I can understand that debugging expanded code is not fun. On the other hand, LOOP allows to naturally express iteration patterns that can be error-prone with o

I can understand that debugging expanded code is not fun. On the other hand, LOOP allows to naturally express iteration patterns that can be error-prone with other languages: you hardly produce off-by-one bugs contrary to hand-crafted loops. See the Appendix of the Iterate manual for a comparison of looping constructs in CL: http://common-lisp.net/project/iterate/doc/Don_0027t-Loop-Iterate.html http://common-lisp.net/project/iterate/doc/Don_0027t-Loop-It....