RegEx.

@Jon

The evaluator RegEx() function now behaves as documented - the entire string must match the supplied pattern. Use RegExS() for a partial match.

This cause my evaluator group to stop working. I could fix it by changing the regex pattern to match the full string - as expected.

However, just changing RegEx to RegExS does not work. Shouldn't it? I think this is a bug.

Here's my group scheme code:

// sample file name: IMG_20250323_131110.jpg
group = mid(value, 4, 8);
if (ispunct(group) or isspace(group))
	return "";
// works in 13.14 (added ".*" at end of pattern)
return RegEx(value, "(?:IMG_|VID_)(\d{4})(\d{2})(\d{2}).*", "\1-\2-\3");

// does not work in 13.14
return RegExS(value, "(?:IMG_|VID_)(\d{4})(\d{2})(\d{2})", "\1-\2-\3");

[lxp]

If the pattern matches the string partially, only the matching part will be replaced, leaving you with the undesired rest:

value="IMG_20250323_131110.jpg";
Output(RegEx(value, "(?:IMG_|VID_)(\d{4})(\d{2})(\d{2}).*", "\1-\2-\3"));
Output(RegExS(value, "(?:IMG_|VID_)(\d{4})(\d{2})(\d{2})", "\1-\2-\3"));

[dpuser441]

Oh yeah, that makes sense, thanks @lxp.