通用Lisp中的跨包defgeneric/defmethod?
在CLOS包a中定义泛型并在包B中提供泛型方法的正确方法是什么 提前谢谢你 例如:通用Lisp中的跨包defgeneric/defmethod?,lisp,common-lisp,clos,Lisp,Common Lisp,Clos,在CLOS包a中定义泛型并在包B中提供泛型方法的正确方法是什么 提前谢谢你 例如: (defpackage :common (:use :cl)) (in-package :common) (defgeneric compare (a b)) (defmethod compare ((a number) (b number)) (cond ((< a b) -1) ((= a b) 0) (T 1))) (defpackage :a (:
(defpackage :common (:use :cl))
(in-package :common)
(defgeneric compare (a b))
(defmethod compare ((a number) (b number))
(cond ((< a b) -1)
((= a b) 0)
(T 1)))
(defpackage :a (:use :cl))
(in-package :a)
(defclass foo (a b))
(defmethod compare ((x foo) (y foo)) ...)
; SBCL isn't able to access this method via the common package
(defpackage:common(:use:cl))
(包装内:通用)
(a、b)
(方法比较((a号)(b号))
(条件(
方法和函数不属于包。符号属于包
(defpackage :common (:use :cl))
(in-package :common)
(defgeneric compare (a b))
(defmethod compare ((a number) (b number))
(cond ((< a b) -1) ((= a b) 0) (T 1)))
(defpackage :a (:use :cl))
(in-package :a)
(defclass foo (a b))
如果COMPARE已从package COMMON导出,则可以编写:
(defmethod common:compare ((x foo) (y foo)) ...)
(defmethod compare ((x foo) (y foo)) ...)
如果COMPARE已从package COMMON导出,并且package A将“使用”package COMMON,则您可以编写:
(defmethod common:compare ((x foo) (y foo)) ...)
(defmethod compare ((x foo) (y foo)) ...)
非常感谢你!正是我所期望的。