cl-series | A Common Lisp extension for general iterations | Mehr ...
This is an implementation of the series package as described in the Appendix of Common Lisp The Language (the book is available in the form of the cltl package). . It was proposed as a more functional replacement for the build-in LOOP macro, but never gained the status of official standard. . In general this package can do almost all iteration constructs in an extensible way and produces quite fast optimised code. . This is an old package without upstream but stable and quite bugfree.