closer-mop
Closer to MOP is a compatibility layer that rectifies many of the absent or incorrect CLOS MOP features across a broad range of Common Lisp implementations.
$ area51 add closer-mopコピー使い方
;; area51 add で .asd が自動更新されます。
;; コード内でパッケージを使用:
(in-package :my-project)
(closer-mop:some-function ...)