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【CommonLisp】別パッケージの関数と同名の関数を定義したい

Last updated at Posted at 2022-12-02

結論

shadowを使おう

human.lisp
(provide :human)

(defpackage :human
  (:use :cl) ; 1. clでexportされているsymbolをすべてインターンする
  (:shadow :print) ; 2. こう書くことによってclのprintはhumanにインターンされない
  (:export :print))
(in-package :human)

(defun print () ; 3. そしてhumanでprintを定義することができる
  (cl:print "Hello, World!!")) ; 4. 修飾子をつけることでclのprintが利用できる
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