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From: Patricia Ferreira <pferreira@example.com>
Newsgroups: pt.comp.programacao
Subject: mais sobre loops em common lisp
Date: Sun, 10 Mar 2024 19:28:54 -0300
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Eis uma alternativa a loop.  Em vez de escrever, por exemplo,

  (loop for e in ls
        when (> e 3)
          collect e)

podemos escrever

  (iter (for e in ls)
        (when (> e 3)
          (collect e))).

Eis uma boa leitura.

  https://iterate.common-lisp.dev/doc/Don_0027t-Loop-Iterate.html#Don_0027t-Loop-Iterate

Gostei.  É idêntica a loop, mas com vantagens.