It's not about using CLOS, since that is Lisp specific and the full thing incl. MOP is largish. But Moose is largely influenced by CLOS. https://www.perl.org/

It's not about using CLOS, since that is Lisp specific and the full thing incl. MOP is largish. But Moose is largely influenced by CLOS. https://www.perl.org/about/whitepapers/perl-object-oriented.html https://www.perl.org/about/whitepapers/perl-object-oriented.... some comment here on Hackernews : "Moose is back-ported Perl6 objects, which borrows heavily from CLOS and the concepts introduced in the Smalltalk traits paper. This is a bit of a simplification of the history, but the ancestry is present, documented and obvious."