No, it does not work. Avoid it like the plague.

It does not even work for the examples provided (i.e. fails to find the sub-STRING, zyz). It cannot find substrings let alone sub-sequences.

Both Lima One (author of String::LCSS_XS) and I have a versions of working LCSS code that either of us would like to donate to the namespace String::LCSS. But Daniel Yacob has the claim to the namesapce and he disappeared more than 5 years ago.

Is there a way to invoke the Dutch legal concept of the "law of the shovel" here? If you do not put in the work to the maintain the levy which keeps your land dry you may lose claim to the protected land to the guy who is actually maintaining the levy.

Can we consider String::LCSS to be "abandoned" and therfore the name space should be assigned to the person (or people) willing to work in and maintain that namespace?